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Brett Hunter, Chevron page 2 <br /> 2103 Country Club Blvd <br /> Method 8020A or 8021 B. At least one sample per site <br /> that is positive for MTBE by Method 8020A or 8021 B <br /> should be analyzed by EPA Method 8240B or 8260A to <br /> confirm and rule out false positives as per Cal/EPA <br /> memo dated August 22, 1996. <br /> If this is unacceptable to you or you choose to accept this modification but fail to comply <br /> with the requirements noted above, your site's gauging and monitoring requirements <br /> are to immediately return to quarterly and reports are to be submitted before the next <br /> field sampling event. <br /> The Benzene concentration in MW-1, located just down gradient of the former tanks, is <br /> at the highest level (15,000 ug/I) ever recorded. Currently this site does not qualify for a <br /> low risk evaluation and PHS-EHD highly recommends you aggressively take steps to <br /> reduce the petroleum saturated soils increasing impact to the shallow groundwater both <br /> on and offsite. PHS-EHD has been very patient and tolerant of your less than assertive <br /> action at this site and offers this last recommendation prior to stepping up to its next <br /> level of enforcement. Years of just monitoring the groundwater petroleum <br /> concentrations have indicated that natural degradation is not occurring at this site and it <br /> should be very obvious that other responsible actions from Chevron are needed <br /> immediately. <br /> PHS-EHD appreciates the information recently submitted in the fourth quarterly report <br /> and is awaiting your report of the receptor survey and the results of your proposal to <br /> access the Kwikee Mart monitoring wells. I encourage you to notify me quickly of your <br /> decision on the modifications to the sampling frequency and your timely submittal of the <br /> results to our office. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Michael Infurna Jr., Senior REHS Marg/af4t Lagorio <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c: Ron Berberian - 2021 W. March Ln., Ste 2A, Stockton, 95207 <br /> c: Patrick Craig - 721 N. Union St., Stockton, 95205 <br /> c: James Brathvode - CVRWQCB <br />