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LOG OF WELL PW8-76A Page 1 of 2 <br />Date(s) Drilled: 2-23-94 to 2-24-94 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 Development: Surging w/compressed air <br />(No mud added) (-1600 gallons purged) <br />Pilot Diam: 6 inches Plus test pumping <br />Ream Diam: 12 inches (-360 gallons purged) <br />Drilled Depth: 80 feet <br />Depth Description <br />(ft-) <br />0 <br />11 <br />114 <br />SP--Brown FINE TO MEDIUM SAND with trace to little silt. <br />i'l!fi <br />CIJSC—Grayish brown to yellowish brown FINE SANDY CLAY to CLAYEY FINE SAND, <br />some of the material cemented and very hard, some oxides. <br />10 <br />12 <br />14 <br />16 i 11 SP—Brown to grayish brown FINE TO MEDIUM to FINE TO COARSE SAND, to trace silt, trace <br />, <br />18 <br />1 1 to some fine gravel to 1/4". <br />1 'i <br />20 <br />q „I, <br />it t IPII 22 'I I ' IllIjil't <br />24 rI <br />u <br />l' <br />26 <br />II <br />1 <br />'11111 • <br /> <br />if <br />28 CL—Bluish gray to grayish brown SILTY CLAY, locally some fine to medium sand, moderately <br />plastic. <br />30 <br />32 <br />34 <br />36 <br />38 (continued)