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1 <br />' Canepa's Car Wash, 6230 Pacific Ave , Stockton, California January 26, 1996 <br /> Response to letter from PHS/EHD dated 1-8-96 Page 2 <br /> I <br /> Page 1, 4f4 : Chronology regarding management, operation and specs for the STYE <br />' system <br /> Copies of the field notes by the operators of the SVE system operation and maintenance <br />' are included as Appendix I) Soil volume calculations estimate the treatment volume at <br /> 3,700 cubic yards (cy) <br /> The system will has a maximum flow rate of 160 cfm from a centrifugal blower capable of <br /> Ipulling 3 inches of mercury Figures from the laboratory samples taken during the field <br /> inspection by SJVUAPCD shows a 95+% efficiency of the system (Appendix C) The <br /> SVE system was shut down on 6-9-95 due to non-payment (to WHF) of operational and <br /> Imaintenance costs (by owner) <br /> Page 1, 1[5 : Work plan The data requested in this paragraph exists in previously <br /> published reports Site maps are included showing the location of the soil vapor <br /> I extraction wells (Appendix D) and the groundwater monitonng wells (Appendix E) It is <br /> not necessary to " explore the conditions of all soil vapor extraction and monitoring well <br /> on site evaluating each well for the presence or absence of water in or above the <br /> screened interval " The soil vapor schematic is included as Appendix F, and the <br /> Bormg/Well Construction Logs for the monitoring wells is Appendix G The historical <br /> groundwater level data from the Quarterly Groundwater Sampling Report table is included <br /> as Appendix H Groundwater is recorded as Depth To Water (DTW) and as <br /> GroundWater Elevation (GWE) in feet above mean sea level (msl) Data covers the <br /> period from 11/93 to 6/95 <br /> I <br /> Page 2, ¶1 : WHF has always notified and will continue to notify PHS/EHD Site <br /> Mitigation Staff for approval of all field oriented site assessment work Site work was not <br /> always witnessed by PHS/EHD staff due to available personnel It would be difficult to <br /> obtain wntten exclusions in advance of a "no-show" of PHS/EHD staff Upon request, <br /> WHF will provide copies of Fax's sent on numerous occasions for advance notice of site <br /> work <br /> Page 2, ¶3 : At the discovery ry of soil contamnation during the tankremoval excavation, <br /> this site was given emergency status due to the high levels of contamination and the <br /> hardship that would be imposed on Mr Canapa's business During initial discussions <br /> between Mr Steve Furnas (VHF) and Ms Diane Hinson (PHS/EHD), verbal County <br /> approval was given for WHF to proceed (bypassing the bidding process) with the <br /> installation of the soil gas vapor and inowtoi ing wells Tlus work had to be completed <br /> before the access for the business could be restored <br /> I <br />