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-�.-PUBLIC ITALTH SERVF ES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION "- ' . '` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stoc ton, CA 95202 <br /> 2091468-3420 C i.) <br /> LF Y <br /> MR MICHAEL GALLAGER SEP 15 1997 <br /> TRI-STAR HOMES <br /> PO BOX 1056 <br /> ALAMO CA 94507-1914 <br /> RE: Lot 51/Tract 2705 SITE CODE: 506762 <br /> Tri-Star Homes Development <br /> 2075 Fieldview Dr. <br /> Tracy, CA., 95736 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS- <br /> EHD), offers this written clarification regarding the recommendations that will be <br /> required in order to proceed with the investigatio (site assessment) and remediation of <br /> the petroleum impacted groundwater remaining at the above referenced site/property. <br /> The recently submitted report of the over-excavation of petroleum impacted soils has <br /> documented that the groundwater at the site has been impacted by the release(s) from <br /> the underground tanks (UGTs). The farms UGTs that were located at this property are <br /> not included in the definition of a UGT contained in the California Health and Safety <br /> Code or the California Code of Regulations. Therefore, PHS-EHD does not have <br /> regulatory authority to direct investigation and c eanup of this property, but can serve <br /> as regulatory oversight for the preliminary site assessment under a voluntary <br /> understanding with the responsible party. Without voluntary compliance to <br /> recommendations made by PHS-EHD during the site assessment, PHS-EHS is <br /> required to notify the Central Valley Regional Writer Quality Control Board (CVRWQCB) <br /> that the site is contaminated so they can provide regulatory oversight. <br /> Our local contaminated site database has been pdated to indicate that this site has <br /> groundwater contamination. In the absence of a voluntary understanding between the <br /> site's responsible party and PHS-EHD during the site assessment, the regulatory <br /> agency will be the CVRWQCB. <br /> Typical recommendations for site assessments ill include the lateral and vertical <br /> delineation of the soil and groundwater plume. his investigation will require the <br /> collection of soil samples during the placement f monitoring wells in positions around <br /> the former UGT pit that will provide groundwater depth, flow rate, direction, and <br /> A Division of San Joaquin Count Health Care Services <br />