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ENVIRON WENTAL HEALTH` DEPARTMENT <br /> pUIN <br /> SAN JOAQUIN COUNTY <br /> Donna K. Heran, R.E.H.S. Unit Supervisors <br /> yi f Director 304 East Weber Avenue,Third Floor Carl Borgman,R.E.H.S. <br /> Laurie A. Cotulla, R.E.H.S. Stockton,California 95202-2708 Mike Huggins, R.E.H.S., R.D.I. <br /> Program Manager Douglas W.Wilson,R.E.H.S. <br /> Telephone: (209)468-3420 <br /> Margaret Lagorio,R.E.H.S. <br /> Fax: (209)464-0138 Robert McClellon, R.E.H.S. <br /> Website:www.sjgov.org/ehd/ Jeff Carruesco, R.E.H.S, <br /> DALE BOYETT <br /> BOYETT PETROLEUM <br /> P O BOX 576277 <br /> MODESTO CA 95357-6277 <br /> Re: BOYETT PETROLEUM Site Code: 1433 <br /> 419 S. MAIN ST. <br /> MANTECA CA 95336 <br /> WORKPLAN: Groundwater Investigation and Groundwater Extraction Work Plan <br /> DATED: May 16, 2006 PREPARED BY: Condor Earth Technologies, Inc. <br /> APPROVED ❑ with Conditions/See Below <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN(H&S <br /> 25296.10,s ubd.(c)(3).): <br /> 1. Advance 4 direct push soil borings on City of Manteca right of way to define the <br /> lateral extent of the contamination plume. One grab groundwater sample will be <br /> collected at first water approximately 17 feet below surface grade (bsg) and <br /> another sample at approximately 30 feet bsg. <br /> 2. Conduct a 7-day batch groundwater extraction from monitoring well MW-11, <br /> with option to conduct additional 7-day batch groundwater extractions if results <br /> of the monitoring well samples following the extraction effort failed to meet <br /> California Department of Health Services Primary Maximum Contaminant Level <br /> (MCL) of 13 micrograms per liter for MTBE. <br /> 3. Extracted groundwater will be treated using three 200-pound carbon canisters <br /> and discharge to City of Manteca sanitary sewer. Condor will obtain an <br /> Industrial Wastewater Discharge Permit (IWDP). <br /> COMMENTS AND CONDITIONS: <br /> 1. Limit the number of batch groundwater extraction to 3 rounds. A report <br /> evaluating the effect of groundwater extraction(s) should first be submitted to <br /> EHD to determine if more than 3 rounds of extraction is required. <br /> 2. Provide EHD a copy of the necessary permit(s) for groundwater discharge from <br /> the appropriate agencies, and a copy of the encroaching permit for City of <br /> Manteca right of way, before conducting the proposed work. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN (H&S 25296.10,(C)(3).): <br /> None <br /> DATED May 30,2006 BY <br /> Cc: CRWQCB,Central Valley Region—James L. L. Barton,PG <br /> Cc. Condor Earth Technologies, Inc. —Lee H. Morse,PG <br /> f <br />