Laserfiche WebLink
Project: AASF Washrack Boring Investigation Boring: MWA(SB:M Pg. 2 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: V ATD 40 t At Completion 33.1 Y @ 24 hrs AD 30.5 <br /> ESTIMATED <br /> Ld <br /> LL > (0U_ LL %OF <br /> 2 = S 0 <br /> a a <br /> ~ X 0 2 aO d COU2 <br /> U.1 (CONTINUED) z o a can 0� Lu. DESCRIPTION w (1) GAJSAFl <br /> Well Graded Sand(SW);dark olive brown(5Y <br /> 3/2),wet/saturated,dense;fine to very coarse <br /> : sand with some fines(t 5%),perched water. <br /> Hydrocarbon odor and staining. <br /> Groundwater measured at-30.5 ft bgs(14:00 <br /> 3/29/2011). <br /> Groundwater measured at 33.1 ft bgs(10:55 <br /> 3/28/2011). <br /> 35 9 bags(900 lbs.) 27 100 298 ——— —— 35 SC <br /> #2/12 Sand Filter Clayey Sand(SC);dark olive gray(5Y 3/2), <br /> Pack moist,medium dense;fine to medium sand with <br /> some coarse sand,abundant day with silt. <br /> Hydrocarbon odor and staining. <br /> 40 29 83 478 Groundwater encountered at-40 ft bgs(10:50 40 SW <br /> 3/28/2011). <br /> 62 100 Well Graded Sand(SW);very dark gray(2.5Y SP <br /> 3/1),saturated,medium dense;fine to coarse <br /> sand with trace very coarse sand. Hydrocarbon / <br /> 22 100 \odor and staining. ————————___j <br /> Poorly Graded Sand(SP);very dark gray(2.5Y <br /> 3/1),saturated,dense;medium to coarse sand <br /> with trace fines(t 5%). Hydrocarbon odor and <br /> 45 Screen Interval: 11 100 possible staining. ———— — _ 45 SW <br /> 30-50'bgs(4"Sch. Grades to Well Graded Sand(SW);very dark <br /> 40 PVC 0.010 slot) grayish brown(10YR 3/2),saturated,loose;fine <br /> 32 100 to very coarse sand. Slight hydrocarbon odor,no <br /> staining observed. <br /> becomes dark yellowish brown(10YR 4/4),some <br /> 23 100 clay in matrix(-10%). <br /> N <br /> a 50 <br /> F 50 <br /> 0 <br /> o Total Depth=50 feet bgs <br /> N <br /> z Groundwater encountered at 30 ft(perched)and <br /> z 40 it bgs <br /> w Groundwater measured at-30.5 ft(14:00 <br /> a 3/29/2011) <br /> 0 <br /> J Well Construction: <br /> a 12"dia.Traffic Rated Vault Box <br /> N Portland Cement Grout=470 lbs(10 bags) <br /> z making 60 gallons <br /> W Transition Seal: Hydrated 1/4"Time Release <br /> °m Bentonite Pellets=2.5 five-gallon buckets <br /> Filter Pack: #2/12 Cemex Sand=900 lbs(9 <br /> bags)-surged-30 minutes <br /> V) <br /> a <br /> 3 <br /> z <br /> 0 <br /> Y <br /> U <br /> O <br /> r <br /> LL <br /> V� Lithologic Log and Well Construction Details of MW-4(SB-01) <br /> For <br /> z 5� OTIEZCA ARNG <br /> 11 Oneida Total Integrated Enterprises <br /> a �, 9Project Location Project No. Fig. <br /> C9 ' AASF Stockton 2000 Stimson Rd. 2009069 31b <br />