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LOG OF WELL PW4-113A Page 1 of 3 <br /> Date(s) Drilled: 2-24-94 to 2-25-94 Geologist: Donald W. Clarke III (RFW) <br /> Drilling Contractor: Clark Well Client: TreaTek-CRA <br /> Driller/Helper: Ken Plaster/Tony Serpa Site: Occidental Chem./Simplot <br /> Rig Type: Failing Holemaster 1250 Location: Lathrop, California <br /> Method: Mud Rotary (3 1/2 bags Development: Surging w/compressed air <br /> bentonite quik-gel added) (>800 gallons purged) <br /> Pilot Diam: 6 inches Plus test pumping <br /> Ream Diam: 12 inches (— 400 gallons purged) <br /> Drilled Depth: 120 feet <br /> Depth Description <br /> 00 <br /> 0 <br /> SM/SP—Reddish brown SILTY FINE SAND to FINE SAND with trace to little silt. <br /> 2 <br /> 4 <br /> CL—Grayish brown FINE SANDY CLAY, cemented, very hard. <br /> 6 <br /> SP--Pale brown FINE TO MEDIUM SAND, trace silt. <br /> 8 <br /> 10 <br /> 12 <br /> 14 <br /> CL—Pale gray SILTY CLAY, moderately plastic. <br /> 16 <br /> 18 <br /> 20 <br /> SP--Pale gay to tan FINE TO COARSE SAND, little to some fine gravel to 3/8", especially <br /> 22 deeper. <br /> 24 <br /> 26 <br /> CL—Pale yellow brown SILTY CLAY, moderately plastic. <br /> 28 <br /> 30 <br /> 32 <br /> dGi6 SP--Li ht brown to li ht ra FINE TO COARSE to MEDIUM TO COARSE SAND, trace to little <br /> 34 ljiiy fine gravel to 1/4". <br /> >ul�lli�l'iiI�III; <br /> 36 <br /> Ilii I9;;r::: <br /> +raa�Inil l+:'r i <br /> 38 <br /> (continued) <br />