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Hr -M ._,-1 GO 1J' 1J L: J._LL I L -d March 16, 1988 Roberts Oil Company Page 12 accuracy can be maintained and the plots will be of sufficient scale to portray the data in a useful manner. •1 -11 1• •1 -.� i'�• Exceltech shall prepare a Contamination Assessment Report summarizing the field and laboratory methods used, the data obtained, conclusions and recommendations based on our findings. The report will contain boring logs for each exploration boring drilled, logs and construction details of each monitoring well installed, results of all laboratory and slug testing, site maps showing features relevant to the investigation, maps showing ground water contamination and ground water flow, and cross-sections illustrating the subsurface geology. PHASE 3 Exceltech will prepare a report which will summarize methods of eliminating or abating refined petroleum product soil and ground water contamination. It should be recognized that there are a wide variety of remedial techniques, and that the selection of the most appropriate method will Involve factors beyond the strict technical feasibility (cost, regulatory acceptance, environmental impact suitability, and property values). The report will review methods such as biological degradation, mechanical abatement, air stripping, carbon adsorption, vapor well recovery of product, and combinations with extraction wells to limit the spread of contamination. The intent of the report will be to provide Roberts Oil Company with a preliminary review of the various options available. A complete report, including engineering design and costs, will be offered as part of the remdial action plan developed under Task 13.