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Report Main Office Branch Office PO Box 23814 4060 Hudson Ave. Inc. igard, OR 97281 Salem, OR 97301 Carlson Testing, nc. Phone (503)684 -3460 Phone (503)589 -1252 Fax # (503)684-0954 Fax # (503)589-1309 August 19, 1998 AA S�_�0 �� #97-G1353 7 Beacon Homes 9500 SW 125th Ave. p "� S 1 " Beav Beaverton, OR 97005 �i. F 4 INAL SOILS LETTER DAKOTA MEADOWS - BUILDING PADS 1-4 and 18 -25 CITY OF TIGARD, OREGON This letter confirms that as of August 11th, 1998, density testing on the granular engineered fill was adequately completed. Based on our observations and testing, the fill location was properly prepared and the fill achieved at least 90 percent of the modified Proctor maximum dry density. The above listed pads are suitable for foundation and slab support. Information contained herein is not to be reproduced, except in full, without prior authorization from this office. If there are any further questions regarding this matter, please do not hesitate to contact this office. Respectfully submitted, 1 lA 3/ �� -- Afato CARLSON TESTING, INC. a` J jA; _ c��� NE 3 - < / // .�/(/ ` � �/ ti, Q 14743 r � , 4 f // ! ,,' OREGON P� v v4N 23. 199 l -- i 1 id6() 664 2� ( U p ' , , ' Pi— James D. Imbrie, P.E. �D _ ll Geotechnical Engineer a 1 /1 3y-0 s 't) e cc: City of Tigard a s - l 3 � / a - f/ 3 70 �,r) ■ / / - 2\ Lf- //3l0 . d&L-- ,_---, ___> a 5- r/--t-3-1-0---76'"jlk-61e--'`-- Mal `!h.. Branch Office PO Bb x 3814 4060 Hudson Ave. Tigard, OR 97281 Salem, OR 97301 Carlson 'Testing Inc. Phone (503)684 -3460 Phone (503)589 -1252 Fax # (503)684-0954 Fax # (503)589-1309 August 19, 1998 15 0 , ' � # 97 -G 13 5 3 I �� , / / 1 ,,� / v L� Beacon Homes 9500 SW 125th Ave. Beaverton, OR 97005 FINAL SOILS LETTER DAKOTA MEADOWS - BUILDING PADS 1-4 and 18 -25 CITY OF TIGARD, OREGON This letter confirms that as of August 11th, 1998, density testing on the granular engineered fill was adequately completed. Based on our observations and testing, the fill location was properly prepared and the fill achieved at least 90 percent of the modified Proctor maximum dry density. The above listed pads are suitable for foundation and slab support. Information contained herein is not to be reproduced, except in full, without prior authorization from this office. If there are any further questions regarding this matter, please do not hesitate to contact this office. Respectfully submitted, I' CARLSON TESTING, INC. i 04 #* ad.d��e 10 PROP - --..1 1 Gtx .', I'i ha s � co E t1GlNf£R I (Z io y _ 2( � ,,i�t'_._ n.ated �,.� 14743 � ( 2( 6(A. '. ei Fi ( l. td ro % . - L"� a _ `l _ — z `r�e co F; Mtbet OREGON �� H23 1g 4 �' ' ES D. 1Me� L 7 • 1 c �r 7 I °I I l ( (;1,44 Fi .1 i./ -% I l 32 ( g u (O fi Vtit • G James D. Imbrie, P.E. Z ' Geotechnical Engineer i b . `'` z2 i t 3S0 6 R_ -' L. vp ,i cc: City of Tigard 2_ 11310 biA4etto j\ :-4 ) : ,, 0 . zit i t 3 K Quito 09/29/99 WED 07:43 FAX 503 670 9147 CARLSON TESTING 02003 Main ' ''ice Branch Office PO Bc,_,3814 4060 Hudson Ave. ' + Tigard, OR 97281 Salem, OR 97301 Carlson Tests Inc. Phone (503)684-3460 Phone (503)589-1252 9 Fax # (503)684-0954 Fax # (503)589 -1309 July 28, 1998 CTI #97 -G1353 Beacon Homes 9500 SW 125th Avenue Beaverton, Oregon 97005 FINAL REPORT OF EARTHWORK OBSERVATION AND TESTING DAKOTA MEADOWS SUBDIVISION TIGARD, OREGON Carlson Testing Inc. (CTI ), has conducted on -call inspection services for the earthwork at the above residential development located off SW North Dakota & SW 105th PI in Tigard, Oregon. This final letter briefly summarizes our observations and testing during construction, and the as -built soil conditions to the best of our knowledge. Foundation design input has already been addressed in previous reports provided by CTI. In addition, CTI has reviewed and stamped the approved plans to verify that the previous recommendations were incorporated into the design of the foundations. SITE PREPARATION AND FILL PLACEMENT Based on our visual observations and our density test results, after stripping vegetation and topsoil, engineered fill using on -site soil was moisture- conditioned and placed on the following areas to a maximum depth of approximately 3 feet. LOTS: 5 - 17 and 23 - 25 Based on the in -place soil density results and our visual observations, it is our opinion that the engineered fill on the above lots was generally placed in conformance with the City of Tigard standards. On the attached test summary, lot tests LF -1 through LF -20 were density tests taken during both a morning and afternoon visit by CTI on 1 -9 -98. These test were slightly lower than the minimum compaction requirement. CTI conducted a follow up visit on 2 -3 -98 and retested the failing areas. All retests exceed the minimum compaction requirement. The retests are listed as structural fill tests SF -1 through SF -6. The engineered fill is considered suitable for support of spread footings. The remaining lots within the subdivision were either cut lots or lots left near original grade. 5 l 12.0o b(.tt,(4 ✓ �3 i 13'70 6iit- -- (P •I 1210 gu- eu o ,/ l 1 220 614- to ./. 1 1 3 gO Ov - 1123a &kr-4 o 1 - (IzNo gu 4.10 " S 13'U C `C g' 1 1 250 60 (0 ,/ Xi) ( 5%' i lI _ 1.12(2a 61,(4400 ;/ I Z 1(270 6i,&4 13 lc21so is ,tia to H l (2 eal ,Yt.- . Gv j 5 it 0 61 1.7 , 1I33o 6 6t. 0 — 09/29/99 WED 07:44 FAX 503 670 9147 CARLSON TESTING []004 CTI #98 -G1353 Dakota Meadows Page 2 CLOSING AND LIMITATIONS Our reports pertain to the materials tested /inspected only. This letter should not be construed to relieve or lessen the responsibility of the contractor or owner's site representative for this site work, but is provided for the minimum required governmental assurance. Our support was given on an as- needed basis as requested. If conditions are encountered during foundation excavation which differ from this report, then the developer (Beacon Homes), the contractor (GVS), and CTI should be allowed to review the condition before corrective actions are taken. Corrective work performed by the builder without notifying the above parties will be interpreted as an acceptance of the conditions encountered. Respectfully submitted, �KEO PROFL CARLSON TESTING, INC. � �`3� �t1G1NEER /04. ce 14743 I l7 / , .. OREGON v 23. A9 �� �C. 'bES D. WO E y. C.6--77 Brian D. Leach, E.I. James D. Imbrie, P.E. Engineering Associate Principal Engineer Attachments: Summary report of in -place soil density tests 09/29/99 WED 07:44 FAX 503 670 9147 CARLSON TESTING Z005 CTI #98-G1353 • Dakota Meadows Page 3 APPENDIX A IN -PLACE DENSITY TESTING A minimum of 90 percent of the maximum dry density obtained from the Modified Proctor (AASHTO T -180) was required for engineered fill placed in the lots of this development. The field density testing was performed in general conformance with ASTM D2922 and D3017, utilizing a nuclear density gauge. A complete density test result summary is attached. Prefix designations on the test nos. indicate the type of fill being tested as follows: NC- No Code (general fill areas and backfill) LF- residential Lot engineered Fill RF- Roadway engineered Fill PS- Pavement Subgrade BC- Base Course RW- Retaining Wall backfill WT- Water line Trench ST- sanitary Sewer Trench DT- Storm Drain Trench Any suffix designation's (A, B, C, etc.) indicate results of retests which immediately follow the original failed test. 09/29/99 WED 07:44 FAX 503 670 9147 CARLSON TESTING a006 • • Inc. Construction Inspection & Related Tests Carls ®n Testier, SUMMARY REPORT OF P.O. Box 23814 IN-PLACE DENSITY TESTS Tigard, Oregon 97281 97-G1353 Phone (503) 684 -3460 JOB NO. FAX (503) 684 -0954 Jul 165 1998 Client BEACON HOMES Project DAKOTA MEADOWS SW NORTH DPINu i A .4 :zw 1V * ti rt_ - t 1caWhu DATE OF TEST ELEWDEPTIT LAB MAX % ADJ. HELD FIELD DRY REVIVE TEST NO TEST LOCATION FI DRy �"y s MOISTURE �y COMPACTION BC STATION 3 +50 SW N DAKOTA TOP 1 18' RIGHT OF CENTERLINE 3- 6 144.6 7.7 137.5 95 BC STATION 4 +25 SW N DAKOTA TOP 2 12' RIGHT CC7 CENTERLINE 3- 6 144.6 5.2 137.8 95 BC STATION 4 +75 SW N DAKOTA TOP 3 16' RIGHT OF CENTERLINE 3- 6 144.6 6.8 1:7.5 ?5j LF LOT 55 CENTER +2.0 1 1- 9 144.6 5.5 124.3 26 LF LOT 6s CENTER +2.0 1- 9 144,6 5.5 125.4 871 LF LOT 75 CENTER +2.0 1- 9, 144.6 6.1 _126.4 87 LF LOT 85 CENTER +2.0 4 1- 9 144.6 5.6_123.5 85 LF LOT 9% CENTER +2.0 5 1- 9 144.6 6.4 121.4 84 LF LOT 10, CENTER +2.0 6 1- 9 144.6 6.1 121.9 84 LF LOT 115 CENTER +2.0 7 1- 9 144.6 6.6 125.9 87 LF LOT 125 CENTER +2.0 B 1- 9 144.6 6.4 126.3 87 LF LOT 13s CENTER +2.0 1- 9 I 144.E 6.3 127.1 Sd cc: CITY OF TIGARD ALPHA ENGINEERING INC CARLSON TESTING INC. Information contained herein is not to be reproduced, except in full, without prior authorization from this office. 09/29/99 WED 07:45 FAX 503 670 9147 CARLSON TESTING I] 007 • C arlson Te s ti , Inc. Construction Inspection (5, Related Test SUMMARY REPORT OF IN -PLACE DENSITY TESTS P.O 14 Tigard, Oregon 97281 JOB NO. 97-G1353 Phone (503) 684-3460 FAX (503) 6840954 Jul 167 1998 Client _ BEACON HOMES Project DAKOTA MEADOWS SW NORTH DAKOTA SW 105TH PL - TIGARD - DATE OF TEST LemoEvrm LAB MAX 9L ADJ. FIELD RE].DDRY RELAYS TEST NO TEST LOCATION ( DRY DENSITY COARSE Eva WIETURE DENSnY c mPUnDN _ (Lb 1 k PARTICLES DENS ow (m / fr rxo LF LOT 5s FRONT CENTER -2.0 " 10 1- 9 144.6 6.1 127.5 8E LF LOT 6s FRONT CENTER -2.0 11 1- 9 LF LOT 7, FRONT CENTER - 2 .0 144 124.2 86 12 1- 9 LF LOT 8, 2.0 FRONT CENTER .- 144.6 5.9 122.7 85 13 I- 9 LF LOT 9, FRONT CENTER 144. 6.4 125.3 - 7 14 -2.0 1- 9 LF LOT 10, FRONT CENTER 144.6 5 . 9 125.05 86 15 -2.0 1- 9 LF LOT 111 FRONT CENTER 144.6 6.3 124. ; 86 16 -2 1- 9 144.6 6.0 125.3 87 LF LOT 12, FRONT CENTER -2.0 17 1- 9 LF LOT 151 BACK CENTER 144 5 • 9 124.7 2 18 -2.0 1- 9 7.0 126.1 87 LF LOT 164 BACK CENTER 19 -<'_'.0 1- 9 LF LOT 17, BACK CENTER 144.6 6.8 125.9 ``7 20 -2.4 1- 9 LF CENTER OF LOT 17 144.6 6. 125.3_ Z 21 144.E �.O 143 g5 cc: CITY OF TIGARD ALPHA ENGINEERING INC CARLSON TESTING INC. Information contained herein is not to be reproduced, except in full, with nrinr asohnriTorirn 09/29/99 WED 07:45 FAX 503 670 9147 CARLSON TESTING 1 008 Construction Inspection & Related Tests Carlson Testing, Inc. SUMMARY REPORT OF P.O. Box 23814 IN -PLACE DENSITY TESTS Tigard, Oregon 97281 Phone (503) 684 -3460 JOB NO. 97—G1353 FAX (503) 684 -0954 Jul 1 1998 Client BEACON HOMES Project DAKOTA MEADOWS SW NUK1H DAKUTA :y SW 10bIH }-'L - DATE OF TEST ELEv/oEpTH UA9 MAX % ADJ. Rao FIELD DRY ABLATIVE TEST LOCATION Ft} DRY D COARSE MAX MOVE DEnsrn COMPACTION TEST NO lrorrr;) PatT1O1& ofr+G 1%) po/Tr) c %) LF CENTER OF LOT 23 2 144.6 7.5 137.8 95 LF CENTER OF LOT 24 2 .1 - 144.6 7.9 140.4 97 LF CENTER OF LOT 25 24 3 144.6 8.8 143.3 99 SF FILL BETWEEN LOTS 5/6 1 3 144.6 8.1 142.5 99 SF FILL BETWEEN LOTS 7/S 2- 3 144.6 7.7 12.8.8 96 SF FILL BETWEEN LOTS 9/10 3 J 2 3 144.6 7.9 98 SF FILL BETWEEN LOTS 11/12 4 2 3 144.6 6.9 137.7 SF FILL BETWEEN LOTS 13/14 5 2 3 144.6 7.3 137.4 9E SF FILL BETWEEN LOTS 15/16 6 t — 144.6 8.2 1 :39.8, 97 ST STATION 2 +00 LINE "B" -1.0 1 SANITARY SEWER TRENCH 12 S 144.6 12.4122.0 84 ST STATION 1 +00 LINE "B" 2 SANITARY SEWER TRENCH 12- S 144.6 9.2 SZ ST STATION 3 +00 LINE "A" -1.0 SANITARY SEWER TRENCH' 22- E. 144.6 9.6 123.0 r-,' cc: CITY OF TIGARD ALPHA ENGINEERING INC • CARLSON TESTING INC. Information contained herein is not to be reproduced, except in full, without prior authorization from this office. 09/29/99 WED 07:45 FAX 503 670 9147 CARLSON TESTING I]009 Construct[ort Inspection Related Tests Carison T Inc. SUMMARY REPORT OF P.O. Box 23814 IN -PLACE DENSITY TESTS Tigard, Oregon 97281 97 -61353 Phone (503) 684-3460 JOB NO. FAX (503) 684 -0954 Ju 163 1998 Client BEACON HOMES _ - Project .__ DAKOTA MEADOWS SW NORTH DAKOTA & SW 105TH PL - TIGARD DATE OF TEST ELEVroEPrH tA8 MAX % Aal. REw HID oar REIATWE TEST NO TEST LOCATION iFT3 o rr DE MAX Mo DEN coMP ST LOT 19 LATERAL LINE "A" -1.0 4 SANITARY SEWER TRENCH 12- 8 144.6 8.5 118.5 S2 ST LOT 1 LATERAL LINE "A" -1.0 5 SANITARY SEWER TRENCH 12- 8 • 144.6 13.9119.5 83 - ST STATION 2 +00 LINE "A" -3.0 6 SANITARY SEWER TRENCH 12- Ec 144.6 15.2120.3 83 ST STATION 1 +75 LINE "A" -1.0 7 SANITARY SEWER TRENCH 12- 5 144.6 12.9117.4 81 ST LOT 9 LATERAL LINE "A" -1.0 8 SANITARY SEWER TRENCH 12- 3 144.6 11.5121.5 :34 ST STATION 1 +25 LINE "A" -4.0 9 SANITARY SEWER TRENCH 12- 8 144.6 14.61 23.6 86 ST LATERAL LOT 3 LINE "A" -1.0 10 SANITARY SEWER TRENCH 12- 8 144.6 12.41 20.3 82 ST STATION 0 +10 ON NORTH DAKOTA -1.0 11 SANITARY SEWER TRENCH 12- 8 _ 144.6 14.0125.4 87 ST LOT 6 LATERAL ON NORTH DAKOTA -1.0 12 SANITARY SEWER TRENCH 12 5 144.6 12. 32 cc: CITY OF TIGARD ALPHA ENGINEERING INC CARLSON TESTING INC. Information contained herein is not to be reproduced, except in full, without prior authorization from this office.