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Project: ARCO Station # 2186 Log of Monitoring Well: <br /> Location 3212 N Cahforma Street,Stockton,CA Protect Number 38466463 1[;H-4/MW-8 <br /> Dates Dnlled 4/16104 Total Depth 135 feet Borehole Name BH-4 <br /> D1 ng Contractor Gregg Dnllmg Well Construction Date Logged By Jeff Brooks <br /> le Diameter 8-inLh Casing Diameter 2-inch Casing Type SCH 40 PVC Checked By Vernon Elarth RG <br /> Drilling Method Hollow Stem Auger Screen Interval Slot Size Sampling Method Split spoon <br /> Comments East-Northeast of UST pit Log of BH 3 used for 0 to 108 <br /> U $ S <br /> w u & 3 ¢ <br /> o a <br /> LITHOLOGY DESCRIPTION WELL CONSTRUCTION <br /> 0 Asphalt and roadbase Flush mount traffic graded 0 <br /> vault box <br /> Sandy Silt(ML) Dark Grayish brown 35%fine to medium <br /> grained sand 65%silt stiff moist Well secured with locking <br /> pressure cap <br /> Cleared with air knife to 5 feet depth <br /> 5 Sandy silt with Clay(ML) Yellowish brown 30%very fine to 5 <br /> 25 06 fine grained sand 15%clay very stiff moist <br /> Near surface to 120 Neat <br /> Cement <br /> 65 08 As above except trace clay hard <br /> 10 10 <br /> 2 inch SCH 40 PVC cdsmg to <br /> 129 <br /> 26 0 0 <br /> 15 As above except with 45%very fine to fine grained sand trace 15 <br /> c thche very stiff <br /> 37 D o <br /> 20 Sandy Silt with Clay(ML) Light olive brawn 30`fa veryfine to 20 <br /> fine grained sand trace clay hard moist <br /> 46 0 8 <br /> 25As above except dark yellowish brown trace manganese oxide 25 <br /> staining <br /> Sand(SP) Dark grayish brown very fine to medium grained <br /> sand trace silt medium dense moist <br /> 25 03 30 30 <br /> Static water level prior to development on 513104 <br /> 33 04 38 As above except trace subrounded coarse sand dense 35 <br /> Sandy Silt with Clay(ML) Light olive brown 15%very fine to <br /> fine grained sand 15%clay verystiff moist <br /> 22 04 <br /> 46 40 <br /> 2870 Gateway Oaks or Sie 300 <br /> SALrmnento CA 95833 <br /> UM9166792000 <br />