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Project: ARCO Station # 2186 Log of Monitoring Well: Location 3212 N California Street,Stockton,CA Project Number 38466463 BH-4IMW-8 E rN R 2 Ga LITHOLOGY DESCRIPTION WELL CONSTRUCTION 26 29 45 Clayey Silt with Sand(ML) Olive gray 30%clay 20%very fine 45 to fine grained sand iron oxide staining over 25%of sample very stiff moist First water during drilling 19 68 50 Sandy Silt with Clay(ML) Olive brown 35%very fine to fine 50 grained sand trace clay very stiff saturated 55 22 89 Silty Sand(SM) Olive brown very fine grained sand 35%silt 55 trace clay medium dense saturated As above except 50%very fine to fine-grained sand 30`&silt 31 05 20%clay 60 Clayey Silt with Sand(ML) Olive brown 20%clay 15%very 60 fine to fine grained sand hard wet ao 08 65 Sandy Silt with Clay(ML) Light olive brown 30%very fine to 6rJ fine grained sand 15%clay hard moist 7D 27 04 Silty Sand(SM) Light olive brown 30%silt 60%very fine to 70 fine grained sand trace coarse grained sand medium dense wet Sand(SP) Olive brown very fine to medium grained sand trace silt loose saturated 75 10 75 115 Silty Sand(SM) Olive brown 75%very fine to medium grained 16 sand 25%silt trace coarse grained sand medium dense 80 21 saturated SD 09 24 Sand(SP) Olive brown very fine to medium grained sand trace silt medium dense saturated 18 85 28 Silty Sand(SM) Olive brown 75%very fine to medium grained 85 sand 25%silt trace coarse grained sand medium dense 13 saturated la 28 Sand(SP) Olive brown fine to medium grained sand trace coarse grained sand trace silt medium dense saturated 9D 10 90 28 Sandy Clay with Silt(CL) Olive brown 30%very fine to fine 46 grained sand 15%silt low plasticity clay very stiff moist UM2870 Gateway Ciakc Dr Ste 300 Sacramento CA 95833 91667920DO