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FILE COPY <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> nq Pquly.,qp <br /> SAN JOAQUIN COUNTY <br /> ( Donna K Heron,R.E.H.S. Unit Supervisors <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Cq(iFORN`Pphone: (209 468-3420 <br /> Program Manager Tele ) Douglas W.Wilson,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Margaret Lagorio,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> KELLY LYNCH <br /> DEL MONTE FOODS <br /> 205 N WIGET LANE <br /> WALNUT CREEK CA 94598 <br /> RE: Del Monte Disco Site Site Code: 2498 <br /> 110 N. Filbert St. RO#: 0000188 <br /> Stockton, CA., 95205 <br /> WORK PLAN: 'Pilot Test Work Plan —Air and Ozone Spar4ina" <br /> DATED: April 18, 2002 <br /> PREPARED BY: Kleinfelder— David V. Jenkins, PE <br /> STATUS: APPROVED (with conditions noted below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN IH&S 25299 37 <br /> subd(c)(3)1: <br /> • Install one nested, triple casing, air sparging/soil vapor extraction well with <br /> two, one-inch, `micro-bubble diffusers' and one, 0.020" screened interval, <br /> two-inch PVC casing in an 8" hollow stem auger (HSA) boring onsite in <br /> petroleum source area and operate/test for one week and, <br /> • Conduct 'ex-situ' Ozone sparging bench scale test with 1,2-DCA <br /> contaminated groundwater from MW-DIS 11 and, <br /> • Collect 'pre' and 'post' groundwater samples and analyze for 1,2-DCA by <br /> EPA Method 8260B and TPHg, BTEX, and MtBE and, <br /> • Submit report of findings to EHD. <br /> COMMENTS AND CONDITIONS: <br /> • Provide at least two inches (2") of spacing between all casings and sides <br /> of borehole in nested well's bentonited and grouted levels (larger than 8" <br /> HSA and spacers may be needed) and, <br /> • Ozone sparging bench scale test not required by EHD and, <br /> • Submit EHD well permit application and fee and provide at least 48 <br /> working hours notice prior to drill start date. <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN IH&S 25299.37. subd(c)(3)1: <br /> • none <br /> DATED: July 15, 2002. BY: ! jfi79 <br /> Michael Infurna, nior RENS. (209) 468-3454 <br /> [X]Faxed to consultant on: <br />