Laserfiche WebLink
i <br /> 1386 EAST BEAMER STREET <br /> WEGE ESTERN WOODLAND, CA 95776-6003 <br /> GEO ENGINEERS FAX (916)662-0273 , f j <br /> '�. CALIF CONTRACTOR#513857 A CORPORATION (916 668-5300 {_ <br /> ` REGISTERED GEOLOGISTS <br /> 'i <br /> Mr. Srikanth Desappa ; February 25, 1993 <br /> USA PETROLEUM CORPORATION <br /> P.O. Box 1839 <br /> Santa Monica, California 90406 E <br /> (310) 452-6200 Fax (310) 450-4020 <br /> RE: Limited Drilling Report for USA ; Petroleum Corporation <br /> Station #65, 2500 West Lodi Avenue, Lodi, California. <br /> On February 8, 199X Western Geo-Engineers drilled an installed <br /> one ground water monitor well (MW8) at USA Petroleum Corp. <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 /> Woodward Drilling Company (C-57 license, X581639) used a truck <br /> mounted drilling rig, Mobile model B-57 with eight inch hollow <br /> stem augurs to drill MW8 . The boring was hand augered by r <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 /> cleaned prior- to use, and the sampling equipment was cleaned in <br /> C, 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 /> The samples that were selected for analysis were based on the <br />;r criteria of the highest Photo Ionization Detector (PID) readings, <br />'i two representative zone samples, top of water and at the base of <br />;{ the borehole. This information is presented in Table 1 . <br /> y 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. <br />:4 <br /> L� <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 /> ,t 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 />' i <br />