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01.12.2009 - GeoEngineers GEOENGINEER� January 12,2009 Oregon Department of Environmental Quality 2020 SW Fourth Avenue, Suite 400 Portland,Oregon 97204-1912 Attention: Loren Garner Subject: Supplemental Sediment Sampling Tigard Library,Tigard,Oregon File No. 4025-003-02 INTRODUCTION GeoEngineers prepared this letter on behalf of the City of Tigard (City) to present information to the Oregon Department of Environmental Quality (DEQ) regarding sediment sampling activities completed by GeoEngineers at the Tigard Library property, located at 13125 SW Hall Boulevard in Tigard, Oregon (site). The DEQ Environmental Cleanup Site Information(ECSI)number for the site is 4063. GeoEngineers sampled sediment to further evaluate the risks that arsenic in sediment may pose to ecological health at the site. The sediment sampling was conducted at the request of DEQ and in accordance with the sampling and analysis protocols discussed by GeoEngineers, the City of Tigard, and DEQ. BACKGROUND GeoEngineers submitted a human health and ecological risk assessment (the "Risk Assessment Report") for arsenic-contaminated soil and sediment at the site to DEQ on July 11,2008. DEQ provided comments regarding the Risk Assessment Report on August 18, 2008. GeoEngineers, representatives of DEQ (Loren Garner and Paul Seidel), and a representative of the City of Tigard (Dennis Koellermeier) met at DEQ's Northwest Region office to discuss DEQ's comments on September 29,2008. During the September 29, 2008 meeting, DEQ requested that GeoEngineers conduct additional sediment sampling at the site to further assess whether the arsenic concentrations in sediment could pose an unacceptable risk to aquatic receptors. Specifically, DEQ requested that GeoEngineers collect three 30-point composite sediment samples from the pond/wetland area of the site and submit the samples for analysis of arsenic using multi-increment analytical methods (Alaska Department of Environmental Conservation, 2007). DEQ indicated that they would consider arsenic concentrations less than the Probable Effect Concentration (McDonald et al., 2000) of 33 milligrams per kilogram (mg/kg) to present no unacceptable risk to aquatic receptors. SEDIMENT SAMPLING GeoEngineers mobilized to the site on October 21, 2008 to collect sediment samples from the grid locations shown in Figure 1. Sample locations were identified in the field using a global positioning system instrument, accurate to less than one horizontal meter. The samples were collected using a stainless steel trowel from the same relative locations within each grid cell, at depths between the surface Earth Science.+Technology 15055 SW Sequoia Pkwy telephone 503.624.9274 Suite 140 facsimile; 503.620.5940 Portland, OR 97224 website www.geoengineers.com Oregon Department of Environmental Quality January 12,2009 Page 2 and approximately six inches below ground surface. The samples were immediately placed in laboratory- supplied sample containers and stored in an iced cooler for delivery to the analytical laboratory. The stainless steel trowel was decontaminated between each sample using a Equinox wash, followed by rinses with tap water and distilled water. The samples (each of equal mass) were mixed at TestAmerica laboratory to create three 30-point composite samples. The composite samples were processed using multi-increment sample preparation methods and subsequently analyzed for total arsenic using U.S. Environmental Protection Agency (EPA) Method 6020. A copy of the laboratory analytical data report is presented in Attachment A. ANALYTICAL DATA Arsenic was detected in the three composite samples (samples "1A-30A", "1B-30B", and "1C-30C") at concentrations of 11.8, 10.5, and 12.9 milligrams per kilogram (mg/kg), respectively. GeoEngineers reviewed the laboratory data report and did not identify any data quality exceptions. CONCLUSIONS The concentrations of arsenic detected in composite samples 1A-30A, 1B-30B, and IC-30C are well below the Probable Effect Concentration (33 mg/kg), indicating that the concentrations of arsenic in sediment at the site do not pose an unacceptable risk to the health of aquatic ecological receptors. The data presented herein, as well as data summarized in the Risk Assessment Report, indicate that the concentrations of arsenic in sediment at the site do not pose a risk to ecological health at the site. The concentrations of arsenic in sediment and soil may pose an unacceptable risk to human health. GeoEngineers is preparing a focused feasibility study to select appropriate remedies for arsenic contamination at the site. REFERENCES Alaska Department of Environmental Conservation,2007. Guidance on Multi-Increment Soil Sampling. GeoEngineers, 2008. Human Health Risk Assessment and Level I and Level II Ecological Risk Assessments,Tigard Library, 13500 SW Hall Boulevard,Tigard,Oregon. McDonald, D.D, Ingersoll, C.G, and Berger, T.A., 2000. Development of Consensus-Based Sediment Quality Guidelines for Freshwater Sediment. Archives of Environmental Contamination and Toxicology, 39: 20-31. File No.4025-003-02 GEOENGINEERS-ig Oregon Department of Environmental Quality January 12,2009 Page 3 If you have any questions or comments regarding the planned activities, please contact the undersigned at 503-624-9274. Sincerely, / �\�•`�.,. GeoEngineers, Inc. % 1/dr:' LWCBa Chris W.Breemer,R.G. {�. `�� .�•c,� Senior Project Manager L n Cad.i� /JohnH.Biggane Principal CWB:JHB:cje Port:\4\4025003\02\Finals\402500302SedimentLetter.doc Attachment: Figure 1. —Sediment Sample Location Map Attachment A—Laboratory Analytical Data Report c: Dennis Koellermeier,City of Tigard Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. CopyrightC 2009 by GeoEngineers,Inc. All rights reserved. File No.4025-003-02 GWENGINEER!L�r d 1 i i I.IIIIMIIIIINIII __; I�i �� I �: T1Tf Oct CD N I I + \" { \ m \ W aKsticga`" \1 aVo _ '.Pine •i I � i' o :. I. C J C 0 Legend N Composite Samples ® Pond/Wetland Area ws 1A- 30A Sampling Grid s U) 70 0 70 N 1B - 30B Cl) Feet 1C - 30C 0 N Notes: Sediment Sample Location Map d. 1.The locations of all features shown are approximate. a 2.This drawing is for information purposes.It is intended to assist in showing features discussed in an attached document.GeoEngineers,Inc. w can not guarantee the accuracy and content of electronic files.The master a file is stored by GeoEngineers,Inc.and will serve as the official record of Tigard Library this communication. Tigard, Oregon 3.It is unlawful to copy or reproduce all or any part thereof,whether for tY personal use or resale,without permission. O Data Sources: Base drawing obtained from Hahn and Associates, a dated 10/2006 G EO E N G I N E E R Figure 1 u Transverse Mercator,Zone 10 N North,North American Datum 1983 `.E North arrow oriented to grid north 0 • �\\ ATTACHMENTA LABORATORY ANALYTICAL DATA REPORT I ' I , I !I J!l /'I �1 T ' stAm n r♦ j PORTLAND,OR 9405 S.W.NIMBUS AVENUE ��►44i4/// 11 �/7 BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 THE LEADER IN ENVIRONMENTAL TESTING ORELAP#:OR100621 November 17,2008 Chris Breemer GeoEngineers,Inc. 15055 SW Sequoia Parkway, Suite 140 Portland,OR 97224 RE: Tigard Library Enclosed are the results of analyses for samples received by the laboratory on 10/24/08 1435. The following list is a summary of the Work Orders contained in this report,generated on 11/17/08 15:26. If you have any questions concerning this report,please feel free to contact me. Work Order Project ProiectNumber PRJO863 Tigard Library 4025-003-02 TestAmerica Portland The results in this report apph to the samples anaf—d in accordance mith the chain of ntsmdv document.This analytical repot9 shall not n pmov l of except r fill. xi(hout the xritten approval ojthe laboratory. Estella Rieben,Project Manager WWW .testa mericainc .com Page Iof6 T tAm eri ��////a PORTLAND,OR 9405 S.W.NIMBUS AVENUE ►rBEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 THE LEADEN IN ENVIRONMENTAL TESTING GeoEngineers,Inc. Project Name: Tigard Library 15055 SW Sequoia Parkway,Suite 140 Project Number: 4025-003-02 Report Created: Portland,OR 97224 Project Manager: Chris Breemer 11/17/08 15:26 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received IA-30A PRJO863-01 Soil 10/21/08 15:00 10/24/08 14:35 IB-30B PR30863-02 Soil 10/21/0815:00 10/24/08 14:35 IC-30C PRJ0863-03 Soil 10/21/08 15:00 10/24/08 14:35 TestAmerica Portland The—Its in this report apply to the samples anal—d in accordance with the chain of custody document.This analvtical report shall not be reproduced except in full, 5k& L er_� ` wa ithmthe written approval of the labwntom Estella Rieben,Proiect Manager J3 w w w .te s t a m e r i c a in c .co m Page 2of6 w TesfAmerica PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97009-7132 ph:(503)906.9200 fax:(503)906.9210 ' THE LEADER IN ENVIRONMENTAL TESTING GeoEngineers,Inc. Project Name: Tigard Library 15055 SW Sequoia Parkway,Suite 140 Project Number: 4025-003-02 Report Created: Portland,OR 97224 Project Manager: Chris Breemer 11/17/0815:26 Analytical Case Narrative TestAmerica-Portland,OR PRJ0863 These samples were first prepared by Multi-Incremental Sampling. Thirty(30)samples were taken and composited via the multi-incremental sampling method into one(1)sample. This was done for all samples submitted. Metals analysis for Arsenic was done on these composited samples. TestAmerica Portland The rendts in this report apply to the samples analyzed in accordance with the chain of custody dontment.This anahiical report shall not prothtced inf.11, rrithmtt the+witten apprroval ofthe llahboratory. Estella Rieben,Project Manager w w w .testa m e rica in c com Page 3of6 i to e 'V a PORTLAND,OR 9405 S.W.NIMBUS AVENUE Alf BEAVERTON,OR 97008-7132 ph:(503),906.9200 fax:(503)906.9210 THE LEADER IN ENVIRONMENTAL TESTING GeoEngineers,Inc. Project Name: Tigard Library 15055 SW Sequoia Parkway,Suite 140 Project Number: 4025-003-02 Report Created: Portland,OR 97224 Project Manager: Chris Breemer 11/17/08 15:26 Total Metals per EPA 6000/7000 Series Methods TestAmerica Portland Analyte Method Result MDL* MRL Units oil Batch Prepared Analyzed Notes PRJ0863-01 (1A-30A) Soil Sampled:10/21/0815:00 Arsenic EPA 6020 11,8 --- 0.500 mg/kg wet Ix 8110299 11/10/0910:30 11/12/08 03:47 PRJ0863-02 (1B-30B) Soil Sampled:10/2110815:00 Arsenic EPA 6020 10,5 --- 0.501 mg/kg wet Ix 8110299 11/10/0810:30 11/12/08 04:16 PRJ0863-03 (1C-30C) Soil Sampled:l0/2110815:00 Arsenic EPA 6020 12,9 ---- 0.497 mg/kg wet Ix 8110299 11/10/0810:30 11/12/0804:23 TestAmenca Portland The—Its in this report apply to the samples analvtcd in accordance%-ith the chain of custody document This analwicol report shall not be reproduced except infill, wilhma the xritten approval of the lahoratary. Estella Rieben,Project Manager w w w .testa m e r ica inc .co m Page 4of6 f W PORTLAND,OR 9405 S.W.NIMBUS AVENUETestAmerica BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 THE LEADER IN ENVIRONMENTAL TESTING GeoEngineers,Inc. Project Name: Tigard Library 15055 SW Sequoia Parkway,Suite 140 Project Number: 4025-003-02 Report Created: Portland,OR 97224 Project Manager: Chris Breemer 11/17/08 15:26 Total Metals per EPA 6000/7000 Series Metbods - Laboratory Quality Control Results TestAmerica Portland QC Batch: 8110299 Soil Preparation Method: EPA 3050 AnalyKe Method Result MDL* MRL Units Dil Source Spike °i (Limits) * Result Amt REC ) RPD (Limits) Analyzed Notes Blank (8110299-BLKI) Extracted: 11/10/0810:30 Arsenic EPA 6020 ND --- 0.500 mg/kgwet lx -- -- — -- — -- 11/12/0803:32 LCS (8110299-BSI) Extracted: 11/10/0810:30 Arsenic EPA 6020 9.77 --- 0.500 mg/kg wet ]x -- 9.99 97.8% (80-120) -- -- 11/12/0803:39 Duplicate (8110299-DUPI) QCSource: PR30863-01 Extracted: 11110/0810:30 Arsenic EPA 6020 11.9 --- 0.491 mg/kg wet Ix 11.8 -- -- -- 0.597% (40) 11/1210803:54 Matrix Spike (8110299-MSI) QC Source: PR30863-01 Extracted: 11/10/0810:30 Arsenic EPA 6020 22.4 --- 0.500 mg/kg wel Ix 11.8 10.0 105% (75-125) -- -- 11/12/0804:09 TestAmerica Portland The results in this report apply to the samples analized in accordance with the chain of ntsrodc dn-ent.This analytical report shall not be reproduced except infill. �`j j)• � ` mithrne the xvitten approval of the loboratorn. Estella Rieben,Project Managerjti`,J•�_-/) wwwAestamericainc .com Page 5of6 ' y w T to eri a PORTLAND,OR 9405 S.W.NIMBUS AVENUE BEAVERTON,OR 97008-7132 ph:(503)906.9200 fax:(503)906.9210 THE LEADER IN ENVIRONMENTAL TESTING GeoEngineers,Inc. Project Name: Tigard Library 15055 SW Sequoia Parkway,Suite 140 Project Number: 4025-003-02 Report Created: Portland,OR 97224 Project Manager: Chris Breemer 11/17/08 15:26 Notes and Definitions Report Snecific 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 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 The recalls in this report apply 10 the samples analyzed in accordance with the chain ojarslodv document This analytical repart shall n 1 he rep-duced except in fall, withwrt the-111e.-111e.n approval ajthe laboratory. Estella Rieben,Project Manager •J) w w w .te sta m e r i c a in c .co m Page 6of6 l CHAIN OF CUSTODY REPORT' NVork Order?i: CLIENT: rNVOICE 10 I 1 URN,�ROUND REOU£ST REPORT TO r 3 ADDRESS /`mac 5..1 r� .. .• �n!.us nr33 Un.�' .... / `' -. 1 ...• - r r. l / �a i.... <e` / -'7 • ) �` Urgwi:f Ino:ga::�c Annipsex 5 � PHONE:,... _ - FAX: P.U.NUMBER: ^rv0irwa!r:,;roc3a�oa:.ua Y,sex PROJECTNAME: '" PR-SERVAT(VE PROJECT NUMBER: I . REQUESTED ANALYSES I `pTHER SAMPLED BY:1, /C o �` lC/ J' . � r.�rl/frquaa trrr rhua xmab.0 v„ry.•.n..Ru.k Cia.yc: CLIENT SA-MPLE SAMPLING I MATRIX -- dpF IDENTIFICATION DATE/TIME �sr•3 I � T I LOCATION' 3 t S 6 t s l Io RELeASED BY: DATE! RECEIVE PRINTNAME: to FIRM: . t '�, TIME: '•. •1 PRMT NAM e: _. FIRM: s (/� ,y/�- /�/,�� TIME;f RELEASED BY; � , •�-- DATE: /Tri /y RECEIVED BY: �� Z•'�/�7t -y.� DnTE: 112 PRINT NAME: I"W. —_-._ ..__ _. ___ ..- _ ___-.. _ .. a� - -__...- .. ..... ._-TIME: . ry ... _ .�-- �/,y.tJ h .. PRMT NAME: F Md.. 1 TIMF, 1 ADDITIONAL REMARKS: 1 f�F�S<' ("�",•t�cc. �% 1i.5 �.2CWrr.- 0 6�Cnr<'� r'N�+, r - //1�r1'r6wrnl 5r,�•�•r TEMr: EOC REV 034006 J. O! Note;By relinquishing samples to TestAmerica,client agrees to pay for the services requested on this chain of custody formand for any additional analyses performed on this project. Payment for services is due within 30 days from the date of invoice unleRR nth—pigL. TestAmerica Sample Receipt Checklist Received by: Unpacked by: Logged-in by: Work Orr No '^V3 '(section A) '(section B) Client-• 'a ; Date 1 t ":_ Date: � y --I �I: Date: l; Project: � -------- Time. Initials. Initials * ` Temperature out of range: r '`47-�. Initials: No enough Ice No ice _Ice Melted ***ESI Clients (see section C1 Digi#1 _wlin a Hours Digi#2 Other:_ Cooler Temperature (IR): -"I 'Cplastic glas�NA (oil/air samples, ESI client)— —Temperature Blank: - - - - - - - - - - -`C - - - - - Sample Status: A 1 Custody Seals: (#_) B (If N circled,see NOD) — Signature: Y N Dated: General: Received from: None Intact7 IYL 1 N 4TA Courier I { #Containers Match COC? Y N none given Container Type: _Senvoy � 1 _ ___J #Cooler(s) _UPS I IDs Match COC? Y N #Box(s) _Fed Ex For Analyses Requested: None(_#Other: ) ,Client I Cyanide Checked? Y N SIA, _TDP I Correct Type&Preservation? N v Coolant Type: Gel Ice DHL Adequate Volume? Y N I Loose Ice SDS Mid-Valley I Within Hold Time? Y N None — Volatiles/Oil Quality: GS/TA I GS/TA VOAsI Syringes free of Headspace? Y N Packing Material: y Bubble Bags _Other: I TB on COC? not provided Y N A Styrofoam Cubbies ' Metals: f Peanuts I HNO3 Preserved? Y N INA None(_Other: ) I Dissolved Metals Filtered? Y N N Clients Only: 1 FED EXI UPS: Was the tracking paper keepable? YES NO Temperature Blank: °C not provided Digi:#1 #2 If circled NO, what is the Tracking number? All preserved bottles checked Y N NA (voaslsoilslall unp.) I FED EX Goldstreak UPS DHL Other: Alt preservia accor Id ugly? - Y 1V(see NOD) NA (voas/soits/all unp.) Project Managers: Comments: PM Reviewed: (Initial/Date) r