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k" KLEINFELDER complete Phase I Environmental Site Assessment (ESA) be completed to evaluate the possibility of other on-site and off-site sources of the groundwater contamination. The drilling returns (soil only) have been shown to be below laboratory detection limits of any of the constituents analyzed for in this investigation and therefore can be spread out on unimproved portions of the site following approval by Ms. Lori Duncan of the San Joaquin County PHS/EHD to do so. The rinseate water from the drilling operations and purge water collected from the monitoring activities of monitoring wells MW -1 and MW -2 is potentially contaminated and should be disposed of at an approved facility. Kleinfelder can aid the either Tradeway Chevrolet or AKF Development to accomplish this task at an additional cost. It should be noted that rinseate water and purge water collected from monitoring well MW -3 has shown no detectable concentrations above the laboratory detection limits and therefore can be dispersed to unimproved portions of the site, following approval from the PHS/EHD. The groundwater monitoring wells should continue to be monitored in a uniform manner to establish background groundwater quality parameters. Kleinfelder recommends a quarterly schedule. For further information regarding Kleinfelder's conclusions and recommendations please see the following report. This report, and the conclusions and recommendations presented in this Executive Summary, are subject to the "Limitations" presented in Chapter 7 of this report. Any other party other than AKF Development Co. who would like to use this report shall notify Kleinfelder, Inc. of such intended use by executing the "Application for Authorization to Use" contained in Appendix G. 20-3978-03.CHEV / ST02R111 Page 2 of 18 Copyright 2002, Kleinfelder, Inc. July 1, 2002