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Boring Numbers CB-4 <br /> Job Number 149411 HORIZON ENVIRONMENTAL INC <br /> Site Location Beacon #494, Stockton, CA <br /> Drilling Company Mitchell Drilling Environmental Drilling Method Ir Hallow Stem Auger <br /> Drilled By Bart Sampling Method Split—Spoon Sampler <br /> Date Drilled 06/12/95 Total Depth 55-1/2 Feet <br /> Logged By G Barker Depth To Groundwater <br /> v � � <br /> s m 7 c o c o <br /> m i� q a Soil te a r_ Well <br /> o C Q <br /> 1,: V a N_ Description y E Construction Comments <br /> E m L o a <br /> N <br /> 25 18 is 0 SILT, with some very fine—grained sand. <br /> 31 30 31 no plasticity, very hard, dry ML <br /> U <br /> 32 32- <br /> 33— 33- <br /> 34— 34 <br /> 35 50+ <br /> 36 18 18 0 35 SILT, some clay, true& dark gray gravel, <br /> medium plasticity, very hard, dry <br /> 3fi 36 <br /> 37 37- <br /> 38— 38- <br /> 39— 39 <br /> 4o 215 30 16 i8 0 40 CLAYEY SILT, brown wlth reddish mottling, <br /> 31 medium plosticdy, very hard, dry <br /> 41 41 <br /> 42 42 <br /> 43 43- <br /> 44- <br /> 45— <br /> 344 45 27 <br /> 30 18 18 0 45 trace fine gravel <br /> 46 <br /> v 32 <br /> 6 <br /> 4 <br /> 47 47 <br /> 48 48 <br /> 49 49 <br /> 30 <br /> 50 50+ 18 18 0 50 SILT, with some very fine—grained sand, <br /> brown, low plasticity, very hard, dry sM <br /> 51 51 <br /> 52 52- <br /> 53— 63- <br /> 54— 54 <br /> 55 LO 21 55 increasing sand, dark brown with reddish <br /> 50+ 16 18 0 <br /> mottling, very hard, dry <br /> 5656 Total depth 55-1/2 feet bgs <br /> 57 57- <br /> 58- <br /> 758SB <br /> 59 59 <br /> so 60 <br /> Page 2 Of 2 <br />