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�a inti - <br /> IN <br /> 04*m <br /> wo <br /> Imm <br /> SIERRA <br /> rv;tdin€;s were stispected to be the re,ult o1 nornial refueling;operations a'. the station: IIo+vcver. <br /> sanllilrs wrrc anah'zed to cenfinu the absence of Hydrocarbons. <br /> Ground water was encounxred during drillin!at approxinia-10v :,E to 18 Ct belowgrate <br />.. <br /> . Nater levels stabilized in all the wills at approximately 13,5 ft below grade,. <br /> The Unified Soil Classification System used fur 1094ing is included in Appendtx D. <br /> Subsurface sediincrits, OVNI readings, water level measuremvml% well corlstructfor.details,anii <br /> a typical well construction detail are shown Willi the borinr,logs in Appendix D. Weil construction <br /> details are also shown in Table 3 (Apperidix B). <br /> Drill cuttings and steam cleaning rinseate wer e stored on-site in 55-gallon Department of <br /> Transportatlon (D071-approved drums and each dnirn was scaled and labeled. "ine soil will be <br /> taken to an appropriate landfill for disposal. The steam cleaning rinseate will be taken tc Gibson <br /> RI-iricry of Bakersfield. California by a ChevTon-designated trucking company. <br /> :r <br /> 3. WELL DEVELOPMENT AND GROUND WATER SAMPLING <br /> t ti4ouiloring wells MW- z41W-2 and MW-3 were developed May 7. 1991 with a vented surge <br /> block in accordance with SFS Standard Opcnat:ng Procedure -Well Development (Appendix C), <br /> Ground water was removed from the wells after surging with PVC bailers, <br /> Ground water samples were collected from al:wells on May 9, 1991 in accordanve with <br /> SF_S Standard Operating Procedure- Water Sampling(Appendix Q. The well development and <br /> purge water were stored in 55-gallon DOT-approved drums and each drum was sealed and <br /> labeled. 'rAe water will be taken to Gibson Refinery of Bakersfield, California by a Chevron- <br /> designated trucking company. <br /> Page 6 <br />