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Project: AASF Washrack Boring Investigation Boring: MW-4(SB:M Pg. 1 of 2 <br /> Drilling Co: Precision Sampling Drilling Method: Hollow-Stem Auger Date Started: 3/28/11 <br /> Location: 2000 Stimson Rd,Stockton,CA Sampler/Drop: Split Spoon/30" Date Completed: 3/28/11 <br /> Logged by: DBS Reviewed by: <br /> Surface Elev.: Water Depths: 4 ATD 40 i At Completion 33.1 @ 24 hrs AD 30.5 <br /> r <br /> ESTIMATED w <br /> LL 12"Flush Mount UJ p w = LL o %OF <br /> F Traffic Rated Vault � w a s H rn m7SA <br /> � <br /> w Box and Locking Well j Q <0 W 0 2O <br /> p Cap z o a cn O DESCRIPTION con G <br /> Fat Clay(CH);very dark grayish brown(10YR <br /> 3/2),moist,soft to fine;sand with depth. No <br /> hydrocarbon odor or staining. <br /> 5 60 gallons grout(10- 9 78 0.1 — —— —— —— — 5 CL <br /> 47 Ib.bags) Lean Clay with Silt(CL);olive brown(2.5Y 4/3), <br /> slightly moist to moist,fine to stiff. No <br /> hydrocarbon odor or staining. <br /> 10 17 100 479 — — — —— 10 CH <br /> Fat Clay(CH);ery dark grayish brown(10YR <br /> 3/2),moist,stiff to very stiff. <br /> At 10.7 ft:Hydrocarbon staining and strong odor <br /> noted. Becomes dark olive gray(5Y 3/2). <br /> 15 40 89 109 Poorly Graded Sand(SP);dark olive gray(5Y 15 SP <br /> 3/2),very moist,dense.Hydrocarbon odor and <br /> staining. <br /> Riser Casing:4"Sch. <br /> 40 PVC <br /> N <br /> 20 17 100 64.8 — — 20 SW <br /> Well Graded Sand(SW);very dark gray(5Y 3/1), <br /> N very moist to wet,medium dense;fine to coarse <br /> z sand with some very coarse sand. Hydrocarbon / <br /> 3 Fodor and staining.———————————J <br /> w Fat Clay(CH);very dark gray(5Y 3/1),slightly <br /> moist,hard;high toughness. Strong hydrocarbon <br /> 0 odor and staining. <br /> CL <br /> z 25 27 100 511 Silty Poorly Graded Sand(SP-SM);olive(5Y 25 SP <br /> 0 4/3),slightly moist to moist,medium dense;fine <br /> 2.5 buckets(5 gallon) to medium sand with abundant silt(up to 40%) <br /> x Hydrated 1/4"Time <br /> Release Bentonite and some clay,tight. Hydrocarbon odor and <br /> Pellets staining. <br /> z <br /> 0 <br /> 0 30 ——————————————————— 30 <br /> a3 (continued) <br /> Lithologic Log and Well Construction Details of MW-4(SB-01) <br /> Z <br /> Z OTIE <br /> For <br /> � CA ARNG <br /> w rises ted Enter Oneida Total Inte ra <br /> 9 P Project Location Project No. Fig. <br /> o = <br /> [ AASF Stockton 2000 Stimson Rd. 2009069 31a <br /> J <br />