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Project: _AASF Washrack Boring Investigation Boring: MW-6(SB-03) Pg. 2 of 2 <br /> Drilling Co: Precision Sampling Drilling Method: Hollow-Stem Auger Date Started: 3/30/11 <br /> Location: 2000 Stimson Rd,Stockton,CA Sampler/Drop: Split Spoon/30" Date Completed: 3/30/11 <br /> Logged by: DBS Reviewed by: <br /> Surface Elev.: Water Depths: Q ATD 35 t At Completion 33 <br /> aSTIMATE <br /> LL W U %OF uJ <br /> W b Lu J <br /> J 2 = O <br /> J a a <br /> a w I- u�COm <br /> � QCT a U� <br /> (CONTINUED) z o a (n (7 OJ DESCRIPTION w Z)v})7SA 2 <br /> Sandy Fat Clay(CH);strong brown(7.5YR 5/6), <br /> slightly moist,hard;clay with fine sand and some <br /> silt. No hydrocarbon odor or staining. <br /> 10.5 bags(1050 lbs.) <br /> 21 #2/12 Sand Filter <br /> Pack Groundwater measured at-33 ft bgs(09:45 <br /> 3/30/2011) <br /> Groundwater measured at-33.5 ft bgs(09:30 <br /> 35S2:. 3/30/2011) 35 <br /> 42 100 0.0 Poorly Graded Sand with Clay(SP);dark SP <br /> yellowish brown(10YR 3/6),saturated,dense; <br /> medium sand with clay(clay content increases <br /> with depth),occasional lamination of coarse <br /> sand. No hydrocarbon odor or staining. <br /> Groundwater encountered at-35 ft bgs(09:11 <br /> 3/30/2011). <br /> 40 _ __ _ 40 <br /> 34 100 0.0 Well Graded Sand(SW);dark yellowish brown SW <br /> (1 OYR 3/4),saturated,medium dense. No <br /> 2572 \hydrocarbon odor or staining. _ _J CH <br /> Screen Interval: Fat Clay(CH);brown(10YR 4%3),moist,hard. <br /> 28-48'bgs(4"Sch. No hydrocarbon odor or staining. <br /> 40 PVC 0.010 slot) 34 100 Well Graded Sand(SW);dark yellowish brown SW <br /> (10YR 3/6),saturated,medium dense. No <br /> \hydrocarbon odor or staining.------------ <br /> Sandy <br /> ______Sandy Fat Clay(CH);light yellowish brown <br /> 45 26 78 (10YR 6/3),slightly moist to moist,hard;clay with 45 SP <br /> medium to coarse sand(±30-40%). No / <br /> \hydrocarbon odor or staining. J <br /> Poorly Graded Sand(SP);light olive brown(2.5Y <br /> 4/3),saturated,medium dense;fine to medium <br /> sand,tight. No hydrocarbon odor or staining. <br /> Total Depth=48 feet bgs <br /> Groundwater encountered at-35 ft bgs(09:11 <br /> 3/30/2011) <br /> o Groundwater measured at-33 ft(09:45 <br /> 3/30/2011) <br /> N <br /> z Well Construction: <br /> 12"dia.Traffic Rated Vault Box <br /> a Portland Cement Grout=564 lbs(12 bags) <br /> o making 80 gallons <br /> Transition Seal: Hydrated 1/4"Time Release <br /> a Bentonite Pellets=2.25 five-gallon buckets <br /> Filter Pack: #2/12 Cemex Sand=1050 lbs <br /> z (10.5 bags)-surged-15 minutes <br /> 0 <br /> m <br /> U <br /> U) <br /> Z <br /> O <br /> F <br /> Y <br /> U <br /> O <br /> N <br /> Lithologic Log and Well Construction Details of MW-6(SB-03) <br /> z �� <br /> TIE For <br /> � CA ARNG <br /> wOneida Total Integrated Enterprises a ; r- 9 P Project Location Project No. Fig. <br /> a H= AASF Stockton 2000 Stimson Rd. 2009069 33b <br />