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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> X <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue,Third Floor • Stockton, CA 95202 4i <br /> 209/468-3420 <br /> June 4, 1998 <br /> Tosco Marketing <br /> Attn: Dave Camille <br /> 2000 Crow Canyon PI., Ste 400 <br /> San Ramon, Ca 94583 <br /> RE: Existing Single wall tank upgrade requirements for tanks at 16500 Louise <br /> and 3202 <br /> Hammer Lane. <br /> In order to meet the 1998 upgrade requirements the following general items, <br /> additional to any other State required upgrade requirements found in Article 6 <br /> title 23, must be provided in order to obtain approval from the EHD to keep the <br /> existing single wall tank system. <br /> 1. A special inspector will be required to provide a determination on any single <br /> wall tank, for cathotic protection and for the structural soundness of the <br /> tanks. The EHD representative must be onsite and observe all inspections of <br /> the tank system made by a special inspector. Specific requirements of the <br /> inspection will be outlined by the EHD depending on the type and age of the <br /> tank to be upgraded. (CCR title 23 section 2660 (K)) <br /> 2. Tanks that are single wall fiberglass, steel, or steel clad must have a site <br /> assessment prior to approval of the plan for upgrading. (CCR title 23 section <br /> 2660 (1)) Assessments are made after application to the EHD Site Mitigation <br /> Unit. You may contact Margaret Lagorio, Supervising REHS at 209-468- <br /> 3449 for further information on applications for site assessments. <br /> 3. If the site is found to be contaminated, no further action will be permitted until <br /> a cleanup plan is approved. If tanks are approved to be left in place on a <br /> contaminated site by the EHD, a monitoring system must be installed which <br /> meets the requirements of the Health and Safety code section 25296 (c). <br /> Any continuation of contamination or increase noted in a monitoring well <br /> system will result in the requirement that tanks be replaced with double <br /> contained tank systems. <br /> A Division of San Joaquin County Health Care Services <br />