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.t <br /> 1 <br /> P <br /> 13.��tVIRONMENTAL HEALTH DEPARTMENT . <br /> ..__.. . MAY � TY <br /> SAN JOAQUIN COUNTY Unit Supervisors <br /> Cart Borgman. <br /> Donna K.Reran,R.E.x.S. 304 East Weber Avenue, Third Floor <br /> Mike Huggins, <br /> :< Director . Stockton., California .95202-2708 bougies w.wilaon.R.E.H.s. <br /> ' - Al Olsen, R.E.H.S. <br /> � Telephone: (209).468-3420 :MargacerLagorio,RE.H.S. <br /> Progro Manager Ptoberi bicClellon,R.E.H.S. <br /> 'Ci ipR� Laurie�ycotuila.RE.H.S. Fax: (209) 464-0138 .M�Barcellos.RE.H.S. <br /> Pr6gram Manager <br /> MAY M <br /> JERRY MOORE ((�)1 �.! •• !_2 2004. <br /> MOORE PETROLEUM CC; <br /> 976 W MARIPOSA AVE <br /> STOCKTON CA 95204 <br /> RE: Work Plan for Ozone Sparging <br /> And Workplan for a Limited Subsurface Site Investigation <br /> 5491 F Street <br /> Banta CA 95304 <br /> San Joaquin Cand <br /> ounty Environmental Health Department (EHD) d Workplandfor a <br /> reviewed Addendum to Workplan anon (tNPSSI), both dated 1)4 January 2004 and <br /> Limited Subsurface Site 9 In <br /> prepared by Apex Envirotech,. Inc. (AEI). Both documents were prepared <br /> res <br /> response to EHD directives issued by letter dated 10 remediation <br /> aner d on s since 1995. <br /> P <br /> has been under soil vapor ext <br /> ractlds ofhydrocarbonshave been removed from <br /> - - To date, an estimated 4,369 p Y <br /> the vadose zone with the current remediation <br /> as system. <br /> expectede therefore, AEI <br /> concentrations have not responded as <br /> prepared a work plan dated 26 September 2003 to enhance the SVE system by <br /> adding an ozone sparging system to breakdown <br /> dissolved <br /> �ocations and <br /> and <br /> other fuel components. EHD requested justification of theproposed <br /> depths of the ozone sparge wells. <br /> The AWP provides a model of a 25-foot radius of influence for the sparge points <br /> set at a depth of 10 feet below ground water level tan air poi nsea a to b f <br /> approximately 27 pounds per square Inch. Therefore 10 to 12 feet below the <br /> set at approximately 25 feet bsg, which is appoximatel Y <br /> ground water. The model is based on a uniform coarse sand as the sail media. <br /> The site-specific general lithology in the shallow <br /> zone <br /> is commonly Thesnumbe and fro and <br /> m 10 <br /> to 20 feet bsg, with silt more commonly at t get depth <br /> spacing of the ozone sparge points are situated to address impacted ground <br /> in the areas of highest impact and work <br /> gplan <br /> water and capillary fringe zone <br /> down-gradient margin of the site. EHD approves the ozone sparging <br /> as modified by the addendum. Please submit an application for a drilling permit <br /> and the $89.00 fee for each parcel to binvestigated and access agreements <br /> and/or encroachment permits as appropriate. <br />