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HALTH SERVIOESPUBLIC .� <br /> SAN JOAQUIN COUNTY h { <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 2091468-3420 <br /> APR 2 8 2000 <br /> KAREN PETRYNA <br /> EQUIVA SERVICES LLC <br /> P O BOX 7869 <br /> BURBANK CA 91501-7869 <br /> RE: Hammer Lane Shell SITE CODE: 1660 <br /> 7910 Lower Sacramento Road <br /> Stockton CA 95209 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) has <br /> reviewed the Groundwater Monitoring Report--First Quarter 2000 dated April 19, 2000 that was <br /> submitted by Cambria Environmental Technology, Inc. (Cambria) on behalf of the above <br /> referenced site and has the following comments. <br /> The report indicates a consistent trend of non-detect levels of BTEX and TPHg in the three on- <br /> site monitoring wells, and continued low-level hits of MtBE in Monitoring Well 3. The report <br /> states that"monitoring and sampling will now be conducted on an annual schedule in order to <br /> reduce costs associated with monitoring, sampling and reporting". Cambria states that this <br /> proposed annual monitoring would occur during the first quarter of each year. <br /> Title 23, Division 3, Chapter 16, Article 5, Section 2652(d) of the California Code of Regulations <br /> (CCR) requires that"Until investigation and clean-up are complete, the owner or operator shall <br /> submit reports to the local agency or Regional Water Quality Control Board, whichever is over <br /> seeing the clean-up, every three months or more frequently as specified by the agency". The <br /> Central Valley Regional Water Quality Control Board (CVRWQCB) requires that all <br /> contaminated sites conduct quarterly groundwater monitoring. Article 11 of the CCR, Title 23, <br /> details the Corrective Action Requirements. Following investigation and definition of the <br /> contaminant plumes, the responsible party (RP) is required to prepare a Corrective Action Plan <br /> (CAP), which includes a feasibility study to evaluate alternatives for remediation or mitigation of <br /> the unauthorized release. <br /> Until further notice you are directed to continue quarterly groundwater monitoring at the above <br /> referenced site. PHSIEHD recommends that the RP complete their feasibility study and CAP as <br /> soon as possible in order to hasten this site towards closure. if you have any questions please <br /> call Lori Duncan at (209)468-0337. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> Lori Duncan, Senior REHS Margare Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor, Unit IV <br /> cc: Marty Hartzell, CVRWQCB <br /> Joe Neely, Cambria <br /> A Division of San Joaquin County Health Care Services <br />