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1533298-Rev0-Final Construction Summary Letter-101819.pdf' GOLDER October 18, 2019 Mr. Doug Ikegami Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 Project No. 1533298 DOUG'S LYNNWOOD MAZDA —SHOWROOM EXPANSION SPECIAL INSPECTION LETTER, PROJECT NO. BLD2019-0120 Dear Doug: Golder Associates Inc. (Golder) performed geotechnical construction observation for Doug's Lynnwood Mazda Showroom Expansion for the existing Mazda Dealership located at 22130 Highway 99 in Edmonds, Washington. The work was performed in accordance with the scope of work dated April 14, 2018. Golder provided geotechnical inspection services between September 5, 2018 and June 27, 2019. During our special inspection, Golder observed the following components of construction: ■ Footing subgrade inspection ■ Density testing of backfill materials ■ Laboratory testing of backfill materials Based on our involvement with the project, these components were observed by Golder were completed in general accordance with the approved project specifications and drawings. Observations were recorded in our daily field reports. The daily reports are attached as Attachment 1 and associated laboratory tests are included as Attachment 2. Please contact us should any additional information be required. Golder Associates Inc. 18300 NE Union Hill Road, Suite 200, Redmond, Washington, USA 98052 T: +1 425 883-0777 F: +1 425 882-5498 Golder and the G logo are trademarks of Golder Associates Corporation golder.com Mr. Doug Ikegami Doug's Lynnwood Mazda Sincerely, Golder Associates Inc. Margaret L. Pryor, PE Senior Geotechnical Engineer M P/J GJ/ks Attachments: Attachment 1 — Field Reports Attachment 2 — Laboratory Analyses 1533298-rev0-final construction summary letter-101819 �J James G. Joh Von,EG, LG Principal Project No. 1533298 October 18, 2019 V GOLDER ATTACHMENT Field kuperts Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE:1315 OFFSITE:1345 SITE ACTIVITIES THE FOLLOWING WAS NOTED: DATE: Wednesday, September 5th, 2018 JOB NO: �1533298 PROJECT: Lynnwood Mazda Dealership LOCATION: Lynnwood, WA CONTRACTOR: Wilcox Construction Inc. OWNER: Lynnwood Mazda WEATHER: Sunny w/ sparse clouds TEMP (°F): 70 PRESENT AT SITE: Golder — Christian Norris Wilcox — Shane, and four (4) other workers FOUNDATION COMPACTION TESTING: Golder was requested onsite to assess condition of subgrade soils within a foundation trench in native gravelly sand. A'/z-inch fiberglass T-Probe was used to check the subgrade in the area indicated in Figure 1. The native cut was approximately 11/2 feet below adacent grade and approximately 31/2 feet in width. A majority of the subgrade trench was generally firm and is suitable for foundation support. There were two areas with silt subgrade soils about 3 to 4 feet in length where the t-probe was inserted to a depths ranging from 5 to 14 inches. Shane, Wilcox's site supervisor, was informed that the material in these areas needed to removed and replaced with properly placed structural fill. These areas are shown in Figure 1. Figure 1: (Not to Scale. Approximate measurements.) C y +a -- -----H L-T T 0 E- E -L Li I ;` FE E _ -- FEF•E E m F LEGEND 0 m O Passing (Yields 1/8"-3") 0Failed (Yields 5".8"( J' 0 Removal Req46lay like( a 0 N DOUG'S LYNNWOOD MAZDA 22130HIGHWAY-" _ _ +- crgcm 7?L FOUNDATION DRAIN PLAN . Page 2 of 2 SIGNED: C" /� d(� Christian Norris — Field Technician COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE:1230 OFFSITE:1250 SITE ACTIVITIES THE FOLLOWING WAS NOTED: DATE: Friday, September 28, 2018 JOB NO: �1533298 PROJECT: Lynnwood Mazda Dealership LOCATION: Lynnwood, WA CONTRACTOR: Wilcox Construction Inc. OWNER: Lynnwood Mazda WEATHER: Sunny TEMP (°F): 70 PRESENT AT SITE: Golder — Margie Pryor Wilcox — Shane, and four (4) other workers FOUNDATION COMPACTION TESTING: Golder was requested to assess condition of subgrade areas that were previously checked on 9-5-2018. Areas of soft/loose subgrade soils were identified during the 9-5-18 site visit. The contractor removed the soft/loose soils and Golder checked the overexcavated areas using a'/ -inch fiberglass T-Probe in the areas shown in blue and red in Figure 1. The exposed subgrade soils in these areas were generally firm and were considered suitable for foundation support. Figure 1: (Not to Scale. Approximate measurements.) _.. _b kri H u 7 LT -L UE E � FE E E f FE"•E E m �� F LEGEND 0 Passing (Yields 1/8" -3") m Failed (Yields 5" -8"( f 0 Removal Req.(Clay Like( V i. A 22130 HIGHWOAOY-% DA .� " jA>iCECIL IOCWT� ` N eno� . FOUNDATION DRAIN PLAN Page 2 of 2 SIGNED: /Z-'� Margaret Pryor — Project Manager COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE:1600 OFFSITE:1630 SITE ACTIVITIES THE FOLLOWING WAS NOTED: DATE: Friday, September 12, 2018 JOB NO: �1533298 PROJECT: Lynnwood Mazda Dealership LOCATION: Lynnwood, WA CONTRACTOR: Wilcox Construction Inc. OWNER: Lynnwood Mazda WEATHER: Sunny TEMP (°F): 65 PRESENT AT SITE: Golder — Max Rossiter FOUNDATION COMPACTION TESTING: Golder was requested to assess condition of subgrade areas that were previously excavated. Golder used a '/2-inch diameter steel T-probe to check footing subgrade conditions. Footing subgrade generally consisted of moist, dense, silty sand with gravel and allowed less than 3" of penetration using the T-probe. Based on the field observations, the subgrade is considered suitable for supporting the anticipated footing loads. Page 2 of 2 SIGNED: Ma Rossiter —Staff Engineer COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 0840 OFFSITE: 1020 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Friday, December 7, 2018 11533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction/ICI Doug lke ami WEATHER: TEMP (°F): Sunny 30s-45 PRESENT AT SITE: Golder — David Lam ICI —Mike Sawyer Golder arrived onsite and spoke with Mike Sawyer with ICI. Fill placement was taking place in the nothwest portion of the bulding. Golder used a'/Z inch diameter fiberglass T-probe to check the footing subgrade compaction. Portions of the site were filled to grade and two feet of additional fill was placed in the west portion of the fill placement area in 12-inch thick loose lifts and was compacted using a CAT 315FL mounted hoe pack using the moist, silty sand with gravel that was stockpiled onsite. Fine grading was done using a Hitachi Zaxis 30OLC with an excavator bucket and the fill was compacted using a vibratory plate compactor. Golder then used a'/2 inch diameter fiberglass T-probe to check footing subgrade fill compaction. The footing subgrade checked was firm and yielded less than inch to the T-probe and was found to be suitable for supporting the anticipated footing. The subgrade generally consisted of moist, dense, silty sand with gravel and was firm and unyielding to the T-probe. Based on the field observations, the subgrade was found to be suitable. Figure 1 Picture of footing subgrade at the beginning of the day, picture taken facing east. Page 2 of 2 Figure 2 Picture of footing subgrade preparation after about 2 feet of fill was placed and compacted, picture taken facing west. COPIES TO: Wilcox Construction File SIGNED: L, David Lam — Field Technician Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1425 OFFSITE: 1520 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Monday, December 11, 2018 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction/ICI Doug Ikegami WEATHER: TEMP ff): Cloudy - 40 PRESENT AT SITE: Golder - Ted Sager ICI -Wade Golder arrived onsite and spoke with Wade, ICI. The contractor had placed several feet of backfill using on site sourced silty, sand with some gravel occasional cobbles. The backfill had been placed against the NE corner of the stormwater vault, approximately 45 x 14 linear feet along the north wall headed west, and 35 x 20 linear feet along the east wall headeded south and around the 4 type 11 storm drain manhole structures to the east. Golder observed the contactor complete compaction of the final lift of the day using a CAT 315FL mounted hoe pack, a CAT CB24B double drum vibratory roller, and a jumping jack against the vault walls and manhole structures. The compacted material was firm under foot and apeared to be close to optiumum moisture content. Golder used a'/2 inch diameter steel T-probe to check the compacted fill for penetration. All areas checked were frim and yielded no more than about 1 inch to the T-probe. Golder walked and checked previoulsy placed backfill south of the vault and north of the main building wall. The several feet of material was firm and yielded about 1-2 inches below about 1 inche of surfucal mud caused by the recent rains. Based on our observations and checks using the soil T-probe the backfill appered to be suitable for support of the anticipated asphalt parking area loads. Golder will return tomorrow, Tuesday, December 12 to collect a representative soil sample for Modified Proctor analysis for nuclear/moisture density testing of future placed backfill soils. Figure 1: North vault backfill, looking east. Page 2 of 2 Figure 2: Previously placed and compacted backfill between the vault (right0) and the building (left), looking west. SIGNED: Ted L. Sager— Project Geologist COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1400 OFFSITE: 1430 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Wednesday, January 2, 2019 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction/ICI Doug Ikegami WEATHER: TEMP ff): Overcast 40s PRESENT AT SITE: Golder — David Lam ICI —Wade Golder arrived onsite and spoke with Wade with ICI. The contractor had placed about 1.5 feet of fill in two lifts over the stormwater vault in an approximately 120' L x 50' W area. Golder observed the compaction of the final lift of the day with a CAT CB24B double drum vibratory roller. The fill generally consisted of moist, dense, silty sand with gravel. Three density tests were taken on the fill with a Troxler 3440 nuclear densometer. Based on the field observations, the mentioned subgrade was found to be suitable for supporting the anticipated asphalt parking area loads or additional fill placement. ICI previously compacted the area in the northwest area west of the concrete building footings. The compacted material was observed to be pumping when walked on in some areas. ICI will leave the material alone to moisture condition before placement of any more material. ICI will place more material between the vault and the building if the weather permits in the following days. NIGHT - Vim Figure 1 Picture of fill placed above the vault, picture taken facing west from the east side of the vault. Page 2 of 2 DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades.) The results of our density testing indicated that compaction of the tested soil was in general accordance with the plans and specifications (at least 95% of maximum dry density: ASTM D-1557 for pavement and structural subgrades). Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Test No. Depth Dry Density (PCF) Wet Density (PCF) Moisture (PCF) Moist. (%) Proctor %Comp GF-14 0.5 ft 128.2 137.2 9.0 7.0 135.2 95 GF-15 0.5 ft 130.9 142.2 11.3 8.7 135.2 97 GF-16 0.5 ft 134.2 146.6 12.4 9.3 135.2 99 N �-i - , - , --TENHANCED ATER VIA MODULAR W - SEE SHEE About 1.5 fNt of All placid h— tod.y SIGNED: David Lam — Field Technician COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1445 OFFSITE: 1515 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, January 8, 2019 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction/ICI Doug Ikegami WEATHER: TEMP ff): Overcast/Rain 40s PRESENT AT SITE: Golder — David Lam ICI —Wade Golder arrived onsite and spoke with Wade with ICI. The contractor had excavated for, installed, and backfilled about 30 feet of storm drain piping along the southeast side of the new sales building. The approximately 2 to 4 feet deep trench was backfilled in lifts using the excavated moist, dense, silty sand with gravel and compacted with a jumping jack. Golder collected the imported 5/8 inch minus crushed rock sample and brought it to the Golder Soil Laboratory in Redmond, WA for sieve analysis and Modified Proctor analysis. Figure 1 Picture of backfill over storm pipe installation, picture taken facing east on the south side of the jobsite. Page 2 of 2 DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades.) The results of our density testing indicated that compaction of the tested soil was in general accordance with the plans and specifications (at least 95% of maximum dry density: ASTM D-1557 for pavement and structural subgrades). Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Test No. Depth Dry Density (PCF) Wet Density (PCF) Moisture (PCF) Moist. (%) Proctor %Comp GF-17 1 ft 129.1 140.6 11.5 8.9 135.2 96 0 o PROPOSED CONCRETE 19 LF 12" SD DETENTION VAULT SEE SHEET C4.30 F C8 2 11 AREA DRAIN 1- FOUNDATION DRAIN, '. RIM= 346.70 SEE SHEET C4.02 IE OUT= 344.70 (6" S) T 3 IF 6" SD 5242% ) L J NEW MAZDA SALES BUILDING L J J L Q N FF=357.00 LOWER LEVEL FF-347.00 DISPLAY DECK j EL-357f r �I / I I f 69 LF 6" SD / I r� I LJ LJ LJ L-1 j. ING GRID LINESK M � I / H'L & STRUC'L 3 I TRENCH DRAIN 6" SD 20 LF 6 SID / PLANS (TYP) M I ELEV= 346.98 - TRENCH DRAIN 7% 5-7.0 P E f SEE DETAIL 3, IE-345.5D o SHEET C4.21 rr-�� II I o z II I I 13 LF 12 SD I ` UPSTREAM BYPASS LINE (PROTECT IN PLACE) - -- - - ADJUST EXISTING RIM F TO GRADE (TYP) / IE IN=346.61 (6" N) SIGNED: OA 0, 7 LF 6" SD S=16.78% GF-17 / RIM TO GRA�OE 23 LF 8" SD S=14.04% / INSTALL OVER EX. SC (POTHOLE PRIOR TO / CONSTRUCTION) 20 LF 12' SD S=0.80% W/ PIPE CASING PER DETAIL SDCO RIM TO GRADE^ IE=344.25 DECK DESIGN BY ARCH'L. PROVIDE SD CONNECTION TO PUMP STATION #1. CONTRACTOR TO COORDINATE. 199 LF 2" PVC SCH 40 PUMP LINE E T E 6'30"W 90.54' CB #10 / PUMP STATION #1 .�/ PUMP RUNOFF FROM / FIRE LANE TO T / DETENTION FACILITY F- T !I- EI i inn �o LLo niioi [v David Lam — Field Technician COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1435 OFFSITE: 1510 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Friday, January 18, 2019 1533298.500 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction/ICI Doug Ikegami WEATHER: TEMP ff): Cloudy 40s PRESENT AT SITE: Golder — T. Sager ICI —Wade Golder arrived onsite and spoke with Wade with ICI. The contractor had backfilled for installation of about 20 feet of sanitary sewer piping along the southeast side of the new sales building using onsite excavated soil using a jumping jack to compact the trench soil. Golder performed one nuclear density test at roughly subgrade elevation over the backfilled trench. Figure 1: Sewer parallel to south wall of building looking east. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades.) The results of our density testing indicated that compaction of the tested soil was in general accordance with the plans and specifications (at least 95% of maximum dry density: ASTM D-1557 for pavement and structural subgrades). Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Test No. Depth Dry Density (PCF) Wet Density (PCF) Moisture (PCF) Moist. M) Proctor %Comp GF-18 0 ft 134.3 142.5 11.0 8.2 135.2 99 SIGNED: e/ Ted L. Sager — Project Geologist COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1420 OFFSITE: 1510 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, January 22, 2019 1533298.500 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction/ICI Doug Ikegami WEATHER: TEMP ff): Rain 40s PRESENT AT SITE: Golder — T. Sager ICI —Wade Golder arrived onsite and spoke with Wade, the on site foreman (Wilcox/ICI). The contractor was completing compaction of backfill around the grated lid of CB #1 located along the curb line for SR-99 using 5/8-inch crushed rock and compacting with a jumping jack mechanical compactor. Golder performed one nuclear density test at curb subgrade elevation. Figure 1: CB 1 and curb line crushed rock subgrade. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades established by the contractor.) The following nuclear moisture/density data was obtained, and the back calculated results are as follows: Test No. Depth Dry Density (PCF) Wet Density (PCF) Moist. (%) Proctor %Comp GF-1 0 ft 131.5 139.5 6.1 137.7 95 SIGNED: Ted L. Sager — Project Geologist COPIES TO: Wilcox Construction File Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE:0745 OFFSITE:0815 SITE ACTIVITIES THE FOLLOWING WAS NOTED: DATE: Monday, March 25, 2019 JOB NO: �1533298 PROJECT: Lynnwood Mazda Showroom LOCATION: Lynnwood, WA CONTRACTOR: Wilcox Construction Inc. OWNER: Lynnwood Mazda WEATHER: Sunny TEMP (°F): 65 PRESENT AT SITE: Golder — Max Rossiter FOUNDATION COMPACTION TESTING: Golder was requested to assess condition of subgrade areas that were previously excavated. Golder representative, Max Rossiter, used a '/2-inch diameter steel T-probe to check footing subgrade conditions. Footing subgrade generally consisted of moist, dense, silty sand with gravel and allowed less than 3" of penetration using the T-probe. The footing area on the Northwest corner of the site had a leveling rock base coarse approximately 3" thick in the location of the strip footing. Based on the field observations, the subgrade is considered suitable for supporting the anticipated footing. Figure 1: Footing subgrade on east side of site looking north (left) and south (right). Page 2 of 2 h N •'+'fit. sr 49, Figure 2: Footing subgrade located on Northwest corner of site. SIGNED: 6� //&� Max Rossiter — Staff Engineer COPIES TO: Wilcox Construction File r. Page 1 of 2 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOLDER TO: Doug Ikegaml - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE:0930 OFFSITE:1215 SITE ACTIVITIES THE FOLLOWING WAS NOTED: DATE: Thursda, June 27, 2019 JOB NO: �1533298 PROJECT: Lynnwood Mazda Showroom LOCATION: Lynnwood, WA CONTRACTOR: Wilcox Construction Inc. OWNER: Lynnwood Mazda WEATHER: Sunny TEMP (°F): 70 PRESENT AT SITE: Golder — Max Rossiter FOUNDATION COMPACTION TESTING: Golder was requested to assess condition of subgrade for the curblines circled in figure 1. Golder representative, Max Rossiter, noted that the curbline subgrade consisted of native moist, dense, gravelly silty sand in all areas except in the northwest corner of the site (outlined in figure 1). Native gravelly silty sand material was placed up to about 8" in thickness in this area. All curbline areas were covered with an approximately 2"-thick leveling course (Fgure 2). Golder used a 1/2 -inch diameter fiber -glass T-probe to check footing subgrade conditions. The native subgrade material and leveling course were firm and unyielding to the T-probe. A nuclear density gage was used to test for relative compaction of the fill in the northwest corner (figure 3). The nuclear density gage showed that the fill was compacted to approximately 82.5% and 94.0% relative density on the west and east side of the curb peninsula, respectively. Golder informed the site foreman. The contractor proceeded to recompact the fill and leveling course with a vibratory hand compactor. After recompaction, the nuclear density gage showed that the fill was compacted to approximately 95.1 % and 96.7% relative density on the west and east side of the curb peninsula, respectively. Based on the field observations, the subgrade is considered suitable for supporting the proposed curb structure. ENS%//� law _pa �!!!!!;EIIllill6' Figure 1: Site plan showing the curbline areas inspected and nuclear gage testing locations. Note the area marked as recompacted fill. Page 2 of 2 Figure 2: Prepared curbline subgrade and leveling course. 1 Figure 3: Testing using the nuclear density gage in the area of recompacted fill. SIGNED: Ma Rossiter —Staff Engineer COPIES TO: Wilcox Construction File ATTACHMENT 2 Laboratory Analyses Golder Associates Inc. 1/14/19 1533298.500 PARTICLE SIZE DISTRIBUTION ASTM C136 and C117-17 PROJECT NAME: Dougs/Lynnwood Mazda Inrd/WA SAMPLE ID: 1/8/2019 TYPE: GRAB 12" 3" 2" 1" 34' 3/8" #4 #10 #20 #40 #60 #100 #200 100 90 80 70 P 60 a s 50 s i 40 n g 30 20 10 0 1000 100 10 1 0.1 0.01 0.001 Particle size in millimeters Coarse Fine Coarse Medi- Fine Silt or Clay COBBLES GRAVEL SAND FINES Particle Size Particle Size /mml %Paccino Classifiratinn Pernent- 12.0" 304.8 100.0 Cobbles 0.0 6.0" 154.2 100.0 3.0" 75 100.0 2.5" 63.5 100.0 Coarse Gravel 0.0 2.0" 50 100.0 1.5" 37.5 100.0 1.0" 25 100.0 0.75" 19 100.0 0.375" 9.5 100.0 Fine Gravel 12.5 #4 4.75 87.5 #10 2.00 57.9 Coarse Sand 29.6 #20 0.85 19.9 Medium Sand 43.2 #40 0.43 14.7 #60 0.25 11.9 Fine Sand 6.8 #100 0.15 9.9 9200 0.075 7.9 Fines 1 7.9 D60= 2.1 1 D30= 1.07 D10= 0.15 Cu=D60/D10= 13.8 > 6 Cc = D30^2/(D10*D60) = 3.5 > 3 DESCRIPTION: gravelly SAND some fines USCS: SP Moisture Content $.21 DATE RBK 1/14/18 MLP JGJ Golder Associates Inc. Golder Associates Inc. 12/13/18 1533298.500 PARTICLE SIZE DISTRIBUTION ASTM C136 and C117-17 PROJECT NAME: Dougs/Lynnwood Mazda Inrd/WA SAMPLE ID: 12/11/2018 TYPE: GRAB 12" 3" 2" 1" 34' 3/8" #4 #10 #20 #40 #60 #100 #200 100 90 7\' 80 70 P 60 a s 50 s i 40 n g 30 20 10 0 1000 100 10 1 0.1 0.01 0.001 Particle size in millimeters Coarse Fine Coarse Medi- Fine Silt or Clay COBBLES GRAVEL SAND FINES Particle Size Particle Size /mml %Paccino Classifiratinn Pernent- 12.0" 304.8 100.0 Cobbles 0.0 6.0" 154.2 100.0 3.0" 75 100.0 2.5" 63.5 100.0 Coarse Gravel 4.2 2.0" 50 100.0 1.5" 37.5 100.0 1.0" 25 98.7 0.75" 19 95.8 0.375" 9.5 83.9 Fine Gravel 23.6 #4 4.75 72.3 #10 2.00 60.4 Coarse Sand 11.9 #20 0.85 49.8 Medium Sand 22.0 #40 0.43 38.4 #60 0.25 29.2 Fine Sand 20.6 #100 0.15 23.4 #200 0.075 17.9 Fines 1 17.9 D60= 1.94 1 D30= 0.26 Dto= #N/A Cu = D60/D10 = #N/A #N/A Cc = D30A2/(D10*D60) _ #N/A #N/A DESCRIPTION: gravelly SILTY SAND USCS: SM Moisture Content 11.12 DATE RBK 12/13/18 MLP JGJ Golder Associates Inc.