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Quarterly Monitoring Report and Data Summary <br /> rDecember 1997 <br /> WEST CLAY PROPERTIES <br /> 639 West Clay Street, Stockton, California_ <br /> y ti i <br /> 10. INTRQDUCTZQN - <br /> In accordance with the request of Ms Tina Mayhew of West Clay Properties Adv <br /> anced <br /> GeoEnvironmental, Inc (AGE) has prepared this quarterly report for ground water Properties, <br /> toned <br /> activities conducted at 639 West Clay Street, Stockton, California This monitoring <br /> available previous analytical data available to AGE The site and the surroundingarea are dudes all <br /> , well and boring locations are illustrated on Fi ure12 <br /> Plan Crated <br /> in Figure I- Location Map Structures <br /> $ Site <br />' 20• BACKGROUND <br /> The site is located in a commercial area of low topogra hic relief <br /> (Figure 1) Previous site activities ever p in western Stockton, California <br /> Monitoring Report - October 1997, which a so summarizes?pprevious reporironmental ts <br /> and Quarterly <br /> Kleinfelder, Inc and EMCON Associates Site activities and l reports prepared by AGE, <br /> are summarized below 1 available previous analytical data <br /> 21 UST <br /> REMOVAL AND OVEREXCAVATION <br /> It is the understanding of AGE that one 1000- <br /> allon UST was The product lane from the former UST to the dsp nserewas e removedfrom e site in <br /> Oct <br /> May 1990 <br /> Approximately 550 cubic yards of hydrocarbon-impacted soil were removed from October I 993 <br /> area in March 1994 Soil was excavated to a depth of m the farmer UST <br /> petroleum hydrocarbons quantified as gasoline(TPH-g)were encountered osurf one ace excava ion rade (bsg) Total <br />' Sample and in one sidewall sample Therefore, the lateral and vertical extent of contaminationtion bottorri <br /> j not assessed Analytical results of UST and piping removal and overexcavat onsmpl s are <br /> sununarized on Tables I and 2 Sample locations are illustrated on Figure 3 s p <br /> 2 2 , MONITORING WELL AND SOIL BORING INSTALLATIONS , <br /> In March 1994, three monitoring wells and one additional soil boring <br /> were drilled and installed at the site Impacted soil and ground water we r encoMW-3eand-B-1)each c <br /> boring and additional assessment was required by the San Joaquin County Public Health Services <br /> h <br /> Environental Health Division(PHS-EHD) to define the extent of impacted te <br /> I p ed soil and ground water <br /> AdyPnred GeoEn,tronmeniai,Inc <br />