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Mr. Marcus Pierce, Engineering Geologist Central Valley Regional Water Quality Control Board Subject: Diesel Impacted Soil Removal collected from the middle of each sidewall. These confirmation samples will be transported to the laboratory contracted to perform the analysis for pre-characterization samples, as described above, and analyzed for TPH-d by EPA method 8015-modified. The excavation will then be backfilled with clean borrow material and compacted via moisture conditioning and wheel roll. Compaction testing will not be conducted for the site due to the limited depth, as we anticipate that the proposed compaction method will render the location usable for its previous use (i.e., vehicle parking). The excavation area will then be flushed with the adjacent contours of the site. Equipment will be demobilized from the site following completion of these activities. This approach to excavation, confirmation sampling, and backfilling during a single mobilization is preferred for the following reasons: • The impacts to soil from the spill are presumed to be limited in extent and, in general, will be visually definable; • Armory personnel will have full use of their motor pool and parking facilities more expediently; and • Expensive excavation equipment will not be tied up at the site pending confirmation sample analytical results, and can be re-mobilized readily if necessary to do so. If confirmation sample results indicate that it is necessary to remobilize for additional excavation, the clean backfill material will be removed and stockpiled adjacent to the excavation, and additional soil will be excavated in the affected area. Confirmation samples will then be recollected to ensure all contaminated soil has been removed. REMEDIAL ACTION REPORT Upon completion of all field activities and waste disposal, a remedial action report will be prepared and submitted to CVRWQCB. A copy of the report will be forwarded to EHD for its files as well. The report will include a description of all field activities and digital photographs of field activities. In addition, the report will include all laboratory data and waste documentation including waste manifests and weight tickets. SCHEDULE Site activities will be implemented within 2 weeks of receiving the CVRWQCB's approval of this Work Plan. Initial site activities include underground utility clearance and pre- characterization/profile sampling. Site excavation activities will be implemented within approximately 2 weeks of receiving analytical results for pre-characterization and waste profile samples. QUALITY CONTROL PLAN This Quality Control Plan (QCP) defines OTIE's project quality management team organization and identifies key procedures for planning and implementing project quality controls. As the primary contractor, OTIE will perform all project management and oversight activities. OTIE's core management team is identified in the following table: Oneida Total Integrated Enterprises, LLC(OTIE) Page 3 of 5