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{ <br /> U L) <br /> BEST CALIFORNIA G" AS, LTD <br /> March 17,2009 0-95079 <br /> Mr. Michael J. Infurna Jr; <br /> Senior REHS <br /> County of San Joaquin <br /> Site Mitigation Unit IV/LOP ,. <br /> 600 East Main Street <br /> Stockton, CA 95202 <br /> Re: Former Best California Gas,Ltd Station #171 SJCSMU Case#. 1299 <br /> ARCO Products Co. Station#9600 CVRWQCB #: 390187 <br /> 1250 North Wilson Way <br /> Stockton, CA 95205 <br /> Former Best California Gas Ltd Station#172 SJCSMU Case#: 1227 <br /> Circle K Station #2705449 CVRWQCB #: 390652 <br /> 7647 Pacific Avenue <br /> Stockton, CA 95207 <br /> Subject: Request to Conduct Non-Purge Groundwater Sampling <br /> r <br /> Dear Mr. Infurna: <br /> This letter is written as a request to conduct groundwater sampling using anon-purge method for monitoring <br /> wells at the above-referenced sites under your oversight at the San Joaquin County Site Mitigation Unit <br /> (SJCSMU). Figures showing the well locations at each site are enclosed!: The purpose of this request is to <br /> reduce costs and energy expenditure,so that more resources are available for higher priority tasks such as site <br /> remediation. By implementing these proposed non-purge sampling measures,a significant cost savings can be <br /> realized for these sites. The following table lists the sites that you oversee,indicating the estimated savings <br /> for each:. <br /> If SS# Case# Ownership Address Total t Volume Wells Estimated <br /> Wells Purged Selected Savings <br /> Water for Initial ($/year) <br /> (gals./yr.) Method <br /> Testing <br /> 171 CVRWQCB Best California 1250 North Wilson ' 10 1,400 TB-7 $5,070 <br /> #390187 Gas,Ltd Way, Stockton,CA EW-5S <br /> 95205 <br /> 13116 Imperial Highway, Santa Fe Springs,CA 90670-0138.'(562)921-3581 <br />