SITE INFORMATION AND CORRESPONDENCE

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• Section 2725 (f)(2) of the Corrective Action Requirements requires a feasibility study of at least two alternatives for restoring or protecting the beneficial uses of water. The soil vapor extraction (SVE) system which ARCO will installed will only address soil and will not address the groundwater which is already affected. The SVE system is an interim remedial action, simply to mitigate a possible nuisance condition and not a full remediation plan. ARCO will issue a revised corrective action plan for the site once an agreed upon course of action for the entire groundwater plume has been approved by the coalition of RPs. Because of the above conditions, ARCO does not believe a feasibility study is required at this time and requests that the permit to install the four vapor wells be issued soon. ARCO agrees with the County that groundwater could have been impacted by releases from the tank pit and island areas. However, sufficient soils information has previously been obtained immediately adjacent to the tank pit and island areas which has documented the existence of the "smear" zone at a depth commencing at 25 feet, therefore the four vapor wells will be drilled to a depth of 25 to 26 feet and not to the groundwater interface. Additionally, ARCO will analyze soil samples taken from wells VW-10 and VW-11 at a depth of 20 and 25 feet. The soil samples will also be analyzed for MTBE. ARCO understands that closure is not a current consideration for this site. ARCO also understands that the "smear" zone and associated groundwater plume throughout the area will need to be addressed by the coalition. ARCO requests that the boring permit application be approved as soon as possible so that ARCO can commence with the remediation of the upper 25 feet of the site. Please call me at 408-453-1498 if you have any questions regarding this letter. Sincerely, Kyle Christie cc: Margret Lagorio Jay Johnson