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6.0 PREFERRED RESPONSE ACTION Table 3 shows a comparative rating of three action alternatives for each area. The scores for the alternatives varied between 10.0 and 13.5. The best possible score for this analysis is 16.0; the lowest possible score is 4.0. The ratings for each of the alternatives are relative and subject to interpretation; however, they are an attempt to quantify the results of a qualitative screening of the alternatives. The ranking system facilitates the identification of the preferred alternative. 6.1 AREA A Demolition scored highest (12.0) compared to relatively close scores of 10.0 and 10.5 for abandonment and reuse of the sump, respectively. Since the Navy does not wish to reuse the facility, demolition of the sump is recommended as the preferred response action. It may be pointed out that demolition will also provide an opportunity to characterize better contamination in the soil around the sump and provide a chance to dig out contaminated soil for disposal. However, the present scope of work for the removal action does not address contaminated soil around the sump. The determination of the extent of contamination around the sump will be performed as a part of an RI/FS for NAVCOMMSTA, Stockton. 6.2 AREA C Clean up and reuse of the maintenance pit scored the highest rating (13.5), as compared to ratings of 12.5 and 12.0 for both abandonment and demolition. The advantages for reuse of the pit are a lower cost and easier permitting and legal requirements than the other two alternatives. Since the Navy also wants to be able to reuse the maintenance facility, a cleanup action is recommended on the preferred response action for Area C. 6.3 AREA J Low levels of contamination in Area J result in relatively high ratings for all three alternatives (13.5, 13.5, and 13.0, for reuse/abandonment and demolition, respectively). Since the Navy does not wish to reuse the facility, abandonment of the sump after removal of contents and clean up is recommended as the preferred response action for Area J. 22