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n , T <br /> I <br /> 1 r I r 1 <br /> I <br /> i 1 <br /> 1 E <br /> I ' <br /> r Quarterly Report -�Third Quarter 2002' <br /> RAINWATERICAR WASH <br /> ill420 West Yosemite Avenue, Manteca, California <br /> i <br /> 10. INTRODUCTION <br /> Advanced GeoEnvironmental,Inc (AGE)has prepared this quarterly report for 420 West Yosemite <br /> ' Avenue,Manteca,California(the site) The site setting is illustrated on Figure 1 Site structures and <br /> momtormg well locations are depicted on Figure 2 <br /> rThe objectives for the third quarter 2002 investigation were to characterize, assess and monitor <br /> dissolved petroleum hydrocarbons in ground water,to characterize ground water flow direction and <br /> gradient and to continue an mtenm ground water remediation at the site This report is prepared in i <br /> ' accordance with guidelines established by the California Regional Water Quality Control Board <br /> (RWQCB) - Central Valley Region for investigation of underground storage tank (UST) sites j <br /> ' Background information and a descnption of prior investigations at the 'site are included in <br /> Appendix A <br /> I <br /> The following is a brief summary of June, July, August and September 2002 site assessment and <br /> interim ground water remediation activities perfonned at the site <br /> 10 • 06 June through 26 September 2002 - Continued interim pump-and-treat ground water <br /> remediation utilizing on-site extraction well EW-1,discharge approximately 240,109 gallons <br /> ' of extracted and treated water into City of Manteca sanitary sewer system <br /> • 06 June 2002-Performance of a monthly ground water pump-and-treat influent and effluent <br /> " water monitors event <br /> 1 g t <br /> • 05 August 2002 - Performance of a monthly ground water pump-and-treat influent and <br /> ' effluent water monitonng event <br /> • 19 August through 24 September 2002 - Suspend interim ground water pump-and-treat <br /> ' operations for maintenance of carbon media vessels,pump-and-treat'system re-started on 24 <br /> September 2002 <br /> rr r <br /> 26 August 2002 - Performance of the third quarter 2002 ground water monitoring event { <br /> 26 September 2002 L Performance of a monthly ground water pump-and-treat influent and <br /> t ,'effluent water monitoring event <br /> 2,0 INTERIM GROUND WATER PUMP AND,TREAT REMEDIATION SYSTEM I;' <br /> F Between 06 June 2002 and 19 August and between 24 September and 26 September 2002,an interim <br /> ' ground water pump-and-treat system was in operation at the site, the pump-and;treat system was <br /> 'temporarily suspended between 19 August and 24 September 2002 due to maintenance activities of I <br /> I' �' <br /> I <br /> I I f Advanced CeoEnr�ronmental,inc <br />