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sampled on a quarterly basis anytime that it does not contain free-floating hydrocarbons • Since monitoring wells MW-7, MW-8, MW-9 and MW-10 provide useful information on the vertical migration of hydrocarbons as well as an "early warning" for contamination that may be moving toward the on-site drinking water well, ASE recommends that that this well remain on a quarterly sampling schedule • ASE recommends that monitoring wells MW-11 through MW-20 continue to be sampled on a quarterly basis since they are all relatively new and seasonal patterns for these wells have not be shown yet 6 ) ASE recommends that monitoring wells MW-13, MW-14, MW-15 and MW-19 be sampled monthly to provide additional information regarding the effectiveness of the groundwater remediation system 7 ) Once again, 1,2-DCA has not been detected in any of the site monitoring wells It 1s ASE's opinion that the 1,2-DCA that has been detected in area domestic wells is not related to a release at Frank's One Stop There are two houses in the site vicinity which have domestic wells that contain 1,2-DCA without MTBE An alternate water source has been provided to these two properties ASE requests direction from the San Joaquin County PHS-EHD as to h o w this situation should be dealt with 12 . 0 REPORT LIMITATIONS The results of this assessment represent conditions at the time of the soil and groundwater sampling, at the specific locations where the samples were collected, and for the specific parameters analyzed by t h e laboratory It does not fully characterize the site for contamination resulting from unknown sources, or for parameters not analyzed by the laboratory All of the laboratory work cited in this report was prepared under the direction of an independent CALrEPA certified laboratory The independent laboratory is solely responsible for the contents a n d conclusions of the chemical analysis data i Franks One Stop Report — November 2000 -20-