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SECOR <br /> Internatzonal lnc2Tporated <br /> Logged By Date Drilled Drilling Contractor Project Name Method/Equipment Well Number <br /> ARCO Station#4932 HSA-Spirt Spoon <br /> D Harp 8121100 West Hazmat �16E Harding Way,Stockton,CA CME-75 MW-4 <br /> See"Soil Clasification Chart" Boring Surface Groundwater Depth(ft) Total Drive Drop <br /> for Soil Classifications and Diam(in) Elev(ft SZ 28 First Water Depth(ft) wt(lbs) Dist(in) <br /> Designations 10 415 140 30 <br /> tu <br /> :o Q Z <br /> Well _;F� 1~ <br /> a Description p g <br /> Construction A a <br /> rA <br /> CasinR Elev 40 <br /> well box o ASPHALT,GRAVEL,and SANDS(AB)(0 to 3 5) <br /> ' cement 0 <br /> 0 <br /> 6 A 0 <br /> bentonite U <br /> seal 0 <br /> ' 4"blank SILTY CLAY(CL) Brown(10YR 4/3), medium plasticity, firm, <br /> casing moist,no hydrocarbon odor (10,20,70) <br /> 4"slotted 5 10 CLAYEY SILT(ML) Dark Yellowish Brown(10YR 414),minor 0 MW-4 <br /> 0 020 casing 13 sands,low plasticity,very stiff,moist,no hydrocarbon odor (20,50,30) @5 <br /> 15 <br /> 1 <br /> 10 15 SILTY SAND(SM) Dark Yellowish Brown(10YR 4/6),very fine 50 MW-4 <br /> ' 15 grained sands,poorly graded,soil is slightly mottled with white-gray @10 <br /> 20 staining,non plastic,dense,moist,slight hydrocarbon odor (40,30,30) <br /> Minor hydrocarbon odor noticed at approximately 12'bgs <br /> ' PID reading from cutting=4 ppm <br /> ' 15 25 CLAYEY SILT(ML) Dark Brown(IOYR 313),no staining,low 732 MW-4 <br /> 25 plasticity,hard,moist,hydrocarbon odor (20,45,35) @15 <br /> 32 <br /> 1 <br /> ' 20 16 SILTY SAND(SM) Dark Olive Gray(5YR 312), fine grained, 763 MW-4 <br /> 20 poorly graded,dense,very moist,slight hydrocarbon odor (40,35,25) @20 <br /> 28 <br /> ' The substrata descriptions above are generalized representations and based upon visual/manual classification of cuttings and/or <br /> samples obtained during drilling Predominant material types shown on the log may contain different materials and the change from <br /> one predominant material type to another could be different than indicated Descriptions on this log apply only at the specific location <br /> at the time of drilling and may not be representative of subsurface conditions at other locations or times <br /> Project No 077 41983 330 Date 10/19/00 Log of Well <br /> 4932 GPJ Figure <br /> LOG OF BOREHOLE <br /> (sheet 1 of 2) <br />