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1533298-Rev0-Final Inspection Report-092420G GOLDER September 24, 2020 Project No. 1533298 Doug Ikegami Doug's Lynnwood Mazda SPECIAL INSPECTION — SOILS; DOUG'S LYNNWOOD MAZDA SERVICE CENTER AND HYUNDAI IMPROVEMENTS, EDMONDS, WASHINGTON Dear Mr. Ikegami: Attached are final field reports and laboratory test results for special inspections of soils for the Doug's Lynnwood Mazda Service Center and Hyundai Showroom improvements. Golder Associates Inc. (Golder) provided geotechnical construction observation services between October 2019 and August 2020. During our special inspection, Golder observed the following components of construction: ■ Subgrade inspections for native and fill soils, including nuclear density testing (ASTM D 6938) ■ Laboratory test results (ASTM C136/C117 & ASTM D1557) Based on our involvement with the project, these components observed by Golder were completed in general accordance with the approved drawings and engineer -approved changes. Specific details of our observations are contained in our daily field reports. The daily reports are attached as Attachment 1 and Laboratory Test Results are attached as Attachment 2. Please contact us should any additional information be required. Sincerely, Golder Associates Inc. �,YtET L. O S7' 38 4� �SSy10vml �t��• ►h"� Ted Sager, LG Margaret Pryor, PE Project Geologist Senior Engineer CC: Michael Isaacs, Project Manager, Wilcox Construction, Inc. Attachments: Attachment 1a — Mazda Service Center Attachment 1 b — Hyundai Showroom Improvements Attachment 2 — Laboratory Testing p:\projects\2015\1533298 mazda\2020-2018 reports and lab\final report\1533298-rev0-final inspection report-092420.docx 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 ATTACHMENT 1 Field Reports ATTACHMENT 1A Mazda Service Center Page 1 of 3 18300 NE Union Hill Road, Suite 200 Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 GOL❑ER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1200 OFFSITE: 1315 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Wednesday, October 2, 2019 �1533298 PROJECT: Lynnwood Mazda Dealer Service Center LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction/ICI Doug Ike ami WEATHER: TEMP (°F): Sunny 62 PRESENT AT SITE: Golder — Max Rossiter Wilcox Construction— Shane Golder arrived onsite and spoke with Shane with Wilcox Construction. The contractor had excavated for, installed, and backfilled about 250 feet of water piping along the south side of 76t" Ave W. The trench was backfilled using the excavated moist, dense, gravelly sand and sandy gravel. The materials were compacted with a jumping jack. .r p Figure 1 North end of roadway cut, in front of Mazda driveway, looking west. Page 2 of 3 Figure 2 Roadway cut on east side of 76"' Ave W, looking north. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades.) 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-1 1 ft 124.3 134.6 10.3 8.3 137.7 97.7 GF-2 1 ft 127.2 135.3 8.1 6.4 137.7 98.3 GF-3 1 ft 127.9 134.7 6.8 5.3 137.7 97.8 GF-4 1 ft 126.7 136.1 9.4 7.4 137.7 98.8 GF-5 1 ft 122.4 126.7 4.3 3.5 132.3 95.8 G F-6 1 ft 125.0 130.3 5.3 4.2 132.3 98.4 -76TH AVE W 3F-1 GF 6 Page 3 of 3 SIGNED: Margaret Pryor — Project Manager for Max Rossiter COPIES TO: Wilcox Construction File COPIES TO: Wilcox Construction File COPIES TO: Wilcox Construction File COPIES TO: Wilcox Construction File Page 1 of 3 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: 0810 OFFSITE: 0930 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Wednesday, January 8, 2020 11533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff): Overcast 40 PRESENT AT SITE: Golder — David Lam Wilcox Construction — Howard Snohomish County Excavating SCE - Kyle Golder arrived onsite and spoke with Howard with Wilcox Construction and Kyle with SCE. The contractor previously excavated for, installed, and backfilled portions of the storm drain system at the following locations: • from existing catch basin CB #100 to about 40 feet west • from existing catch basin CB #101 to catch basin CB #7. The trenches were backfilled using the excavated moist, dense, sandy gravel and compacted with a track mounted hoe pack and/or jumping jack. Imported 5/8 inch crushed rock was used in the upper approximately 6-inches of backfill. The density tests of the trench backfill west of existing CB #100 did not meet site plan specifications. The contractor was notified and will rework and recompact the area later today or early tomorrow. Golder will retest the area once the area once the area has been recompacted. The density test results in the backfill soil between existing CB #101 and CB #7, is listed below. When Golder left the jobsite, the contractor was excavating for and installing the storm drain system from CB #7, north toward proposed CB #8. The the contractor plans to backfill this portion of the approxiamtely 3-foot deep storm drain trench tomorrow using the excavated soils. Golder will test this portion of the strom drain trench backfill once it has been completed. Golder collected a sample for Modified Proctor analysis of onsite soil from an excavation about 75 feet north from CB #7 at a depth of 2 feet from existing ground surface. The material collected consted of gray -brown, moist, dense, sandy, gravel with trace silt, and cobbles (Sample ID #010820). The sample was returned to the Golder Soil Laboratory in Redmond, WA for Modified Proctor and grain size analyses. Page 2 of 2 Figure 2 Storm drain system backfill between existing CB #101 and CB #7. Contractor installing storm drain system from CB #7 north, looking northwest. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moist) re MaximumRequired Dry Field Test No. Depth BEGS Location Density Density D s ty Compaction Compaction (in.) (ft) (pcf) (pcf) ct ( /a) ( /o) GF-7 10 0 —15' E of CB #7 134.9 139.9 3.7 137.7 95 98 Page 3 of 2 OOWNECT TD DWONG a - s soe 51, MER SLOPE MOM I 9 IF a' Pkt 0 TO . I ax MH. SLOK To 7SOU*—LM�ING U CU ' IE=352.52 51 5T� I i I 95 1 : _ . v iti..co EVL OR ee wmo w� i GF-7 a_ cR !I`ai t 7' N I CSTORY UNE fox tRO w TO IYAT `1 auwTY MUM COPIES TO: Wilcox Construction File FIELD REPORT SIGNED: 02�� David Lam — Environmental Scientist Page 1 of 3 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: 1200 OFFSITE: 1245 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Thursday, January 9, 2020 11533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Cloudy 37 PRESENT AT SITE: Golder — David Lam Wilcox Construction — Howard Snohomish County Excavating SCE - Kyle Golder retested the approximately 40 foot long by 3 foot wide area west of existing CB #100 mentioned in the January 8, 2020 report. The area was not reworked. The density test of the backfill again did not meet minimum site specifications for density. Contractor was notified and said they will recompact the above mentioned portion of trench backfill. Golder will retest the area for density after it has been recompacted. The contractor previously excavated for, installed, and backfilled storm drain system from catch basin CB #7 to CB #8. The trench was backfilled using the excavated moist, dense, sandy gravel and compacted with a track mounted hoe pack and jumping jack. Imported 5/8-inch crushed rock was used for the upper, approximately 6-inches of backfill. The density tests between CB #7 and CB #8 met minimum site specifications for density. The results and approximate locations area presented below. Figure 1 About 30 feet of storm drain system backfill from existing CB #100, looking west. Page 2 of 3 Figure 2 Storm drain system backfill between CB #7 and CB #8, looking south. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture MaximumRequired Dry Field Test No. Depth BEGS Location Density Density Density Compaction Compaction (in.) (ft) (pcf) (pcf) GF-8 12 0 —25' N of CB #7 134.7 143.0 6.1 137.7 95 98 Pass GF-9 10 0 —13' S of CB #8 132.2 137.5 4.0 137.7 95 96 Pass GF-10R 10 0 —30' W of ex CB #100, 126.0 129.6 2.8 137.7 95 92 Fail failed area from 1/8/20 *R denotes a retest Page 3 of 3 �a Y l iT , s.�sn r . G F-9 �LFrio- F" 0C T. Fl F-8 do LM1 WLMGI a II M d- U4 iSmkE q ldle 7aa fR€I'ifF 0 :{+IitrG1 + I 2% W% I%�1or I 1 F-R dw h �• L 91 M 9E Lla eA p7t:�l e F aAM r,Irn; IL ff r F' ,' - dfKldW I4+- r Mw COPIES TO: Wilcox Construction File lug r 1!mrs7r7Rl w I I, FIELD REPORT SIGNED: 024 David Lam — Environmental Scientist Page 1 of 1 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: 1215 OFFSITE: 1245 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Monday, February 3, 2020 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Cloudy High 30s PRESENT AT SITE: Golder — David Lam Wilcox Construction — Howard Snohomish County Excavating SCE - Kyle The contractor began the excavation for footing subgrade for the . At the time of Golder's visit, only the footing subgrade at the crossing of gridlines J and 2 was exposed. The subgrade soil consisted of brown, moist, sandy, gravel. Golder used a'/2-inch, diameter, steel -tipped, fiberglass T-probe to check subgrade conditions of the above mentioned building footing subgrade area. The subgrade was found to be firm and yielded less than '/2-inch to the T-probe. At the time of Golders site visit, the building footing subgrade at gridline J and gridline 2 appered to be suitable for support of the anticipated building loads of up to observations and appeared to be suitable for the anticiated building foundation loads. Figure 1 Excavated footing subgrade at the crossing of gridlines J and 2, looking southwest. NO DENSITY TESTS TODAY COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: David Lam — Environmental Scientist 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: 1410 OFFSITE: 1450 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, February 4, 2020 11533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Rain/snow Mid 30s PRESENT AT SITE: Golder — David Lam Wilcox Construction — Howard Snohomish County Excavating SCE - Kyle The contractor continued excavation for the service center building footing subgrade. At the time of Golder's visit, the following footing subgrade areas were checked: • along J-Line from 2-Line through 4-Line • along 2-Line from H-Line to J-Line, and • along 5-Line from B-Line to J-Line. Golder used a'/2-inch diameter, steel -tipped, fiberglass T-probe to check the footing subgrade conditions. The subgrade areas checked, in general, consisted of moist, dense, sandy gravel, some moist, dense, silty sand, and some moist, dense, silty gravel. The subgrade areas were found to be firm and yielding less than inch, and occasionally up to 2-inches to the T-probe. At the time of Golder's site visit, the subgrade areas checked appeared to be suitable for the support of the anticipated building footing loads. Figure 1 Excavated footing subgrade at the crossing of gridlines J and 2, looking southeast. Page 1 of 5 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: 0930 OFFSITE: 1000 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, February 11, 2020 �1533298 PROJECT: Lynnwood Mazda - Service Center LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Cloudy Mid 40s PRESENT AT SITE: Golder — Emily Williams Wilcox Construction — Howard Snohomish County Excavating SCE - Kyle The contractor continued excavation for footing subgrade. Golder checked the footing subgrade surface excavation for penetration at the following locations: • Spread footing along 5-Line, from A -Line to J-Line • Spread footing along A -Line, from 1-Line to 5-Line • Spread footing along 2-Line, from G-Line to J-Line • Spread footing along G-Line, from 1-Line to 2-Line • Isolated footing at 4-Line and I -Line • Isolated footing at 4-Line and H-Line • Isolated footing at 4-Line and approximately FA • Isolated footing at 3-Line and I -Line • Isolated footing at 3-Line and H-Line Golder used a'/2-inch diameter, steel tipped, fiberglass T-probe to check the subgrade surfaces of the above mentioned subgrade areas. The subgrade areas checked generally consisted of moist, dense, sandy gravel, some moist, dense, silty sand, and some moist, dense, silty gravel. The subgrade areas checked were found to be firm and in general yielded less than 1-inch and ocassionally up to 4 inches to the T-probe. At the time of Golder's site visit the foundation subgrade conditions of the above mentioned areas appreared to be suitable for the anticipated building loads. Golder observed what appeared to be a sheen on standing water at the subgrade elevation along 1-Line between B-Line and C- Line. The odor of petroleum was noted along A -Line between 1-Line and 4-Line with black staining observed on A -Line between 3-Line and 4-Line. Golder inforormed Wilcox Construction Superintendent Howard Negri of the staining, odor, and sheen observed by the Golder representative. Page 1 of 5 I 18300 NE Union Hill Road, Suite 200 I Redmond, WA USA 98052-3333 Tel: (425) 883-0777 Fax: (425) 882-5498 LDER TO: Doug Ikegami - Doug's Lynnwood Mazda 22130 Highway 99 Edmonds, WA 98026 ONSITE: 0930 OFFSITE: 1000 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, February 11, 2020 �1533298 PROJECT: Lynnwood Mazda - Service Center LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Cloudy Mid 40s PRESENT AT SITE: Golder — Emily Williams Wilcox Construction — Howard Snohomish County Excavating SCE - Kyle The contractor continued excavation for footing subgrade. Golder checked the footing subgrade surface excavation for penetration at the following locations: • Spread footing along 5-Line, from A -Line to J-Line • Spread footing along A -Line, from 1-Line to 5-Line • Spread footing along 2-Line, from G-Line to J-Line • Spread footing along G-Line, from 1-Line to 2-Line • Isolated footing at 4-Line and I -Line • Isolated footing at 4-Line and H-Line • Isolated footing at 4-Line and approximately FA • Isolated footing at 3-Line and I -Line • Isolated footing at 3-Line and H-Line Golder used a'/2-inch diameter, steel tipped, fiberglass T-probe to check the subgrade surfaces of the above mentioned subgrade areas. The subgrade areas checked generally consisted of moist, dense, sandy gravel, some moist, dense, silty sand, and some moist, dense, silty gravel. The subgrade areas checked were found to be firm and in general yielded less than 1-inch and ocassionally up to 4 inches to the T-probe. At the time of Golder's site visit the foundation subgrade conditions of the above mentioned areas appreared to be suitable for the anticipated building loads. Golder observed what appeared to be a sheen on standing water at the subgrade elevation along 1-Line between B-Line and C- Line. The odor of petroleum was noted along A -Line between 1-Line and 4-Line with black staining observed on A -Line between 3-Line and 4-Line. Golder inforormed Wilcox Construction Superintendent Howard Negri of the staining, odor, and sheen observed by the Golder representative. Page 2 of 5 PHOTOGRAPHS Photo 1: Excavated footing subgrade at the crossing of gridlines 2 and 3, G through I, looking east. m Ar LO O LO O O� d 0 H N W a 0 U m LL Page 1 of 3 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: 0830 OFFSITE: 0845 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Thursday, February 13, 2020 �1533298 PROJECT: Lynnwood Mazda - Service Center LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Cloudy, light rain Mid 40s PRESENT AT SITE: Golder — Neil Gilham Wilcox Construction — Howard Negri Snohomish County Excavating SCE - Kyle Golder arrived onsite to visually review reported soil impacts and surface water sheen observed by Golder on February 11, 2020. The perimeter trenches were already filled with crushed rock. There was no standing water, so no sheen could be observed. Using a hand -trowel, Golder probed selected areas along A -Line and 1-Line. No petroleum -like odors were noted or other indications of petroleum product release. Dark soil was observed along A -Line that was noted by Golder on February 11, 2020. Additional excavation appeared to have occurred in this area. The black soil had an organic odor that did not resemble a petroleum product or solvent. A shard of leather was observed in the dark soil area. According to Howard, the site had once been a tannery. PHOTOGRAPHS Photo 1: View of A -Line looking east showing the dark soil area. Ay 14. 40 b" Page 3 of 3 SIGNED: .. , Neil Gilham, LG — Sr. Environmental Scientist 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 0805 OFFSITE: 0830 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Monday, March 16, 2020 �1533298 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Clear Mid 30s PRESENT AT SITE: Golder — David Lam Wilcox Construction — John Ortiz At the time of Golder's site visit, the contractor had excavated for building foundation subgrade at the following locations for the Hyundai Sales and Service building: • the isolated spot footings along gridline G located at G-2, G-3, G-4 and G-5, • the entire continuous perimeter spread footings for "Showroom 100" room, • the continuous perimeter spread footing for the "Service Reception 114" room between grid lines 5 and 7. Golder used a'/2 inch diameter, steel tipped, fiberglass, T-probe to check subgrade conditions of the above mentioned subgrade areas, with the exception of about an about 8-foot section north and west from the southeast corner of the "Service Reception 114" footing subgrade. At that location, Wilcox was excavating for installtion of the side sewer line adjacent to the eastern footing subgrade. The subgrade checked generally consisted of native moist, dense, sand and gravel with trace silt. At the time of Golder's observations the subgrade areas were found to be firm and, in general, yielded less than 2 inches, with a few islolated areas up to 3-inches to the T-probe. The subgrade appeared to be suitable for the support of the anticipated design loads of 4,000 psf. The footing subgrade in the southeast corner of the "Service Reception 114" room adjacent to the side sewer exavation will be checked at our next site visit, or when completed. Figure 1: Excavated footing subgrade at the northeast corner of "Showroom 100" building, photo taken facing southwest. Page 2 of 2 Figure 2: Excavated footing subgrade at the southwest corner of "Service Reception 114" building, excavation for side sewer in the southeast corner of proposed building in background, photo taken looking east. NO DENSITY TESTS TODAY COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: F-ak David Lam — Environmental Scientist 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 0815 OFFSITE: 1015 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Wednesday, March 18, 2020 �1533298 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP (°F): Overcast Mid 30s PRESENT AT SITE: Golder — David Lam Wilcox Construction — John Ortiz At the time of Golder's visit, the contractor was backfilling over approxiamatley 30-feet of sanitary side sewer located adjacent to the eastern perimeter footing subgrade for the "Service Reception 114" room of the Hyundai Sales and Service building. This backfill included the southeast corner of the perimeter footing subgrade for the "Service Reception 114" room as mentioned in Golder's March 161", 2020 field report. The approximately 6-foot deep trench was backfilled in lifts using the excavated native sand and gravel with trace silt soils. Compaction was achived with a jumping jack. Density tests were taken over the side sewer run backfill and footing subgrade backfill. The test results indicatd compacation met site specification. See density test results and approximate testing location map below. Figure 1 Uncompacted side sewer run along the east side of proposed "Service Reception 114" building, photo taken looking south. Page 2 of 2 ram".------.----------� .� �4. R..:i�a 'sal. Figure 2 Backfilled footing subgrade (between white spray paint lines) and partially backfilled sanitary sewer run at the southwest corner of "Service Reception 114" building, photo taken looking north. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture MaximumRequired Dry Field Test No. Depth BEGS Location Density Density (/o) Density Compaction Compaction (in.) (tt) (pct) (Pct) (%) M) GF-11 12 3 SE corner of footing 125.1 134.9 7.9 131.4 95 95 GF-12 12 1.5 Side sewer run 129.6 139.5 7.6 131.4 95 99 CONNECT RTO FN►iEF SEVEFlWCOGLMO f COOROPNiF,) N8906"3"W 3M.59' NIIXUM k PROTECT 6 9DE 6F>•FR N CONNED 40E SflMFtt CORNEOTgN J. COl0ECf10N E. 350.07 TO SSCO }: TO GRADE _ i i x9.eT Pol TO O lflurt =_y SIDEsErER u II PRIORR TO to CONSTRUCTION Y .TVY1P CONNECT TO DVING r .. W 65 COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: fl2 �D!avi�d Lam — Environmental Scientist 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: 0910 OFFSITE: 1000 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: Monday, April 27, 2020 JOB NO: �1533298 PROJECT: Lynnwood Mazda - Service Center LOCATION: Edmonds, WA CONTRACTOR: Wilcox Construction OWNER: Doug Ike ami WEATHER: Cloudy TEMP ff): Mid 40s PRESENT AT SITE: Golder — Ted Sager Wilcox Construction — Howard Negri On site at the request of the contractor to observe soil subgrade conditions prior resuming slab -on -grade capillary break placement for the building. The subgrade consisted, in general of medium brown, dense to very dense, gravelly, silty -sand to gravelly sand with some cobbles. Much of the subgrade was covered with 1 to 2 inches of wet mud and some standing water, due to the nearly 4 week stop in construction and recent rain over the previous weekend. Golder checked the slab -on -grade subgrade surface probing through any areas of mud and standing water for the entire footprint of the Service Center building using a 1/2-inch diameter, steel, T-probe. The subgrade soil conditions (including any areas of 1 to 2-inches of mud and/or standing water were found to be firm and consistently yielded no more than'/2-inch to the T-probe. Golder recommends removing any mud, slime or standing water across the building on slab -on -grade surface prior to placement of any capillary break material. At the time of Golder's site visit the observed soil conditions for the Service Center slab -on -grade subgrade appeared to be suitable as long as any areas of mud, slime and/or stading water are removed prior to capillary break material. PHOTOGRAPHS Photo 1: Service Center slab -on -grade soil conditions looking NW from center of site. NO DENSITY TESTS Page 2 of 3 COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: Ted L. Sager, LG — Project Geologist 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: 1155 OFFSITE: 1310 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, June 9, 2020 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff): Overcast 51-59 PRESENT AT SITE: Golder — Ted Sager Wilcox Construction — Howard Snohomish County Excavating (SCE) The contractor had placed about 2-4 feet of soil backfill along the west outside wall of the "New Mazda Service Building". The contractor used onsite stockpiled brown, gravelly, sand with silt, as backfill material. The backfill material was transported from the stockpile and placed lifts using a front-end loader. The fill was compacted using a track mounted excavator with an attached hoe pack. Golder performed 4 nuclear density tests on the compacted backfill. The test results are listed below, and the approximate test and fill locations can be found on the attached map. Figure 1: Compacted exterior wall backfill, at the northwest corner of the New Service Center Bldg. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. Page 2 of 2 The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture MaximumRequired Dry Field Test No. Depth BEGS Location Density Density (/°) Density Compaction Compaction (in.) (ft) (pcf) (pcf) TEST-1 12 8 -- 25-ft north; 8-ft west 124.0 136.9 10.4 131.3 95 95 of SW corner of Bldg. TEST-2 12 8 — 50-ft south 20-ft west 124.1 136.6 10.0 131.3 95 95 of the NW corner TEST-3 12 6 — 30-ft south; 4-ft west 125.9 140.6 11.7 131.3 95 96 of the NW corner TEST-4 12 5 — 2-ft west; 3-ft south of 126.2 136.9 8.5 131.3 95 96 NW corner of Bldg. *R denotes a retest TEST-4� TEST-3 - ys` TEST-2 NFW WAZUA SERVICE RUILI)ING COPIES TO: Wilcox Construction File I 1 � HORIZ, 0 15 30 st] I I 5cole !n Fret Lynnwood Mazda - 1533298.500 June9, 2020 Approximate Density Test Locations: FIELD REPORT SIGNED: s« J Ted L. Sager, LG — Project Geologist Page 1 of 3 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: 0945 OFFSITE: 1210 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Friday, June 12, 2020 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff): Cloudy/Rain 51-59 PRESENT AT SITE: Golder — David Lam Wilcox Construction — Howard Snohomish County Excavating SCE SCE backfilled along the west and northwest sides of New Mazda Service Building. Up to 5 feet of stockpiled brown sandy gravel was used as backfill material. The backfill was placed in lifts and compacted using a track mounted hoe pack and large drum vibratory roller. The test results are listed below, and the approximate test and fill locations can be found on the attached map. Figure 1 Compacted fill in the north end of the western side of New Mazda Service Building, photo taken facing south. Page 2 of 2 Figure 2 Compaction of fill along the western side of New Mazda Service Building, photo taken facing southeast. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture MaximumRequired Dry° Field Test No. Depth BEGS Location Density Density (/o) Density Compaction Compaction (in.) (ft) (Pcf) (Pcf) TEST-1 12 6 About 35 feet south 125.0 132.5 6.0 131.3 95 95 from the northwest corner TEST-2 12 5 About 40 feet north of 124.7 133.0 6.7 131.3 95 95 the southwest corner TEST-3 12 3 About 60 feet south of 126.1 137.7 9.2 131.3 95 96 the northwest corner TEST-4 12 3 By northernmost corner 124.2 132.4 6.6 131.3 95 95 of wall TEST-5 10 2 About 80 feet south of 126.2 137.7 9.1 131.3 95 96 the northwest corner TEST-6 12 2 About 50 feet south of 124.3 134.2 7.9 131.3 95 95 the northwest corner *R denotes a retest Page 3 of 2 TEST-4 Tr 19 TEST- 1 TEST-6 7 TES TEST-5 TEST-2 -0 JSEWU auum COPIES TO: Wilcox Construction V fZ HOR2, 30 60 SCOI,R In Feet Lynnwood Mazda - 15332918.500 June 12, 2020 1; Approximate Density Test Locations: k:A IL-�� FIELD REPORT File SIGNED: 02A David Lam — Environmental Scientist Page 1 of 1 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: 1300 OFFSITE: 1315 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Thursday, June 18, 2020 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff ): Sun 65-70 PRESENT AT SITE: Golder — David Lam Wilcox Construction — Howard Wilcox Construction had excavated for the loading dock concrete footing subgrade located on the northwest side of the building from the intersection of site plan gridlines HA and 2, to the intersection of gridline 1 between gridlines E and F, prior to Golder's site visit. At the time of Golder's site visit, the moist, dense, sandy gravel subgrade was firm and yielded less than inch to the T- probe, and was found to be suitable for the support of the anticipated design pressures of up to 4,000 psf. See photo below. Figure 2 Excavated concrete footing subgrade for loading dock, located near the northwest corner of the New Mazda Service Building, photo taken facing southeast. NO DENSITY TESTS TODAY COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: 02& 0— David Lam — Environmental Scientist 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: 0940 OFFSITE: 1010 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Monday, June 22, 2020 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff ): Sun 62-72 PRESENT AT SITE: Golder — David Lam Wilcox Construction — Howard Snohomish County Excavating SCE SCE backfilled along the west side of New Mazda Service Building. Up to 2 feet of stockpiled brown sandy gravel was used as backfill material. The backfill soil was placed in lifts and compacted using a track mounted hoe pack. The test results are listed below. The approximate density test and fill locations can be found on the attached map. �,.._,..Wr�: Figure 1 Compacted fill placed and compacted along the west side of the New Mazda Service Building. Photo taken facing south. DENSITY TEST RESULTS Page 2 of 2 Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture maximum Dry RequiredField Test No. Depth BEGS Location Density Density M) Density Compaction Compaction (in.) (ft) (pcf) (pcf) M M fl TEST-1 12 6 North half of the fill 130.5 139.4 6.8 137.0 95 95 TEST-2 12 5 South half of the fill 132.6 142.1 7.2 137.0 95 97 *R denotes a retest y ' 3fn41rFWIM TEST-1 � � . 7o TEST-2 - _- COPIES TO: Wilcox Construction yr `` i^ Harz. Se�l� to Foe! L2'^. i Tr' I� .. • Lynnwood Mazda-1533299.500 June 22, 2020 i q+ Approximate Density Test Locations: Approximate Fill Placement Location: 0 r� f f •rTV I FIELD REPORT File SIGNED: 2 fl David Lam — Environmental Scientist Page 1 of 3 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: 0815 OFFSITE: 0930 ONSITE: 1230 OFFSITE: 1420 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Thursday, August 20, 2020 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff ): Sun/Cloud 65-74 PRESENT AT SITE: Golder — David Lam Wilcox Construction — Bill Snohomish County Excavating SCE - Trevor Golder arrived onsite and spoke with Bill F. with Wilcox. The gravity block wall subgrade located adjacent to the southwest corner of the Mazda Service Building was partially excavated at the time of Golder's initial visit. Golder informed contractor that a minimum of 2-feet below wall subgrade should be excavated and replaced with structural fill per the site plan specifications. After 12-noon, Golder returned to the site to check the excavated wall subgrade surface. SCE had over excavated the 2-feet minimum subgrade for 35-linear feet of the north -south section of wall subgrade. Golder used a '/2-inch diameter fiberglass T- probe to check the exposed subgrade surface which consisted of moist, dense, native light brown silty, fine, sand with gravel. The subgrade checked was firm and yielded less than 3-inches to the T-probe. SCE proceeded to place 2-feet of imported 5/8-inch crushed rock from Iron Mountain Quarry in Granite Falls, WA. The structural backfill material was placed in 6-inch lifts and water was added during compaction to moisture condition the crushed rock. Compaction was performed with a vibratory plate compactor. Golder collected a sample of the above mentioned 5/8-inch crushed rock for Modified Proctor analysis. The sample was transported to the Golder Soil Laboratory in Redmond, WA. At the time of the writing of this report the Modified Proctor value and optimum moisture content had been obtained (120.3 pcf at 3.7% optimum moisture content). The contactor was informed of the passing density test results from Golder by phone. The density test results are listed in the table below, followed by a map of the approximated test locations. A copy of the Modified Proctor on the 5/8-inch crushed rock is attached at the end of this report. Figure 1 Wall subgrade prior to excavation. Photo taken facing south from the southwest corner of Mazda Service Building. Page 2 of 3 10 4 S -61 i Figure 2: Over excavated wall subgrade after T-probe check, some imported 5/8-inch crushed rock placed. Photo taken facing south from the southwest corner of Mazda Service Building. Figure 3 Compaction and moisture conditioning of imported 5/8-inch crushed rock subgrade. Photo taken facing north. Page 3 of 3 DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Test No. Probe Depth (in.) Depth BEGS (ft) Location Dry Density (Pcf) Wet Density (Pcf) Moisture maximum Dry Density RequiredField Compaction Compaction TEST-1 10 0 North section of wall 119.2 123.7 3.8 120.3 95 99 backfill, near SW corner of Mazda Service Building, wall will retain paved parking surface to the west TEST-2 12 0 South section of wall 121.7 126.6 4.1 120.3 95 101 backfill, near SW corner of Mazda Service Building, wall will retain paved parking surface to the west "R denotes a retest K 96t upE n �sab � seek um XWZ, ,pia-z . .. � TEST- } ' ••r • � r Cir14�1[ 94{�I" WAIMPE AI LL SEE 9 1 ,r t-.zz-2 LNMUK ON-M ,P1 MR -ER 1 COPIES TO: Wilcox Construction File {� flh,FJRSk CQFI[RM %UKA1 aim St� 0I+1 M-521, CO ShM C24-0-3 I � I � 1U CET ExTIgLSIEA CLIM SEE Wkil. W-Sz� CN SIIETI CZ20-7 41L SICRUE MURIM {SEE ARD1L I � 01 � 1 4 Wt+ Ul SMIN r • $ACxC�r S7�PP�1G 1�111 CA"Rm 0100" OLFAn 9CLOSV {OEM er DTMM *W.r 0 VW" C THU C0400L SL9 op SE KTW 2, MR I-z FIELD REPORT SIGNED: David Lam — Environmental Scientist 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: 0940 OFFSITE: 1015 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, August 25, 2020 �1533298 PROJECT: Lynnwood Mazda Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff ): Sun 73 PRESENT AT SITE: Golder — David Lam Wilcox Construction — Bill Snohomish County Excavating SCE - Trevor Golder arrived onsite and noted the construction progress of the ecology block wall located at the southwest corner of the Mazda Service Building. The contractor had installed the 1-foot minimum width drain gravel behind wall using imported 1.5-inch clean screened, crushed rock from Iron Mountain Quarry in Granite Falls, WA. A 4-inch diameter perforated PVC drainpipe was installed and bedded in the imported screened rock. MIRAFI 140N filter fabric was installed between the drain rock and structural fill. Figure 1: Ecology block wall installation. Photo taken facing south from SW corner of Mazda Service Building. Figure 2: Ecology block wall installation with drainpipe at the southeastern part of wall. Photo taken facing west. Page 2 of 2 Figure 3: Ecology block wall installation, 4-inch diameter perforated PVC drainpipe installed behind wall blocks, MIRIFI 140N filter fabric installed behind wall blocks. Photo taken yesterday, August 23, 2020 (provided by SCE) facing south. NO DENSITY TESTS TODAY COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: Oak David Lam — Environmental Scientist ATTACHMENT 1 B Hyundai Showroom Improvements 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1310 OFFSITE: 1425 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: May 27, 2020 1533298.500 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff): Clear -65 PRESENT AT SITE: Golder - Ted Sager Wilcox Construction - John Ortiz Grade Inc. Upon Golder's arrival on site the contractor had placed about 2-feet of soil backfill for the interior floor slab -on -grade subgrade for the new Sales Addition located adjacent to the east side of the existing building. The contractor had used onsite material placed in lifts and compacted with a jumping jack and a mini CAT skid steer loader with an attached vibratory roller. Golder performed 4 surface nuclear density tests on the slab -on -grade fill subgrade that indicated compaction to site specifications had been achieved. The test results are listed below, with the approximate test locations on the following map. Figure 1: Prepared slab -on grade subgrade for the new Sales Addition looking south. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. Page 2 of 2 The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture MaximumRequired Dry Field Test No. Depth BEGS Location Density Density (/°) Density Compaction Compaction (in.) (ft) (pcf) (pcf) TEST-1 12 6 -- 25-ft north; 8-ft west 133.7 140.9 5.3 137.0 95 98 of SW corner of Bldg. TEST-2 12 5 — 50-ft south 20-ft west 133.2 139.4 4.6 137.0 95 97 of the NW corner TEST-3 12 3 — 30-ft south; 4-ft west 130.5 137.3 6.8 137.0 95 95 of the NW corner TEST-4 12 3 — 2-ft west; 3-ft south of 134.5 141.6 5.2 137.0 95 98 NW corner of Bldg. *R denotes a retest TEST-1 4 ' TESTA t> aQ N a 0 TEST-2 z } x O za O �a Zoo J W � TEST-3 o 0 o Nw Lynnwood Hyundai - 1533298.500 May 27, 2020 Slab on Grade Backflll z _ Approximate Density Test Locations: FLb IIN�d FO�NpATION ALA. ! A 1 ' -V••v F.. 401 •:®w..e.vm.n.n aw.�.....e.,,......r..Y w.w... COPIES TO: Wilcox Construction File S101.4 FIELD REPORT SIGNED: Ted L. Sager, LG — Project Geologist Page 1 of 3 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1050 OFFSITE: 1140 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Monday, June 8, 2020 �1533298 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff): Overcast 55 PRESENT AT SITE: Golder — David Lam Wilcox Construction — John Ortiz The contractor previously excavated and prepared interior isolated concrete footing subgrades and slab -on -grade concrete subgrade. See attached map for excavated and checked footings. Golder used a'/2 inch diameter fiberglass T-probe to check interior isolated concrete footing subgrades. The subgrades consisted of native moist, dense, grey -brown sandy gravel. At the time of Golder's visit, the subgrades checked were firm and yielded less than 2 inches to the T-probe and were found to be suitable for the support of the anticipated design pressure of 4,000 psf. The contractor previously backfilled the slab -on -grade subgrade between gridlnes 6 and 7 using the native moist grey brown sandy gravel. Density tests were taken on the slab -on -grade subgrade. See density test results and approximate testing location map below. 1 y T.. Figure 1 Isolated footing subgrade located near the center between gridlines 4 and 5 and between gridlines B and C, second isolated footing from the west (Typical). Page 2 of 3 Figure 2 Slab -on -grade subgrade between gridlines 6 and 7, photo taken looking west. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture maximum Dry RequiredField Test No. Depth BEGS Location Density Density (/o) Density Compaction Compaction (in.) (ft) (pcf) (pcf) M M) TEST-1 12 1 West side of slab on 130.7 138.4 5.9 137.0 95 95 rade subgrade TEST-2 12 1 East side of slab on 130.6 139.4 6.8 137.0 95 95 grade subgrade *R denotes a retest Page 3 of 3 x. 74-7 ❑ �❑ -� ,.�: III ri I TEST-1 TEST-2 LIMi _- L' YW��7fi f fdeRlDAii4H PU4N COPIES TO: Wilcox Construction File Lynnwood Hyundai-1533299.500 tune S, 2020 Footing Check Approximate Density Test Locations: Interior Isolated Footings 5ubgrade Check Locations: ❑ .•wo-aaweanaie w _ 71 F FIELD REPORT SIGNED: 021—T David Lam — Environmental Scientist Page 1 of 1 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 0945 OFFSITE: 0950 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Friday, June 12, 2020 �1533298 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff): Overcast/Rain 51-59 PRESENT AT SITE: Golder — David Lam Wilcox Construction — John Ortiz The contractor previously excavated and prepared interior isolated concrete footing subgrade at the intersection of gridlines B and 4. Golder used a'/2 inch diameter fiberglass T-probe to check interior isolated concrete footing subgrade which consisted of native moist, dense, grey -brown sandy gravel. At the time of Golder's visit, the subgrade checked were firm and yielded less than 1 inch to the T-probe and was found to be suitable for the support of the anticipated design pressure of 4,000 psf. I—qM Figure 1 Interior isolated footing subgrade at the crossing of gridlines B and 4, photo taken looking down and facing west. NO DENSITY TESTS TODAY COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: 024 David Lam — Environmental Scientist 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1315 OFFSITE: 1345 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Thursday, June 18, 2020 �1533298 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff ): Sun 65-70 PRESENT AT SITE: Golder — David Lam Wilcox Construction — John Ortiz The contractor previously excavated and prepared concrete seat wall and concrete planter wall subgrades for new streetscape improvements for HWY 99 in 3 locations: on the east side of parking spaces 12 and 13, on the east side of parking spaces 17 and 18, and in the northeast corner of the jobsite. Golder used a'/2 inch diameter fiberglass T-probe to check subgrade compaction. At the time of Golder's site visit, the moist, dense, gravelly sand was firm and yielding less than 3 inches to the T-probe, and were found to be suitable for the concrete pour. Figure 1 Concrete seat wall/planter wall subgrade on the east side of parking spaces 12 and 13, photo taken looking down and facing north. Page 2 of 2 Figure 2 Concrete seat wall/planter wall subgrade on the east side of parking spaces 17 and 18, photo taken looking down and facing north. Figure 3 Concrete seat wall/planter wall subgrade in the northeastern part of jobsite, photo taken looking down and facing south. NO DENSITY TEST RESULTS COPIES TO: Wilcox Construction File FIELD REPORT SIGNED: David Lam — Environmental Scientist 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1300 OFFSITE: 1620 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Tuesday, August 11, 2020 �1533298 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff ): Sun 68 PRESENT AT SITE: Golder — David Lam Grade Inc. — Craig, Eli Wilcox Construction — John Ortiz The contractor excavated for the watermain connection from the double check detector valve assembly to the proposed fire service 3 way valve located in the right southbound lane of SR 99, using a vactor truck. No piping was installed today. At the end of the day, the contractor backfilled the approximately 3 foot deep trench with imported 5/8-inch crushed rock. No compaction was performed at the time of Golder's visit as the backfill was for temporary safety purposes. The contractor will place steel plate over cut road section. Golder collected a sample of imported 5/8-inch crushed rock supplied from Cadman in Monroe, WA for Modified Proctor analysis to be perfomed at the Golder Soil Laboratory in Redmond, WA. . 1 Figure 1 Backfill of open trench in SR 99 using imported 5/8-inch crushed rock, photo taken facing east. Page 2 of 2 Figure 2: Stockpile of imported 5/8-inch crushed rock, sourced from Cadman, in Monroe, WA. NO DENSITY TESTS COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: David Lam — Environmental Scientist Page 1 of 3 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 Hyundai 22130 Highway 99 Edmonds, WA 98026 ONSITE: 1100 OFFSITE: 1800 SITE ACTIVITES THE FOLLOWING WAS NOTED: DATE: JOB NO: Thursday, August 13, 2020 �1533298 PROJECT: Lynnwood Hyundai Dealer LOCATION: Edmonds, WA CONTRACTOR: OWNER: Wilcox Construction Doug Ike ami WEATHER: TEMP ff ): Sun 71 PRESENT AT SITE: Golder — David Lam Grade Inc. — Craig, Eli Wilcox Construction — John Ortiz At the request of the sub -contractor, Golder arrived onsite at 1100 to observed backfill of the waterline connection on SR 99. The contractorhad excavated from double check detector valve assembly to the proposed fire service 3 way valve in SR 99 using a vacuum truck. Six-inch diameter ductile iron piping was installed. Once the connection was completed the approximately 3-foot deep trench was backfilled, in lifts, using the imported 5/8 inch crushed rock. Compaction was achieved using a jumping jack. Density testing in the crushed rock backfill was performed. The test results are listed below, and the approximate test locations can be found on the attached map. Figure 1: Excavated water connection trench in SR 99, vacuum truck on the left, photo taken facing east. Page 2 of 3 Figure 2: Backfill with imported 5/8-inch crushed rock, compaction achieved with a jumping jack, photo taken facing south. DENSITY TEST RESULTS Density testing was performed using a Troxler 3440 nuclear densometer. (Note: All references to test depths are from existing nearby grades, below existing ground surface [BEGS].) Density test locations are shown on the attached plans. The following nuclear moisture/density data was obtained today: Probe Depth Dry Wet Moisture MaximumRequired Dry Field Test No. Depth BEGS Location Density Density (/o) Density Compaction Compaction (in.) (ft) (pcf) (pcf) TEST-1 10 2 North of the 3-way tee 121.0 128.6 6.3 125.6 95 96 TEST-2 10 1.5 Under sidewalk 121.2 127.5 5.2 125.6 95 97 TEST-3 12 0.5 South of the 3-way tee 1 119.5 125.9 5.4 125.6 95 95 *R denotes a retest Page 3 of 3 STD DE[NL WA- -a' a (w7 TEST-2 OR Y� w{ TMM5T ` TEST-1 � r TER sflk rtCE ti �; i r� a TEST-3 �f ' fiE 5�1 TD p 3 �1 e ­w� V —::] �, I Or/ l k IN F Cy nX l PER STD TFUL 4 B AND oik-IZ14 OR r C5.01-3 rr 5€f 1TY UUr FOR .5 Lynnwood Hyundai - Z 533298.5aa August 13, 2020 Fi.e Serwiee Tie 'n t f Approximate Density Tes=_ LaEations: COPIES TO: Wilcox Construction FIELD REPORT File SIGNED: 0 fl L (David Lam — Environmental Scientist ATTACHMENT 2 Laboratory Testing 1/14/19 1533298.500 PARTICLE SIZE DISTRIBUTION ASTM C136 and C117-17 PROJECT NAME: Dougs/Lynnwood Mazda In111/WA SAMPLE ID: 1/8/2019 TYPE: GRAB Coarse Fine Coarse Medium Fine Silt or Clay GRAVEL SAND FINES COBBLES Particle Size Particle Size (mm) % Passing Classification Percentage Moisture Content 5.21 z a; N b b n v; Fines 7.9 D60= 2.13 D30= 1.07 D10= 0.15 Cu = D60/D 10 = 13.8 > 6 Cc = D30^2/(D10*D60) = 3.5 > 3 DESCRIPTION: gravelly SAND some fines TECH RBK USCS: SP DATE 1/14/18 CHECK MLP REVIEW MLP 12" 3" 2" 1" 3/4" 3/8" #4 #10 #20 #40 #60 #100 #200 100 90 80 70 P 60 a s 50 s i n 40 g 30 20 10 0 1000 100 10 1 0.1 0.01 0.001 Particle size in millimeters 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 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 #200 0.075 7.9 Golder Associates Inc. Golder Associates Inc. 12/13/18 1533298.500 PARTICLE SIZE DISTRIBUTION ASTM C136 and C117-17 PROJECT NAME: Dougs/Lynnwood Mazda Infil/WA SAMPLE ID: 12/11/2018 TYPE: GRAB 7\' Coarse Fine Coarse Medium Fine Silt or Clay GRAVEL SAND FINES COBBLES Particle Size Particle Size (mm) % Passing Classification Percentage Moisture Content 11.12 z a; N b b v; Fines 17.9 D60= 1.94 D30= 0.26 D10= #N/A Cu = D60/D 10 = #N/A #N/A Cc = D30A2/(D10*D60) _ #N/A #N/A DESCRIPTION: gravelly SILTY SAND TECH RBK USCS: SM DATE 12/13/18 CHECK MLP REVIEW MLP 12" 3" 2" 1" 3/4" 3/8" #4 #10 #20 #40 #60 #100 #200 100 90 80 70 P 60 a s 50 s i n 40 g 30 20 10 0 1000 100 10 1 0.1 0.01 0.001 Particle size in millimeters 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 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 Golder Associates Inc. Golder Associates Inc. Golder Associates Inc. 1533298 PARTICLE SIZE DISTRIBUTION ASTM C136 and C117-17 PROJECT NAME: Dougs/Lynnwood Mazda Infil/WA G O L D E R SAMPLE ID: 01/08/2020 - Lam Depth - TYPE: GRAB 12" 3" 2" 1" 3/4" 3/8" #4 #10 #20 #40 #60 #100 #200 100 90 T� I 80 % 70 P 60 a s 50 S i 40 n 1; 30 20 10 0 1000 100 10 1 0.1 0.01 0.001 Particle size in millimeters Coarse Fine Coarse Medium Fine Silt or Clay COBBLES GRAVEL SAND FINES Particle Size Particle Size (mm) % Passing Classification Percentage 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 14.4 2.0" 50 100.0 1.5" 37.5 1 100.0 1.0" 25 89.7 0.75" 19 85.6 0.375" 9.5 70.5 Fine Gravel 26.7 #4 4.75 58.8 #10 2.00 48.8 Coarse Sand 10.1 #20 0.85 1 38.7 Medium Sand 21.1 #40 0.43 27.6 #60 0.25 19.0 Fine Sand 17.3 #100 0.15 14.2 #200 0.075 10.4 Fines 1 10.4 D60= 5.09 1 D30= 0.49 D1o= Cu = D60/D l0 = Cc = D30^2/(D10*D60) _ DESCRIPTION: SAND and GRAVEL some fines USCS: SP - GP Moisture Content 8.30 DA RBK 1/12/20 TLS MI.P Golder Associates Inc. Golder Associates Inc. Go/der Associates inc.