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1386 EAST BEAMER STREET <br /> WEGE ESTERN WOODLAND, CA 95776-6003 <br /> GEG=ENGINEERS ) 62-0273 <br /> CALIF CONTRACTOR#513857 A CORPORATION 530 <br /> 0REGN <br /> REGISTERED GEOLOGISTS MAR <br /> ENVIRONMENTAL HM111 <br /> PERMIT/SERVICES <br /> Mr. Srikanth Desappa February 25, 1993 <br /> USA PETROLEUM CORPORATION ; <br /> P.O. Box 1839 <br /> Santa Monica, California 90406 <br /> z (310) 452-6200 Fax (31.0) 450-4020 <br /> Y RE: Limited Drilling Report for USA Petroleum Corporation <br /> Station #65, 2500 West Lodi Avenue, Lodi, California. <br /> On February 8, 1992 Western Geo-Engineers drilled an installed <br /> one ground water monitor well (MW8) at USA Petroleum Corp. i <br /> Station #65 . The placement of MW8 is 8 feet southwest and in the <br /> down gradient ground water flow direction, see Figure 1 . <br /> ,i <br /> Woodward Drilling Company (C-57 license, 581639) used a truck <br /> mounted drilling rig,: Mobile model 13-57 with eight inch hollow <br /> stem augurs to drill MW8 . The boring was hand augered by <br /> Woodward Drilling Co. 'to 5' prior to the rig drilling as an added <br /> precaution in the event 'hidden' piping or utilities exist that <br /> were not identified. :', The rig equipment and augers were steam <br /> r-� cleaned prior to use, :. and the sampling equipment was cleaned in <br /> the same fashion between each sampling interval . In addition, <br /> all lubricated parts that were to enter or approach the borings <br /> were lubricated with olive oil . <br /> To document the soil ',samples -taken at each interval during the <br /> drilling of the boring;, a WEGE field geologist prepared a boring <br /> log. The samples were described and categorized using lithologic <br /> descriptions and the Unified Soil Classification System (Appendix <br /> A, Borehole Logs) . <br /> �i <br /> The samples that were selected for analysis were based on the <br /> criteria of the highest Photo Ionization Detector (PID) readings, <br /> two representative zone samples, top of water and at the base of <br /> the borehole . This information is presented in Table 1 . <br /> The selected samples were analyzed for Total Fuel Hydrocarbons <br /> (TFH) as gasoline, and Volatile Aromatic Hydrocarbons (BTEX) <br /> utilizing EPA 5030 and 8020, respectively. i <br /> MW8 was completed on February 8, 1993 to a depth of 60 feet . A <br /> two inch PVC well with 25 feet of . 020" inch screen from 60 to 35 <br /> feet . The sand envelope for this well was #3 Monterey sand and a <br /> lower seal of bentonite . A neat cement with 5% bentonite was <br /> 1 � <br /> ,r -a <br />