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California RegOnal Water Quality Control Board <br /> Central Valley Region <br /> Steven T.Butler Chair <br /> SecWinston H.Hickox > <br /> Gray Davis <br /> nvron entayfor Sacramento Main Office `'�'t q Governor <br /> Environmental Internet Address: http'.//www.swrcb.ca.gov/mgcbp V SEP c j ': C <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 J <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 25 September 2000 <br /> Durhim Ali Jubari Nagi Saleh-Ali Mohamed &Huda Gubary <br /> 667 O'Farrell Street#10 PO Box 1322 25 Poncetta Drive #201 <br /> San Francisco, CA 94109 Riverbank, CA 95367 Daly City, CA 94015 <br /> APPROVAL FOR FEASIBILITY TESTING <br /> RANCH MARKET, 23569 SOUTH SANTA FE ROAD, RIVERBANK, SAN JOA QUIN COUNTY <br /> I reviewed your 13 September 2000 Work Plan for Well Installation and Feasibility Testing(Workplan) <br /> prepared by Secor International Incorporated(Secor). <br /> As presented in the Workplan, Secor proposes to install one air sparge (AS) well to 45 feet, and six soil <br /> vapor extraction (SVE)wells to 30 feet, and conduct a two-day SVE/AS feasibility test at the site. <br /> During feasibility testing, Secor will monitor and record depth to water and dissolved oxygen levels in <br /> monitoring wells MW-1 through MW-4, and flowrate and vacuum/pressure at the AS and SVE wells. <br /> Extracted vapors will be monitored with a flame ionization detector, and burned in a thermal oxidizer <br /> prior to discharge to the atmosphere. The results of this testing will be used to prepare the Problem <br /> Assessment Report as required in my 18 August 2000 letter. <br /> All reports are to be submitted to the San Joaquin County Environmental Health Division and the <br /> Regional Board. Contact Mr. Mike Infurna(County) at (209) 468-3454 and me at least two business <br /> days prior to any site work to schedule a field inspection appointment. If you have any questions or <br /> comments, please call me at (916) 255-3115. <br /> � >/ w <br /> Marty Hartzell <br /> Associate Engineering Geologist <br /> cc: Ms. Wennilyn Fua, UST Cleanup Fund, SWRCB, Sacramento <br /> Mr. Mike Infurna, San Joaquin County Environmental Health Division, Stockton <br /> Mr. Jaff Auchterlonie, Secor International Incorporated, Sacramento <br /> California Environmental Protection Agency <br /> ped Recycled Paper <br />