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Boring Number, CB-4 <br /> Job Number 149411 HORIZON ENVIRONMENTAL INC. <br /> Site Location Beacon #494, Stockton, CA <br /> • Drilling Company Mitchell Drilling Environmental Drilling Method T Hollow 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 /> Q <br /> C G <br /> o D o <br /> .0 @ j C o c C p -r+ V O <br /> p-i� Z U am n Soil 0 ac Well <br /> m o Comments <br /> n 5 a o o, S v c Description v, Q m Construction <br /> E m °c r M V) oma $ <br /> (°n a U eY <br /> Asphalt8 inches underlain by 0 inches <br /> 1 1 of grave bassroc <br /> 2 2- <br /> 3— 3- <br /> 4— 4 <br /> 5 15 5 CLAY, with some silt, dark brown to block. CL <br /> 6 <br /> 18 1B 12 0 medium plasticity, hard, dry <br /> g <br /> 7 7— <br /> a-- <br /> 9 89 <br /> � i0 <br /> 10 12 1$ 18 0 10 SANDY SILT, vey fine—grained, brown, high <br /> AIH <br /> 11 <br /> 13 plasticity, very stiff, dry <br /> V 11 <br /> 12 12 <br /> 13 13 <br /> 14 14 <br /> 11 <br /> 15 12 18 18 0 15 increasing silt. <br /> 16-7V 18 <br /> 17 17 <br /> 18 18 <br /> Is- <br /> 20 <br /> 9 20 ri 20 24 18 18 0 20 CLAYEY SILT, brown, low plasticity, <br /> o� 25 hard. dry ML <br /> 21 21 <br /> 22 22 <br /> 23 23 <br /> 24 24 <br /> 25 N 25 35 <br /> 28 18 18 0 SILTY SAND, very fine—grained, brown SM <br /> 26 30 26with reddish brown layering, hard, dry <br /> L 9 <br /> U <br /> 27 27- <br /> 28- <br /> 72$ 28 <br /> . 29 29 SILT, with some wry fine—grained sand. ML <br /> 30 <br /> no plasticity, very hard, dry <br /> 3D <br /> (Boring Continued On Next Page) Page 1 Of 2 <br />