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Mr Michael Infa rrna <br /> Page 4 <br /> • expressed particular concern about the possibility of oxidizing trivalent chromium to the more toxic <br /> and mobile hexavalent species and/or oxidizing bromide to the +5 valence state creating the toxic <br /> bromate ion Bench testing is required before RWQCB will consider permitting the infection of <br /> oxidizers into contaminated aquifers Depending upon the results of the bench testing, infection <br /> may be permitted with or without Waste Discharge Requirements <br /> Working in conjunction with SECOR International and CytoCulture Laboratories, we will prepare a <br /> workplan for bench testing that will address the concerns of the RWQCB and will evaluate the <br /> potential for Fenton's Reagent to oxidize the contaminants Based upon the results of the bench <br /> testing, we will either propose a pilot test or will pursue less aggressive remedial options for the site <br /> The next round of groundwater sampling is scheduled for February 2006 EHD will be provided with <br /> 48 hours notice prior to conducting fieldwork <br /> If you have any questions or comments please contact Ground Zero at your convenience <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> Ora <br /> Joseph L Vasq ez, <br /> Staff Geologist R <br /> Gregory P Stahl, PG 5023 `.qr <br /> CA Certified Hydrogeologist No 264 SOF CA1� <br /> Attachments <br /> cc Mr Nathan Crum, Valley Pacific Petroleum Services, Inc <br /> Ms Karen Collins, Environmental Closures, Inc <br /> Mr James L L Barton, RWQCB <br /> G 1GROUNDMWOOLSEY CHT)QMR1200514QM2005 00c <br />