Laserfiche WebLink
INTRODUCTION <br /> This update, STATUS UPDATE 35, presents data from November 28, <br /> 1994 , through January 12, 1995 and includes the December 16, 1994 <br /> Quarterly monitoring/sampling <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 /> LOCATION <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; R6E, 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 (691) 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, through November 24 , 1994 . Since that time the <br /> unit has operated 100%s with the exception of downtime from <br /> December 12 , 1994 through January 3 , 1995, when the main <br /> electrical breaker turned off due to high electrical load, see <br /> Table 3 . As of January 12 , 1995 an estimated 74043 pounds of <br /> gasoline range nydrocarnons have been destroyed, see Taole 2, <br /> Chart 7 and Appendix A - Air Monitoring Report <br /> Since February 18, 1993 the vapor recovery/destruction has been <br /> declining from an average above 200 pounds per day of gasoline <br /> range hydrocarbons to a present low of 2 5 pounds per day on <br /> January 12 , 1995 <br /> GROUND WATER MONITORING <br /> Depth to ground water measurments were obtained from all monitor <br /> wells on December 12, 1994 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 /> PAGE 1 R603 UPDATE-35 1/17/95 <br />