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PUBLIC HtALTH SERVICES <br />SAN JOAQUIN COUNTY <br />ENVIRONMENTAL HEALTH DIVISION <br />Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br />304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 <br />209/468-3420 <br />STATE MILITARY DEPARTMENT <br />P 0 BOX 214405 <br />SACRAMENTO CA 95821 <br />C(DDe 25, 1996 <br />ry <br />RE: OMS #24 STATE MILITARY DEPT SITE CODE: 231717 <br />8010 S AIRPORT WAY <br />STOCKTON CA 95206 <br />San Joaquin County Public Health Services, Environmental Health Division <br />(PHS/EHD) has recently reviewed the analytical results of the soil and/or <br />water samples taken from beneath the underground storage tank(s) that were/was <br />removed from this site on April 25, 1996. <br />The presence of contaminants at your facility exceed the allowable limits of <br />leaching potential as recommended by the LUFT Manual'. The former underground <br />storage tank(s) (UST) cannot be recommended for final closure without further <br />investigation to determine the full extent of the soil and/or groundwater <br />problem. <br />PHS/EHD is providing you notification that an "Underground Storage Tank <br />Unauthorized Release (Leak)/Contaminated Site Report" has been filed pursuant <br />to Section 25295 of the Health and Safety Code (HSC). The appropriate <br />disclosure of a hazardous waste discharge pursuant to Section 25180.7 of the <br />Health and Safety Code has been made, and the site has been placed on the list <br />of contaminated sites in San Joaquin County which is maintained by PHS/EHD. <br />PHS/EHD has been designated by the State of California Water Resources Control <br />Board (SWRCB) as the local agency overseeing the investigation of leaking <br />USTs. Pursuant to Section 25299.37 (HSC), "dischargers" must take corrective <br />action in response to the unauthorized release. <br />Please be advised that PHS/EHD will be utilizing the SWRCB "Prioritization <br />System for Leaking Underground Storage Tank Sites" ranking list in order to <br />prioritize all the contaminated sites. The "Prioritization System" has <br />established criteria to distinguish between High Priority Sites, Moderate <br />Priority Sites, and Low Priority Sites. Site specific conditions which <br />influence the placement within the ranking system are, for example, depth to <br />groundwater, proximity to a drinking water source (municipal or domestic <br />well), the extent of soil contamination, and the site's clean up funding <br />availability. <br />Based upon the priority ranking, you will be directed to begin the required <br />investigation. However, given the conditions for the prioritization, wherever <br />possible PHS/EHD will work with you to coincide enforcement directives in <br />conjunction with secured clean up funding. If you have any questions, contact <br />the PHS/EHD Site Mitigation Unit for further information at (209) 468-3450. <br />If your tank removal was recent and you are not planning any remedial <br />activities within 90 days, the tank excavation should be closed. It has been <br />our experience that open tank excavations allow for rapid downward migration <br />of contaminants. Contact the appropriate building department for specific <br />requirements that may be necessary prior to filling with pea gravel and/or <br />compacting the tank excavation with clean fill soil. <br />A Division of San Joaquin County Health Care Services <br />