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Page 2 of 3 <br /> Ns r/ <br /> From: Clint Harms [mailto:charms@secor.com] <br /> Sent: Friday, October 19, 2007 1:43 PM <br /> To: Mike Infurna [EH] <br /> Cc: Borgh, Bill: <br /> Subject: RE: CP 01205 Lathrop CAP <br /> Mike—After re-reading, the wording in section 6.1.6 is a little confusing. We are basically saying that OPE <br /> was effective and that in evaluating DPE conceptually as a remedial alternative for the site 6 wells would <br /> be required if this remedial alternative was chosen. Using 6 DPE wells and an estimated run time of 4 <br /> years for a DPE system,we generated the cost estimate in Table 3. However, SVE and ozone sparge are <br /> recommended because it is more cost effective than DPE. <br /> Clinton Harms <br /> Senior Scientist <br /> SECOR International <br /> 916.384.0715 <br /> From: Mike Infurna [EH] [mailto:MInfurna@sjcehd.com] <br /> Sent: Friday, October 19, 2007 1:11 PM <br /> To: Clint Harms <br /> Subject: CP 01205 Lathrop CAP <br /> Clint, <br /> I got a chance to review the Septl8, 2007 revised CAP you sent in. <br /> Thankyou for addressing IAS and your conclusions. I'm pretty much OK with the whole CAP thing <br /> except..... <br /> I was confused with DPE though... <br /> multiple places in the CAP eluded to DPE being effective and even stated "remediation of dissolved <br /> concentrations of TPHg, Benzene, and MtBE in the groundwater would effectively be addressed with a <br /> DPE system"(Section 6.1.6)and proposes six DPE installation. Then the remed alternative section (6.2) <br /> recm'd didn't call out DPE and discussed IAS vs ozone and SVE and detailed 15 ozone wells and four SVE <br /> well installations.... <br /> now when I think DPE wells, I think'stingee installations inside a SVE well with pumps, hoses, etc..what do <br /> YOU think of for DPE wells?. <br /> so, do you still plan on 6 DPE well installations onsite or not? <br /> Michael J. Infurna Jr. <br /> Senior RENS. CA Reg #5649 <br /> LOP/Site Mitigation Unit IV <br /> San Joaquin County Environmental <br /> Health Department(SJCEHD) <br /> 10/23/2007 <br />