SITE INFORMATION AND CORRESPONDENCE

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San Joaquin County DIRECTOR pPp U Ip c Environmental Health Department Donna Heran,REHS ASSISTANT DIRECTOR 600 East Main Street Laurie Cotulla,REHS a Stockton, California 95202-3029 PROGRAM COORDINATORS --- Mike Huggins, REHS, RDI p ., 4� Foaa Website: www.sjgov.org/ehd Margaret Lagorio, REHSRobertMcClellon,REHS Phone: (209) 468.3420 Jeff Carruesco,REHS,RDI Fax: (209)464-0138 Kasey Foley,REHS February 18, 2009 Mr. Jerry Castro Pacific Car Wash 4405 Pacific Ave Stockton, CA 95204 Subject: Pacific Car Wish RO#: 0392 4405 Pacific Avenue AP#: 110-240-14 Stockton, CA 95205 Global ID#: T0607700499 The San Joaquin County Environmental Health Department (EHD) has reviewed your Request for Reduction of Monitoring Activities (letter) dated February 2, 2009, submitted by your consultant, Advanced GeoEnvironmental Inc. and provides the following comments. In the letter a reduction of groundwater monitoring for all the site wells to annual is requested and there is reference to the delay in reimbursement of corrective action costs from the State Water Resources Control Board Cleanup Fund (CUF). The EHD is aware of the current economic situation with the CUF and the difficulties it imposes for responsible parties continuing to investigate their sites. Please be aware that the California Code of Regulations, Title 23, Section 2652 (copy enclosed) requires owners of contaminated underground storage tank sites to report quarterly on the status of their site to the lead regulatory agency overseeing the investigation. The report must include an update on specific information and results of all corrective action (investigation) which has occurred during the period. An item that must be discussed in each quarterly report is future investigative actions and a time schedule for implementing the actions. You may prepare this report yourself unless geologic or engineering interpretation is included which would require that it be prepared by an appropriately registered professional. Your request to only collect and analyze ground water samples from the monitoring wells and submit a report once a year (annually) is not approved. You must submit a brief report on the status and time schedule for work at the site each quarter. Since you have a newly installed remediation system at the site it's effectiveness needs to be evaluated. The EHD require that monitoring wells in the contaminated ground water plume be sampled for the following constituents, by the listed EPA Method, and at the frequency noted below: • MW-1, 2, and 3 for TPHg, BTEX, MtBE and 1,2-DCA (EPA Method 8260B) twice a year (biannual).