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L <br /> i <br /> QUARTERLYSUMMARY REPORT <br /> FIRST QUARTER-2002 APR 2 3 2002 <br /> (January _March) { <br /> E ' <br /> I _ <br /> Tosco(76)Service Station No.6981 <br /> 4707 Pacific Ave Central Valle Re o Sacramento Branch <br /> Stockton,CA RWQCB Office: <br /> COUNTY: San Joaquin, <br /> ards of soil were <br /> 13 <br /> and six vapor extraction wells installed.eTa 00 as performed in March <br /> : The USTs were replaced in 1988• To date 16 onsite and 5 offsite borings have been drilled and ion <br /> BACKGROUND test wcl , 1990.Vapor Ex <br /> an in February S was installed and operas <br /> groundwater monitoring wells,one pumping or Extraction System (VE, <br /> ) <br /> excavated and aerated. Group wateT performed inAugustbegan <br /> 99. Vapor <br /> 1992. A pump was test wasp MW-12, and MW-13 to failitate re-construction of stree <br /> initiated in September 1994. Abandoned wells MW-3 and samples collected in Aubsurfacpril . <br /> dated 2/17/99) for additional borings/wed s. Submitted additional subsurface <br /> intersection Submitted work plan to install one offsite groundwater monitoring well and drill one soil boring in September <br /> 1997. Submitted Work Plan Addendum <br /> user areas. Submitted UST/line removal an <br /> investigation(borings/wells)report date 11/15/99. USTs and product piping rem <br /> Approximately 100 cy of soil was over-excavated from the product piping)ember <br /> sampling report(dated 8/29/00)• Pulsing of the VES was initiated in November 1998.az haswas installed in 2001 operated since April oanndd <br /> (UST removal <br /> operation on12/19/01-service rerouted, blcomower failure). An ozone microsp gsystem <br /> d and sampled groundwater monitoring wells. Prepared and submitted the <br /> RECENT QUARTER ACTIVITIES: Monitore <br /> quarterly summary report. Collected progress samples from ozone sparge system. <br /> re <br /> NEXT <br /> QUARTER <br /> an R ER ACTIV Replace Misting Catox abatement system with Garb n and ionitor and sample groundwater monitoring- nitiate peratio� submit quarterly <br /> ry <br /> CHARACTERIZATION/REMEDIAL STATUS: yes <br /> Soil contamination delineated? yes <br /> Dissolved ground water delineated? <br /> Free product delineated? n a <br /> Amount of hydrocarbon contaminant recovered <br /> this quarter/total? 0 1/ 4977 (lbs.) <br /> Soil remediation in progress? yes <br /> anticipated start? 9L94 <br /> anticipated completion? unknown' <br /> Dissolved/free product remediation <br /> in progress? no <br /> anticipated start? <br /> anticipated completion? <br /> Approximately 14,794 pounds of TPHg and 183 pounds of benzene have been extracted through 2001. <br /> CONSULTANT/CONTRACTOR: Gettler-Rvan Inc. <br /> 14o124.gsr <br />