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0 • <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair Gray Davis <br /> Winston H.HickoxGovernor <br /> Secretaryfor Sacramento Main Office <br /> Environmental intemet Address: http://www.swrcb.ca.gov/mgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 7 November 2001 <br /> Mr.Richard Bokides W.Navtej Dhingsa <br /> Mr.Cecil Dillon First Invest.Flag City,Inc. <br /> Flag City Ltd.Partnership Bokides Family Ltd.Part. <br /> 5517 Coronawood Lane <br /> 1820 W.Kettleman Lane, Suite E Lai,CAtol 95242 nue Carmichael, CA 95608 <br /> Lodi,CA 95242 <br /> REVIEW QUAR TERL Y MONITORINGREPORT, <br /> FLAG CITY CHEVRON, 6421 CAPITOL A CLEANUP AND ABATEVENUE,MENT ORDER(C&A))NO. 5 007LODI,SAN JOAQUIN COUNTY, <br /> 700 <br /> I reviewed the 15 October 2001 Quarterly Report—Third Quarter 2001 (QMR) submitted by Advanced <br /> GeoEnviromnental,Incorporated(AGE) for the Flag City Chevron site. The QMR documents decreasing trends <br /> of MtBE contamination in on-site monitoring and extraction wells due to continued groundwater extraction and <br /> treatment. Concentrations of MtBE in on-site monitoring well MW bhave <br /> decreased from a maximum of <br /> 5,700 micrograms per liter(µg/1)in June 2000 to 3.3 gg1l September <br /> 1. <br /> In our 8 August 2001 Quarterly Monitoring Report review letter,we requested an update to the 31 August 2000 <br /> Final Remediation Plan(FRP). The FRP Update was requested to address the off-site MtBE contamination <br /> identified in Flag City Chevron monitoring wells MW-7,MW-11A and MW-11B, and in Three B's Truck Plaza <br /> monitoring well MWA centered around Rocky's Domestic Well. The FRP Update was delinquent as of <br /> 24 September 2001, and must be submitted without further delay. <br /> In the QMR,AGE recommended continued quarterly monitoring and sampling coordinated with monitoring and <br /> sampling at Three B's Truck Plaza. We agree to continue monitoring and sampling; however,based on the <br /> decreasing trends documented in the historical groundwater monitoring tables, a reduction in sampling frequency <br /> and constituents is appropriate. Once the FRP Update is received,I can meet with AGE to discuss a plan to <br /> reduce sampling frequency and constituents sampled. <br /> AGE also recommended continued selective groundwater extraction in alternating weekly shifts from the north <br /> trench line(extraction wells EW-5,EW-7,EW-8, and EW-10)to the south trench line(extraction wells EW-2, <br /> EW-4,EW-6,and EW-9). As presented in Table 5 and on Figure 9 from the QMR,extraction wells EW-7 and <br /> EW-10 in the north trench line are non-detect for all constituents, and maximum MtBE concentrations were <br /> identified at extraction wells EW-5 (35 µgn),and EW-4(14 µg/1). Therefore,EW-4 and EW-5 should be operated <br /> continuously,and extraction wells EW-2,EW-6,EW-8,and EW-9 should be alternated weekly. <br /> I reviewed the sampling requirements for monitoring and reporting under General Order No..5-00-119 for <br /> Discharge to Surface Waters of Groundwater from Cleanup of Petroleum Fuel Pollution. Lead was initially <br /> identified at 0.0068 µg/1 in the influent sample, and at 0.019 µg/1 in the effluent sample collected on <br /> California Environmental Protection Agency <br /> Qd Recycled Paper <br /> The energy challenge facing California is real. Every Caiifomian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/mgcb5 <br />