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Supplemental Site Investigation Report
SUPPLEMENTAL SITE INVESTIGATION REPORT Tigard Library 13500 SW Hall Boulevard Tigard, Oregon October 27, 2006 ` HAI Project No. 6486 DEQ ECSI No. 4063 „»k I s nil A. 4;- � e �s» 7 "k HAI HAHN AND ASSOCIATES, INC. ENVIRONMENTAL CONSULTANTS 434 NW 6TH AVENUE, SUITE 203 ASSESSMENT " PORTLAND, OREGON 97209-3651 INVESTIGATION Tel 503.769.0717•Fax 503.227.2209 REMEDIATION www.hahnenv.com SUPPLEMENTAL SITE INVESTIGATION REPORT Tigard Library 13500 SW Hall Boulevard Tigard, Oregon October 27, 2006 Prepared for: City of Tigard Tigard, Oregon Prepared by: Hahn and Associates, Inc. Portland, Oregon HAI Project No. 6486 DEQ ECSI No. 4063 TABLE OF CONTENTS 1.0 SUMMARY OF FINDINGS...................................................................................... 1 2.0 INTRODUCTION ....................................................................................................2 3.0 BACKGROUND ......................................................................................................2 3.1 Site Description and Investigation History.....................................................2 3.2 Pre-Development Site Topography...............................................................4 4.0 PROJECT ACTIVITIES...........................................................................................5 4.1 Objectives and Scope of Work......................................................................5 4.2 Sampling Locations and Rational..................................................................6 4.3 Soil Sampling Methods.................................................................................8 4.4 Analytical Testing Program...........................................................................9 4.5 Quality Assurance and Quality Control .........................................................9 4.6 Deviations from the Work Plan ................................................................... 10 5.0 RESULTS AND DISCUSSION.............................................................................. 11 5.1 Screening Levels........................................................................................ 11 5.2 Soil Testing Results.................................................................................... 12 5.3 Preliminary Risk Screening......................................................................... 14 6.0 LIMITATIONS AND SIGNATURES....................................................................... 17 7.0 GLOSSARY OF ABBREVIATIONS....................................................................... 18 TABLES 1 Summary of Arsenic Testing in Soil (8 pages) FIGURES 1 Site Location Map 2 Site Map and Sample Locations 3 Arsenic in Soil: In-Place and Removed (All Depths) 4 Pre-Development Topography and Area of Arsenic Impact 5 Areas of Potential Concern APPENDICES A Laboratory Reports and Chain-of-Custody Documentation: May 2006 Soil Samples Supplemental Site Investigation Page i of i Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 6.186 Sup it R(epn coc HAHN AND ASSOCIATES, INC. 1.0 SUMMARY OF FINDINGS Supplemental site investigation activities were conducted at the new Tigard Library property located at 13500 SW Hall Boulevard to further evaluate the extent of elevated levels of arsenic in near-surface soil at the property. In May 2006, soil samples were collected for arsenic testing from near-surface soils at 44 locations. A summary of the findings relating to the 2006 and prior work activities is presented below. 1) Arsenic was detected in the soil samples at concentrations up to 113 milligrams/kilogram (mg/kg). Following a 2003 removal action, arsenic-affected soil (i.e. > 7 mg/kg) remains at two primary low-lying or swale-like areas of the site, the Northern Area and the Southern Area. Elevated arsenic also remains at three smaller areas of the property 2) The 2006 testing results confirmed the conceptual site model that suggested elevated arsenic concentrations are limited to the swales and lower-lying areas of the property 3) The lateral extent of arsenic-affected soil appears to be adequately delineated on the subject property. The arsenic impact extends into the Wall Street right-of-way south of the library property. It is not clear to what extent arsenic-impacted soil may be present south of the Wall Street right-of-way beyond the southwest portion of the study area 4) Although the vertical extent of arsenic-affected soil has been shown to be typically less than 3 feet in depth, arsenic impacts appear to extend to pre-development depths of up to 6 feet in the Southern Area. Deeper impacts appear to be limited to the central portions of the swale/drainage areas. The full vertical extent of arsenic impact was not determined at some locations within the Southern Area 5) Preliminary risk evaluation identified possible receptors that could be exposed to the arsenic-affected soil (by direct contact) as library workers, library users, park users, construction workers, and terrestrial ecological receptors 6) Generic risk screening levels have been established by the Oregon Department of Environmental Quality (DEQ)for occupational (library) workers, construction workers, and terrestrial ecological receptors. Preliminary screening shows that approximately 3.1 acres of the Supplemental Site Investigation Page 1 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 6486'Stip Iry Repr:.rl do" HAHN AND ASSOCIATES,INC property may contain arsenic levels above the default background level/occupational screening level of 7 mg/kg; 1.9 acres are above the construction worker screening level of 13 mg/kg; and 0.3 acres are above the terrestrial ecological screening level of 50 mg/kg 7) Further risk evaluation/assessment (human health and ecological), incorporating site-specific factors, appears warranted to determine whether unacceptable risks are in reality posed by the uncapped areas of remaining arsenic-affected soil at the property. 2.0 INTRODUCTION The City of Tigard retained Hahn and Associates, Inc. (HAI)to perform supplemental site investigation activities at the new Tigard Library property (site) relating to elevated levels of arsenic in near-surface soil. The site is located at 13500 SW Hall Boulevard in the City of Tigard (Figure 1). The supplemental investigation activities were completed in general accordance with the April 10, 2006 Work Plan for Supplemental Site Investigation (Work Plan). The Work Plan was conditionally approved by the Oregon Department of Environmental Quality (DEQ) in a letter dated April 21, 2006. The conditions of the DEQ approval were incorporated into the investigation activities. The primary objectives of the supplemental investigation activities were to further characterize the magnitude and extent of arsenic-affected soil at the site, evaluate the effectiveness of prior soil removal efforts, and collect additional data for risk assessment purposes. 3.0 BACKGROUND 3.1 Site Description and Investigation History The approximate 14.7-acre subject property is located in the City of Tigard, in Washington County Oregon. The property is located in the NE 1/4 of the SE 1/4 of Section 2, Township 2 South, Range 1 West of the Willamette Meridian. The property is bordered to the north and east by Fanno Creek, to the west by SW Hall Boulevard, and to the south by the Wall Street right-of- way and the Fanno Point Condominium property beyond. For purposes of Supplemental Site Investigation Page 2 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 6466 Sup Jnv R(ep:r'i=t:=t: HAHN AND ASSOCIATES, INC this report, the subject site includes the City-owned Wall Street right-of-way located immediately adjacent to the south of the library property. The central portion of the subject property was used as an orchard from at least 1940 until 1953. Soil sampling activities conducted in 2002 and 2003 indicated that arsenic, a pesticide historically applied to orchards, was present in near-surface soil at the subject property at concentrations exceeding the 7-milligram per kilogram (mg/kg) default background concentration for this constituent. Cumulative analytical data from pre- and post-development sampling is provided in Table 1. Historical and current (2006) sampling locations are shown on Figure 2, while associated arsenic concentrations and an interpreted extent of arsenic impact are shown on Figure 3. In preparation for construction of the new library, removal of soil identified to contain arsenic at concentrations above the established 7-mg/kg cleanup goal within the construction area was performed under the direction of Apex Environmental Consulting Services, Inc. (Apex). According to Apex's September 22, 2003 closeout report entitled Arsenic Contaminated Soils Removal Close Out Report/Work Plan Update (Closeout Report), approximately 3,682 tons of soil were excavated and disposed offsite at the Hillsboro Landfill. The area where soil was removed from the site and Apex's confirmation sampling locations are shown on Figure 2, and Apex's confirmation sampling results are shown on Figure 3. Construction of the new library was completed in 2004. In April 2005, HAI completed an evaluation of pre-and post-development site characterization activities and data (including Apex's excavation activities and confirmation sampling results), including the preparation of a summary report entitled Summary of Pre and Post-Development Arsenic Soil Data (Summary Report), dated April 15, 2005. In a May 6, 2005 letter commenting on the summary report, the DEQ indicated that additional characterization was necessary for the site. In September and October 2005, HAI performed interim soil characterization activities within the footprint of a bicycle path now in-place along the eastern and northern portions of the site. The sampling was performed on an interim basis (relative to the ongoing site wide characterization efforts)to facilitate the City's expedited bike path construction schedule. Results of the characterization sampling identified one primary section of the proposed Supplemental Site Investigation Page 3 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 6486 Sk.p Inv kop,r!doc HAHN AND ASSOCIATES, INC path (in the northeast portion of the site)with soil containing concentrations of arsenic in excess of 7 mg/kg. In November 2005, HAI oversaw the removal of approximately 155 tons of arsenic affected soil from within the proposed bike path footprint identified to contain arsenic in excess of the 7 mg/kg background concentration. The interim soil removal activities, including soil characterization and confirmation sampling results, are documented in the April 2006 Work Plan. A Work Plan for Supplemental Site Investigation dated April 10, 2006 was prepared by HAI and submitted to DEQ for approval. The Work Plan was conditionally approved by the DEQ in a letter dated April 21, 2006. DEQ requested that at least two samples be added to the large un-sampled area in the northwest portion of the site, and that at least two locations be sampled in the tree areas of the library site. The conditions of the DEQ approval were incorporated into the investigation activities. 3.2 Pre-Development Site Topography Transport of arsenic-affected soil from up-gradient off-site orchard properties with deposition in historic low-lying drainages and swales on the subject property is the conceptual model for the observed pattern of arsenic at the site. On-site erosion and overland transport of arsenic within soil, with deposition in low-lying areas may also explain the observed pattern of arsenic at the site. Regional topographic contour lines are shown on Figure 1 and pre-development topographic contour lines and associated elevations for the site are presented on Figures 2 and 4. Currently, a drainage ditch enters the southern portion of the subject property from a retention pond located on Fanno Point Condominium property (Figure 2). The drainage ditch turns east and drains to a pond located on the southeast portion of the library property. Based on a review of area topography, this drainage ditch appears to receive runoff from an approximate 130-acre drainage basin that extends at least 6,000 feet to the west-southwest of the site (Figure 1). A review of pre-development site topography suggests that surface runoff would have generally flowed over the site in northeasterly and easterly directions towards Fanno Creek. Two generally distinct topographic swales/drainages (relative to the site topography) are present on the site, which appear to have been the primary historic migration pathways for Supplemental Site Investigation Page 4 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 6486 Stip h",'Re poT1,doo; HAHN AND ASSOCIATES,INC surface water runoff. One of these swales is arranged in a southwest/northeast orientation across the main library property. The second Swale is oriented east/west along the southern margin of the property, paralleling part of the current drainage ditch. Both swales appear to be branches of a single swale/drainage that enters the site at the southwest corner of the property The topographic divide between the branches of the swales runs on a southwest to northeast diagonal through the central portion of the site. On Figure 4, which depicts a 1940 aerial photograph, an historic drainage ditch (originating off-site) is seen traversing the southern part of the study area. It appears that this drainage had been altered from its natural course. Prior to 1940, it is possible that this drainage may have corresponded with the topographic Swale now observed to traverse the subject property from southwest to northeast, where elevated arsenic levels have been observed. Current low lying areas on the subject property include the flood plain of Fanno Creek and the pond located in the southeast corner of the site. Although the specific source or sources of the elevated arsenic found at the site are not known, the greatest concentrations in soil on the property (up to 113 mg/kg) have been detected in the east-west trending Swale on the southern portion of the site in an area that would not have received runoff from on-site orchard areas. Based on the size and extent of the drainage basin feeding the swale/ditch that enters the site, run-off from orchards formerly located to the southwest of the property may have contributed to the identified arsenic-affected soil. 4.0 PROJECT ACTIVITIES 4.1 Objectives and Scope of Work The purpose of the supplemental investigation activities was as follows: 1)to evaluate arsenic in soil in on-site areas where adequate characterization had not been performed; 2)to further delineate areas where arsenic had been detected in soil at concentrations exceeding the default background level (7 mg/kg); 3)to evaluate the effectiveness of Apex soil removal efforts in areas where excavation depths were unclear and confirmation sampling did not adequately indicate whether arsenic-affected soil had been removed to Supplemental Site Investigation Page 5 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 hw R €oll dof HAHN AND ASSOCIATES, INC below the default background level; and 4)to collect additional data for risk assessment purposes. The scope of work for the site investigation included the collection of soil samples from 44 locations across the site. Soil sampling activities were conducted by HAI field personnel on May 10, 11, 12, and 15, 2006. Soil samples were collected from multiple one-foot intervals at each location with a maximum collection depth of 6 feet below pre-development ground surface (bgs). Pre-development ground surface is the elevation of the ground surface prior to library construction, as shown on topographic contours on Figures 2 and 4. Sample depths were adjusted to account for the thickness of new fill placed at the site during library construction. Soil sample locations are shown on Figure 2. The number of samples and sample intervals for each of the locations are indicated in Table 1. The following sections present the sample locations, rational, and field methodologies for the investigation activities. 4.2 Sampling Locations and Rational Soil samples were collected from four general areas on the subject property to further characterize the presence, magnitude, and extent of arsenic- affected soil. For ease of differentiating this round of sampling from previous sampling events, sample locations were designated by an alphabetic label (i.e. A through Z, Aa through Az, etc.). The sampled areas and sub-areas include: 1) The Northern Area (A— N, Aq, and Ar)— included the uncharacterized area to the north/northeast of the new library building between the building and Fanno Creek a. Flood Plain (A- G)—included low-lying areas adjacent to Fanno Creek b. Historic Swale (H - N)— included the uncharacterized historic Swale between the library and the northern flood plain c. Open Field (Aq -Ar) —included the uncharacterized field in the northwest portion of the site (topographic high area) between the library and Fanno Creek. These samples were added at the request of DEQ. Supplemental Site Investigation Page 6 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 4fif Sup Inv R p +.(Mo' HAHN AND ASSOCIATES,INC 2) The Southern Area (O -Ah)— included the uncharacterized southeast portion and southern margin of the site and the SW Wall Street right-of- way a. Flood Plain (O - U)—included low-lying areas on the southeast portion of the site adjacent to Fanno Creek b. Pond Area (V-Y)— included the area surrounding the existing pond within the flood plain of the southeast portion of the site c. Historic Swale (Z- Ac)— included the existing and historic east- west Swale that is present at the southern margin of the site; one location (Ac)was also for characterizing the extent of deeper(>2 feet bgs) arsenic impacts found at location SS-44 where it was not clear whether full removal took place d. Wall Street Right-of-Way (Ad -Ag)— included uncharacterized areas of the Wall Street right-of-way south of the site. One location (Ag)was also proposed for characterizing the extent of deeper(>2 feet bgs) arsenic impacts found at location 12S. e. Hall Blvd. Right-of-Way(Ah)—this location was for characterizing the extent of deeper (>2 feet bgs) arsenic impacts found at location 12S. 3) The Southwest Margin (Ai, Aj, Ak)— included the not fully characterized area adjacent to the southwestern margin of the Apex soil removal area; included the historic small family orchard area. One location (Ai)was also proposed for characterizing the extent of deeper(>2 feet bgs) arsenic impacts found at location 12S. 4) The Central Area (Al -Ap)— included areas within the Apex soil removal area where arsenic-impacted soil was not fully removed and remains un- capped a. Central Tree Area (Al, Am, and Ao)— included an area on the central portion of the property where arsenic-affected soil was not removed in order to preserve mature trees. Based on arsenic impacts detected below 3 feet bgs at nearby location 28S, one location (Al) was also for characterizing the vertical extent of Supplemental Site Investigation Page 7 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 HAHN AND ASSOCIATES, INC arsenic impacts in this area. Sample location Ao was added at the request of DEQ. b. Pine Tree Area (An and Ap)— included an area just south of the library building where arsenic-affected soil was apparently not removed in order to preserve a mature pine tree. Sample location Ap was added at the request of DEQ. Generally, three depth discrete soil samples (from depths of 0-1, 1-2, and 2- 3 feet below pre-development grade) were collected from each of the sampling locations. At 10 locations, a fourth depth discrete soil sample (3-4 feet below pre-development grade) was also collected. At location Ac, samples were collected to an approximate depth of 6 feet below pre- development grade. Deviations from the Work Plan are discussed in Section 4.6. Soil samples were collected from each of the four locations at the margin of the pond. No in-water pond sediment samples were collected. Some areas of the site, predominantly in the southwest and central portions of the property, were filled with imported soil during site grading for the library construction. Sample depths in the fill areas were adjusted to account for the fill thicknesses. Sample depth intervals are as stated above with the 0-foot datum being the top of pre-development ground surface. 4.3 Soil Sampling Methods The sample holes were completed by an HAI field representative using a decontaminated hand auger and/or shovel. Soil samples were collected from 1-foot intervals. Upon collection, each sample was placed immediately into a laboratory supplied 4-ounce glass jar and capped with a teflon-lined lid. The sample jars were then labeled and transferred to a chilled, thermally-insulated container for shipment to the project analytical laboratory. Standard sampling protocols, including the use of chain-of-custody documentation, were implemented for all sampling procedures. Following completion of sampling at each location, each hole was backfilled with the soil cuttings from that boring location. At locations where fill material has been placed over native soil (i.e., southwest corner and previous excavation areas), the fill material was segregated and placed back in the hole atop the underlying native material. Supplemental Site Investigation Page 8 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 Wi sk ,hrw N' p e,0 docc HAHN AND ASSOCIATES, INC All reusable soil sampling equipment was decontaminated after each sample using a detergent solution wash, followed by two potable water rinses. 4.4 Analytical Testing Program The 2006 soil samples were submitted to Test America, an Oregon-certified analytical laboratory located in Beaverton, Oregon for analytical testing. A total of 134 soil samples (including duplicates) were analyzed for total arsenic using U.S. Environmental Protection Agency (EPA) Test Method 6010. Soil samples from each location were generally analyzed in a staged approach with the two shallowest samples analyzed first. If arsenic was detected in a shallow sample from a given location, sequentially deeper samples were then analyzed. If arsenic was not detected above the background concentration of 7.0 mg/kg no additional samples from that location were analyzed. The laboratory analytical reports and chain of custody documentation are included in Appendix A. Testing results are summarized in Table 1. 4.5 Quality Assurance and Quality Control Quality assurance (QA) and quality control (QC) measures were implemented to ensure that samples collected during investigation activities are as representative of field conditions as possible. Field QA measures including the following were implemented during investigation activities: 1) new disposable or decontaminated reusable sampling equipment was used to minimize the potential for cross- contamination between samples; 2) samples were placed in laboratory supplied sample containers that were labeled with sample and project specific information; and 3) chain-of-custody documentation for all samples were maintained at all times. Field QC measures included the collection of 6 field duplicate soil samples. Each sample (the original and the duplicate) was given a distinct identification/label. Four of the six duplicate samples showed a relative percent difference (RPD) of less than 22% between the original and duplicate sample. Two other duplicate samples showed RPDs of 27% (sample 365) and 70% (sample 380). The average RPD was 23.7%, a level Supplemental Site Investigation Page 9 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 Sk,,i; doc: HAHN AND ASSOCIATES,INC not atypical for soil sampling projects. The higher of the original and duplicate result for each duplicate soil sample was used for posting, plotting, and screening purposes. Laboratory QC measures for this project involved standard EPA QC guidelines as described in Test Methods for Evaluating Solid Wastes - Physical/Chemical Methods (SW-846), and therefore are not repeated here. Laboratory QC included calibration standards, laboratory control samples, reagent blanks, matrix spikes, matrix spike duplicates, surrogate spikes, and laboratory blanks and duplicates. Laboratory QC results are included in the laboratory reports provided in Appendix A. Although some flags were noted for laboratory QC measures, none were of a nature that would affect the usability of the data. 4.6 Deviations from the Work Plan The following items are noted to be deviations from the April 2006 Work Plan: • Due to difficult hand augering conditions and time constraints, the soil samples proposed to be collected from the 3-to 4-foot bgs interval at locations I, K, and Z were not collected. However, since in each of these cases the vertical extent of arsenic impact was defined with the existing samples, this deviation from the work plan did not cause difficulty with meeting the objectives of the project. • Due to refusal encountered at approximately 1-foot below pre- development ground surface at and in the immediate vicinity of sample locations Ag and Ai (4.5 and 4.0 feet below current grade, respectively, based on the thickness of overlying fill material), deeper samples were not collected from these locations. Because of this, the objective of collecting soil samples for characterizing the extent of deeper(>2 feet bgs) arsenic impacts at location 12S was not met at these for locations Ag and Ai. However, this objective was met at a third location (Ah), allowing for a general characterization of deeper impacts at location 12S. Supplemental Site Investigation Page 10 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 '486 ;i ,h'v Rep)rl dc3c HAHN AND ASSOCIATES, INC 5.0 RESULTS AND DISCUSSION The following sections present the screening levels, results, and screening evaluation of the analytical testing for the near-surface soil sampling activities. Analytical data is summarized in Table 1. 5.1 Screening Levels To provide a framework for evaluating the significance of the testing results, soil analytical data were compared to human health and ecological risk- based concentrations for arsenic, as well as the DEQ's default background concentration. Specifically, the arsenic data were compared to the DEQ Default Background Concentrations for Metals (October 2002) of 7 mg/kg. Because risk-based screening levels for human health (residential and occupational) are below background levels, the screening level for occupational receptors at the site defaults to the 7-mg/kg background value. The second human health screening level utilized for the site was that for construction worker exposure. DEQ recently updated their table of Risk- Based Concentrations (RBCs) (September 2006)to include RBCs for arsenic. The Construction Worker RBC for arsenic is 13 mg/kg. Since the library site will not be used for residential purposes in the foreseeable future, screening against residential RBCs was not conducted. Since much of the site is utilized as a open space/park, an additional human receptor to be considered is that of a park user. Generic RBCs are not established for a park user or a library user (i.e. visitor). Calculation of a site-specific risk-screening level for a park or library visitor was beyond the scope of this project. For terrestrial ecological exposure, the DEQ Level II Screening Level Values (SLVs)were utilized for screening purposes. The lowest DEQ SLVs for arsenic are for plants and birds (10 mg/kg). Based on the assumption that threatened and endangered species are not likely to be exposed to site soils, a screening value equivalent to 5 times the lowest (most conservative) DEQ SLV (i.e. 50 mg/kg) was used for terrestrial receptors. The reference levels discussed above are listed on Table 1 for initial screening purposes. Exceeding one of the screening levels does not necessarily mean that cleanup is required or necessary, but would suggest the need for further evaluation or remedial action. Only upon completion of Supplemental Site Investigation Page 11 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 zi486 Sup h'v Report tloc HAHN AND ASSOCIATES, INC the full risk evaluation, where reasonably-likely land and water uses, site- specific factors, and complete exposure pathways are considered, is it determined whether unacceptable risks to human health or the environment are present that require corrective action. 5.2 Soil Testing Results The results of soil testing for arsenic are summarized below. Discussion and interpretation of the arsenic testing includes both the historical testing results and the 2006 testing results. The historical and current soil testing results are summarized on Table 1 and posted on Figure 3. Figure 3 also depicts the interpreted magnitude and extent of arsenic in the upper 3 feet of pre- development soil based on the existing data. Figure 5 depicts the areas where arsenic-impacted soil remain exposed following soil removal activities and construction of the library, including affected areas that are capped with pavement or at least 2 feet of clean soil. In general, the 2006 testing results confirmed the conceptual site model that was utilized coming into this round of testing. The data continues to show that the elevated arsenic concentrations are limited to the swales and lower- lying areas of the property with the lateral extent being only slightly greater than previously believed. The 2006 sampling did identify two previously unknown aspects of the arsenic impacts: 1)the arsenic levels in the southerly east-west drainage/swale are of greater magnitude than expected, particularly in the pond area of the southeast portion of the property, and 2) arsenic impacts extended deeper below pre-development grade, and at more locations, than anticipated (to at least 3 feet bgs at many locations, and at least 6 feet bgs at one location, Ac). The greatest magnitude and extent of remaining arsenic impact is located in the southern east/west Swale (Figure 5), and the deeper arsenic impacts appear to be limited to the central portions of the swales. The 2003 Apex removal action addressed most of the arsenic-impacted soil that was located in the central portion of the site in the southwest/northeast trending Swale. The remaining areas of arsenic-affected soil as shown on Figure 5 are discussed below. Northern Area The 2003 Apex removal action essentially isolated a northern area of arsenic impact in the Swale and northern flood plain area, hereafter referred to as the Northern Area (Figure 5). The maximum detected arsenic concentration in Supplemental Site Investigation Page 12 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 6486 Sup Inv Repx.rl do,,' HAHN AND ASSOCIATES,INC this area is 40.7 mg/kg (location M at 2-3 feet bgs). The Northern Area comprises an area of approximately 1.1 acres. Tree Areas Two relatively small areas of arsenic impact in the central portion of the site, comprising less than 0.1 acres, were not removed by Apex in 2003 in order to preserve mature trees in these areas. The maximum detected arsenic concentration in the Central Tree area is 54.3 mg/kg (location An at 2-3 feet bgs). The maximum detected arsenic concentration in the Pine Tree area is 25.5 mg/kg (location AD at 1-2 feet bgs). Southwest Margin A small area (0.02 acres)of relatively low-level arsenic impact (maximum concentration 9.37 mg/kg) was left in-place at the southwest margin of the 2003 Apex soil removal area. Southern Area The largest area of arsenic impact at the site is located at the southern east/west trending swale/drainage and flood plain area, including the on-site pond area at the southeast portion of the property. This area of arsenic impact extends onto the Wall Street right-of-way to the south, as well as possibly onto the northwesterly portion of the Fanno Point Condominium property further to the southwest. The highest arsenic concentrations at the site are located in the Southern Area, particularly in the low-lying flood plain area surrounding the on-site pond. Detected arsenic concentrations in the pond area included 96.2 mg/kg at location S (0-1 feet bgs), 101 mg/kg at location Y (2-3 feet bgs), and 113 mg/kg at location W(0-1 feet bgs). High arsenic concentrations were also identified at the western end of the Southern Area (110 mg/kg at location 12S at 2.8 feet bgs). Arsenic impacts were left in-place beneath the Apex 2003 soil removal area in this portion of the site, but are now capped with pavement and/or at least 2 feet of clean fill (Figure 5). The deepest arsenic impacts below pre-development grade were found in the western end of the Southern Area. Elevated arsenic was found at pre- development depths of at least 5-6 feet bgs at location Ac (26.8 mg/kg). The deep arsenic impacts appear to be isolated to historic low-lying areas that Supplemental Site Investigation Page 13 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 8k'St'p h1v Rr x r+d"v' HAHN AND ASSOCIATES, INC have been naturally or artificially filled over time, such as within possible channels of historic creeks or ditches. Extent of Arsenic Impacts The lateral extent of arsenic impacts appears to be adequately delineated on the subject property. However, it is not clear to what extent arsenic- impacted soil may be present south of the Wall Street right-of-way beyond the southwest portion of the study area. Pre-2005 delineation efforts focused on the depth interval of 0-1 feet bgs. Although it has since been shown that elevated arsenic levels (>7 mg/kg) may be present at depths below 1 foot bgs, while the upper foot of soil contains arsenic levels below 7 mg/kg, this phenomena has only been observed to occur in the low-lying or Swale areas of the property. Accordingly, it is believed that lateral definition of arsenic occurrence is adequate utilizing existing data. Vertical delineation of the arsenic impacts has been demonstrated at many areas of the site with arsenic dropping below 7 mg/kg typically within the upper 2 to 3 feet of soil. In the central portion of the southerly east/west trending Swale, arsenic impacts appear to extend to depths greater than 3 feet bgs, with elevated arsenic found at a pre-development depth of 6 feet bgs at location Ac (26.8 mg/kg). There are a number of sample locations where elevated arsenic appears to extend below depths of 3 feet bgs and an increasing trend is still observed (i.e. vertical delineation cannot be projected at that location). These locations where vertical extent cannot be projected are predominantly in the Southern Area (locations R, T, X, Y, Ac, and 12S), with one location in the northern flood plain (F). 5.3 Preliminary Risk Screening For the purpose of preliminary risk screening, the identified receptors that could be exposed to arsenic-affected soil at the property include: • Library workers (i.e. occupational receptors) • Library visitors who venture outside • Hypothetical future construction workers • Open space or park users • Terrestrial ecological receptors. Supplemental Site Investigation Page 14 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 6486 Sup,Jry R"-E,arf duc HAHN AND ASSOCIATES, INC For each of these receptors, possible exposure would be through direct contact (i.e. dermal contact, ingestion, and/or inhalation). Established screening levels (i.e. DEQ RBCs or SLVs) exist for direct contact for occupational, construction worker, and terrestrial ecological receptors, as follows: • For the occupational receptor, the screening level defaults to the background level of 7 mg/kg • The DEQ RBC for a construction worker scenario is 13 mg/kg, which assumes a 250-day construction project. The screening level would increase for a construction project of shorter duration. For example, a 50-day construction project involving daily contact with the arsenic- affected soil would yield a site-specific RBC of 66 mg/kg • As discussed in Section 5.1, based on the assumption that threatened and endangered species are not likely to be exposed to site soils, a screening value equivalent to 5 times the lowest (most conservative) DEQ SLV (i.e. 50 mg/kg)was used for terrestrial ecological receptors. The interpreted areas of arsenic-affected soil exceeding the three primary screening levels (i.e. 7, 13, and 50 mg/kg) are shown on Figure 5. Generic screening levels are not established for visitors or park users, as these would typically be established through a site-specific risk assessment, which was beyond the scope of this project. Use of the default background level (7 mg/kg) can be used as a first cut for screening for these receptors. As observed on Figure 5, it is clear that there are large areas of the property (approximately 3.1 acres)where the upper 3 feet of uncapped soil is interpreted to contain arsenic at concentrations greater than 7 mg/kg. What this screening suggests is that if a library worker were to utilize the identified areas on a daily basis over the course of 25 years then there could be a potential unacceptable risk to human health. Given that library workers would only utilize the affected areas possibly on breaks, and that the affected areas are not designed for everyday human use, the above scenario causing an unacceptable risk appears unlikely. Further risk evaluation of this pathway, incorporating site-specific factors, may be warranted to confirm this supposition. Supplemental Site Investigation Page 15 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 '348f Sup Inv Re,r nrt doc HAHN AND ASSOCIATES, INC Figure 5 also shows a relatively large area of the site (approximately 1.9 acres) where the upper 3 feet of uncapped soil is interpreted to contain arsenic at concentrations greater than the 13-mg/kg construction worker screening level. This suggests that if a construction worker were to work within the identified areas on a daily basis for a 250-day project then there could be a potential unacceptable risk to human health. Since a possible Wall Street Extension construction project is slated for an area covering much of the Southern Area, further risk evaluation of this pathway appears warranted to incorporate site-specific factors. An approximate 0.3-acre area is interpreted to contain arsenic in the upper 3 feet of soil at concentrations greater than the 50-mg/kg terrestrial ecological screening level. A Level I/Level II Ecological Risk Assessment should be conducted to identify ecological receptors at the site, and to determine if the arsenic-affected soil would in fact pose a risk to the identified ecological receptors. Further evaluation of the library user and park user exposure scenarios, incorporating site-specific factors, is also recommended. Supplemental Site Investigation Page 16 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 64M Sup iry Rc,Por! doc HAHN AND ASSOCIATES, INC 6.0 LIMITATIONS AND SIGNATURES The information presented in this report was collected, analyzed, and interpreted following the standards of care, skill, and diligence ordinarily provided by a professional in the performance of similar services as of the time the services were performed. This report and the conclusions and/or recommendations contained in it are based solely upon research and/or observations, and physical sampling and analytical activities that were conducted. The information presented in this report is based only upon activities witnessed by HAI or its contractors, and/or upon information provided to HAI by the Client and/or its contractors. The analytical data presented in this report document only the concentrations of the target analytes in the particular sample. Unless otherwise specified in writing, this report has been prepared solely for the use by the Client and for use only in connection with the evaluation of the subject property. Any other use by the Client or any use by any other person shall be at the user's sole risk, and HAI shall have neither liability nor responsibility with respect to such use. Hahn and Associates, Inc. Prepared by: Jclimem 1ftt?-tnr��- � May 31,2007 Roger E. Brown, R.G. Principal Date October 27, 2006 Supplemental Site Investigation Page 17 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 a ,; ,,Ire-,ff t e Prrt ec HAHN AND ASSOCIATES,INC 7.0 GLOSSARY OF ABBREVIATIONS Apex Apex Environmental Consulting Services, Inc. bgs below pre-development ground surface DEQ Oregon Department of Environmental Quality EPA U.S. Environmental Protection Agency HAI Hahn and Associates, Inc. mg/kg milligrams/kilogram ppm parts per million QA Quality assurance QC Quality control RBCs DEQ Risk-Based Concentrations RPD relative percent difference SLVs DEQ Level II Ecological Screening Level Values Supplemental Site Investigation Page 18 of 18 Tigard Library, 13500 SW Hall Boulevard,Tigard, Oregon October 27,2006 iA8e3. t =w �, <ri r.'ex: HAHN AND ASSOCIATES,INC TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number 1.2 Depth Interval Disposition mg/kg(ppm) (feet bgs) (In-Place or Total Arsenic Removed) by EPA 6010 Default Background 3 Construction Worker Screening Level° 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)5=_> 50. Pre-Development Testin (2002,2003 ' N Swale 003 HAI 5-Sep-02 020905-003 0.25 - 1.5 In-Place 18.7 N Flood Plain 004 HAI 5-Sep-02 020905-004 0.25 - 1.5 In-Place 26.1 N of Fanno Creek 009 HAI 5-Sep-02 020905-009 0.25 - 1.5 In-Place 2. U N of Fanno Creek 010 HAI 5-Sep-02 020905-010 0.25 - 1.5 In-Place 2.64 N Field 011 HAI 5-Sep-02 020905-001,-0026 0.25 - 1.5 In-Place 2.83 N Swale 012 HAI 5-Sep-02 020905-003,-004 6 0.25 - 1.5 In-Place 21.5 Library 013 HAI 5-Sep-02 020905-005,-006 6 0.25 - 1.5 006 Removed 9.07 N Field 014 HAI 5-Sep-02 020905-007,-008 6 0.25 - 1.5 In-Place 2. U Libra SS-1 HAI 8-Jan-03 030108-015 0.0 - 0.25 Removed 10.7 Libra SS-1 HAI 8-Jan-03 030108-016 0.25 - 0.5 Removed 4.41 Libra SS-1 HAI 8-Jan-03 030108-017 0.5 - 0.75 Removed Libra SS-1 HAI 8-Jan-03 030108-018 0.75 - 1.0 Removed 3.37 Libra SS-1 HAI 8-Jan-03 030108-019 1.0 - 1.5 Removed 4.94 Libra SS-1 HAI 8-Jan-03 030108-020 1.5 - 2.0 Removed 17.4 Libra SS-1 HAI 8-Jan-03 030108-021 2.0 - 2.5 In-Place 1.85 U Libra SS-1 HAI 8-Jan-03 030108-022 2.5 - 3.0 In-Place 2. U N Flood Plain SS-2 HAI 8-Jan-03 030108-023 0.0 - 0.25 In-Place 2.41 N Flood Plain SS-2 HAI 8-Jan-03 030108-024 0.25 - 0.5 In-Place 4.42 N Flood Plain SS-2 HAI 8-Jan-03 030108-025 0.5 - 0.75 In-Place 2. U N Flood Plain SS-2 HAI 8-Jan-03 030108-026 0.75 - 1.0 In-Place 5.41 N Flood Plain SS-2 HAI 8-Jan-03 030108-027 1.0 - 1.5 In-Place 5.16 N Flood Plain SS-2 HAI 8-Jan-03 030108-028 1.5 - 2.0 In-Place 10.2 N Flood Plain SS-2 HAI 8-Jan-03 030108-029 2.0 - 2.5 In-Place 1.85 U N Flood Plain SS-2 HAI 8-Jan-03 030108-030 2.5 - 3.0 In-Place 2. U Libra SS-3 HAI 6-Feb-03 030206-031 0.0 - 1.0 In-Place 2.08 U Libra SS-4 HAI 6-Feb-03 030206-033 0.0 - 1.0 Removed 33.3 Libra SS-4 HAI 6-Feb-03 030206-034 1.0 - 2.0 Removed? 15.7 Libra SS-5 HAI 6-Feb-03 030206-035 0.0 - 1.0 In-Place 2. U Libra SS-6 HAI 6-Feb-03 030206-037 0.0 - 1.0 In-Place 1.85 U S Flood Plain SS-7 HAI 6-Feb-03 030206-039 0.0 - 1.0 In-Place 11. S Flood Plain SS-7 HAI 6-Feb-03 030206-040 1.0 - 2.0 In-Place 11.2 Libra SS-8 HAI 7-Feb-03 030207-041 0.0 - 1.0 In-Place 2.12 Libra SS-9 HAI 7-Feb-03 030207-043 0.0 - 1.0 Removed 12.2 Libra SS-9 HAI 7-Feb-03 030207-044 1.0 - 2.0 In-Place 2.76 Libra SS-10 HAI 7-Feb-03 030207-045 0.0 - 1.0 In-Place 1.85 U Libra SS-11 HAI 7-Feb-03 030207-047 0.0 - 1.0 In-Place 1.72 U Libra SS-12 HAI 7-Feb-03 030207-049 0.0 - 1.0 In-Place 1.85 U Libra SS-13 HAI 7-Feb-03 030207-051 0.0 - 1.0 In-Place 2.94 Libra SS-14 HAI 7-Feb-03 030207-053 0.0 - 1.0 In-Place 6.84 Libra SS-15 HAI 7-Feb-03 030207-055 0.0 - 1.0 Removed 36.6 Libra SS-15 HAI 7-Feb-03 030207-056 1.0 - 2.0 Removed 15.4 Libra SS-16 HAI 7-Feb-03 030207-057 0.0 - 1.0 In-Place 4.24 Libra SS-17 HAI 7-Feb-03 030207-059 0.0 - 1.0 In-Place 2.16 Libra SS-18 HAI 7-Feb-03 030207-061 0.0 - 1.0 In-Place 1.85 U Site Investigation Page 1 of 8 Tigard Library,Tigard,Oregon Updated: 10/7/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number'.2 Depth Interval Disposition mg/kg(ppm) (feet bgs) (In-Place or Total Arsenic Removed) by EPA 6010 Default Background 3=_> 7. Construction Worker Screening Level° 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)a=_> 50. N Field SS-19 HAI 7-Feb-03 030207-063 0.0 - 1.0 In-Place 1.92 U N Field SS-20 HAI 7-Feb-03 030207-065 0.0 - 1.0 In-Place 2.26 Libra SS-21 HAI 7-Feb-03 030207-067 0.0 - 1.0 In-Place 1.85 U Libra SS-22 HAI 7-Feb-03 030207-069 0.0 - 1.0 In-Place 1.92 U Libra SS-23 HAI 7-Feb-03 030207-071 0.0 - 1.0 In-Place 1.85 U Libra SS-23 HAI 7-Feb-03 030207-072 1.0 - 2.0 In-Place 1.92 U Libra SS-24 HAI 7-Feb-03 030207-073 0.0 - 1.0 In-Place 4.46 Libra SS-25 HAI 7-Feb-03 030207-075 0.0 - 1.0 Removed 23.4 Libra SS-25 HAI 7-Feb-03 030207-076 1.0 - 2.0 Removed 8.89 N Field SS-26 HAI 7-Feb-03 030207-077 0.0 - 1.0 In-Place 8.74 N Field SS-26 HAI 7-Feb-03 030207-078 1.0 - 2.0 In-Place 4.59 N Field SS-27 HAI 7-Feb-03 030207-079 0.0 - 1.0 In-Place 1.85 U N Field SS-28 HAI 9-Feb-03 030209-081 0.0 - 1.0 In-Place 2.23 N Field SS-29 HAI 9-Feb-03 030209-083 0.0 - 1.0 In-Place 4.85 N Field SS-30 HAI 9-Feb-03 030209-085 0.0 - 1.0 In-Place 1.98 N Field SS-31 HAI 9-Feb-03 030209-087 0.0 - 1.0 In-Place 1.85 U N Field SS-32 HAI 9-Feb-03 030209-089 0.0 - 1.0 In-Place 2. U N Field SS-32 HAI 9-Feb-03 030209-090 1.0 - 2.0 In-Place 2. U N Field SS-33 HAI 9-Feb-03 030209-091 0.0 - 1.0 In-Place 1.8_5 U N Field SS-33 HAI 9-Feb-03 030209-092 1.0 - 2.0 In-Place 1.92 U N Field SS-34 HAI 9-Feb-03 030209-093 0.0 - 1.0 In-Place 2.06 N Field SS-34 HAI 9-Feb-03 030209-094 1.0 - 2.0 In-Place 2.08 U N Field SS-35 HAI 9-Feb-03 030209-095 0.0 - 1.0 In-Place 2. U N Field SS-36 HAI 9-Feb-03 030209-097 0.0 - 1.0 In-Place 2. U Wall Street ROW SS-37 HAI 8-Apr-03 030408-139 0.0 - 1.0 Removed 17.8 Wall Street ROW SS-38 HAI 8-Apr-03 030408-140 0.0 - 1.0 Removed 11. Wall Street ROW SS-39 HAI 8-Apr-03 030408-141 0.0 - 1.0 In-Place 1.85 U Wall Street ROW SS-40 HAI 8-Apr-03 030408-142 0.0 - 1.0 In-Place 1.92 U Wall Street ROW SS-41 HAI 8-Apr-03 030408-143 0.0 - 1.0 In-Place 2.08 U S Swale SS-42 HAI 8-Apr-03 030408-138 0.0 - 1.0 Removed 29.6 S Swale SS-43 HAI 8-Apr-03 030408-136 0.0 - 1.0 Removed 10.7 S Swale SS-44 HAI 8-Apr-03 030408-133 0.0 - 1.0 Removed 14.5 S Swale SS-44 HAI 8-Apr-03 030408-134 1.0 - 2.0 Removed 6.47 S Swale SS-44 HAI 8-Apr-03 030408-135 2.0 - 3.0 In-Place? 10.2 S Swale SS-45 HAI 8-Apr-03 030408-131 0.0 - 1.0 In-Place 7.74 S Swale SS-46 HAI 8-Apr-03 030408-129 0.0 - 1.0 In-Place 10.2 Libra SS-47 HAI 8-Apr-03 030408-121 0.0 - 1.0 Removed 9.36 Libra SS-48 HAI 8-Apr-03 030408-122 0.0 - 1.0 Removed Libra SS-48 HAI 8-Apr-03 030408-123 1.0 - 2.0 Removed 48.2 Libra SS-49 HAI 8-Apr-03 030408-124 0.0 - 1.0 Removed 4.15 Libra SS-50 HAI 8-Apr-03 030408-126 0.0 - 1.0 In-Place 4.72 Libra SS-51 HAI 8-Apr-03 030408-128 0.0 - 1.0 In-Place 3.89 S Flood Plain SS-52 HAI 7-Apr-03 030407-120 0.0 - 1.0 In-Place 7.62 Libra SS-53 HAI 7-Apr-03 030407-110 0.0 - 1.0 Removed 7.83 Libra SS-54 HAI 7-Apr-03 030407-111 0.0 - 1.0 Removed 27.3 Libra SS-54 HAI 7-Apr-03 030407-112 1.0 - 2.0 Removed 31.4 Site Investigation Page 2 of 8 Tigard Library,Tigard,Oregon Updated: 10/7/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number" Depth Interval Disposition mg/kg(ppm) (feet bgs) (In-Place or Total Arsenic Removed) by EPA 6010 Default Background 3=_> 7. Construction Worker Screening Level 4 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)s=_> 50. Libra SS-55 HAI 7-Apr-03 030407-113 0.0 - 1.0 Removed 22. Libra SS-55 HAI 7-Apr-03 030407-114 1.0 - 2.0 Removed 8.2 Libra SS-55 HAI 7-Apr-03 030407-115 2.0 - 3.0 In-Place 5.68 Libra SS-56 HAI 7-Apr-03 030407-116 0.0 - 1.0 In-Place 4.57 Libra SS-57 HAI 7-Apr-03 030407-118 0.0 - 1.0 In-Place 3.23 Libra SS-58 HAI 7-Apr-03 030407-119 0.0 - 1.0 In-Place 2.26 Libra SS-59 HAI 7-Apr-03 030407-108 0.0 - 1.0 Removed Libra SS-59 HAI 7-Apr-03 030407-109 1.0 - 2.0 Removed 18.4 Libra SS-60 HAI 7-Apr-03 030407-106 0.0 - 1.0 In-Place 8.02 Libra SS-61 HAI 7-Apr-03 030407-104 0.0 - 1.0 In-Place 7.38 Libra SS-62 HAI 7-Apr-03 030407-103 0.0 - 1.0 In-Place 3. S Flood Plain SS-63 HAI 7-Apr-03 030407-102 0.0 - 1.0 In-Place 6.75 Libra SS-64 HAI 7-Apr-03 030407-099 0.0 - 1.0 In-Place 4.17 Libra SS-65 HAI 7-Apr-03 030407-100 0.0 - 1.0 Removed 6.71 Libra SS-66 HAI 7-Apr-03 030407-101 0.0 - 1.0 In-Place 1.92 U Apex Confirmation Samples 2003 2 Soil Removal Area 1S Apex 17-Jul-03 1S 0.0 - 1.0 Removed 14. Soil Removal Area 1S Apex 21-Jul-03 4S 0.0 - 2.0 In-Place 4.8 Soil Removal Area 2S Apex 17-Jul-03 2S 0.0 - 2.0 In-Place 4. Soil Removal Area 3S Apex 17-Jul-03 3S 0.0 - 2.0 In-Place 5. Soil Removal Area 5S Apex 21-Jul-03 5S 0.0 - 1.5 In-Place 6. Soil Removal Area 6S Apex 22-Jul-03 6S 0.0 - 1.5 Removed 8. Soil Removal Area 6S Apex 25-Jul-03 12S 0.0 - 2.8 In-Place Soil Removal Area 6S Apex 25-Jul-03 12S Du 0.0 - 2.8 In-Place Soil Removal Area 7S Apex 22-Jul-03 7S 0.0 - 1.5 Removed 10. Soil Removal Area 7S Apex 25-Jul-03 14S 0.0 - 2.8 In-Place 2. Soil Removal Area 8S Apex 24-Jul-03 8S 0.0 - 1.5 In-Place 6. Soil Removal Area 9S Apex 24-Jul-03 9S 0.0 - 1.5 Removed 41. Soil Removal Area 9S Apex 30-Jul-03 24S 0.0 - 2.3 Removed? 25. Soil Removal Area 9S Apex 1-Aug-03 29S ?? - ?? In-Place 1.7 Soil Removal Area 10S Apex 25-Jul-03 10S 0.0 - 1.5 Removed 21. Soil Removal Area 10S Apex 29-Jul-03 19S 0.0 - 2.5 In-Place 6.5 Soil Removal Area 11S Apex 25-Jul-03 11S 0.0 - 2.5 Removed 15. Soil Removal Area 11S Apex 30-Jul-03 23S 0.0 - 3.3 Removed? 11. Soil Removal Area 11S Apex 1-Aug-03 28S ?? - ?? In-Place 3.4 Soil Removal Area 13S Apex 25-Jul-03 13S 0.0 - 1.7 In-Place 4. Soil Removal Area 15S Apex 25-Jul-03 15S 0.0 - 1.5 In-Place 3. Soil Removal Area 16S Apex 28-Jul-03 16S 0.0 - 1.5 Removed 9.7 Soil Removal Area 16S Apex 30-Jul-03 20S 0.0 - 1.5 In-Place 6.1 Soil Removal Area 17S Apex 28-Jul-03 17S 0.0 - 1.5 Removed 32. Soil Removal Area 17S Apex 30-Jul-03 21S 0.0 - 1.5 In-Place 2.5 Soil Removal Area 18S Apex 28-Jul-03 18S 0.0 - 1.5 Removed 7.4 Soil Removal Area 18S Apex 30-Jul-03 22S 0.0 - 1.5 In-Place 5.9 Soil Removal Area 25S A ex 30-Jul-03 25S 0.0 - 2.5 In-Place 5.4 Soil Removal Area 26S Apex 30-Jul-03 I 26S 0.0 - 1.5 In-Place 6.4 Site Investigation Page 3 of 8 Tigard Library,Tigard,Oregon Updated: 10/7/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number" Depth Interval Disposition mg/kg(ppm) (feet bgs) (In-Place or Total Arsenic Removed) by EPA 6010 Default Background 3=_> 7. Construction Worker Screening Level° 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)5=_> 50. Soil Removal Area 27S Apex 30-Jul-03 27S 0.0 - 1.5 In-Place 6.6 S Swale 30S Apex 14-Aug-03 30S 0.0 - 1.5 In-Place 6. S Swale 31S Apex 14-Aug-03 31S 0.0 - 1.5 In-Place 2. S Swale 32S Apex 14-Aug-03 32S 0.0 - 1.5 In-Place 7. Hall Blvd ROW 004 Apex 25-Jul-03 004 0.5 - In-Place 13. S Swale 005 Apex 25-Jul-03 005 0.5 - In-Place 8. S Swale 006 Apex 25-Jul-03 006 0.5 - in-Place 7. NW Field 007 Apex 25-Jul-03 007 0.5 - In-Place 2. NW Field 008 Apex 25-Jul-03 008 0.5 - In-Place 2. Bike Path Investi ation 2005 Bike Path S1 HAI 23-Sep-05 S1a 0.0 - 0.5 In-Place 2. U Bike Path S1 HAI 23-Sep-05 S1b 0.5 - 1.5 In-Place 3.14 Bike Path S1 HAI 23-Sep-05 S1c 1.5 - 2.0 In-Place 2. U Bike Path S2 HAI 23-Sep-05 S2a 0.0 - 0.5 In-Place 4.5 Bike Path S2 HAI 23-Sep-05 S2b 0.5 - 1.5 In-Place 4.13 Bike Path S2 HAI 23-Sep-05 S2c 1.5 - 2.0 In-Place 2. U Bike Path S3 HAI 23-Sep-05 S3a 0.0 - 0.5 In-Place 4.19 Bike Path S3 HAI 23-Sep-05 S3b 0.5 - 1.5 In-Place 2.88 Bike Path S3 HAI 23-Sep-05 S3c 1.5 - 2.0 In-Place 3.05 Bike Path S4 HAI 23-Sep-05 S4a 0.0 - 0.5 In-Place 1.79 U Bike Path S4 HAI 23-Sep-05 S4b 0.5 - 1.5 In-Place 6.27 Bike Path S4 HAI 23-Sep-05 S4c 1.5 - 2.0 In-Place 1.82 U Bike Path S5 HAI 23-Sep-05 S5a 0.0 - 0.5 In-Place 5.33 Bike Path S5 HAI 23-Sep-05 S5b 0.5 - 1.5 In-Place 5.35 Bike Path S5 HAI 23-Sep-05 S5c 1.5 - 2.0 In-Place 6.92 Bike Path S6 HAI 23-Sep-05 S6a 0.0 - 0.5 Removed 9.05 Bike Path S6 HAI 23-Sep-05 S6b 0.5 - 1.5 Removed 17.2 Bike Path S6 HAI 23-Sep-05 S6c 1.5 - 2.0 Removed 11.3 Bike Path S6 HAI 13-Oct-05 S14-2025 2.0 - 2.5 Removed 7.45 Bike Path S6 HAI 13-Oct-05 S14-2530 2.5 - 3.0 In-Place 6.17 Bike Path S7 HAI 23-Sep-05 S7a 0.0 - 0.5 In-Place 3.71 Bike Path S7 HAI 23-Sep-05 S7b 0.5 - 1.5 In-Place 3.03 Bike Path S7 HAI 23-Sep-05 S7c 1.5 - 2.0 In-Place 2.88 Bike Path S8 I HAI 23-Sep-05 S8a 0.0 - 0.5 In-Place 3.39 Bike Path S8 HAI 23-Sep-05 S8b 0.5 - 1.5 In-Place 3.13 Bike Path S8 HAI 23-Sep-05 S8c 1.5 - 2.0 In-Place 2.65 Bike Path S9 HAI 23-Sep-05 S9a 0.0 - 0.5 In-Place 4.56 Bike Path S9 HAI 23-Sep-05 S9b 0.5 - 1.5 In-Place 5.41 Bike Path S9 HAI 23-Sep-05 S9c 1.5 - 2.0 In-Place 5.01 Bike Path S10 HAI 23-Sep-05 S10a 0.0 - 0.5 In-Place 2.44 Bike Path S10 HAI 23-Sep-05 S10b 0.5 - 1.5 In-Place 4.49 Bike Path S10 HAI 23-Sep-05 S10c 1.5 - 2.0 In-Place 4.14 Bike Path S11 HAI 23-Sep-05 S11a 0.0 - 0.5 In-Place 2.58 Bike Path S11 HAI 23-Sep-05 S11b 0.5 - 1.5 In-Place 3.52 Bike Path S11 HAI 23-Sep-05 S11c 1.5 - 2.0 In-Place 3.59 Site Investigation Page 4 of 8 Tigard Library,Tigard,Oregon Updated: 10/7/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number' Z Depth Interval Disposition mg/kg(ppm) (feet bgs) (in-Place or Total Arsenic Removed) by EPA 6010 Default Background 3=_> 7. Construction Worker Screening Level° 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)5=_> 50. Bike Path S12 HAI 23-Sep-05 S12a 0.0 - 0.5 In-Place 3.08 Bike Path S12 HAI 23-Sep-05 S12b 0.5 - 1.5 In-Place 4.2 Bike Path S12 HAI 23-Sep-05 S12c 1.5 - 2.0 In-Place 2.86 Bike Path S13 HAI 23-Sep-05 S13a 0.0 - 0.5 In-Place 5.32 Bike Path S13 HAI 23-Sep-05 S13b 0.5 - 1.5 In-Place 8.46 Bike Path S13 HAI 13-Oct-05 S17-0515 0.5 - 1.5 In-Place 8.58 Bike Path S13 HAI 23-Sep-05 S13c 1.5 - 2.0 In-Place 6.5 Bike Path S15 HAI 13-Oct-05 S15-010 0.0 - 1.0 Removed 13.3 Bike Path S15 HAI 13-Oct-05 S15-1020 1.0 - 2.0 Removed 5.96 Bike Path S15 HAI 13-Oct-05 S15-2025 2.0 - 2.5 Removed 8.15 Bike Path S15 HAI 13-Oct-05 S15-2530 2.5 - 3.0 In-Place 4.33 Bike Path S16 HAI 13-Oct-05 S16-010 0.0 - 1.0 Removed 23.8 Bike Path S16 HAI 13-Oct-05 S16-1020 1.0 - 2.0 Removed 28.6 Bike Path S16 HAI 13-Oct-05 S16-2025 2.0 - 2.5 Removed 29. Bike Path S16 HAI 13-Oct-05 S16-2530 2.5 - 3.0 Removed 20.8 Bike Path S16 HAI 13-Oct-05 S16-3035 3.0 - 3.5 Removed 11. Bike Path S16 HAI 11-Nov-05 S16-B 3.0 - 3.5 In-Place 2.55 Bike Path S18 HAI 13-Oct-05 S18-010 0.0 - 1.0 In-Place 6.58 Bike Path S18 HAI 13-Oct-05 S18-1020 1.0 - 2.0 In-Place 6.85 Bike Path S18 HAI 13-Oct-05 S18-2030 2.0 - 3.0 In-Place 4.14 Bike Path S19 HAI 13-Oct-05 S19-010 0.0 - 1.0 Removed 23.9 Bike Path S19 HAI 13-Oct-05 S19-1020 1.0 - 2.0 Removed 3.21 Bike Path S19 HAI 13-Oct-05 S19-2030 2.0 - 3.0 Removed 16.9 Bike Path S19 HAI 11-Nov-05 S19-B 3.0 - 3.5 In-Place 2.68 Site-Wide Supple ntal Investigation 2006 N Flood Plain A HAI 12-Ma -06 6486-060512-256 0.0 - 1.0 In-Place 6.47 N Flood Plain A HAI 12-May-06 6486-060512-257 1.0 - 2.0 In-Place 9.34 N Flood Plain A HAI 12-May-06 6486-060512-258 2.0 - 3.0 In-Place 7.26 N Flood Plain B HAI 12-May-06 6486-060512-259 0.0 - 1.0 In-Place 13.8 N Flood Plain B HAI 12-May-06 6486-060512-260 1.0 - 2.0 In-Place 15.4 N Flood Plain B HAI 12-May-06 6486-060512-261 2.0 - 3.0 In-Place 5.42 N Flood Plain C HAI 12-May-06 6486-060512-262 0.0 - 1.0 In-Place 4.86 N Flood Plain C HAI 12-May-06 6486-060512-263 1.0 - 2.0 In-Place 44. N Flood Plain C HAI 12-May-06 6486-060512-264 2.0 - 3.0 In-Place 7.99 N Flood Plain D HAI 12-May-06 6486-060512-265 0.0 - 1.0 In-Place 4.46 N Flood Plain D HAI 12-May-06 6486-060512-266 1.0 - 2.0 In-Place 30.2 N Flood Plain D HAI 12-May-06 6486-060512-267 2.0 - 3.0 In-Place 7.01 N Flood Plain E HAI 15-May-06 6486-060515-369 0.0 - 1.0 In-Place 10.2 N Flood Plain E HAI 15-May-06 6486-060515-370 1.0 - 2.0 in-Place 4.22 N Flood Plain F HAI 15-May-06 6486-060515-376 0.0 - 1.0 In-Place 5.55 N Flood Plain F HAI 15-May-06 6486-060515-377 1.0 - 2.0 In-Place 8.64 N Flood Plain F HAI 15-May-06 6486-060515-378 2.0 - 3.0 In-Place 11.2 N Flood Plain G HAI 15-May-06 6486-060515-373 0.0 - 1.0 In-Place 7.86 N Flood Plain G HAI 15-May-06 6486-060515-374 1.0 - 2.0 In-Place 22.8 N Flood Plain G HAI 15-May-06 6486-060515-375 2.0 - 3.0 In-Place 9.64 N Swale H HAI 15-May-06 6486-060515-357 0.0 - 1.0 In-Place 32.8 Site Investigation Page 5 of 8 Tigard Library,Tigard,Oregon Updated: 1017/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number',' Depth Interval Disposition mg/kg(ppm) (feet bgs) (In-Place or Total Arsenic Removed) by EPA 6010 Default Background s=_> 7. Construction Worker Screening Level° __> 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)5=_> 50. N Swale H HAI 15-May-06 6486-060515-358 1.0 - 2.0 In-Place 11.2 N Swale H HAI 15-May-06 6486-060515-358b 1.0 - 2.0 In-Place 11. N Swale H HAI 15-May-06 6486-060515-359 2.0 - 3.0 In-Place 5.53 N Swale I HAI 15-May-06 6486-060515-363 0.0 - 1.0 In-Place 6.7 N Swale I HAI 15-May-06 6486-060515-364 1.0 - 2.0 In-Place 30.6 N Swale I HAI 15-May-06 6486-060515-365 2.0 - 3.0 In-Place 6.31 N Swale I HAI 15-May-06 6486-060515-365b 2.0 - 3.0 In-Place 4.83 N Swale J HAI 15-May-06 6486-060515-366 0.0 - 1.0 In-Place 5.06 N Swale J HAI 15-May-06 6486-060515-367 1.0 - 2.0 In-Place 27.6 N Swale J HAI 15-May-06 6486-060515-368 2.0 - 3.0 In-Place 17.1 N Swale K HAI 15-May-06 6486-060515-360 0.0 - 1.0 In-Place 3.78 N Swale K HAI 15-May-06 6486-060515-361 1.0 - 2.0 In-Place 17.2 N Swale K HAI 15-May-06 6486-060515-362 2.0 - 3.0 In-Place 6.36 N Swale L HAI 11-May-06 6486-060511-253 0.0 - 1.0 In-Place 11.9 N Swale L HAI 11-May-06 6486-060511-253b 0.0 - 1.0 In-Place 14.8 N Swale L HAI 11-May-06 6486-060511-254 1.0 - 2.0 In-Place 4.64 N Swale M HAI 11-May-06 6486-060511-246 0.0 - 1.0 In-Place 12.4 N Swale M HAI 11-May-06 6486-060511-247 1.0 - 2.0 In-Place 25.7 N Swale M HAI 11-May-06 6486-060511-248 2.0 - 3.0 In-Place 40.7 N Swale M HAI 11-May-06 6486-060511-249 3.0 - 4.0 In-Place 5.07 N Swale N HAI 11-May-06 6486-060511-250 0.0 - 1.0 In-Place 5.55 N Swale N HAI 11-May-06 6486-060511-251 1.0 - 2.0 In-Place 18.1 N Swale N HAI 11-May-06 6486-060511-252 2.0 - 3.0 In-Place 7.26 S Flood Plain O HAI 15-May-06 6486-060515-379 0.0 - 1.0 In-Place 11.8 S Flood Plain O HAI 15-May-06 6486-060515-380 1.0 - 2.0 In-Place 29.3 S Flood Plain O HAI 15-May-06 6486-060515-380b 1.0 - 2.0 In-Place 14.1 S Flood Plain O HAI 15-May-06 6486-060515-381 2.0 - 3.0 In-Place 7.32 S Flood Plain P HAI 15-May-06 6486-060515-384 2.0 - 3.0 In-Place 6.93 S Flood Plain Q HAI 15-May-06 6486-060515-386 0.0 - 1.0 In-Place 16.9 S Flood Plain Q HAI 15-Ma -06 6486-060515-387 1.0 - 2.0 In-Place 23.3 S Flood Plain Q HAI 15-May-06 6486-060515-388 2.0 - 3.0 In-Place 14.5 S Flood Plain R HAI 15-May-06 6486-060515-389 0.0 - 1.0 In-Place 32.9 S Flood Plain R HAI 15-May-06 6486-060515-390 1.0 - 2.0 In-Place 24.7 S Flood Plain R HAI 15-May-06 6486-060515-391 2.0 - 3.0 In-Place S Flood Plain S HAI 15-May-06 6486-060515-282 0.0 - 1.0 In-Place S Flood Plain S HAI 15-May-06 6486-060515-283 1.0 - 2.0 In-Place 41.3 S Flood Plain S HAI 15-May-06 6486-060515-284 2.0 - 3.0 In-Place 13.3 S Flood Plain T HAI 15-May-06 6486-060515-279 1.0 - 2.0 In-Place 15.9 S Flood Plain T HAI 15-May-06 6486-060515-280 2.0 - 3.0 In-Place 16.1 S Flood Plain T HAI 15-May-06 6486-060515-281 3.0 - 4.0 In-Place 24.6 S Flood Plain U HAI 15-May-06 6486-060515-285 0.0 - 1.0 In-Place 32.1 S Flood Plain U HAI 15-May-06 6486-060515-286 1.0 - 2.0 In-Place 29.2 S Flood Plain U HAI 15-May-06 6486-060515-287 2.0 - 3.0 In-Place 11.7 Pond V HAI 15-May-06 6486-060515-300 0.0 - 1.0 In-Place 21.5 Pond V HAI 15-May-06 6486-060515-301 1.0 - 2.0 In-Place 25.7 Pond V HAI 15-May-06 6486-060515-302 2.0 - 3.0 In-Place 7.87 Site Investigation Page 6 of 8 Tigard Library,Tigard,Oregon Updated: 10/7/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number 1,2 Depth Interval Disposition mg/kg(ppm) (feet bgs) (In-Place or Total Arsenic Removed) by EPA 6010 Default Background 3=_> 7. Construction Worker Screening Level° 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)5=_> 50. Pond W HAI 15-May-06 6486-060515-297 0.0 - 1.0 In-Place Pond W HAI 15-May-06 6486-060515-298 1.0 - 2.0 In-Place 12.5 Pond W HAI 15-May-06 6486-060515-299 2.0 - 3.0 In-Place 8.93 Pond X HAI 15-May-06 6486-060515-294 0.0 - 1.0 In-Place 9.04 Pond X HAI 15-May-06 6486-060515-295 1.0 - 2.0 In-Place 10.9 Pond X HAI 15-May-06 6486-060515-296 2.0 - 3.0 In-Place 29.8 Pond Y HAI 15-May-06 6486-060515-291 0.0 - 1.0 In-Place 17.9 Pond Y HAI 15-May-06 6486-060515-292 1.0 - 2.0 In-Place 10.6 Pond Y HAI 15-May-06 6486-060515-293 2.0 - 3.0 In-Place S Swale Z HAI 15-May-06 6486-060515-303 0.0 - 1.0 In-Place 9.33 S Swale Z HAI 15-May-06 6486-060515-304 1.0 - 2.0 In-Place 23.2 S Swale Z HAI 15-May-06 6486-060515-305 2.0 - 3.0 In-Place 5.34 S Swale Aa HAI 15-May-06 6486-060515-272 0.0 - 1.0 In-Place 13.5 S Swale Aa HAI 15-May-06 6486-060515-273 1.0 - 2.0 In-Place 17.5 S Swale Aa HAI 15-May-06 6486-060515-274 2.0 - 3.0 In-Place 6.89 S Swale Ab HAI 15-May-06 6486-060515-276 0.0 - 1.0 In-Place 41.2 S Swale Ab HAI 15-May-06 6486-060515-277 1.0 - 2.0 In-Place 13.5 S Swale Ab HAI 15-May-06 6486-060515-278 2.0 - 3.0 In-Place 5.87 S Swale Ac+ HAI 10-May-06 6486-060510-223 2.0 - 3.0 In-Place 32. S Swale Ac+ HAI 11-Ma -06 6486-060511-235 3.0 - 4.0 In-Place INIAMM S Swale Ac+ HAI 11-Ma -06 6486-060511-236 4.0 - 5.0 In-Place 19.1 &Swale Ac+ HAI 11-May-06 6486-060511-237 5.0 - 6.0 In-Place 26.8 Wall Street ROW Ad HAI 15-May-06 6486-060515-288 0.0 - 1.0 In-Place 2.75 Wall Street ROW Ad HAI 15-May-06 6486-060515-289 1.0 - 2.0 In-Place 5.05 Wall Street ROW Ae HAI 15-May-06 6486-060515-268 0.0 - 1.0 In-Place 8.75 Wall Street ROW Ae HAI 15-May-06 6486-060515-269 1.0 - 2.0 In-Place 14.5 Wall Street ROW Ae HAI 15-May-06 6486-060515-270 2.0 - 3.0 In-Place 3.68 Wall Street ROW Af HAI 10-May-06 6486-060510-216 0.0 - 1.0 In-Place 5.16 Wall Street ROW Af HAI 10-May-06 6486-060510-217 1.0 - 2.0 In-Place 47.6 Wall Street ROW Af HAI 10-May-06 6486-060510-218 2.0 - 3.0 In-Place 17.7 Wall Street ROW Af HAI 10-May-06 6486-060510-219 3.0 - 4.0 In-Place 12.1 Wall Street ROW A + HAI 10-May-06 6486-060510-215 0.0 - 1.0 In-Place 4.96 Wall Street ROW A + HAI 10-Ma -06 6486-060510-215b 0.0 - 1.0 In-Place 5.43 Hall Blvd ROW Ah+ HAI 10-Ma -06 6486-060510-208 -1.0 - 0.0 In-Place 4.82 Hall Blvd ROW Ah+ HAI 10-Ma -06 6486-060510-209 0.0 - 1.0 In-Place 6.03 Hall Blvd ROW Ah+ HAI 10-Ma -06 6486-060510-210 1.0 - 2.0 In-Place 6.39 Hall Blvd ROW Ah+ HAI 10-Ma -06 6486-060510-211 2.0 - 3.0 In-Place 6.07 SW Margin Ai+ HAI 10-May-06 6486-060510-207 0.0 - 1.0 In-Place 9.37 SW Margin A'+ HAI 10-May-06 6486-060510-201 0.0 - 1.0 In-Place 5.5 SW Margin A'+ HAI 10-May-06 6486-060510-202 1.0 - 2.0 In-Place 7.12 SW Margin A'+ HAI 10-May-06 6486-060510-203 2.0 - 3.0 In-Place 4.96 SW Margin Ak+ HAI 10-May-06 6486-060510-200 3.0 - 4.0 In-Place 4.93 SW Margin Ak+ HAI 15-May-06 6486-060515-392 3.0 - 4.0 In-Place 3.6 SW Margin Ak+ HAI 15-May-06 6486-060515-393 4.0 - 5.0 In-Place 3.98 Central Tree Area I Al I HAI 10-May-06 6486-060510-224 0.5 - 1.5 In-Place 6.72 Central Tree Area I Al I HAI 10-May-06 6486-060510-225 1.5 - 2.5 In-Place 7.93 Site Investigation Page 7 of 8 Tigard Library,Tigard,Oregon Updated: 10/7/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. TABLE 1 -Summary of Arsenic Testing in Soil Area Sample Sampled Sample Sample Sample Soil Analytical Results Location By Date Number" Depth Interval Disposition mg/kg(ppm) (feet bgs) (In-Place or Total Arsenic Removed) by EPA 6010 Default Background 3=_> 7. Construction Worker Screening Level° 13. Terrestrial Ecological Screening Level(Lowest DEQ SLV X 5)5=_> 50. Central Tree Area AI HAI 10-Ma -06 6486-060510-226 2.5 - 3.5 In-Place 7.63 Central Tree Area At HAI 10-Ma -06 6486-060510-227 3.5 - 4.5 In-Place 3.85 Central Tree Area Am HAI 11-M_a�-06 6486-060511-228 0.0 - 1.0 In-Place 9.36 Central Tree Area Am HAI 11--May-06 6486-060511-229 1.0 - 2.0 In-Place 12.5 Central Tree Area Am HAI 11-May-06 6486-060511-230 2.0 - 3.0 In-Place 9.9 Central Tree Area Am HAI 11-May-06 6486-060511-231 3.0 - 4.0 In-Place 5.55 Central Tree Area Ao HAI 15-May-06 6486-060515-353 0.0 - 1.0 In-Place 14. Central Tree Area Ao HAI 15-May-06 6486-060515-354 1.0 - 2.0 In-Place 25.5 Central Tree Area Ao HAI 15-May-06 6486-060515-355 2.0 - 3.0 In-Place 10.1 Central Tree Area Ao HAI 15-May-06 6486-060515-356 3.0 - 4.0 In-Place 7.64 Pine Tree Area An HAI 11-May-06 6486-060511-232 0.5 - 1.5 In-Place Pine Tree Area An HAI 11-Ma -06 6486-060511-233 1.5 - 2.5 In-Place 17.6 Pine Tree Area An HAI 11-1, 6486-060511-234 2.5 - 3.5 In-Place 5.61 Pine Tree Area Ap HAI 15-Ma -06 6486-060515-350 0.0 - 1.0 In-Place 5.81 Pine Tree Area Ap HAI 15-Ma -06 6486-060515-351 1.0 - 2.0 In-Place 9.43 Pine Tree Area Ap HAI 15-May-06 6486-060515-352 2.0 - 3.0 In-Place 5.84 NW Field Ag HAI 11-May-06 6486-060511-238 0.0 - 1.0 In-Place 4.25 NW Field Aq HAI 11-May-06 6486-060511-238b 0.0 - 1.0 In-Place 4.81 NW Field Aq HAI 11-May-06 6486-060511-239 1.0 - 2.0 In-Place 5.79 NW Field Ar HAI 11-May-06 6486-060511-242 0.0 - 1.0 In-Place 3.7 NW Field Ar I HAI 11-May-06 6486-060511-243 1.0 - 2.0 In-Place 4.8 Notes: bgs=below ground surface mg/kg=milligram per kilogram DEQ=Oregon Department of Environmental Quality U=not detected at or above laboratory reporting limit EPA=US Environmental Protection Agency 1=HAI Sample number prefix:5927-(for 2002,2003)or 6486-(for 2005) 2=Apex sample number prefix: 2070-or 2007- 3=DEQ Default Background Concentration for Soil(Oct 02) 4=DEQ Risk Based Concentration(RBC)for Construction Worker scenario(Sep 06) 5=Most stringent DEQ Ecological Level II Screening Level Value(SLV)for terrestrial receptor(Dec 01) 6=Composite sample +=Depth adjusted to reflect depth below pre-construction grade(different than current grade) Bold=Detected concentration exceeds default background level Yellow Shade=Detected concentration exceeds construction worker screening level Orange Shade=Detected concentration exceeds terrestrial ecological screening level Site Investigation Page 8 of 8 Tigard Library,Tigard,Oregon Updated: 10/7/06 reb File Name: 6486 Tables.xls HAHN AND ASSOCIATES,INC. Subject Propertys��. ,.,{y/y� Y3' ..*�'"�:.��'"ix.' J1. ' fN' AVA � T y {f"�.�_' n `;Boni a RAM" t Note: Base Map from the Beaverton (1984), Oregon FIGURE 1 USGS 7.5-Minute Quadrangle Site Location Ma Contour Interval: 10 Feet p Tigard Library 13500 SW Hall Boulevard NORTH Tigard, Oregon 0 1000 2000 4000 „ 1"=2000' eet HAHN AND ASSOCIATES, INC. ca a in Project No. 6486 October 2006 P i f q f 1i B �r ' f' 'y Aq ! n H .. I GQ£+ �' — 002 Ir O KBO D j L a� 1 M Md SS-35 F �8-34 N O r V 1 O SS 32 r 1 r , E 0 y �� o$'-, ..tit O.. `�'�- Os'';?5 '� O 0 l� 1 °�05 �� i ss sp 006 O O r ^ ' ssta ' r 1 I 55-12 _. O O _ O ypl' O C ss02q f ,1 !` si t 209 Tigard Library SS-9 $,7S-8 � � SQ6 SS-10 O` O O ' 1 l' 1 An a 55-3 Sa 6'Ft �S0 6 � � 1 .--p O J O p , t fr. SS'S9 b607 b'9 f _� -Am O Q AO F / 1 55.53 1 ' 1 10 ' Area 1 Al 1 Q - - CD i a ! Ak / z V 1 _ _ 1 i O 1 „ � r c 1 AlW qq i 1 Y 1, Ai C? O � f "O. ' X 1 i - Aa W a. ...... .. ..<..,._,�. .. ..,.... ,Ab C O , Ad 0 Ae J iB Ag Af Wall Strc et R Ah ED ( j , r�ond� .linrtims -1- 12 Pc:�tt F Scale in Feet ^- a Soil Sample Location(HAI,2002-2003) 0 Soil Sample Location(HAI,2005) FIGURE 2 i Site Map and Sample Locations Confirmation Sod Sample Location LEGEND (Apex map,2003),'_location uncertain Tigard Library ---•—•-- Site Boundary Soil Sample Location(HAI,May 2006) 13500 Stier Hail BOUIevard Tigard, Oregon Existing Structure Pre-Development Topographic Contour and 146 Associated Elevation in Feet MSL Arsenic-Af€ected Soil Removal HAHN AND ASSOCIATES, INC. 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At R2.2 9A3 @ V.2' Tre S4.3 @ V� 2.44 C 0,0-05 9 @ 0.6 1 S 17.6 @ 1 V-2 6 '7,4 a 5 4.49 @ 0.6-IS K2 I'-Z P 6,61 @ SA4 0_2'4 A 18S I R 4,14 1,5.2�0* 810 1 F-47-FT (7.1' 5.9 1.5 1[a.I @= i, ; S 4 L I SS-64 t SS-6 SS-3 S34 SS-1550 OSS-5 0 0 0 1 No @ 0`4 ipl 1_5 1�91 3 aly 1,R 33.3 Q 0'.1-R Sit i . 11 �, 0 5.7 V-2R? 0/ 18:4 0 1-:2-R 11 P 9.9 @ 2'.a 3.52 Q 0,5-1S .02 U-1. 1,55 3.59 1,5-2.0 I-T38 a__V F21.016 R, L&5 a Z$'J_ SS- I SS 3 16.9 01�1 0 0 231 1'-2' AM @ ty-i� 13,000a.1- \ 14.6 2'-3' �0 Q V 7-83 R I_ 6.75Q(Y-V 0Y.- @ V-2- S -53 S 108 C O�0-05 0 S 'Tree, AS 4.20 @ 0,5 Area, _Q S Al X4 2A 1,5-2.9 41.@ 1.6 ft it @ 3,3'R?I - �1, 1 1 , 3.4 al? q QJ5] - 2z t : 11_. 26 4 98 8S i 24.7 V-2' 25,7 @ 1�2� OSS-5�, 0' JOSS-56, ------- SS-- 156 7.87 0 2'�Y 22 0 a4'R 0 CA S I I 24S SS-57 R 29S SS-54 n _4"Q 2 31 0 8.2 @ 1'-2'R 5,68 0 2'-3' 12.6 @ 11-21, 6.72 @ 05-1-S' �7.93 a &$3 T-3 I Ak' 7A3 C 2,S-3,5' '44 *93 C 3 , - W 0 3,85@3, -4,6,� 17.621M tr.v SS �:98 @ 4�-54 SS-47 5 SS4 SS-50 SS-51 [4,15 0 0'.1-R 5,3200 J a."a 0- 3ZO C'2'.3-9 32S, 55 @ 0*-1, S&S Q 3%4�# is.1 QC-5,# 6-50 1,5-2� O,Sl�;S17 7.12 @ 1'-2'# 26.8@"'# z 41.3 4�96 0 2-3'0 1 Aj 2 S L6 0 4, 10.2 0'-1* .23.2 @ T-2-1 "4 2 . 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Confirmation Soil Sample Location(Apex map.2003) FIGURE 3 0 location uncertain,(not mapped) Arsenic in Soil: In-Place and LEGEND Site Boundary 0 Soil Sample Location(HAI, May 2006) Removed (All Depths) NLO Q D"-Ir "0 N%11" 70 4 13 WP 0 I L5,il.t)%, MExisting Structure Arsenic Concentrations in Soil(mg/kg)at Depth in Tigard Library F5 3_@0-0 Feet Below Ground Surface IND=not detected) 13500 SW Hall Boulevard Arsenic-Affected Soil Removal Area #=Depth adjusted to pre-construction grade (Apex,2003;HAI,2005) R=Subsequently removed Tigard, Oregon 0 Soil Sample Location(HAI,2002-03) Estimated Area of Shallow Soil(0-3 feet bgs) HAHN AND ASSOCIATES, INC. =. Containing Arsenic>7.0 mg/kg Project No.6486 October 2006 f~ _ I - reok _ t I i' k t R V qi z i k ; P 1I 1 ` i r 4. f k \F\ r4z r r x l r t ! ' r. l „.�+....r..,..rt . •.e.. . -- a N yp) z r — E i tFanno ' fIj t .; Point I M.. �� Condominiums o ° POW LEGEND Site Boundary FIGURE 4 Existing Structure Pre-Development Topography and Area of Arsenic Impact Pre-Development Topographic Contour and - Associated Elevation in Feet Above Mean Sea Level Tigard Library Estimated Area of Shallow$oil(0-3 fleet bgs) 13500 SW Nall Boulevard 1 0 30 60 120 Tigard, Oregon Containing Arsenic>7.0 mg/kg ca e rn feet HAHN AND ASSOCIATES,INC. 1940 Aerial Photograph Project No. 6486 October 2006 I � NORTH 1 'l Fano Cr 1 eek 1 .00 i 1 tC� L a $ E F "y� 5�g of 'N ! \ ` 4 t _ ! a� tp m . l; Tigard Library Pine , Tree i Area � ^co r 1 � Central Tres Area ,; i ------------------- 7F 's x { 1Al 1 3 ! # 1 n „ UM, m .a+ r Tr h ini 5 4 ' ------------------------------------------- - _._._._____._,__ Wall Street Right-of-Way _ m Fanno Point RetentionCondominiums �( '~ •V � � � Pond 0 30 60 120 _Scale in_Fe"t Area of soil containing arsenic(>7 mgtkgl based on testing results and site conceptual model FIGURE 5 Area of soil containing arsenic above Areas of Potential Concern (i Construction Worker screening level(>13 mg/kg) i ? LEGENDTigard Library Area of soil containing arsenic above Terrestrial Ecological screening level(>50 mg/kg) 13500 SW Ball Boulevard 'i •—•—�—� Site Boundary Tigard, Oregon i Area of remaining soil containing arsenic(>7 ! © Existing Structure mg/kg)that is capped with pavement and/or at least 2 feet of clean fill HAHN AND ASSOCIATES, INC. ! I Project No.6486 October 2006 PORTLAND,OR 9405 S.W.NIMBUS AVENUE TestAmerica BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:31 Notes and Definitions Report Specific Notes: HT-I - Sample analysis performed past method-specified holding time. Laboratory Reporting Conventions: DET - Analyte DETECTED at or above the Reporting Limit. Qualitative Analyses only. ND - Analyte NOT DETECTED at or above the reporting limit(MDL or MRL,as appropriate). NR/NA - Not Reported/Not Available dry - Sample results reported on a Dry Weight Basis. Results and Reporting Limits have been corrected for Percent Dry Weight. wet Sample results and reporting limits reported on a Wet Weight Basis(as received). Results with neither'wet'nor'dry'are reported on a Wet Weight Basis. RPD - RELATIVE PERCENT DIFFERENCE (RPDs calculated using Results,not Percent Recoveries). MRL - METHOD REPORTING LIMIT. Reporting Level at,or above,the lowest level standard ofthe Calibration Table. MDL* - METHOD DETECTION LIMIT. Reporting Level at,or above,the statistically derived limit based on 40CFR,Part 136,Appendix B. *MDLs are listed on the report only if the data has been evaluated below the MRL. Results between the MDL and MRL are reported as Estimated Results. Dil - Dilutions are calculated based on deviations from the standard dilution performed for an analysis,and may not represent the dilution found on the analytical raw data. Reporting- Reporting limits(MDLs and MRLs)are adjusted based on variations in sample preparation amounts,analytical dilutions and Limits percent solids,where applicable. Electronic - Electronic Signature added in accordance with TestAmerica's Electronic Reporting and Electronic Signatures Policy. Signature Application of electronic signature indicates that the report has been reviewed and approved for release by the laboratory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.Ibis analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc. com Page 7of7 iPORTLAND,TestAmerca OR BEA S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 August 11, 2006 Keary Knickerbocker Hahn and Associates, Inc. 434 NW Sixth Ave., Suite 203 Portland, OR 97209 RE: TIGDEQ Enclosed are the results of analyses for samples received by the laboratory on 05/12/06 14:35. The following list is a summary of the Work Orders contained in this report, generated on 08/11/06 19:27. If you have any questions concerning this report,please feel free to contact me. Work Order Project ProjectNumber PPE0584 TIGDEQ 6486 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. ky'UN 1y k�'c4 Roxanne L.Clifton,Project Manager www .testa m e r ica in c. co m Page Iof7 PORTLAND,OR 9405 S.W.NIMBUS AVENUE TestAmerica BEAVERTON,OR 97008-7132 ANALYTICAL TESTiNG CORP4RATkON ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:27 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060510-249 PPE0584-43 Soil 05/11/0614:07 05/12/0614:35 TestAmeriea-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain t ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa mer i c a i n c. c o m Page 2 of 7 PORTLAND,OR 9405 S.W.NIMBUS AVENUE Te stAmerica BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:27 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-43 (6486-060510-249) Soil Sampled:05/11/0614:07 Arsenic EPA 6020 5,07 ----- 0.640 mg/kg dry lx 6070776 07/20/06 09:30 07/21/06 17:59 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa m e r i c a i n c. c o m Page 3 of 7 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:27 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-43 (6486-060510-249) Soil Sampled:05/11/0614:07 %Solids NCA SOP 78,1 ----- 0.00 %by Ix 6070804 07/20/06 09:29 07/20/06 09:29 HT-1 Weight TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager w W W .t e s to m e r i c a j n c. c o m VV Page4of7 Testlimerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:27 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6070776 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike */ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6070776-BLK1) Extracted: 07/20/0609:30 Arsenic EPA 6020 ND --- 0.495 mg/kg wet Ix 07/21/06 09:24 LCS (6070776-BSI) Extracted: 07/20/0609:30 Arsenic EPA 6020 10.8 --- 0.505 mg/kg wet Ix 10.1 107% (80-120) -- -- 07/21/06 09:40 Duplicate (6070776-DUP1) QC Source: PPG0717-01 Extracted: 07/20/0609:30 Arsenic EPA 6020 6.21 --- 0.560 mg/kg dry Ix 4.01 43.1%(40) 07/21/06 10:10 Q-14 Matrix Spike (6070776-MS1) QC Source: PPG0717-01 Extracted: 07/20/06 09:30 Arsenic EPA 6020 13.6 --- 0.560 mg/kg dry Ix 4.01 11.2 85.6% (75-125) -- -- 07/21/06 10:25 Matrix Spike (6070776-MS2) QC Source: PPG0735-03 Extracted: 07/20/06 09:30 Arsenic EPA 6020 13.9 --- 0.525 mg/kgdry lx 5.21 10.5 82.8% (75-125) -- -- 07/21/0610:54 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa m e r ica in c. co m Page5of7 riTestAmeca PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:27 Percent Dry Weight(Solids)per Standard Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6070804 Other wet Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike % (Limits) °" (Limits) Analyzed Notes Result Amt REC RPD Duplicate (6070804-DUPI) QC Source: PPE0584-43 Extracted: 07/20/06 09:29 %Solids NCASOP 78.2 --- 0.00%by Weight Ix 78.1 0.128%(20) 07/20/0609:29 TestAmerica-Portland,OR 'he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa me r ica in c. co m Page 6of7 /rte PORTLAND,OR 9405 S.W.NIMBUS AVENUE (j,�'!1 BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING,CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:27 Notes and Definitions Report Specific Notes: HT-1 - Sample analysis performed past method-specified holding time. Q-14 - The matrix spike recovery,and/or RPD,for this QC sample is outside of control limits due to a non-homogeneous sample matrix. Laboratory Reporting Conventions: DET - Analyte DETECTED at or above the Reporting Limit. Qualitative Analyses only. ND - Analyte NOT DETECTED at or above the reporting limit(MDL or MRL,as appropriate). NR/NA - Not Reported/Not Available dry - Sample results reported on a Dry Weight Basis. Results and Reporting Limits have been corrected for Percent Dry Weight. wet Sample results and reporting limits reported on a Wet Weight Basis(as received). Results with neither'wet'nor'dry'are reported on a Wet Weight Basis. RPD - RELATIVE PERCENT DIFFERENCE (RPDs calculated using Results,not Percent Recoveries). MRL - METHOD REPORTING LIMIT. Reporting Level at,or above,the lowest level standard of the Calibration Table. MDL* - METHOD DETECTION LIMIT. Reporting Level at,or above,the statistically derived limit based on 40CFR,Part 136,Appendix B. *MDLs are listed on the report only if the data has been evaluated below the MRL. Results between the MDL and MRL are reported as Estimated Results. Dil - Dilutions are calculated based on deviations from the standard dilution performed for an analysis,and may not represent the dilution found on the analytical raw data. Reporting- Reporting limits(MDLs and MRLs)are adjusted based on variations in sample preparation amounts,analytical dilutions and Limits percent solids,where applicable. Electronic - Electronic Signature added in accordance with TestAmerica's Electronic Reporting and Electronic Signatures Policy. Signature Application of electronic signature indicates that the report has been reviewed and approved for release by the laboratory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. TestAmeriea-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofeustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa m e r ica in c. co m Page7of7 0 HAHN AND ASSOCIATES, INC. Laboratory 7A we r- C4. CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax(503)227-2209 Project Manager . ka, {r -ke, Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. (o Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name C Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results CommentsMatrix Analyse to be Performed Number Prefix:(����-�-pis--_ � 0 o w .2 E Q s Z Lab ID Sample# Date Time Sample Description - Remarks 'Z-&,Y 4t.5& o85_,? e o-1 _z& o9oc7 e )-Z- k Znq I U e - >4 - a 2 2- 0 ,30 �23 a d -2 x 950 - 2 0 crb 3 -4 v� u1 t7 Zelii(quished linqu' by Hahn ndAssociates,Inc. ate rimeRene Compa O� by Company D Time Received by Company a HAHN AND ASSOCIATES, INC. Laboratory r( CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203-Portland OR 97209 Lab Project No. _ Chain of Custody No. (503)7 0717•Fax(503)227-2209 Project Manager lafiLiquid with Sediment Sample Samples Received at 4C (Y or N) Project No. it y Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix 'Analyse to be Performed Sample Number Prefix: i i I m ��aa 4' E w � 5 Q b Z Q � Lab ID Sample Date Time Sample Description Remarks iose A. 9k 2 D r 1-4 Xa 1� Z (2v �C INC 5a �5176t Relinquish / Halin and Associates,Inc. D e Time Recei y Company Relinquished by Company Date Time Rdtleived by f Company HAHN AND ASSOCIATES, INC. Laboratory '7 / r c,, CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. _ (503)796-0717•Fax(503)227-2209 Project Manager P ✓ Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Anal ses to be Performed Sample Number Prefix:/ CD l m � _ E L U a Z Q Labll) Sample S Date Time Sample Description Remarks 1 X 0 1 x 'Z`)Z o I -Z 9 ( Z" OW 7-+4 lLilo X O-- - oI Relinqui by Hahn And Associates,Inc. Date Time Receiv y Company Relinquished by Company ate Time ReceTved by Comparfy d l HAHN AND ASSOCIATES, INC. Laboratory7zq��- ,777, CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax(503)227-2209`'- Project Manager II ! PEIC Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. 4A M Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name 0alMulti-Phase Sample Provide verbal Results (Y or N) Collected by Ben Uhl Test One(which) _i Test Separately Shake Provide Preliminary Fax Results Comments Matrix I Anal ses to be Performed Sample Number Prefix:��y�, m C U o � d g' 7 W a s Z c Lab ID Sample# Date Time Sample Description Remarks `z .5*1151 &Q VJ. 1-2- 7- A00 Y v 11ti 10 U -1 o I wv . Q v 3 51to 2n-I a 2. I -?- X z- o l�i 35� o �51 Ao 351 oxslo -Z Relinquished HahrVand Associates,Inc. D9te 6_ e � Time Recei Company Relinquislied by Company Date Time Received by Company HAHN AND ASSOCIATES, INC. Laboratory j i CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. _ Chain of Custody No. (503)796-0717•Fax(503)227-2209 Project Manager _eihe lel Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. 7 1 /� Test Mate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Anal sea to be Performed Sample Number Prefix: " e m � S EL Lab ID Sample# Date Time Sample Description Remarks 3SZ 1510 0 0-3 Ap, ,I -2, 2 �,) S -;�'Slf A01. s5- ——y9;J Ao 35(o b (o 01 3S4 10oa Da - 7- 3as t> UD W, t -Z Resiny Ha andAstwaatea,Inc D Time Recei Compan i;ht Relinquished by Company Date Time Re&gved by C6mpifny HAHN AND ASSOCIATES, INC. Laboratory CHAIN OF CUSTODY Environmental Consultants ; 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab'Project No. Chain of Custody No. (503)796-0717•Fax(503)227-2209 Project Manager ':07 V ' K42 rz hleA_ Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. n Test Filtrate Test Sedlment Test Both Appropriate Containers Used (Y or N Project Name +1 Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Anal see to be Performed Sample Number Prefix: N��;�� In 1 U 0 tZ E� Lab ID Sample 0 Date Time Sample Description Remarks 5 0(0 cs4 k. I-2- 3(v3 2-3(03 10k 0- 1 r04 I -Z I X 4s' 1122 1-3 -L-- 3 o Ic1 (o -Z Relinqui by Hahh and Associates,Inc. D e Time Race Compaq Relin uished by Company Date Time R by Conn HAHN AND ASSOCIATES, INC. Laboratory M-elf C CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax 503)227-2209 Project Manager Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name tz Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyses to be Performed Sample Number Prefix: �� t`i s�S"� tlJ s X 0) S Q i Q Lab ID Sample# Date Time Sample Description Remarks oG '22© E -Z zz, 2- �-3 6 3+'-t -L _Z_ I —2 r 1 yo 0- 1 X 1 I - Z 7x Relinqu' by Ha and Associates,Ina D Time Recei y Compa G YJ Re inqu shed by Company f Date I Time Received by Company FAY HAHN AND ASSOCIATES, INC. Laboratory -7 CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax(503)227-/2209 Project Manager ! Liquid with Sediment Sample Samples Received at aC (Y or N) Project No. Text Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name ' Multi-Phase Sample Provide verbal Results (Y or N) Collected by Ban Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix I Analyses to be Performed Sample Number Prefix: ID .gym. H Lab ID Sample# Date Time Sample Description Remarks ob oG ILAM 0 1-7- 72;, 2 '� - 3HO I'J - 512. 2 C) U -Z q \53)(0 -Z- i+ Relinquis Hah and Associates,Inc. Dat Time Recei Company s � o� Relinqu' hed by Company ate Time Received by Company i HAHN AND-ASSOCIATES, INC. Laboratory .'Te-!;'rA V CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax(503)227-2209 Project Manager v j' -CD ` Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyses to be Performed Sample Number Prefix:6'[j4-Q&0S"/S ._ I I v S m E i S .o i rn z � a Lab ID Sample S Date Time Sample Description Remarks 31Z 511-5'/k, o l 3�9 K Z- I Relinqui y Hahn and Associates,Inc. Dat / Time Race' Com rP -I42!:�:Z:z Relinquished by Company Oate Time Recbived by c6mpafly IAI: Non-Conformances? Circle Y or N (If Y, see other side) TEST AMERICA SAMPLE RECEIPT CHECKLIST Received By: Logged-in By: Unpacked/Labeled By: Cooler ID: ( of J (applies in rem(i. rec pt) ( l Date: / 6"" Date: t Date: 1 Work Order No Time: Initials Initials: Client: Y-t0 4 P7 Initials- T/ Project: Container Type: COC Seals: Packing Material Cooier Ship. Container Sign By Bubble Bags Stvrofoam Box On Bottles Date Foam Packs None/Other None )�None/Other Other Refrigerant: Received Via: Bill# Gel Ice Pack Yn None Fed Ex Client Loose Ice UPS NCA Courier None/Other DHL Mid Valley Senvoy TDP GS Other Cooler Temperature (IRZ�.� °C Plastic Glass (Frozen filters, Tedlars and aqueous Metals exempt) (circle o Temperature Blank? °C or NA Trip Blank? Y or N or NA _ Sample Containers.. ID ID Intact? or N Metals Preserved? Y or No Provided by NCA? Y or N Client QAPP Preserved? Y or N o N Correct Type? Y r N Adequate Volume? Oor N (for tests requested) #Containers match COC? r N Water VOAs: Headspace? Y or N o NA IDs/time/date match COC? Y r N Comments: Hold Times in hold? Y r N PROJECT MANAGEMENT Is the Chain of Custody complete? Y Or N If N,circle the items that were incomplete Comments,Problems Total access set up? Y or N Has client been contacted regarding non-conformances? Y or N If Y, Date Time PM Initials Date: Time: (rev 3.09112/05) TestAmeric/�`a PORTLAND,OR 9405 S.W.NIMBUS AVENUE l�.`�il. BEAVERTON,OR 97008-7132 ANALYTICAL TESTINGS CORPORATION ph:(503)906.9200 fax:(503)906.9210 June 01, 2006 Keary Knickerbocker Hahn and Associates, Inc. 434 NW Sixth Ave., Suite 203 Portland, OR 97209 RE: TIGDEQ Enclosed are the results of analyses for samples received by the laboratory on 05/16/06 17:30. The following list is a summary of the Work Orders contained in this report, generated on 06/01/06 12:53. If you have any questions concerning this report,please feel free to contact me. Work Order Project ProjectNumber PPE0751 TIGDEQ 6486 TestAmeriea-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .to s t a 171 e r i ca i Tt c . co m Pagel of 18 j I0 �[yU�mer i / PORTLAND,OR 9405 S.W.NIMBUS AVENUE ��`'„-!`�.�j ;Rtr.��. BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060515-268 PPE0751-01 Soil 05/15/06 08:50 05/16/06 17:30 6486-060515-269 PPE0751-02 Soil 05/15/06 09:00 05/16/06 17:30 6486-060515-270 PPE0751-03 Soil 05/15/06 09:10 05/16/06 17:30 6486-060515-272 PPE0751-05 Soil 05/15/06 09:30 05/16/06 17:30 6486-060515-273 PPE0751-06 Soil 05/15/06 09:40 05/16/06 17:30 6486-060515-276 PPE0751-09 Soil 05/15/0610:10 05/16/0617:30 6486-060515-277 PPE0751-10 Soil 05/15/0610:20 05/16/0617:30 6486-060515-279 PPE0751-12 Soil 05/15/0610:50 05/16/0617:30 6486-060515-282 PPE0751-15 Soil 05/15/0611:20 05/16/0617:30 6486-060515-283 PPE0751-16 Soil 05/15/0611:30 05/16/0617:30 6486-060515-285 PPE0751-18 Soil 05/15/0612:00 05/16/0617:30 6486-060515-286 PPE0751-19 Soil 05/15/0612:10 05/16/0617:30 6486-060515-288 PPE0751-21 Soil 05/15/0612:30 05/16/0617:30 6486-060515-289 PPE0751-22 Soil 05/15/0612:40 05/16/0617:30 6486-060515-291 PPE0751-24 Soil 05/15/0613:50 05/16/0617:30 6486-060515-292 PPE0751-25 Soil 05/15/0614:00 05/16/0617:30 6486-060515-294 PPE0751-27 Soil 05/15/0614:10 05/16/0617:30 6486-060515-295 PPE0751-28 Soil 05/15/0614:20 05/16/0617:30 6486-060515-297 PPE0751-30 Soil 05/15/0614:40 05/16/0617:30 6486-060515-298 PPE0751-31 Soil 05/15/0614:50 05/16/0617:30 6486-060515-300 PPE0751-33 Soil 05/15/0615:10 05/16/0617:30 6486-060515-301 PPE0751-34 Soil 05/15/0615:20 05/16/0617:30 6486-060515-303 PPE0751-36 Soil 05/15/0615:40 05/16/0617:30 6486-060515-304 PPE0751-37 Soil 05/15/0615:50 05/16/0617:30 6486-060515-350 PPE0751-39 Soil 05/15/06 08:51 05/16/06 17:30 6486-060515-351 PPE0751-40 Soil 05/15/06 08:56 05/16/06 17:30 6486-060515-353 PPE0751-42 Soil 05/15/06 09:16 05/16/06 17:30 6486-060515-354 PPE0751-43 Soil 05/15/06 09:23 05/16/06 17:30 6486-060515-355 PPE0751-44 Soil 05/15/06 09:29 05/16/06 17:30 6486-060515-357 PPE0751-46 Soil 05/15/0610:02 05/16/0617:30 6486-060515-358 PPE0751-47 Soil 05/15/0610:07 05/16/0617:30 6486-060515-358b PPE0751-48 Soil 05/15/0610:08 05/16/0617:30 6486-060515-360 PPE0751-50 Soil 05/15/0610:30 05/16/0617:30 6486-060515-361 PPE0751-51 Soil 05/15/0610:34 05/16/0617:30 6486-060515-363 PPE0751-53 Soil 05/15/0611:08 05/16/0617:30 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa mericainc . com Page 2of18 PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 TestAmerica ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060515-364 PPE0751-54 Soil 05/15/0611:14 05/16/0617:30 6486-060515-366 PPE0751-57 Soil 05/15/0611:42 05/16/0617:30 6486-060515-367 PPE0751-58 Soil 05/15/0611:49 05/16/0617:30 6486-060515-369 PPE0751-60 Soil 05/15/0612:15 05/16/0617:30 6486-060515-370 PPE0751-61 Soil 05/15/0612:20 05/16/0617:30 6486-060515-373 PPE0751-63 Soil 05/15/0612:30 05/16/0617:30 6486-060515-374 PPE0751-64 Soil 05/15/0612:38 05/16/0617:30 6486-060515-376 PPE0751-66 Soil 05/15/0612:49 05/16/0617:30 6486-060515-377 PPE0751-67 Soil 05/15/0612:53 05/16/0617:30 6486-060515-379 PPE0751-69 Soil 05/15/0614:05 05/16/0617:30 6486-060515-380 PPE0751-70 Soil 05/15/0614:18 05/16/0617:30 6486-060515-380b PPE0751-71 Soil 05/15/0614:19 05/16/0617:30 6486-060515-384 PPE0751-73 Soil 05/15/0614:45 05/16/0617:30 6486-060515-386 PPE0751-75 Soil 05/15/0614:57 05/16/0617:30 6486-060515-387 PPE0751-76 Soil 05/15/0615:07 05/16/0617:30 6486-060515-389 PPE0751-78 Soil 05/15/0615:22 05/16/0617:30 6486-060515-390 PPE0751-79 Soil 05/15/0615:30 05/16/0617:30 6486-060515-392 PPE0751-81 Soil 05/15/0616:03 05/16/0617:30 6486-060515-393 PPE0751-82 Soil 05/15/0616:07 05/16/0617:30 TestAmeriea-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page3of18 iPORTLAND,TestAmerca OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANAtYTICAL TESTING CORPQRATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-01 (6486-060515-268) Soil Sampled:05/1.5/06 08:50 Arsenic EPA 6020 8.75 ----- 0.547 mg/kg dry Ix 6050860 05/18/06 09:26 05/31/06 22:48 PPE0751-02 (6486-060515-269) Soil Sampled:05/15/06 09:00 Arsenic EPA 6020 14,5 ----- 0.568 mg/kg dry ]x 6050860 05/18/06 09:26 05/31/06 23:11 PPE0751-03 (6486-060515-270) Soil Sampled:05/15/06 09:10 Arsenic EPA 6020 3,68 ----- 0.579 mg/kg dry ]x 6050860 05/18/06 09:26 05/31/06 23:18 PPE0751-05 (6486-060515-272) Soil Sampled:05/15/06 09:30 Arsenic EPA 6020 13.5 ----- 0.666 mg/kg dry lx 6050860 05/18/06 09:26 05/31/06 23:26 PPE0751-06 (6486-060515-273) Soil Sampled:05/15/06 09:40 Arsenic EPA 6020 17,5 ----- 0.653 mg/kg dry lx 6050860 05/18/06 09:26 05/31/06 23:33 PPE0751-09 (6486-060515-276) Soil Sampled:05/15/0610:10 Arsenic EPA 6020 41,2 —=-- 0.689 mg/kg dry ' Ix 6050860 05/18/06 09:26 05/31/06 23:56 PPE0751-10 (6486-060515-277) Soil Sampled:05/15/0610:20 Arsenic EPA 6020 13.5 — 0.634 mg/kg dry Ix 6050860 05/18/06 09:26 06/01/06 00:03 PPE0751-12 (6486-060515-279) Soil Sampled:05/15/0610:50 Arsenic EPA 6020 15.9 ----- 0.655 mg/kg dry lx 6050860 05/18/06 09:26 06/01/06 00:11 PPE0751-15 (6486-060515-282) Soil Sampled:05/15/0611:20 Arsenic EPA 6020 96,2 ----- 0.588 mg/kg dry Ix 6050860 05/18/06 09:26 06/01/06 00:18 PPE0751-16 (6486-060515-283) Soil Sampled:05/15/0611:30 Arsenic EPA 6020 41.3 ----- 0.647 mg/kg dry ]x 6050860 05/18/06 09:26 06/01/06 00:26 PPE0751-18 (6486-060515-285) Soil Sampled:05/15/0612:00 Arsenic EPA 6020 32.1 ----- 0.656 mg/kg dry Ix 6050860 05/18/06 09:26 06/01/06 00:33 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .t e S t a m e r i c a i n c . c o m Page 44 of 18 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analvzed Notes PPE0751-19 (6486-060515-286) Soil Sampled:05/15/0612:10 Arsenic EPA 6020 29,2 ----- 0.653 mg/kg dry lx 6050860 05/18/06 09:26 06/01/06 00:48 PPE0751-21 (6486-060515-288) Soil Sampled:05/15/0612:30 Arsenic EPA 6020 2,75 ----- 0.640 mg/kg dry lx 6050860 05/18/06 09:26 06/01/06 00:56 PPE0751-22 (6486-060515-289) Soil Sampled:05/15/0612:40 Arsenic EPA 6020 5,05 ----- 0.655 mg/kg dry Ix 6050860 05/18/06 09:26 05/31/06 06:54 PPE0751-24 (6486-060515-291) Soil Sampled:05/15/0613:50 Arsenic EPA 6020 17,9 ----- 0.780 mg/kg dry ]x 6050860 05/18/06 09:26 05/31/06 07:01 PPE0751-25 (6486-060515-292) Soil Sampled:05/15/0614:00 Arsenic EPA 6020 10.6 ----- 1.23 mg/kg dry lx 6050860 05/18/06 09:26 05/31/06 07:09 PPE0751-27 (6486-060515-294) Soil Sampled:05/15/0614:10 Arsenic EPA 6020 9.04 ----- 0.669 mg/kg dry lx 6050860 05/18/06 09:26 05/31/06 07:16 PPE0751-28 (6486-060515-295) Soil Sampled:05/15/0614:20 Arsenic EPA 6020 10.9 ----- 0.686 mg/kg dry Ix 6050860 05/18/06 09:26 05/31/06 07:23 PPE0751-30 (6486-060515-297) Soil Sampled:05/15/0614:40 Arsenic EPA 6020 113 ----- 0.713 mg/kg dry Ix 6050860 05/18/06 09:26 05/31/06 07:31 PPE0751-31 (6486-060515-298) Soil Sampled:05/15/0614:50 Arsenic EPA 6020 12,5 ----- 0.701 mg/kg dry lx 6050860 05/18/06 09:26 05/31/06 07:38 PPE0751-33 (6486-060515-300) Soil Sampled:05/15/0615:10 Arsenic EPA 6020 21.5 ----- 1.40 mg/kg dry lx 6050942 05/19/06 11:38 05/24/06 16:54 PPE0751-34 (6486-060515-301) Soil Sampled:05/15/0615:20 Arsenic EPA 6020 25,7 ----- 0.783 mg/kg dry lx 6050942 05/19/06 11:38 05/24/06 22:03 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain ofcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page5of18 fit /�{� J / � � PORTLAND,OR 9405 S.W.NIMBUS AVENUE #�.�!?l�3 +R/, (l.�J BEAVERTON,OR 97008-7132 ANALYTICAL,TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-36 (6486-060515-303) Soil Sampled:05/15/0615:40 Arsenic EPA 6020 9.33 ----- 0.592 mg/kg dry Ix 6050942 05/19/06 11:38 05/24/06 22:18 PPE0751-37 (6486-060515-304) Soil Sampled:05/15/0615:50 Arsenic EPA 6020 23,2 ----- 0.642 mg/kg dry Ix 6050942 05/19/06 11:38 05/24/06 22:34 PPE0751-39 (6486-060515-350) Soil Sampled:05/15/06 08:51 Arsenic EPA 6020 5,81 ----- 0.628 mg/kg dry Ix 6050942 05/19/06 11:38 05/24/06 22:49 PPE0751-40 (6486-060515-351) Soil Sampled:05/15/06 08:56 Arsenic EPA 6020 9.43 ----- 0.669 mg/kg dry lx 6050942 05/19/06 11:38 05/24/06 23:05 PPE0751-42 (6486-060515-353) Soil Sampled:05/15/06 09:16 Arsenic EPA 6020 14,0 ----- 0.841 mg/kg dry lx 6050942 05/19/06 11:38 05/24/06 23:20 PPE0751-43 (6486-060515-354) Soil Sampled:05/15/06 09:23 Arsenic EPA 6020 25,5 ----- 0:613 mg/kg dry lx 6050942 05/19/06 11:38 05/24/06 23:36 PPE0751-44 (6486-060515-355) Soil Sampled:05/15/06 09:29 Arsenic EPA 6020 10.1 ----- 0.612 mg/kg dry Ix 6050942 05/19/06 11:38 05/25/06 00:07 PPE0751-46 (6486-060515-357) Soil Sampled:05/15/0610:02 Arsenic EPA 6020 32,8 ----- 0.610 mg/kg dry Ix 6050942 05/19/06 11:38 05/25/06 01:39 PPE075147 (6486-060515-358) Soil Sampled:05/15/0610:07 Arsenic EPA 6020 11.2 --- 0.659 mg/kg dry Ix 6050942 05/19/06 11:38 05/25/06 01:55 PPE0751-48 (6486-060515-358b) Soil Sampled:05/15/0610:08 Arsenic EPA 6020 11.0 ----- 0.661 mg/kg dry lx 6050942 05/19/06 11:38 05/25/06 02:10 PPE0751-50 (6486-060515-360) Soil Sampled:05/15/0610:30 Arsenic EPA 6020 3,78 ----- 0.551 mg/kg dry lx 6050942 05/19/06 11:38 05/25/06 02:26 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .te s t a m e r l ca j n c . co 171 Page6of18 T � PORTLAND,OR 9405 S.W.NIMBUS AVENUE fest BEAVERTON,OR 97008-7132 ANALYTICAt TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-51 (6486-060515-361) Soil Sampled:05/15/0610:34 Arsenic EPA 6020 17,2 ----- 0.653 mg/kg dry Ix 6050942 05/19/06 11:38 05/25/06 02:41 PPE0751-53 (6486-060515-363) Soil Sampled:05/15/0611:08 Arsenic EPA 6020 6,70 ----- 0.588 mg/kg dry lx 6050942 05/19/06 11:38 05/25/06 02:57 PPE0751-54 (6486-060515-364) Soil Sampled:05/15/0611:14 Arsenic EPA 6020 30.6 ----- 0.676 mg/kg dry Ix 6050942 05/19/06 11:38 05/25/06 03:12 PPE0751-57 (6486-060515-366) Soil Sampled:05/15/0611:42 Arsenic EPA 6020 5.06 ----- 0.549 mg/kg dry Ix 6050942 05/19/06 11:38 05/25/06 03:28 PPE0751-58 (6486-060515-367) Soil Sampled:05/15/0611:49 Arsenic EPA 6020 27,6 ----- 0.666 mg/kg dry lx 6050942 05/19/06 11:38 05/25/06 03:43 PPE0751-60 (6486-060515-369) Soil Sampled:05/15/0612:15 Arsenic EPA 6020 10,2 ----- 0.546 mg/kg dry lx 6050943 Q5/19/06 11:43 05/26/06 04:29 PPE0751-61 (6486-060515-370) Soil Sampled:05/15/0612:20 Arsenic EPA 6020 4,22 --- 0.600 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 06:44 PPE0751-63 (6486-060515-373) Soil Sampled:05/15/0612:30 Arsenic EPA 6020 7,86 ----- 0.606 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 06:52 PPE0751-64 (6486-060515-374) Soil Sampled:05/15/0612:38 Arsenic EPA 6020 22.8 ----- 0.651 mg/kg dry lx 6050943 05/19/06 11:43 05/26/06 06:59 PPE0751-66 (6486-060515-376) Soil Sampled:05/15/0612:49 Arsenic EPA 6020 5.55 ---- 0.611 mg/kg dry lx 6050943 05/19/06 11:43 05/26/06 07:07 PPE0751-67 (6486-060515-377) Soil Sampled:05/15/0612:53 Arsenic EPA 6020 8.64 ----- 0.647 mg/kg dry ]x 6050943 05/19/06 11:43 05/26/06 07:29 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page7of18 TestAmericaPORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analvzed Notes PPE0751-69 (6486-060515-379) Soil Sampled:05/15/0614:05 Arsenic EPA 6020 11.8 ----- 0.584 mg/kg dry lx 6050943 05/19/06 11:43 05/26/06 07:37 PPE0751-70 (6486-060515-380) Soil Sampled:05/15/06 14:18 Arsenic EPA 6020 29.3 ----- 0.656 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 07:44 PPE0751-71 (6486-060515-380b) Soil Sampled:05/15/0614:19 Arsenic EPA 6020 14.1 ----- 0.623 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 07:52 PPE0751-73 (6486-060515-384) Soil Sampled:05/15/0614:45 Arsenic EPA 6020 6,93 ----- 0.628 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 04:59 PPE0751-75 (6486-060515-386) Soil Sampled:05/15/0614:57 Arsenic EPA 6020 16.9 ----- 0.598 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 07:59 PPE0751-76 (6486-060515-387) Soil Sampled:05/15/0615:07 Arsenic EPA 6020 23,3 ----- 0.657 mg/kg dry Ix 6050943 05/19/06 11.43 05/26/06 08:06 PPE0751-78 (6486-060515-389) Soil Sampled:05/15/0615:22 Arsenic EPA 6020 32.9 — 0.590 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 08:14 PPE0751-79 (6486-060515-390) Soil Sampled:05/15/0615:30 Arsenic EPA 6020 24,7 --- 0.589 mg/kg dry lx 6050943 05/19/06 11:43 05/26/06 08:21 PPE0751-81 (6486-060515-392) Soil Sampled:05/15/0616:03 Arsenic EPA 6020 3.60 ----- 0.623 mg/kg dry lx 6050943 05/19/06 11:43 05/26/06 08:29 PPE0751-82 (6486-060515-393) Soil Sampled:05/15/0616:07 Arsenic EPA 6020 3,98 ----- 0.619 mg/kg dry Ix 6050943 05/19/06 11:43 05/26/06 08:36 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain ` ajcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .te s a mn e r l ca I n c . co mn Page8of18 TesPORTLAND,tAmerica OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CQRPQRATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager. Keary Knickerbocker 06/01/06 12:53 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-01 (6486-060515-268) Soil Sampled:05/15/06 08:50 %Solids NCA SOP 88,7 ----- 1.00 °/by lx 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-02 (6486-060515-269) Soil Sampled:05/15/06 09:00 %Solids NCA SOP 83,8 ----- 1.00 %by Ix 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-03 (6486-060515-270) Soil Sampled:05/15/06 09:10 %Solids NCASOP 84,7 ----- 1.00 %by lx 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-05 (6486-060515-272) Soil Sampled:05/15/06 09:30 %Solids NCA SOP 72.9 ----- 1.00 %by ]x 6050852 05/18/0608:38 05/19/0609:12 Weight PPE0751-06 (6486-060515-273) Soil Sampled:05/15/06 09:40 %Solids NCASOP 75,1 ----- 1.00 %by ix 6050852 05/18/0608:38 05/19/0609:12 Weight PPE0751-09 (6486-060515-276) Soil Sampled:05/15/0610:10 %Solids NCASOP 71,8 ----- 1.00 %by lx 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-10 (6486-060515-277) Soil Sampled:05/15/0610:20 %Solids NCASOP 78,1 ----- 1.00 %by ]x 6050852 05/18/0608:38 05/19/0609:12 Weight PPE0751-12 (6486-060515-279) Soil Sampled:05/15/0610:50 %Solids NCA SOP 79,5 ----- 1.00 %by lx 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-15 (6486-060515-282) Soil Sampled:05/15/0611:20 %Solids NCASOP 85.1 ----- 1.00 %by lx 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-16 (6486-060515-283) Soil Sampled:05/15/0611:30 %Solids NCASOP 78,8 ----- 1.00 %by lx 6050852 05/18/0608:38 05/19/0609:12 Weight PPE0751-18 (6486-060515-285) Soil Sampled:05/15/0612:00 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .teSta me rice in c . co m Page5of18 TesU�merica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAt TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analvzed Notes PPE0751-18 (6486-060515-285) Soil Sampled:05/15/0612:00 %Solids NCASOP 80.2 ----- 1.00 %by lx 6050852 05/18/0608:38 05/19/0609:12 Weight PPE0751-19 (6486-060515-286) Soil Sampled:05/15/0612:10 %Solids NCASOP 75,8 ----- 1.00 %by Ix 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-21 (6486-060515-288) Soil Sampled:05/15/0612:30 %Solids NCASOP 74.4 ----- 1.00 %by Ix 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-22 (6486-060515-289) Soil Sampled:05/15/0612:40 %Solids NCASOP 74.8 ----- 1.00 %by lx 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-24 (6486-060515-291) Soil Sampled:05/15/0613:50 %Solids NCA SOP 63.5 ----- 1.00 %by Ix 6050852 05/18/0608:38 05/19/0609:12 Weight PPE0751-25 (6486-060515-292) Soil Sampled:05/15/0614:00 %Solids NCASOP 42.0 ----- 1.00 %by Ix 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-27 (6486-060515-294) Soil Sampled:05/15/0614:10 %Solids NCASOP 74,0 ---- 1.00 %by Ix 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-28 (6486-060515-295) Soil Sampled:05/15/0614:20 %Solids NCASOP 74.4 ----- 1.00 %by Ix 6050852 05/18/0608:38 05/19/0609:12 Weight PPE0751-30 (6486-060515-297) Soil Sampled:05/15/0614:40 %Solids NCASOP 72.3 ----- 1.00 %by lx 6050852 05/18/06 08:38 05/19/06 09:12 Weight PPE0751-31 (6486-060515-298) Soil Sampled:05/15/0614:50 %Solids NCASOP 72,0 ----- 1.00 %by lx 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-33 (6486-060515-300) Soil Sampled:05/15/0615:10 TestAmerica-Portland,OR 'he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. �+ Roxanne L.Clifton,Project Manager www .testamericainc . com Page 10 of 18 PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 TestAmericaph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-33 (6486-060515-300) Soil Sampled:05/15/0615:10 %Solids NCA SOP 36.8 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-34 (6486-060515-301) Soil Sampled:05/15/0615:20 %Solids NCA SOP 65.2 ----- 1.00 %by lx 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-36 (6486-060515-303) Soil Sampled:05/15/0615:40 %Solids NCA SOP 87,0 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-37 (6486-060515-304) Soil Sampled:05/15/0615:50 %Solids NCA SOP 79.5 ----- 1.00 °/by ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-39 (6486-060515-350) Soil Sampled:05/15/06 08:51 %Solids NCA SOP 81.2 ----- 1.00 %by lx 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE075140 (6486-060515-351) Soil Sampled:05/15/06 08:56 %Solids NCA SOP 77.1 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-42 (6486-060515-353) Soil Sampled:05/15/06 09:16 %Solids NCA SOP 58.3 ----- 1.00 °/by ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-43 (6486-060515-354) Soil Sampled:05/15/06 09:23 %Solids NCA SOP 81.6 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-44 (6486-060515-355) Soil Sampled:05/15/06 09:29 %Solids NCA SOP 82.5 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-46 (6486-060515-357) Soil Sampled:05/15/0610:02 %Solids NCA SOP 82.0 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-47 (6486-060515-358) Soil Sampled:05/15/0610:07 TestAmerica-Portland,OR 'he results in this report apply to the samples analyzed in accordance with the chain f, ofcustody document 7his analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager WWW .t e s t a m e r j c a j n c . c o m Page 11 of 18 TesU�merica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTtGAI TESTING fORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-47 (6486-060515-358) Soil Sampled:05/15/0610:07 %Solids NCA SOP 75.9 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-48 (6486-060515-358b) Soil Sampled:05/15/0610:08 %Solids NCA SOP 76,4 ----- 1.00 %by Ix 6050854 05/18/0608:39 05/19/0609:09 Weight PPE0751-50 (6486-060515-360) Soil Sampled:05/15/0610:30 %Solids NCA SOP 88,9 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-51 (6486-060515-361) Soil Sampled:05/15/0610:34 %Solids NCA SOP 76.6 ----- 1.00 %by Ix 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-53 (6486-060515-363) Soil Sampled:05/15/0611:08 %Solids NCA SOP 82,6 ----- 1.00 %by lx 6050854 05/18/06 08:39 05/19/06 09:09 Weight PPE0751-54 (6486-060515-364) Soil Sampled:05/15/0611:14 %Solids NCA SOP 77.1 ----- 1.00 %by Ix 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-57 (6486-060515-366) Soil Sampled:05/15/0611:42 %Solids NCA SOP 88,5 ----- 1.00 %by Ix 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-58 (6486-060515-367) Soil Sampled:05/15/0611:49 %Solids NCA SOP 75,8 ----- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-60 (6486-060515-369) Soil Sampled:05/15/0612:15 %Solids NCA SOP 88,9 ----- 1.00 %by Ix 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-61 (6486-060515-370) Soil Sampled:05/15/0612:20 %Solids NCA SOP 84,2 ----- 1.00 %by Ix 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-63 (6486-060515-373) Soil Sampled:05/15/0612:30 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager WWW .t E S t 8 fn @ f I C 8 1 f1 C co mPage 12 of 18 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALY71CAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-63 (6486-060515-373) Soil Sampled:05/15/0612:30 %Solids NCA SOP 85.0 ----- 1.00 %by Ix 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-64 (6486-060515-374) Soil Sampled:05/15/0612:38 %Solids NCASOP 76,1 ----- 1.00 %by Ix 6050851 05/18/0608:37 05/19/0609:05 Weight PPE0751-66 (6486-060515-376) Soil Sampled:05/15/0612:49 %Solids NCA SOP 84,3 ----- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-67 (6486-060515-377) Soil Sampled:05/15/0612:53 %Solids NCA SOP 80.5 ----- 1.00 %by ]x 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-69 (6486-060515-379) Soil Sampled:05/15/0614:05 %Solids NCA SOP 84,8 ----- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-70 (6486-060515-380) Soil Sampled:05/15/0614:18 %Solids NCA SOP 79.4 ----- 1.00 %by Ix 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-71 (6486-060515-380b) Soil Sampled:05/15/0614:19 %Solids NCA SOP 78,7 ----- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-73 (6486-060515-384) Soil Sampled:05/15/0614:45 %Solids NCA SOP 77.3 ---- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-75 (6486-060515-386) Soil Sampled:05/15/0614:57 %Solids NCA SOP 79,6 ----- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-76 (6486-060515-387) Soil Sampled:05/15/0615:07 %Solids NCA SOP 76.1 ----- 1.00 %by lx 6050851 05/18/0608:37 05/19/0609:05 Weight PPE0751-78 (6486-060515-389) Soil Sampled:05/15/0615:22 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain +�`� ..•�� ojcusiody document This analytical report must he reproduced in its entirety. Roxanne L.Clifton,Project Manager WWW .teSta merlcainc . com Page 13 of 18 TestAmericaPORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-78 (6486-060515-389) Soil Sampled:05/15/0615:22 %Solids NCA SOP 85.6 ----- 1.00 %by Ix 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-79 (6486-060515-390) Soil Sampled:05/15/0615:30 %Solids NCA SOP 80.9 ----- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight PPE0751-81 (6486-060515-392) Soil Sampled:05/15/0616:03 %Solids NCA SOP 81.1 ----- 1.00 %by Ix 6050851 05/18/0608:37 05/19/0609:05 Weight PPE0751-82 (6486-060515-393) Soil Sampled:05/15/0616:07 %Solids NCA SOP 80,8 ----- 1.00 %by lx 6050851 05/18/06 08:37 05/19/06 09:05 Weight TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager WWW .testaInerjcainc . com Page 144 of 18 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6050860 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6050860-BLKI) Extracted: 05/18/0609:26 Arsenic EPA 6020 ND --- 0.495 mg/kg wet ]x 05/31/06 22:33 LCS (6050860-BSI) Extracted: 05/18/0609:26 Arsenic EPA 6020 10.8 --- 0.485 mg/kg wet lx 9.71 111% (80-120) -- -- 05/31/06 22:40 Duplicate (6050860-DUPI) QC Source: PPE0751-01 Extracted: 05/18/06 09:26 Arsenic EPA 6020 9.41 --- 0.569 mg/kg dry lx 8.75 7.27%(40) 05/31/06 22:56 Matrix Spike (6050860-MSI) QC Source: PPE0751-01 Extracted: 05/18/06 09:26 Arsenic EPA 6020 22.8 --- 0.569 mg/kg dry Ix 8.75 11.4 123% (75-125) -- -- 05/31/06 23:03 Matrix Spike (6050860-MS2) QC Source: PPE0751-18 Extracted: 05/18/06 09:26 Arsenic EPA 6020 42.4 --- 0.611 mg/kg dry Ix 32.1 12.2 84.4% (75-125) -- -- 06/01/0600:41 QC Batch: 6050942 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike % (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6050942-BLKI) Extracted: 05/19/0611:38 Arsenic EPA 6020 ND --- 0.485 mg/kg wet Ix 05/24/06 16:07 LCS (6050942-BS1) Extracted: 05/19/0611:38 Arsenic EPA 6020 8.90 --- 0.476 mg/kg wet Ix 9.52 93.5% (80-120) -- -- 05/24/06 16:23 Duplicate (6050942-DUPI) QC Source: PPE0751-33 Extracted: 05/19/06 11:38 Arsenic EPA 6020 21.2 --- 1.39 mg/kg dry lx 21.5 1.41%(40) 05/24/06 17:09 Matrix Spike (6050942-MSl) QC Source: PPE0751-33 Extracted: 05/19/06 11:38 Arsenic EPA 6020 44.0 --- 1.37 mg/kg dry lx 21.5 27.4 82.1% (75-125) -- -- 05/24/06 21:48 Matrix Spike (6050942-MS2) QC Source: PPE0751-43 Extracted: 05/19/06 11:38 Arsenic EPA 6020 313 --- 0.584 mg/kg dry Ix 25.5 11.7 49.6% (75-125) -- -- 05/24/06 23:51 Q-03 TestAmerica-Portland,OR 'he results in this report apply to the samples analyzed in accordance with the chain ojcuslody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page 15 of 18 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6050943 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike o (Limits) */ (Limits) Analyzed Notes Result Amt REC RPD Blank (6050943-BLKI) Extracted: 05/19/0611:43 Arsenic EPA 6020 ND --- 0.515 mg/kg wet Ix 05/26/06 03:59 LCS (6050943-BSI) Extracted: 05/19/0611:43 Arsenic EPA 6020 11.7 --- 0.505 mg/kg wet lx 10.1 116% (80-120) -- -- 05/26/06 04:06 Duplicate (6050943-DUPI) QC Source: PPE0751-60 Extracted: 05/19/0611:43 Arsenic EPA 6020 8.34 --- 0.580 mg/kg dry Ix 10.2 -- -- -- 20.1%(40) 05/26/06 04:36 Matrix Spike (6050943-MSI) QC Source: PPE0751-60 Extracted: 05/19/06 11:43 Arsenic EPA 6020 20.9 --- 0.557 mg/kg dry Ix 10.2 11.1 96.4% (75-125) -- -- 05/26/06 04:51 Matrix Spike (6050943-MS2) QC Source: PPE0751-73 Extracted: 05/19/06 11:43 Arsenic EPA 6020 23.8 --- 0.681 mg/kg dry Ix 6.93 13.6 124% (75-125) -- -- 05/26/06 05:06 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain ojcusiody document This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager WWW .t e S t a m e r j c a j fl c . c O m Page 16 of 18 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE ph:(50 )90 .9 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Percent Dry Weight(Solids)per Standard Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6050851 Other dry Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike */ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Duplicate (6050851-DUPI) QC Source: PPE0751-54 Extracted: 05/18/0608:37 %Solids NCASOP 74.6 --- 1.00%by Weight Ix 77.1 3.30%(20) 05/19/0609:05 QC Batch: 6050852 Other dry Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Duplicate (6050852-DUPI) QC Source: PPE0751-01 Extracted: 05/18/0608:38 %Solids NCA SOP 87.0 --- 1.00%by Weight Ix 88.7 1.94%(20) 05/19/06 09:12 QC Batch: 6050854 Other dry Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Duplicate (6050854-DUPI) QC Source: PPE0751-50 Extracted: 05/18/06 08:39 %Solids NCA SOP 89.8 --- 1.00%by Weight lx 88.9 -- -- -- 1.01%(20) 05/19/0609:09 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcusiody document.This analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager WWW .teStamericainc . com Page 17 of 18 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING,CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/01/06 12:53 Notes and Definitions Report Specific Notes: Q-03 - The matrix spike recovery,and/or RPD,for this QC sample cannot be accurately calculated due to the high concentration of analyte already present in the source sample. Laboratory Reporting,Conventions: DET - Analyte DETECTED at or above the Reporting Limit. Qualitative Analyses only. ND - Analyte NOT DETECTED at or above the reporting limit(MDL or MRL,as appropriate). NR/NA - Not Reported/Not Available dry - Sample results reported on a Dry Weight Basis. Results and Reporting Limits have been corrected for Percent Dry Weight. wet Sample results and reporting limits reported on a Wet Weight Basis(as received). Results with neither'wet'nor'dry'are reported on a Wet Weight Basis. RPD - RELATIVE PERCENT DIFFERENCE (RPDs calculated using Results,not Percent Recoveries). MRL - METHOD REPORTING LIMIT. Reporting Level at,or above,the lowest level standard of the Calibration Table. MDL* - METHOD DETECTION LIMIT. Reporting Level at,or above,the statistically derived limit based on 40CFR,Part 136,Appendix B. *MDLs are listed on the report only if the data has been evaluated below the MRL. Results between the MDL and MRL are reported as Estimated Results. Dil - Dilutions are calculated based on deviations from the standard dilution performed for an analysis,and may not represent the dilution found on the analytical raw data. Reporting- Reporting limits(MDLs and MRI-s)are adjusted based on variations in sample preparation amounts,analytical dilutions and Limits percent solids,where applicable. Electronic - Electronic Signature added in accordance with TestAmerica's Electronic Reporting and Electronic Signatures Policy. Signature Application of electronic signature indicates that the report has been reviewed and approved for release by the laboratory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.7his analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager ldhl w w w .t e s t a m e r i c a i n c . c o m Page 18 of 18 'vestlimerica PORTLAND,OR E05 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAI TESTIN+G CORPORATtON ph:(503)906.9200 fax:(503)906.9210 June 30, 2006 Keary Knickerbocker Hahn and Associates, Inc. 434 NW Sixth Ave., Suite 203 Portland, OR 97209 RE: TIGDEQ Enclosed are the results of analyses for samples received by the laboratory on 05/16/06 17:30. The following list is a summary of the Work Orders contained in this report, generated on 06/30/06 18:20. If you have any questions concerning this report,please feel free to contact me. Work Order Project ProiectNumber PPE0751 - TIGDEQ 6486 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain $ ofcortody document.This analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa mericainc. com Pa9e1of10 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060515-274 PPE0751-07 Soil 05/15/06 09:50 05/16/06 17:30 6486-060515-278 PPE0751-11 Soil 05/15/0610:30 05/16/0617:30 6486-060515-280 PPE0751-13 Soil 05/15/0611:00 05/16/0617:30 6486-060515-284 PPE0751-17 Soil 05/15/0611:40 05/16/0617:30 6486-060515-287 PPE0751-20 Soil 05/15/06 12:20 05/16/06 17:30 6486-060515-293 PPE0751-26 Soil 05/15/0614:05 05/16/0617:30 6486-060515-296 PPE0751-29 Soil 05/15/06 14:30 05/16/06 17:30 6486-060515-299 PPE0751-32 Soil 05/15/0615:00 05/16/0617:30 6486-060515-302 PPE0751-35 Soil 05/15/0615:30 05/16/0617:30 6486-060515-305 PPE0751-38 Soil 05/15/0616:00 05/16/0617:30 6486-060515-352 PPE0751-41 Soil 05/15/06 09:03 05/16/06 17:30 6486-060515-356 PPE0751-45 Soil 05/15/06 09:36 05/16/06 17:30 6486-060515-359 PPE0751-49 Soil 05/15/0610:14 05/16/0617:30 6486-060515-362 PPE0751-52 Soil 05/15/0610:39 05/16/0617:30 6486-060515-365 PPE0751-55 Soil 05/15/0611:22 05/16/0617:30 6486-060515-365B PPE0751-56 Soil 05/15/0611:23 05/16/0617:30 .6486-060515-368 PPE0751-59 Soil 05/15/0611:56 05/16/0617:30 6486-060515-375 PPE0751-65 Soil 05/15/06 12:43 05/16/06 17:30 6486-060515-378 PPE0751-68 Soil 05/15/06 13:00 05/16/06 17:30 6486-060515-381 PPE0751-72 Soil 05/15/0614:24 05/16/0617:30 6486-060515-388 PPE0751-77 Soil 05/15/0615:12 05/16/0617:30 6486-060515-391 PPE0751-80 Soil 05/15/0615:36 05/16/0617:30 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa me r ica in c. co m Page 2of10 Tes,U�mericaPORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-07 (6486-060515-274) Soil Sampled:05/15/06 09:50 Arsenic EPA 6020 6,89 ----- 0.633 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 01:13 PPE0751-11 (6486-060515-278) Soil Sampled:05/15/0610:30 Arsenic EPA 6020 5,87 ----- 0.649 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 01:28 PPE0751-13 (6486-060515-280) Soil Sampled:05/15/0611:00 Arsenic EPA 6020 16.1 ----- 0.646 mg/kg dry Ix 6060815 06/19/06 16:40 06/28/06 01:36 PPE0751-17 (6486-060515-284) Soil Sampled:05/15/0611:40 Arsenic EPA 6020 13,3 ---- 0.639 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 01:43 PPE0751-20 (6486-060515-287) Soil Sampled:05/15/0612:20 Arsenic EPA 6020 11,7 ----- 0.721 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 01:51 PPE0751-26 (6486-060515-293) Soil Sampled:05/15/0614:05 Arsenic EPA 6020 101 ----- 0.925 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 01:58 PPE0751-29 (6486-060515-296) Soil Sampled:05/15/0614:30 Arsenic EPA 6020 29,8 --- 0.741 mg/kg dry Ix 6060815 06/19/06 16:40 06/28/06 02:28 PPE0751-32 (6486-060515-299) Soil Sampled:05/15/0615:00 Arsenic EPA 6020 8.93 ----- 0.611 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 02:36 PPE0751-35 (6486-060515-302) Soil Sampled:05/15/0615:30 Arsenic EPA 6020 7,87 ----- 0.635 mg/kg dry Ix 6060893 06/21/06 11:12 06/23/06 21:41 PPE0751-38 (6486-060515-305) Soil Sampled:05/15/0616:00 Arsenic EPA 6020 5.34 ----- 0.631 mg/kg dry lx 6060893 06/21/06 11:12 06/23/06 2327 PPE0751-41 (6486-060515-352) Soil Sampled:05/15/06 09:03 Arsenic EPA 6020 5,84 ----- 0.674 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/06 00:12 TestAmerica-Portland,OR 'he results in this report apply to the samples analyzed in accordance with the chain �Q of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager w w w .te 8ta rn e r i c a in c. co m Page3of10 PORTLAND,OR 9405 S.W.NIMBUS AVENUE Bh:(503 90 .9 97008-7132 9101u,-'%,sU�mericaANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-45 (6486-060515-356) Soil Sampled:05/15/06 09:36 Arsenic EPA 6020 7.64 ----- 0.609 mg/kg dry lx 6060893 06/21/06 11:12 06/24/06 00:27 PPE0751-49 (6486-060515-359) Soil Sampled:05/15/0610:14 Arsenic EPA 6020 5.53 ----- 0.628 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/06 00:43 PPE0751-52 (6486-060515-362) Soil Sampled:05/15/0610:39 Arsenic EPA 6020 6,36 ----- 0.713 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/06 00:58 PPE0751-55 (6486-060515-365) Soil Sampled:05/15/0611:22 Arsenic EPA 6020 6.31 ----- 0.654 mg/kg dry lx 6060893 06/21/06 11:12 06/24/06 01:13 PPE0751-56 (6486-060515-365B) Soil Sampled:05/15/0611:23 Arsenic EPA 6020 4,83 ----- 0.668 mg/kg dry ]x 6060893 06/21/06 11:12 06/24/06 01:29 PPE0751-59 (6486-060515-368) Soil Sampled:05/15/0611:56 Arsenic EPA 6020 17,1 ----- 0.678 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/060L44 PPE0751-65 (6486-060515-375) Soil Sampled:05/15/0612:43 Arsenic EPA 6020 9.64 --- 0.604 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/06 01:59 PPE0751-68 (6486-060515-378) Soil Sampled:05/15/0613:00 Arsenic EPA 6020 11,2 ----- 0.573 mg/kg dry lx 6060893 06/21/06 11:12 06/24/06 02:15 PPE0751-72 (6486-060515-381) Soil Sampled:05/15/0614:24 Arsenic EPA 6020 7,32 ----- 0.624 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/06 02:30 PPE0751-77 (6486-060515-388) Soil Sampled:05/15/0615:12 Arsenic EPA 6020 14.5 ----- 0.637 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/06 03:15 PPE0751-80 (6486-060515-391) Soil Sampled:05/15/0615:36 Arsenic EPA 6020 56.4 ----- 0.664 mg/kg dry Ix 6060893 06/21/06 11:12 06/24/06 03:30 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa mericainc. com Page 4of10 TestAmeriPORTLAND,OR/ / 9405 S.W.NIMBUS AVENUE ■V;l�.�!(. BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-07 (6486-060515-274) Soil Sampled:05/15/06 09:50 %Solids NCA SOP 78,2 ----- 1.00 %by lx 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-11 (6486-060515-278) Soil Sampled:05/15/0610:30 %Solids NCA SOP 74.8 ----- 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-13 (6486-060515-280) Soil Sampled:05/15/0611:00 %Solids NCA SOP 78,2 ----- 1.00 %by lx 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-17 (6486-060515-284) Soil Sampled:05/15/0611:40 %Solids NCA SOP 76.0 ----- 1.00 %by Ix 6060472 06/12/0611:07 06/13/0610:04 Weight PPE0751-20 (6486-060515-287) Soil Sampled:05/15/0612:20. %Solids NCA SOP 70,8 ----- 1.00 %by lx 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-26 (6486-060515-293) Soil Sampled:05/15/0614:05 %Solids NCA SOP 55.7 ----- 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-29 (6486-060515-296) Soil Sampled:05/15/0614:30 %Solids NCA SOP 68,2 ----- 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-32 (6486-060515-299) Soil Sampled:05/15/0615:00 %Solids NCA SOP 79.5 ----- 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-35 (6486-060515-302) Soil Sampled:05/15/0615:30 %Solids NCA SOP 78.8 — 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-38 (6486-060515-305) Soil Sampled:05/15/0616:00 %Solids NCA SOP 78,4 ----- 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 Weight PPE0751-41 (6486-060515-352) Soil Sampled:05/15/06 09:03 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager w w .te s t a m e r i c a in c. co m Page 5of10 j\ �erica PORTLAND,OR 9405 S.W.NIMBUS AVENUE ieu—t/ ph:(50 )90 .9 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-41 (6486-060515-352) Soil Sampled:05/15/06 09:03 %Solids NCA SOP 78,1 ----- 1.00 %by Ix 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-45 (6486-060515-356) Soil Sampled:05/15/06 09:36 %Solids NCA SOP 78,9 ----- 1.00 %by Ix 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-49 (6486-060515-359) Soil Sampled:05/15/0610:14 %Solids NCA SOP 79,6 ----- 1.00 %by ]x 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-52 (6486-060515-362) Soil Sampled:05/15/0610:39 %Solids NCA SOP 73,8 ----- 1.00 %by lx 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-55 (6486-060515-365) Soil Sampled:05/15/0611:22 %Solids NCA SOP 74,9 ----- 1.00 %by Ix 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-56 (6486-060515-365B) Soil Sampled:05/15/0611:23 %Solids NCA SOP 77,2 ----- 1.00 %by Ix 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-59 (6486-060515-368) Soil Sampled:05/15/0611:56 %Solids NCA SOP 73,0 ----- 1.00 %by lx 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-65 (6486-060515-375) Soil Sampled:05/15/0612:43 %Solids NCA SOP 78,8 ----- 1.00 %by lx 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-68 (6486-060515-378) Soil Sampled:05/15/0613:00 %Solids NCA SOP 83,1 ----- 1.00 %by Ix 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-72 (6486-060515-381) Soil Sampled:05/15/0614:24 %Solids NCASOP 78,6 ----- 1.00 %by lx 6060471 06/12/0611:04 06/13/0610:10 Weight PPE0751-77 (6486-060515-388) Soil Sampled:05/15/0615:12 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericaInc. com Page6of10 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-77 (6486-060515-388) Soil Sampled:05/15/0615:12 %Solids NCA SOP 77,0 ----- 1.00 °/by Ix 6060471 06/12/06 11:04 06/13/06 10:10 Weight PPE0751-80 (6486-060515-391) Soil Sampled:05/15/0615:36 %Solids NCA SOP 74.5 ----- 1.00 °/by lx 6060471 06/12/06 11:04 06/13/06 10:10 Weight TestAmerica-Portland,OR he results in this report apply to 1he samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc. com Page 7of10 �/, ,�C1 'Y'1 PORTLAND,OR 9405 S.W.NIMBUS AVENUE ����--JJ!![1��T ��`` ii,J'(►•,,'/� BEAVERTON,OR97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALVTICAI TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6060815 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike */ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6060815-BLKI) Extracted: 06119/0616:40 Arsenic EPA 6020 ND --- 0.526 mg/kg wet Ix 06/27/06 22:21 LCS (6060815-BSI) Extracted: 06/19/0616:40 Arsenic EPA 6020 11.9 --- 0.526 mg/kg wet Ix 10.5 113% (80-120) -- -- 06/27/06 22:29 Duplicate (6060815-DUPI) QC Source: PPE0584-04 Extracted: 06/19/06 16:40 Arsenic EPA 6020 4.65 --- 0.610 mg/kg dry Ix 4.96 -- -- -- 6.45%(40) 06/27/06 22:44 Matrix Spike (6060815-MSI) QC Source: PPE0584-04 Extracted: 06/19/0616:40 Arsenic EPA 6020 15.2 --- 0.581 mg/kg dry Ix 4.96 11.6 88.3% (75-125) -- -- 06/27/06 23:21 Matrix Spike (6060815-MS2) QC Source: PPE0751-07 Extracted: 06/19/06 16:40 Arsenic EPA 6020 19.6 --- 0.673 mg/kg dry Ix 6.89 13.5 94.1% (75-125) -- -- 06/28/06 01:21 QC Batch: 6060893 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits)Analyzed Notes Result Amt REC RPD Blank (6060893-BLKI) Extracted: 06/21/0611:12 Arsenic EPA 6020 ND --- 0.521 mg/kg wet IX 06/23/06 21:09 LCS (6060893-BSI) Extracted: 06/21/0611:12 Arsenic EPA 6020 11.5 --- 0.510 mg/kg wet Ix 10.2 113% (80-120) -- -- 06/23/06 21:25 Duplicate (6060893-DUPI) QC Source: PPE0751-35 Extracted: 06/21/06 11:12 Arsenic EPA 6020 6.75 --- 0.641 mg/kg dry 1 x 7.87 -- -- -- 15.3%(40) 06/23/06 21:56 Matrix Spike (6060893-MSI) QC Source: PPE0751-35 Extracted: 06/21/06 11:12 Arsenic EPA 6020 20.1 --- 0.641 mg/kg dry Ix 7.87 12.8 95.5% (75-125) -- -- 06/23/06 22:11 Matrix Spike (6060893-MS2) QC Source: PPF0821-01 Extracted: 06/21/06 11:12 Arsenic EPA 6020 33.5 --- 0.676 mg/kg dry Ix 19.6 13.5 103% (75-125) -- -- 06/23/06 22:57 TestAmerica-Portland,OR he results in this report apply to the.samples analyzed in accordance with the chain ojcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa me r ica in c. co m Page8of10 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Percent Dry Weight(Solids)per Standard Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6060471 Soil Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Duplicate (6060471-DUPI) QC Source: PPE0751-41 Extracted: 06/12/06 11:04 %Solids NCA SOP 78.8 --- 1.00%by Weight Ix 78.1 0.892%(20) 06/13/0610:10 QC Batch: 6060472 Soil Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Duplicate (6060472-DUPI) QC Source: PPE0584-04 Extracted: 06/12/06 11:07 %Solids NCASOP 83.9 -- 1.00%by Weight Ix 83.6 0.358%(20) 06/13/06 10:04 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager =111111- w w w .t s t a m e r Ica in c. co m page 9of10 ►ICI '1C/1 PORTLAND,OR BEA S.W.NIMBUS AVENUE llJ• i�.�.l ■V,,RF.'i(. BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:20 Notes and Definitions Report Specific Notes: None Laboratory Reporting Conventions: DET - Analyte DETECTED at or above the Reporting Limit. Qualitative Analyses only. ND - Analyte NOT DETECTED at or above the reporting limit(MDL or MRL,as appropriate). NR/NA - Not Reported/Not Available dry - Sample results reported on a Dry Weight Basis. Results and Reporting Limits have been corrected for Percent Dry Weight. wet Sample results and reporting limits reported on a Wet Weight Basis(as received). Results with neither'wet'nor'dry'are reported - on a Wet Weight Basis. RPD - RELATIVE PERCENT DIFFERENCE (RPDs calculated using Results,not Percent Recoveries). MRL - METHOD REPORTING LIMIT. Reporting Level at,or above,the lowest level standard of the Calibration Table. MDL* - METHOD DETECTION LIMIT. Reporting Level at,or above,the statistically derived limit based on 40CFR,Part 136,Appendix B. *MDLs are listed on the report only if the data has been evaluated below the MRL..Results between the MDL and MRL are reported as Estimated Results. Dil - Dilutions are calculated based on deviations from the standard dilution performed for an analysis,and may not represent the dilution found on the analytical raw data. Reporting- Reporting limits(MDLs and MRLs)are adjusted based on variations in sample preparation amounts,analytical dilutions and Limits percent solids,where applicable. Electronic - Electronic Signature added in accordance with TestAmerica's Electronic Reporting and Electronic Signatures Policy. Signature Application of electronic signature indicates that the report has been reviewed and approved for release by the laboratory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain Q ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager w w w .te s t a m e r i c a in c. co m Page 10 of 10 PORTLAND,OR 9405 S.W.NIMBUS AVENUEt 1lerica BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 August 11, 2006 Keary Knickerbocker Hahn and Associates, Inc. 434 NW Sixth Ave., Suite 203 Portland, OR 97209 RE: TIGDEQ Enclosed are the results of analyses for samples received by the laboratory on 05/16/06 17:30. The following list is a summary of the Work Orders contained in this report, generated on 08/11/06 19:30. If you have any questions concerning this report,please feel free to contact me. Work Order Proiect ProiectNumber PPE0751 TIGDEQ 6486 TestAmerica-Portland,OR "he results in this report apply to the samples analyzed in accordance with the chain * ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc. com Page Iof7 � }'��/"y(j PORTLAND,OR 9405 S.W.NIMBUS AVENUE ^ ■■\�.11��Cr.'� ph:(50 )90 .9 97008-7132 rfu,---stAANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:30 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060515-281 PPE0751-14 Soil 05/15/0611:10 05/16/0617:30 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa me r ica in c. co m Page2of7 PORTLAND,OR 9405 S.W.NIMBUS AVENUE TestAmerica BEAVERTON,OR 97008-7132 ANALYTICAI TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:30 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0751-14 (6486-060515-281) Soil Sampled:05/15/06 11:10 Arsenic EPA 6020 24,6 ----- 0.625 mg/kg dry lx 6070776 07/20/06 09:30 07/21/06 18:14 TestAmerica-Portland,OR 'he results in this report apply to the samples analyzed in accordance with the chain ojcusiody document.7his analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa m e r ica in c. co m Page3of7 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:30 Percent Dry Weight(Solids)per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analvzed Notes PPE0751-14 (6486-060515-281) Soil Sampled:05/15/0611:10 %Solids NCA SOP 76.2 ----- 0.00 %by lx 6070804 07/20/06 09:29 07/20/06 09:29 HT-1 Weight TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcuslody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa m e r i c a i n c. c o m Page 4 of 7 Tes tAmerica PORTLAND,OR 9405 s.w.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph;(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:30 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6070776 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike */ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6070776-BLK1) Extracted: 07/20/0609:30 Arsenic EPA 6020 ND --- 0.495 mg/kg wet lx 07/21/06 09:24 LCS (6070776-BSI) Extracted: 07/20/06 09:30 Arsenic EPA 6020 10.8 --- 0.505 mg/kg wet lx 10.1 107% (80-120) -- -- 07/21/06 09:40 Duplicate (6070776-DUPl) QC Source: PPG0717-01 Extracted: 07/20/0609:30 Arsenic EPA 6020 6.21 --- 0.560 mg/kg dry Ix 4.01 43.1%(40) 07/21/06 10:10 Q-14 Matrix Spike (6070776-MS1) QC Source: PPG0717-01 Extracted: 07/20/06 09:30 Arsenic EPA 6020 13.6 --- 0.560 mg/kg dry Ix 4.01 11.2 85.6% (75-125) -- -- 07/21/06 10:25 Matrix Spike (6070776-MS2) QC Source: PPG0735-03 Extracted: 07/20/06 09:30 Arsenic EPA 6020 13.9 --- 0.525 mg/kg dry lx 5.21 10.5 82.8% (75-125) -- -- 07/21/06 10:54 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report most be reprodoced in its entirety. Roxanne L.Clifton,Project Manager www .testa mericainc. com Page 5of7 m 'TesU� rica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:30 Percent Dry Weight(Solids)per Standard Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6070804 Other wet Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike */ (Limits) °/ (Limits)Analyzed Notes Result Amt REC RPD Duplicate (6070804-DUP1) QC Source: PPE0584-43 Extracted: 07/20/0609:29 Solids NCA SOP 78.2 --- 0.00%by Weight Ix 78.1 0.128%(20) 07/20/0609:29 TestAmerica-Portland,OR fhe results in this report apply to the samples analyzed in accordance with the chain ojcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa m e r i c a i n c. c o m Page 6 of 7 es �►meric PORTLAND,OR 9405 S.W.NIMBUS AVENUE estAmerica BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 08/11/06 19:30 Notes and Definitions Report Specific Notes: HT-1 - Sample analysis performed past method-specified holding time. Q-14 - The matrix spike recovery,and/or RPD,for this QC sample is outside of control limits due to a non-homogeneous sample matrix. Laboratory Reporting Conventions: DET - Analyte DETECTED at or above the Reporting Limit. Qualitative Analyses only. ND - Analyte NOT DETECTED at or above the reporting limit(MDL or MRL,as appropriate). NR/NA - Not Reported/Not Available dry - Sample results reported on a Dry Weight Basis. Results and Reporting Limits have been corrected for Percent Dry Weight. wet Sample results and reporting limits reported on a Wet Weight Basis(as received). Results with neither'wet'nor'dry'are reported on a Wet Weight Basis. RPD - RELATIVE PERCENT DIFFERENCE (RPDs calculated using Results,not Percent Recoveries). MRL - METHOD REPORTING LIMIT. Reporting Level at,or above,the lowest level standard of the Calibration Table. MDL* - METHOD DETECTION LIMIT. Reporting Level at,or above,the statistically derived limit based on 40CFR,Part 136,Appendix B. *MDLs are listed on the report only if the data has been evaluated below the MRL. Results between the MDL and MRL are reported as Estimated Results. Dil - Dilutions are calculated based on deviations from the standard dilution performed for an analysis,and may not represent the dilution found on the analytical raw data. Reporting- Reporting limits(MDLs and MRLs)are adjusted based on variations in sample preparation amounts,analytical dilutions and Limits percent solids,where applicable. Electronic - Electronic Signature added in accordance with TestAmerica's Electronic Reporting and Electronic Signatures Policy. Signature Application of electronic signature indicates that the report has been reviewed and approved for release by the laboratory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain ofeustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa m e r i c a in c. c o m Page 7 of 7 APPENDIX A Laboratory Analytical Reports and Chain-of-Custody Documentation May 2006 Soil Samples HAHN AND ASSOCIATES, INC. HAHN AND ASSOCIATES, INC. Laboratory t f rn��t CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax(503)227-2209 Project Manager i G Liquid with Sediment Sample Samples Received at 4C (Y or N) _ Project No. G y. Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name 774A5LW Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyses to be Performed Sample Number Prefix: I sn r J c4 ki 0 �N t E N Lab ID Sample# Date Time Sample Description Remarks -2-o-'D k Zt� 011 z 0.--7 oaf- so Ar 3— Zv -- u; s Z S- zf Zf I 0 5- s" Z t kR nquished H And Associates,Inc. D to Ti a Receiv by Company ?1 a�nquis ed byCompany 15at6 Time Received by Company HAHN AND ASSOCIATES, INC. Laboratory JCHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax(503)227-2209 Project Manager Lf d Et - Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyses to be Performed Sample Number Prefix:&41& 12 ��, /j�-- I e C E s coon 5 Q i5 z' Lab ID Sample 0 Date Time Sample Description Remarks ro o>; j2o 3 S--w l -Z 21 5 L 0 S-1.5` 15W At, 2z f SSZ Z �vL � Relinquished b Hah nd Associates,Inc. �;�o / Time Recei by Comp ny P / U Relinqui ed by Company Date Time Received by Compan 1��3� � L HAHN AND ASSOCIATES, INC. Laboratory TestAmerica CHAIN OF MtTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203-Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717-Fax(503)227-2209 Project Manager Keary Knickerbocker Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. 6486 Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name TIGDEQ Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyse to be Performed Sample Number Prefix: 6486-0605// I I � I m C .R� I v I V I ar EN in S < b z' Lab ID Sample# Date Time Sample Description Remarks X1 I I >C 0 0 P5 Am - 1 a9Uo wt - I �{ 2 33 3 .5-Z. 5` k a3 o Relinquish y Hahn ndAssociates,Inc. Date Time Receiv O Company Relinquwshe y Company ate f Time Received by Company HAHN AND ASSOCIATES, INC. Laboratory C14AIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No, Chain of Custody No. (503)796-0717•Fax 503)227-2209 Project Manager ' Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. (✓ Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide Verbal Results (Y or N) Collected by lien Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyse to be Performed Sample Number Prefix:(� �,,_v /�— >n I J S 0 � E V Qs Z < Lab ID Sample# Date Time Sample Description Remarks of 3 // t7b tz o Z -1 23 z4 -L h Z4/ i > 3- Z�Z / /fir O-- I Z" /37-0 A,r 2 3?-4 SL� /332,- 2 O-- Relinquished b Hahnfand Associates,Inc. ate Time Ree ei y Comparly- 15) 2 d 1,111,119 Relinquished by Company D Time Received by Comp' HAHN AND ASSOCIATES, INC. Laboratory CHAIN—OF CUT D Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax 503)227-2209 Project ManagerMZ1 Liquid with Sediment Sample Samples Received at 4C (Y or N) Project N0. o Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name _27 /�� Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyses to be Performed Sample Number Prefix: W6,_(7G,e 51/ - c� a E z Lab 10 Sample# Date Time Sample Description Remarks Z X I I I.- w �uv Z 2-3 253.h 1 y�l 2 4y -2 k 2s U a Z-3 Relinquish y H and Associates,Inc. D to Time Receiv Comp Z5�� 5!�' Relinquished by Company Datif Time Received by I an Com P Y 2L 7- HAHN AND ASSOCIATES, INC. Laboratory CHAIN OF CUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717•Fax(503)227-2209 Project Manager , {y ;- Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyses to be Performed Sample Number Prefix: . to .V U o Q) ` L N U) S 2 Lab ID Sample# Date Time Sample Description l Remarks Z q4 S� Z 1 jao lot, E Z I �Z o d - 1 �� s a- Relinquish Hahof and Associates,Inc. Datq Time Reeei y Comps,n ZLZ--& el 0 Relinquished by Company Date Time Received by compani /45ii HAHN AND ASSOCIATES, INC. Laboratory -Iri C _ CHAIN OF tUSTODY Environmental Consultants 434 NW Sixth Avenue,Suite 203•Portland OR 97209 Lab Project No. Chain of Custody No. (503)796-0717-Fax(503)227-2209 Project Manager _ Liquid with Sediment Sample Samples Received at 4C (Y or N) Project No. 6 L(klp Test Filtrate Test Sediment Test Both Appropriate Containers Used (Y or N Project Name Multi-Phase Sample Provide Verbal Results (Y or N) Collected by Ben Uhl Test One(which) Test Separately Shake Provide Preliminary Fax Results Comments Matrix Analyses to be Performed Sample Number Prefix: 7-- I A 0 o E H � E Q s Z Lab ID Sample# Date Time Sample Description j Remarks 9-(o Io 5 j 2 01° 1100 -� -Z i )� i CA Relinquish y Hahn and Associates,Inc. Time Recti Company S7 �� I Relinquished by Company Date Time Received by Comp ny Z % . 3 TAT Non-Conformances? Circle Y or N (If Y, see other side) TEST AMERICA SAMPLE RECEIPT CHECKLIST Received By: Logged-in By: Unpacked/Labeled By: Cooler ID: ( of (applies in temp at receipt) i Date: /2 /[� Date: Date��-0K1 Work Order No Time: G SJ Initials: Initials Client: _14aa o, Initials: /-�5/ JF Project: Co tainer Type. COC Seals: Packing Matenal _ Cooler Ship. Container Sign By Bubble Bags Styrofoam Box On Bottles Date Foam Packs None/Other None None/Other Other. Re i erant: Received Via: Bill# Gel Ice Pack None Fed Ex Client Loose ice UPS X NCA Courier None/Other DHL � Mid Valley Senvoy TDP --� GS Other Cooler Temperature (IR).- J °C Plastic CGDlass (Frozen filters, Tedlars and aqueous Metals exempt) (circle Temperature Blank? 'C or NA Trip Blank? Y or N or NA Sample Containers: ID ID Intact? Y & N Metals Preserved? Y or No A Provided by NCA? Y or N Client QAPP Preserved? Y or No Correct Type" Y orN Adequate Volume? 0Y0 N I (for tests requested) #Containers match COC? Y or!' N Water VOAs: Headspace? Y or N oNA IDs/timeidate match COC? Y of N Comments: Hold Times in hold? Yr N PROJECT MANAGEMENT Is the Chain of Custody complete? Y or N If N, circle the items that were incomplete Comments.Problems Total access set up? Y or N Has client been contacted regarding non-conformances? Y or N If Y. J Date Time PM Initials Date: Time: (rev 3. 09'12/05) PORTLAND,OS.W.NIMBUS AVENUE BEAVERTON,OR 97008-713 2TestAmerica ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 May 26, 2006 Keary Knickerbocker Hahn and Associates, Inc. 434 NW Sixth Ave., Suite 203 Portland, OR 97209 RE: TIGDEQ Enclosed are the results of analyses for samples received by the laboratory on 05/12/06 14:35. The following list is a summary of the Work Orders contained in this report, generated on 05/26/06 17:16. If you have any questions concerning this report,please feel free to contact me. Work Order Project ProiectNumber PPE0584 TIGDEQ 6486 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain .y of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .te s t a m e r j ca j rl c . co m Pagel of 17 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060510-200 PPE0584-01 Soil 05/10/06 08:19 05/12/06 14:35 6486-060510-201 PPE0584-02 Soil 05/10/06 08:55 05/12/06 14:35 6486-060510-202 PPE0584-03 Soil 05/10/06 09:06 05/12/06 14:35 6486-060510-207 PPE0584-05 Soil 05/10/0610:07 05/12/0614:35 6486-060510-208 PPE0584-06 Soil 05/10/0610:32 05/12/0614:35 6486-060510-209 PPE0584-07 Soil 05/10/0610:40 05/12/0614:35 6486-060510-210 PPE0584-08 Soil 05/10/0610:52 05/12/0614:35 6486-060510-211 PPE0584-09 Soil 05/10/0611:03 05/12/0614:35 6486-060510-215 PPE0584-10 Soil 05/10/0612:00 05/12/0614:35 6486-060510-215b PPE0584-11 Soil 05/10/06 12:01 05/12/06 14:35 6486-060510-216 PPE0584-12 Soil 05/10/0613:42 05/12/0614:35 6486-060510-217 PPE0584-13 Soil 05/10/0613:47 05/12/0614:35 6486-060510-218 PPE0584-14 Soil 05/10/0613:55 05/12/0614:35 6486-060510-223 PPE0584-16 Soil 05/10/0615:17 05/12/0614:35 6486-060510-224 PPE0584-17 Soil 05/10/0615:36 05/12/0614:35 6486-060510-225 PPE0584-18 Soil 05/10/0615:44 05/12/0614:35 6486-060510-226 PPE0584-19 Soil 05/10/0615:52 05/12/0614:35 6486-060510-227 PPE0584-20 Soil 05/10/0616:00 05/12/0614:35 6486-060510-228 PPE0584-21 Soil 05/11/06 08:44 05/12/06 14:35 6486-060510-229 PPE0584-22 Soil 05/11/06 08:48 05/12/06 14:35 6486-060510-230 PPE0584-23 Soil 05/11/06 08:55 05/12/06 14:35 6486-060510-232 PPE0584-25 Soil 05/11/06 09:24 05/12/06 14:35 6486-060510-233 PPE0584-26 Soil 05/11/06 09:33 05/12/06 14:35 6486-060510-235 PPE0584-28 Soil 05/11/0610:32 05/12/0614:35 6486-060510-236 PPE0584-29 Soil 05/11/0610:43 05/12/0614:35 6486-060510-237 PPE0584-30 Soil 05/11/06 10:51 05/12/06 14:35 6486-060510-238 PPE0584-31 Soil 05/11/0612:44 05/12/0614:35 6486-060510-238b PPE0584-32 Soil 05/11/0612:45 05/12/0614:35 6486-060510-239 PPE0584-33 Soil 05/11/0612:49 05/12/0614:35 6486-060510-242 PPE0584-36 Soil 05/11/0613:15 05/12/0614:35 6486-060510-243 PPE0584-37 Soil 05/11/0613:20 05/12/0614:35 6486-060510-246 PPE0584-40 Soil 05/11/0613:56 05/12/0614:35 6486-060510-247 PPE0584-41 Soil 05/11/0613:59 05/12/0614:35 6486-060510-250 PPE0584-44 Soil 05/11/0614:18 05/12/0614:35 6486-060510-251 PPE0584-45 Soil 05/11/0614:23 05/12/0614:35 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain �i of custody document.This analytical report must be reproduced in as entirety. Roxanne L.Clifton,Project Manager www .testa me rica in c . co m Pagr2of17 PORTLAND,OR 9405 S.W.NIMBUS AVENUE TesjU�merica BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060510-253 PPE0584-47 Soil 05/11/0614:40 05/12/0614:35 6486-060510-253b PPE0584-48 Soil 05/11/06 14:41 05/12/06 14:35 6486-060510-254 PPE0584-49 Soil 05/11/0614:47 05/12/0614:35 6486-060510-256 PPE0584-51 Soil 05/12/06 09:42 05/12/06 14:35 6486-060510-257 PPE0584-52 Soil 05/12/06 09:47 05/12/06 1435 6486-060510-259 PPE0584-54 Soil 05/12/0610:03 05/12/0614:35 6486-060510-260 PPE0584-55 Soil 05/12/0610:07 05/12/0614:35 6486-060510-262 PPE0584-57 Soil 05/12/0610:32 05/12/0614:35 6486-060510-263 PPE0584-58 Soil 05/12/0610:37 05/12/0614:35 6486-060510-265 PPE0584-60 Soil 05/12/0610:55 05/12/0614:35 6486-060510-266 PPE0584-61 Soil 05/12/0611:00 05/12/0614:35 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcusiody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page 3of17 ■ ►� �'1 PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVER■LJ ■c ph:(50 ON,)90 .9 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analvte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-01 (6486-060510-200) Soil Sampled:05/10/06 08:19 Arsenic EPA 6020 4.93 ----- 0.541 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 17:30 PPE0584-02 (6486-060510-201) Soil Sampled:05/10/06 08:55 Arsenic EPA 6020 5.50 ---- 0.573 mg/kg dry Ix 6050694 05/15/06 11:46 05/24/06 18:00 PPE0584-03 (6486-060510-202) Soil Sampled:05/10/06 09:06 Arsenic EPA 6020 7,12 ----- 0.606 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 18:07 PPE0584-05 (6486-060510-207) Soil Sampled:05/10/0610:07 Arsenic EPA 6020 9,37 ----- 0.600 mg/kg dry Ix 6050694 05/15/06 11:46 05/24/06 18:14 PPE0584-06 (6486-060510-208) Soil Sampled:05/10/0610:32 Arsenic EPA 6020 4,82 ---- 0.622 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 18:37 PPE0584-07 (6486-060510-209) Soil Sampled:05/10/0610:40 Arsenic EPA 6020 6.03 ----- 0.611 mg/kg dry 1x 6050694 05/15/06 11:46 05/24/06 18:44 PPE0584-08 (6486-060510-210) Soil Sampled:05/10/0610:52 Arsenic EPA 6020 6.39 ----- 0.673 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 18:52 PPE0584-09 (6486-060510-211) Soil Sampled:05/10/0611:03 Arsenic EPA 6020 6.07 ----- 0.612 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 18:59 PPE0584-10 (6486-060510-215) Soil Sampled:05/10/0612:00 Arsenic EPA 6020 4.96 ---- 0.598 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 19:07 PPE0584-I1 (6486-060510-215b) Soil Sampled:05/10/0612:01 Arsenic EPA 6020 5.43 ----- 0.605 mg/kg dry Ix 6050694 05/15/06 11:46 05/24/06 19:14 PPE0584-12 (6486-060510-216) Soil Sampled:05/10/0613:42 Arsenic EPA 6020 5.16 ----- 0.586 mg/kg dry ]x 6050694 05/15/06 11:46 05/24/06 19:22 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcuslody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .testamericainc . com Page4of17 � � PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANAL"CAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analvte Method Result MDL* MRL Units Dil Batch Prepared Analvzed Notes PPE0584-13 (6486-060510-217) Soil Sampled:05/10/0613:47 Arsenic EPA 6020 47,6 ----- 0.637 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 19:36 PPE0584-14 (6486-060510-218) Soil Sampled:05/10/0613:55 Arsenic EPA 6020 17,7 ----- 0.646 mg/kg dry Ix 6050694 05/15/06 11:46 05/24/06 19:44 PPE0584-16 (6486-060510-223) Soil Sampled:05/10/0615:17 Arsenic EPA 6020 32,0 ----- 0.655 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 20:06 PPE0584-17 (6486-060510-224) Soil Sampled:05/10/0615:36 Arsenic EPA 6020 6,72 ----- 0.629 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 20:14 PPE0584-18 (6486-060510-225) Soil Sampled:05/10/0615:44 Arsenic EPA 6020 7,93 ----- 0.640 mg/kg dry Ix 6050694 05/15/06 11:46 05/24/06 20:21 PPE0584-19 (6486-060510-226) Soil Sampled:05/10/0615:52 Arsenic EPA 6020 7,63 ----- 0.651 mg/kg dry Ix 6050694 05/15/06 11:46 05/24/06 20:29 PPE0584-20 (6486-060510-227) Soil Sampled:05/10/0616:00 Arsenic EPA 6020 3.85 ----- 0.617 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 20:36 PPE0584-21 (6486-060510-228) Soil Sampled:05/11/06 08:44 Arsenic EPA 6020 9.36 ---- 0.586 mg/kg dry Ix 6050694 05/15/06 11:46 05/24/06 20:44 PPE0584-22 (6486-060510-229) Soil Sampled:05/11/06 08:48 Arsenic EPA 6020 12,5 ----- 0.583 mg/kg dry lx 6050694 05/15/06 11:46 05/24/06 20:51 PPE0584-23 (6486-060510-230) Soil Sampled:05/11/06 08:55 Arsenic EPA 6020 9.90 ----- 0.604 mg/kg dry lx 6050695 05/15/06 11:49 05/24/06 21:14 PPE0584-25 (6486-060510-232) Soil Sampled:05/11/06 09:24 Arsenic EPA 6020 54.3 ---- 0.686 mg/kg dry lx 6050695 05/15/06 11:49 05/24/06 21:59 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .te s t a m e r Ica j n c . co m Page5of17 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Total Metals per EPA 6000ncl00 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-26 (6486-060510-233) Soil Sampled:05/11/06 09:33 Arsenic EPA 6020 17,6 ----- 0.653 mg/kg dry lx 6050695 05/15/06 11:49 05/24/06 22:06 PPE0584-28 (6486-060510-235) Soil Sampled:05/11/0610:32 Arsenic EPA 6020 58.5 ----- 0.661 mg/kg dry ]x 6050695 05/15/06 11:49 05/24/06 22:14 PPE0584-29 (6486-060510-236) Soil Sampled:05/11/0610:43 Arsenic EPA 6020 19.1 ----- 0.716 mg/kg dry ]x 6050695 05/15/06 11:49 05/24/06 22:21 PPE0584-30 (6486-060510-237) Soil Sampled:05/11/0610:51 Arsenic EPA 6020 26,8 ----- 0.623 mg/kg dry Ix 6050695 05/15/06 11:49 05/24/06 22:29 PPE0584-31 (6486-060510-238) Soil Sampled:05/11/0612:44 Arsenic EPA 6020 4.25 ----- 0.606 mg/kg dry lx 6050695 05/15/06 11:49 05/24/06 22:36 PPE0584-32 (6486-060510-238b) Soil Sampled:05/11/0612:45 Arsenic EPA 6020 4,81 ---- 0.590 mg/kg dry lx 6050695 05/15/06 11:49 05/24/06 22:44 PPE0584-33 (6486-060510-239) Soil Sampled:05/11/0612:49 Arsenic EPA 6020 5.79 ----- 0.601 mg/kg dry Ix 6050695 05/15/06 11:49 05/24/06 23:06 PPE0584-36 (6486-060510-242) Soil Sampled:05/11/0613:15 Arsenic EPA 6020 3.70 ----- 0.586 mg/kg dry Ix 6050695 05/15/06 11:49 05/24/06 23:13 PPE0584-37 (6486-060510-243) Soil Sampled:05/11/0613:20 Arsenic EPA 6020 4.80 ----- 0.590 mg/kg dry Ix 6050695 05/15/06 11:49 05/24/06 23:21 PPE0584-40 (6486-060510-246) Soil Sampled:05/11/0613:56 Arsenic EPA 6020 12.4 ----- 0.582 mg/kg dry Ix 6050695 05/15/06 11:49 05/24/06 23:36 PPE0584-41 (6486-060510-247) Soil Sampled:05/11/0613:59 Arsenic EPA 6020 25,7 ---- 0.676 mg/kg dry lx 6050695 05/15/06 11:49 05/24/06 23:43 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page6of17 � � PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTINCo OORPORATEON Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-44 (6486-060510-250) Soil Sampled:05/11/06 14:18 Arsenic EPA 6020 5.55 ----- 0.622 mg/kg dry ]x 6050695 05/15/06 11:49 05/24/06 23:51 PPE0584-45 (6486-060510-251) Soil Sampled:05/11/0614:23 Arsenic EPA 6020 18.1 ----- 0.657 mg/kg dry ]x 6050695 05/15/06 11:49 05/24/06 23:58 PPE0584-47 (6486-060510-253) Soil Sampled:05/11/0614:40 Arsenic EPA 6020 11,9 ----- 0.592 mg/kg dry Ix 6050695 05/15/06 11:49 05/25/06 00:06 PPE0584-48 (6486-060510-253b) Soil Sampled:05/11/0614:41 Arsenic EPA 6020 14,8 ----- 0.571 mg/kg dry lx 6050695 05/15/06 11:49 05/25/06 00:13 PPE0584-49 (6486-060510-254) Soil Sampled:05/11/0614:47 Arsenic EPA 6020 4.64 ----- 0.648 mg/kg dry Ix 6050695 05/15/06 11:49 05/25/06 00:36 PPE0584-51 (6486-060510-256) Soil Sampled:05/12/06 09:42 Arsenic EPA 6020 6,47 ----- 0.572 mg/kg dry Ix 6050695 05/15/06 11:49 05/25/06 00:43 PPE0584-52 (6486-060510-257) Soil Sampled:05/12/06 09:47 Arsenic EPA 6020 9.34 — 0.627 mg/kg dry Ix 6050695 05/15/06 11:49 05/25/06 00:51 PPE0584-54 (6486-060510-259) Soil Sampled:05/12/0610:03 Arsenic EPA 6020 13.8 ----- 0.652 mg/kg dry Ix 6050737 05/16/06 09:25 05/25/06 01:13 PPE0584-55 (6486-060510-260) Soil Sampled:05/12/0610:07 Arsenic EPA 6020 15.4 ----- 0.717 mg/kg dry Ix 6050737 05/16/06 09:25 05/25/06 01:43 PPE0584-57 (6486-060510-262) Soil Sampled:05/12/0610:32 Arsenic EPA 6020 4.86 ---- 0.581 mg/kg dry lx 6050737 05/16/06 09:25 05/25/06 11:46 PPE0584-58 (6486-060510-263) Soil Sampled:05/12/0610:37 Arsenic EPA 6020 44.0 ----- 0.649 mg/kg dry lx 6050737 05/16/06 09:25 05/25/06 11:54 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager WWW .teStamericainc . com Page 7of17 PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 TestAmericaph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-60 (6486-060510-265) Soil Sampled:05/12/0610:55 Arsenic EPA 6020 4.46 ----- 0.584 mg/kg dry Ix 6050737 05/16/06 09:25 05/25/06 12:01 PPE0584-61 (6486-060510-266) Soil Sampled:05/12/0611:00 Arsenic EPA 6020 30.2 ----- 0.642 mg/kg dry Ix 6050737 05/16/06 09:25 05/25/06 12:09 TestAmerica-Portland,OR 'he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page8of17 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-01 (6486-060510-200) Soil Sampled:05/10/06 08:19 %Solids NCASOP 88,1 ----- 1.00 %by Ix 6050794 05/17/06 08:51 05/17/06 15:34 Weight PPE0584-02 (6486-060510-201) Soil Sampled:05/10/06 08:55 %Solids NCASOP 83,1 ----- 1.00 %by lx 6050794 05/17/0608:51 05/17/0615:34 Weight PPE0584-03 (6486-060510-202) Soil Sampled:05/10/06 09:06 %Solids NCASOP 80,1 ----- 1.00 %by Ix 6050794 05/17/0608:51 05/17/0615:34 Weight PPE0584-05 (6486-060510-207) Soil Sampled:05/10/0610:07 %Solids NCA SOP 82,5 ----- 1.00 %by Ix 6050794 05/17/06 08:51 05/17/06 15:34 Weight PPE0584-06 (6486-060510-208) Soil Sampled:05/10/0610:32 %Solids NCASOP 82,0 ---- 1.00 %by Ix 6050794 05/17/0608:51 05/17/0615:34 Weight PPE0584-07 (6486-060510-209) Soil Sampled:05/10/0610:40 %Solids NCASOP 81.0 ----- 1.00 %by Ix 6050793 05/17/0608:49 05/17/0615:29 Weight PPE0584-08 (6486-060510-210) Soil Sampled:05/10/0610:52 %Solids NCASOP 77,4 ----- 1.00 %by ]x 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-09 (6486-060510-211) Soil Sampled:05/10/0611:03 %Solids NCASOP 80,1 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-10 (6486-060510-215) Soil Sampled:05/10/0612:00 %Solids NCASOP 82,0 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-11 (6486-060510-215b) Soil Sampled:05/10/0612:01 %Solids NCASOP 80,3 ---- 1.00 %by Ix 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-12 (6486-060510-216) Soil Sampled:05/10/0613:42 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page 9of17 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-12 (6486-060510-216) Soil Sampled:05/10/0613:42 %Solids NCA SOP 82,1 ----- 1.00 %by Ix 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-13 (6486-060510-217) Soil Sampled:05/10/0613:47 %Solids NCA SOP 77.0 ----- 1.00 %by Ix 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-14 (6486-060510-218) Soil Sampled:05/10/0613:55 %Solids NCA SOP 75.2 ---- 1.00 %by Ix 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-16 (6486-060510-223) Soil Sampled:05/10/0615:17 %Solids NCA SOP 77.1 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-17 (6486-060510-224) Soil Sampled:05/10/0615:36 %Solids NCA SOP 80,3 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-18 (6486-060510-225) Soil Sampled:05/10/0615:44 %Solids NCA SOP 77.3 ---- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-19 (6486-060510-226) Soil Sampled:05/10/0615:52 %Solids NCA SOP 76,8 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-20 (6486-060510-227) Soil Sampled:05/10/0616:00 %Solids NCA SOP 79.4 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-21 (6486-060510-228) Soil Sampled:05/11/06 08:44 %Solids NCA SOP 83,7 ---- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-22 (6486-060510-229) Soil Sampled:05/11/06 08:48 %Solids NCA SOP 81,7 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-23 (6486-060510-230) Soil Sampled:05/11/06 08:55 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain `t ojcustody document This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager wwwtesta mericainc . com Pagel0of17 TesU�merica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANAtYTICAt TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-23 (6486-060510-230) Soil Sampled:05/11/06 08:55 %Solids NCASOP 81.1 ----- 1.00 %by Ix 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-25 (6486-060510-232) Soil Sampled:05/11/06 09:24 %Solids NCASOP 72.2 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-26 (6486-060510-233) Soil Sampled:05/11/06 09:33 %Solids NCASOP 75,1 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-28 (6486-060510-235) Soil Sampled:05/11/0610:32 %Solids NCASOP 74.9 ----- 1.00 %by lx 6050793 05/17/06 08:49 05/17/06 15:29 Weight PPE0584-29 (6486-060510-236) Soil Sampled:05/11/06 10:43 %Solids NCASOP 70.5 ---- 1.00 %by lx 6050792 05/17/06 08:49 05/18/06 09:24 Weight PPE0584-30 (6486-060510-237) Soil Sampled:05/11/0610:51 %Solids NCA SOP 77,2 ----- 1.00 %by lx 6050792 05/17/06 08:49 05/18/06 09:24 Weight PPE0584-31 (6486-060510-238) Soil Sampled:05/11/0612:44 %Solids NCASOP 82,5 ----- 1.00 °/by lx 6050792 05/17/06 08:49 05/18/06 09:24 Weight PPE0584-32 (6486-060510-238b) Soil Sampled:05/11/0612:45 %Solids NCASOP 80.7 ----- 1.00 %by lx 6050792 05/17/0608:49 05/18/0609:24 Weight PPE0584-33 (6486-060510-239) Soil Sampled:05/11/0612:49 %Solids NCASOP 81,5 --- 1.00 %by Ix 6050792 05/17/06 08:49 05/18/06 09:24 Weight PPE0584-36 (6486-060510-242) Soil Sampled:05/11/0613:15 %Solids NCASOP 82.1 — 1.00 %by ]x 6050792 05/17/0608:49 05/18/0609:24 Weight PPE0584-37 (6486-060510-243) Soil Sampled:05/11/0613:20 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager WW W .testamerlcajflc . com Page 11 of 17 PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 TestAmericaph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Percent Dry Weight (Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-37 (6486-060510-243) Soil Sampled:05/11/0613:20 %Solids NCA SOP 82,3 ----- 1.00 %by Ix 6050792 05/17/06 08:49 05/18/06 09:24 Weight PPE0584-40 (6486-060510-246) Soil Sampled:05/11/0613:56 %Solids NCA SOP 82,6 ----- 1.00 %by lx 6050792 05/17/06 08:49 05/18/06 09:24 Weight PPE0584-41 (6486-060510-247) Soil Sampled:05/11/0613:59 %Solids NCASOP 73.2 ----- 1.00 %by lx 6050792 05/17/0608:49 05/18/0609:24 Weight PPE0584-44 (6486-060510-250) Soil Sampled:05/11/0614:18 %Solids NCA SOP 77.3 — 1.00 %by Ix 6050792 05/17/06 08:49 05/18/06 09:24 Weight PPE058445 (6486-060510-251) Soil Sampled:05/11/0614:23 %Solids NCA SOP 77.7 — 1.00 %by lx 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-47 (6486-060510-253) Soil Sampled:05/11/0614:40 %Solids NCA SOP 84.5 — 1.00 %by Ix 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-48 (6486-060510-253b) Soil Sampled:05/11/0614:41 %Solids NCA SOP 83.4 — 1.00 %by Ix 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-49 (6486-060510-254) Soil Sampled:05/11/0614:47 %Solids NCA SOP 74.2 ----- 1.00 %by Ix 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-51 (6486-060510-256) Soil Sampled:05/12/06 09:42 %Solids NCA SOP 83.3 -- 1.00 %by lx 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-52 (6486-060510-257) Soil Sampled:05/12/06 09:47 %Solids NCA SOP 76.0 — 1.00 %by lx 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-54 (6486-060510-259) Soil Sampled:05/12/0610:03 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must he reproduced in its entirety. Roxanne L.Clifton,Project Manager MILT- www .testa me rica inc . co m Page 12 of 17 (:'�"'"` ► '�'1Cc PORTLAND,OR 9405 S.W.NIMBUS AVENUE ,\".�J■V, �V` BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION Ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-54 (6486-060510-259) Soil Sampled:05/12/0610:03 %Solids NCA SOP 74.4 ----- 1.00 %by Ix 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-55 (6486-060510-260) Soil Sampled:05/12/0610:07 %Solids NCA SOP 71,2 ----- 1.00 %by lx 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-57 (6486-060510-262) Soil Sampled:05/12/06 10:32 %Solids NCA SOP 85,2 ----- 1.00 %by Ix 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-58 (6486-060510-263) Soil Sampled:05/12/0610:37 %Solids NCA SOP 75.5 ----- 1.00 %by ]x 6050791 05/17/06 08:48 05/18/06 09:28 Weight PPE0584-60 (6486-060510-265) Soil Sampled:05/12/0610:55 %`Solids NCASOP 84,8 ----- 1.00 %by Ix 6050791 05/17/0608:48 05/18/0609:28 Weight PPE0584-61 (6486-060510-266) Soil Sampled:05/12/0611:00 %Solids NCA SOP 77,1 ---- 1.00 %by lx 6050791 05/17/06 08:48 05/18/06 09:28 Weight TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager W W W .teSta merjcajflc . com Page 13 of 17 PORTLAND,OR TestAmerica 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6050694 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6050694-BLKI) Extracted: 05/15/0611:46 Arsenic EPA 6020 ND --- 0.495 mg/kg wet Ix 05/24/06 17:15 LCS (6050694-BSI) Extracted: 05/15/0611:46 Arsenic EPA 6020 10.9 --- 0.485 mg/kg wet lx 9.71 112% (80-120) -- -- 05/24/06 17:22 Duplicate (6050694-DUPI) QC Source: PPE0584-01 Extracted: 05/15/06 11:46 Arsenic EPA 6020 3.76 --- 0.551 mg/kg dry ix 4.93 26.9%(40) 05/24/06 17:37 Matrix Spike (6050694-MS1) QC Source: PPE0584-01 Extracted: 05/15/06 11:46 Arsenic EPA 6020 16.2 --- 0.551 mg/kg dry lx 4.93 11.0 102% (75-125) -- -- 05/24/06 17:52 Matrix Spike (6050694-MS2) QC Source: PPE0584-12 Extracted: 05/15/06 11:46 Arsenic EPA 6020 17.3 --- 0.603 mg/kg dry lx 5.16 12.1 100% (75-125) -- -- 05/24/06 19:29 QC Batch: 6050695 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike o (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6050695-BLKI) Extracted: 05/15/0611:49 Arsenic EPA 6020 ND --- 0.476 mg/kg wet lx 05/24/06 20:59 LCS (6050695-BSI) Extracted: 05/15/0611:49 Arsenic EPA 6020 10.6 --- 0.510 mg/kg wet lx 10.2 104% (80-120) -- -- 05/24/06 21:06 Duplicate (6050695-DUPI) QC Source: PPE0584-23 Extracted: 05/15/0611:49 Arsenic EPA 6020 10.2 -- 0.623 mg/kg dry lx 9.90 -- -- -- 2.99%(40) 05/24/06 21:36 Matrix Spike (6050695-MSI) QC Source: PPE0584-23 Extracted: 05/15/06 11:49 Arsenic EPA 6020 24.2 --- 0.629 mg/kg dry Ix 9.90 12.6 113% (75-125) -- -- 05/24/06 21:51 Matrix Spike (6050695-MS2) QC Source: PPE0584-37 Extracted: 05/15/06 11:49 Arsenic EPA 6020 15.5 --- 0.590 mg/kg dry lx 4.80 11.8 90.7% (75-125) -- -- 05/24/06 23:28 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofenstody document.This analytical report most be reproduced in its entirety. Roxanne L.Clifton,Project Manager WwwAesta merica inc com Page 14 of 17 11 't"` � � PORTLAND,OR 9405 S.W.NIMBUS AVENUE ■V, BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6050737 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6050737-BLKI) Extracted: 05/16/0609:25 Arsenic EPA 6020 ND --- 0.481 mg/kg wet Ix -- -- -- -- -- -- 05/25/06 00:58 LCS (6050737-BSI) Extracted: 05/16/0609:25 Arsenic EPA 6020 10.3 --- 0.500 mg/kg wet lx 10.0 103% (80-120) -- -- 05/25/06 01:06 Duplicate (6050737-DUP1) QC Source: PPE0584-54 Extracted: 05/16/0609:25 Arsenic EPA 6020 19.2 --- 0.665 mg/kg dry Ix 13.8 -- -- -- 32.7%(40) 05/25/06 01:21 Matrix Spike (6050737-MSI) QC Source: PPE0584-54 Extracted: 05/16/06 09:25 Arsenic EPA 6020 26.4 --- 0.679 mg/kg dry lx 13.8 13.6 92.6% (75-125) -- -- 05/25/06 01:36 TestAmerica-Portland,OR rhe results in this report apply to the.samples analyzed in accordance with the chain ojcustody document-This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page 15 of 17 TestAmericaPORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Percent Dry Weight(Solids)per Standard Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6050791 Other dry Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits)Analyzed Notes Result Amt REC RPD Duplicate (6050791-DUPl) QC Source: PPE0584-45 Extracted: 05/17/06 08:48 %Solids NCA SOP 75.5 --- 1.00%by Weight lx 77.7 2.87%(20) 05/18/06 09:28 QC Batch: 6050792 Other dry Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) a/- (Limits)Analyzed Notes Result Amt REC RPD Duplicate (6050792-DUPl) QC Source: PPE0584-29 Extracted: 05/17/0608:49 %Solids NCA SOP 70.9 --- 1.00%by Weight lx 70.5 0.566%(20) 05/18/06 09:24 QC Batch: 6050793 Other dry Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil Source Spike °/ (Limits) °/ (Limits)Analyzed Notes Result Amt REC RPD Duplicate (6050793-DUPl) QC Source: PPE0584-07 Extracted: 05/17/0608:49 %Solids NCA SOP 82.4 --- 1.00%by Weight Ix 81.0 1.71%(20) 05/17/06 15:29 QC Batch: 6050794 Other dry Preparation Method: DryWeight Analyte Method Result MDL* MRL Units Dil Source Spike % (Limits) °/ (Limits)Analyzed Notes Result Amt REC RPD Duplicate (6050794-DUPI) QC Source: PPE0552-01 Extracted: 05/17/0608:51 %Solids NCASOP 77.6 -- 1.00%by Weight Ix 77.4 0.258%(20) 05/17/06 15:34 Duplicate (6050794-DUP2) QC Source: PPE0580-01 Extracted: 05/17/06 08:51 %Solids NCA SOP 76.3 --- 1.00%by Weight lx 83.6 -- -- -- 9.13%(20) 05/17/06 15:34 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testamericainc . com Page l6 of 17 TestAmerica PORTLAND,OR BEA S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 05/26/06 17:16 Notes and Definitions Report Specific Notes: None Laboratory Reporting Conventions: DET - Analyte DETECTED at or above the Reporting Limit. Qualitative Analyses only. ND - Analyte NOT DETECTED at or above the reporting limit(MDL or MRL,as appropriate). NR/NA - Not Reported/Not Available dry - Sample results reported on a Dry Weight Basis. Results and Reporting Limits have been corrected for Percent Dry Weight. wet Sample results and reporting limits reported on a Wet Weight Basis(as received). Results with neither'wet'nor'dry'are reported on a Wet Weight Basis. RPD - RELATIVE PERCENT DIFFERENCE (RPDs calculated using Results,not Percent Recoveries). MRL - METHOD REPORTING LIMIT. Reporting Level at,or above,the lowest level standard of the Calibration Table. MDL* - METHOD DETECTION LIMIT. Reporting Level at,or above,the statistically derived limit based on 40CFR,Part 136,Appendix B. *MDLs are listed on the report only if the data has been evaluated below the MRL. Results between the MDL and MRL are reported as Estimated Results. Dil - Dilutions are calculated based on deviations from the standard dilution performed for an analysis,and may not represent the dilution found on the analytical raw data. Reporting- Reporting limits(MDLs and MRLs)are adjusted based on variations in sample preparation amounts,analytical dilutions and Limits percent solids,where applicable. Electronic - Electronic Signature added in accordance with TestAmerica's Electronic Reporting and Electronic Signatures Policy. Signature Application of electronic signature indicates that the report has been reviewed and approved for release by the laboratory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature. TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager w w w .testa me r i c a i n C co m Page 17 of 17 ('\ (' �fr PORTLAND,OR 9405 S.W.NIMBUS AVENUE „�7Y�) ■■j�,..��Jl ■■llJl;; ph:(S0 )90 .9 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION June 30, 2006 Keary Knickerbocker Hahn and Associates, Inc. 434 NW Sixth Ave., Suite 203 Portland, OR 97209 RE: TIGDEQ Enclosed are the results of analyses for samples received by the laboratory on 05/12/06 14:35. The following list is a summary of the Work Orders contained in this report, generated on 06/30/06 18:31. If you have any questions concerning this report, please feel free to contact me. - Work Order Project ProjectNumber PPE0584 TIGDEQ 6486 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ojcustody document.This analytical report must he reproduced in its entirety. Roxanne L.Clifton,Project Manager www .testa me r i c a i n c. c o m Page 1 of 7 TestAmericaPORTLAND,OR 9405S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANAlYTIGAt TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:31 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received 6486-060510-203 PPE0584-04 Soil 05/10/06 09:19 05/12/06 14:35 6486-060510-219 PPE0584-15 Soil 05/10/0614:08 05/12/0614:35 6486-060510-231 PPE0584-24 Soil 05/11/06 09:00 05/12/06 14:35 6486-060510-234 PPE0584-27 Soil 05/11/06 09:39 05/12/06 14:35 6486-060510-248 PPE0584-42 Soil 05/11/0614:03 05/12/0614:35 6486-060510-252 PPE0584-46 Soil 05/11/0614:28 05/12/0614:35 6486-060510-258 PPE0584-53 Soil 05/12/06 09:52 05/12/06 14:35 6486-060510-261 PPE0584-56 Soil 05/12/0610:16 05/12/0614:35 6486-060510-264 PPE0584-59 Soil 05/12/0610:43 05/12/0614:35 6486-060510-267 PPE0584-62 Soil 05/12/0611:04 05/12/0614:35 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager w w .te s t a m e r i c a in c. co m Page2of7 PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 TestAmericaph:(503)906.9200 fax:(503)906.9210 ANALYTICAt TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:31 Total Metals per EPA 6000/7000 Series Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-04 (6486-060510-203) Soil Sampled:05/10/06 09:19 Arsenic EPA 6020 4.96 ----- 0.623 mg/kg dry lx 6060815 06/19/06 16:40 06/27/06 22:36 PPE0584-15 (6486-060510-219) Soil Sampled:05/10/0614:08 Arsenic EPA 6020 12,1 ----- 0.669 mg/kg dry Ix 6060815 06/19/06 16:40 06/27/06 23:44 PPE0584-24 (6486-060510-231) Soil Sampled:05/11/06 09:00 Arsenic EPA 6020 5.55 ----- 0.640 mg/kg dry lx 6060815 06/19/06 16:40 06/27/06 23:51 PPE0584-27 (6486-060510-234) Soil Sampled:05/11/06 09:39 Arsenic EPA 6020 5,61 ----- 0.659 mg/kg dry lx 6060815 06/19/06 16:40 06/27/06 23:59 PPE0584-42 (6486-060510-248) Soil Sampled:05/11/0614:03 Arsenic EPA 6020 40,7 ----- 0.659 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 00:06 PPE058446 (6486-060510-252) Soil Sampled:05/11/0614:28 Arsenic EPA 6020 7,26 ----- 0.668 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 00:14 PPE0584-53 (6486-060510-258) Soil Sampled:05/12/06 09:52 Arsenic EPA 6020 7,26 ---- 0.669 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 00:21 PPE0584-56 (6486-060510-261) Soil Sampled:05/12/0610:16 Arsenic EPA 6020 5.42 ----- 0.599 mg/kg dry Ix 6060815 06/19/06 16:40 06/28/06 00:51 PPE0584-59 (6486-060510-264) Soil Sampled:05/12/0610:43 Arsenic EPA 6020 7,99 ---- 0.640 mg/kg dry Ix 6060815 06/19/06 16:40 06/28/06 00:58 PPE0584-62 (6486-060510-267) Soil Sampled:05/12/0611:04 Arsenic EPA 6020 7,01 ----- 0.652 mg/kg dry lx 6060815 06/19/06 16:40 06/28/06 01:06 TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager www .te s t a m e rica in c. co m Page 3of7 � /" "}' � PORTLAND,OR 9405 S.W.NIMBUS AVENUE �r.Jl BEAVERTON,OR 97008-7132 ANALYTICAL TESTING CORPORATION ph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:31 Percent Dry Weight(Solids) per Standard Methods TestAmerica-Portland,OR Analyte Method Result MDL* MRL Units Dil Batch Prepared Analyzed Notes PPE0584-04 (6486-060510-203) Soil Sampled:05/10/06 09:19 %Solids NCASOP 83.6 ----- 1.00 %by lx 6060472 06/12/06 11:07 06/13/06 10:04 HT-1 Weight PPE0584-15 (6486-060510-219) Soil Sampled:05/10/0614:08 %Solids NCASOP 77,8 ----- 1.00 %by lx 6060472 06/12/0611:07 06/13/0610:04 HT-1 Weight PPE0584-24 (6486-060510-231) Soil Sampled:05/11/06 09:00 %Solids NCASOP 80,6 ----- 1.00 %by lx 6060472 06/12/0611:07 06/13/0610:04 HT-1 Weight PPE0584-27 (6486-060510-234) Soil Sampled:05/11/06 09:39 %Solids NCASOP 76.6 ----- 1.00 %by lx 6060472 06/12/0611:07 06/13/0610:04 HT-1 Weight PPE0584-42 (6486-060510-248) Soil Sampled:05/11/0614:03 %Solids NCASOP 74.4 ----- 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 HT-1 Weight PPE0584-46 (6486-060510-252) Soil Sampled:05/11/0614:28 %Solids NCASOP 73.4 ----- 1.00 %by lx 6060472 06/12/0611:07 06/13/0610:04 HT-1 Weight PPE0584-53 (6486-060510-258) Soil Sampled:05/12/06 09:52 %Solids NCASOP 76,3 ---- 1.00 %by Ix 6060472 06/12/0611:07 06/13/0610:04 HT-1 Weight PPE0584-56 (6486-060510-261) Soil Sampled:05/12/0610:16 %Solids NCASOP 79.5 ----- 1.00 %by lx 6060472 06/12/06 11:07 06/13/06 10:04 HT-1 Weight PPE0584-59 (6486-060510-264) Soil Sampled:05/12/0610:43 %Solids NCASOP 75,9 ----- 1.00 %by Ix 6060472 06/12/06 11:07 06/13/06 10:04 HT-I Weight PPE0584-62 (6486-060510-267) Soil Sampled:05/12/0611:04 %Solids NCASOP 79,9 ----- 1.00 %by Ix 6060472 06/12/0611:07 06/13/0610:04 HT-1 Weight TestAmerica-Portland,OR he results in this report apply to the samples analyzed in accordance with the chain ot'custody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager w w w .t e s t a m e r i c a i n c. c o m Page 4 of7 TestAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 ANALYTICAL TESTING CORPORATION Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:31 Total Metals per EPA 6000/7000 Series Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6060815 Soil Preparation Method: EPA 3050 Analyte Method Result MDL* MRL Units Dil Source Spike */ (Limits) °/ (Limits) Analyzed Notes Result Amt REC RPD Blank (6060815-BLKI) Extracted: 06/19/0616:40 Arsenic EPA 6020 ND --- 0.526 mg/kg wet Ix 06/27/06 22:21 LCS (6060815-BSI) Extracted: 06/19/0616:40 Arsenic EPA 6020 11.9 --- 0.526 mg/kg wet lx 10.5 113% (80-120) -- -- 06/27/06 22:29 Duplicate (6060815-DUPI) QC Source: PPE0584-04 Extracted: 06/19/06 16:40 Arsenic EPA 6020 4.65 --- 0.610 mg/kg dry Ix 4.96 6.45%(40) 06/27/06 22:44 Matrix Spike (6060815-MSI) QC Source: PPE0584-04 Extracted: 06/19/06 16:40 Arsenic EPA 6020 15.2 0.581 mg/kg dry Ix 4.96 11.6 88.3% (75-125) -- -- 06/27/06 23:21 Matrix Spike (6060815-MS2) QC Source: PPE0751-07 Extracted: 06/19/06 16:40 Arsenic EPA 6020 19.6 — 0.673 mg/kg dry ]x 6.89 13.5 94.1% (75-125) -- -- 06/28/06 01:21 TestAmerica-Portland,OR the results in this report apply to the samples analyzed in accordance with the chain ofcustody document.This analytical report must be reproduced in its entirety. Roxanne L.Clifton,Project Manager w w w .t e s t a m e r i c a i n c. c o m Page 5 of 7 mTestArica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ANALYTICAL TF5T9NG CORPORATIONph:(503)906.9200 fax:(503)906.9210 Hahn and Associates,Inc. Project Name: TIGDEQ 434 NW Sixth Ave.,Suite 203 Project Number: 6486 Report Created: Portland,OR 97209 Project Manager: Keary Knickerbocker 06/30/06 18:31 Percent Dry Weight(Solids)per Standard Methods - Laboratory Quality Control Results TestAmerica-Portland,OR QC Batch: 6060472 Soil Preparation Method: Dry Weight Analyte Method Result MDL* MRL Units Dil SourceSpike o (Limits) °I (Limits) Analyzed Notes Result Amt REC RPD Duplicate (6060472-DUPI) QC Source: PPE0584-04 Extracted: 06/12/06 11:07 %Solids NCASOP 83.9 --- 1.00%by Weight lx 83.6 0.358%(20) 06/13/06 10:04 TestAmerica-Portland,OR rhe results in this report apply to the samples analyzed in accordance with the chain ojcustodv document.7his analytical report must be reproduced in its entirety. 1. Roxanne L.Clifton,Project Manager www .testa me r i c a in c. c o m Page 6 of 7