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Mr. John Parker `w <br /> Boulevard Auto <br /> 2151 Country Club Blvd., Stockton <br /> Page 2 of 2 <br /> The EHD was concerned that the petroleum plume was not laterally or vertically <br /> defined and that the proposals included did not adequately address this concern. <br /> After discussing the concerns in detail, the following items were agreed upon: <br /> • Seven (7) monitoring wells are to be installed in hydrological unit (HU) 2 and <br /> six (6) monitoring wells were to be installed in HU-4. A work plan for the <br /> installations is to be submitted to the EHD by January 19, 2007 and, <br /> • A vapor intrusion evaluation (sampling) work plan is to be submitted to the <br /> EHD by January 19, 2007. <br /> Also discussed at the meeting was your consultant's recommendation to conduct a <br /> ground water extraction (GWE) feasibility/pilot test to evaluate this potential remedial <br /> option. The recommendation included installing at least one GWE well, conducting a <br /> pumping test, and evaluating the findings in a report to be submitted to the EHD. <br /> The EHD agreed that this recommendation could be warranted in the near future but <br /> would require the agreed upon monitoring well installations to be completed prior to <br /> conducting this test. If your consultant feels that GWE testing is still warranted, <br /> please submit a feasibility study to the EHD that discusses and compares the <br /> details, cost, time requirements and technical justifications for multiple remedial <br /> alternatives that could work at this site. If your consultant feels that the ground water <br /> petroleum plume is unstable or threatening a drinking water (well, surface supply, <br /> etc), please have them include a technical justification in support of interim remedial <br /> action (TRAP). <br /> Thank you again for your cooperation in the required investigation for this site. You <br /> may contact Michael Infurna at (209) 468-3454 should you have any questions or <br /> wish to discuss the site. Mr. Infurna can be reached by electronic mail at <br /> minfurna(a-)sicehd.com. <br /> Donna Heran, REHS, Director <br /> Ezz Hea h Depa ent <br /> Michael J. Infurna r., Senior REHS Nuel C. Henderson Jr., PG <br /> LOP / Site Mitigation Unit IV LOP / Site Mitigation Unit IV <br /> MI/ <br /> cc: CVRWQCB — James L. Barton, Sacramento <br /> SW RCB Technical — Mark Owens, Sacramento <br /> AGE - Tim Cuellar, 837 Shaw Rd, Stockton <br /> Chevron Texaco EMC — Darin L. Rouse, PO Box 6012 K2260 <br /> San Ramon, CA, 94583 <br />