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� II <br /> U <br /> '1California RegTonal Water Quality8ontrol- Board <br /> Central Valley Region <br /> Winston H.Hickoz Sacramento Main Office <br /> Secretary for Internet Address: http://www.swrcb:ca.gov/rwgcb5 Gray Davis <br /> Environmental 3443 Routier Road,Suite A,Sacramento,California 95827-3003 Governer <br /> Proleclion Phone(916)255-3000•FAX(916)255-3015 D <br /> JAN 2 9 Zo,01 <br /> 25 January 2001 ENVIRpNME <br /> PERMIT,IS RR, TH <br /> Ms. Margaret Lagorio <br /> Supervising Registered Environmental Health Specialist <br /> San Joaquin County.Environmental Health Division I. <br /> 304 East )Weber:Avenue_,_.. <br /> Stockton, CA 95202 <br /> NONCONCURRENCE WITH SAN JOAQUIN COUNTY'S NO FURTHER ACTION REQUIRED <br /> DETERMINATION, RUIZ GROCERY, 4491 WEST DURHAM FERRYROAD, TRACY <br /> Board staff reviewed San Joaquin County's Environmental Health Division Case Closure Summary for <br /> Ruiz Grocery and the supporting documents submitted by Clearwater Group Incorporated. We do not <br /> concur with San Joaquin County's closure recommendation due to the following: <br /> • The remaining concentration of MtBE in on-site monitoring well MW-2 is above the Primary <br /> Maximum Contaminant Level; <br /> • An on-site domestic water supply well is within 80 feet of monitoring well MW-2; and. <br /> • Groundwater contamination has not been defined in the current groundwater flow direction. <br /> If you have any questions,please call Marty Hartzell at (916) 255-3115. <br /> _ .GARY.M.,CARLTON,. _ -�. . <br /> Executive Officer <br /> Enclosures (Memo and App. B Checklist) <br /> cc: Ms. Elizabeth L. Haven, UST Program Manager, SWRCB, Sacramento 1 <br /> Ms. Wennilyn Fua, UST Cleanup Fund, SWRCB, Sacramento. <br /> California Environmental Protection Agency <br /> �a Recycled Paper <br /> a <br />