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INTRODUCTION <br /> This update, STATUS UPDATE 36, presents data from January 12 , <br /> through February 8, 1995 and includes the sewer discharge update <br /> and results of venting MW8 <br /> The permit to dump treated ground water to the sewer has been <br /> renewed. Presently we are batch dumping the treated water from <br /> the "ConVault" whenever it is full . The water for treatment is <br /> collected from the vapor recovery condensate dropouts and <br /> produced from the sampling and monitoring of the monitor wells <br /> by Lawrence Tank Testing (LTT) pumping service . <br /> LOC- ATTON <br /> The station is located at 6425 Pacific Avenue at the intersection <br /> of Douglas Road, Stockton, in San Joaquin County, California <br /> The site lies in Section 21, T2N, RGE; MDB&M at approximately 12 <br /> feet above mean sea level (MSL) (see Figures 1, 2 , 3) The <br /> parcel is ## 31 and can be located in Assessor' s Book 97 on page <br /> 41 (97-041-31) . On October 2 , 1992, a licensed surveyor with <br /> Nolte & Assoc . surveyed all monitoring well locations and top of <br /> casing elevations to a known datum, ie City of Stockton Bench <br /> Mark Number 12 , elevation 11 74' above mean sea level <br /> VAPOR RECOVERY OPERATIONS AND RESULTS <br /> The original REMOX unit operated for a total of 14452 hours out <br /> Of a total of 21048 hours (690) As of September 2, 1994 the new <br /> replacement unit operated 11304 hours out of 16797 5 hours (67%s) , <br /> for a total of 25, 756 out of 37845 5 hours (680) An <br /> electrical problem associated with the REMOX make-up air blower <br /> and needed repair to the pilot assembly caused sporadic operation <br /> from September 2 , 1994 through February 4 , 1995 . As of <br /> February 8, 1995 an estimated 74079 pounds of gasoline range <br /> hydrocarbons have been destroyed, see Table 2 , Chart-Figure 5 and <br /> Appendix A - Air Monitoring Report <br /> Since April 15, 1993 the vapor recovery/destruction has been <br /> declining, from an average above 100 pounds per day of gasoline <br /> range hydrocarbons to a low of 2 5 pounds per day on January 12, <br /> 1995 Presently, the system is destroying between 5 to 6 . 5 <br /> pounds per day of gasoline range hydrocarbons . <br /> GROUND WATER MONITORING <br /> Depth to ground water measurments were obtained from all monitor <br /> wells on January 25, 1995 . The vapor extraction was off at the <br /> time, therefore no corrections to the measurements were necessary <br /> to compensate for reducing the atmospheric pressure at the well <br /> head. <br /> Figure 4, represents the measurements obtained on January 25, <br /> PAGE 1 <br />