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PUBLIC"HEALTH SERVICES <br /> SAN JOAQUIN.COUNTY <br /> ENVIRONMENTAL HEALTH.DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 a Stockton, CA 95201-0388 <br /> �1FCR <br /> (209) 468-3420 <br /> MAR 0 7 <br /> f ANTHONY RIVERA <br /> 41863 VIA SAN!:MIGUEL <br /> FREMONT CA 94538 <br /> RE: DELTA AIR STRIP _- SITE CODE: 2452 <br /> 15971 SOUTH TRACY BLVD <br /> TRACY CA 95376 . <br /> I4 San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/END) 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 May 16, 1990. <br /> The presence of contaminants at your facility exceed the allowable limits Of <br /> leaching potential as recommended by the LUFT Manual 1. The former <br /> underground storage tank(s) (UST) cannot be recommended for final closure <br /> without further investigation to determine the full extent of the soil and/or <br />{ groundwater 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 /> 3 to Section 25295 of the Health and Safety Code (HSC) . The appropriate <br /> disclosure of a hazardous waste discharge pursuant to Section25180.7 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 /> 1 Board SWRCB as the local agency overseeing the investigation of leaking <br /> Z 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 /> A Division of San,Joaquin County Health Care Services , <br /> P P <br />