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l <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTYII <br /> ENVIRONMENTAL HEALTH DIVISION =` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 c'FORa <br /> 209/468-3420 FILE <br /> C <br /> BERNIE SLOOP <br /> AMERICAN MOULDING & MILLWORK WL 2 7 IM <br /> PO BOX 8220 <br /> STOCKTON CA 95208 <br /> RE: 2801 West Lane, Stockton, CA Site: 18822 <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) has <br /> reviewed the investigative work done at this site relating to a leaking Underground Storage Tank <br /> (UST). A 10,000 gallon diesel UST was removed undeIr inspection of PHS/EHD on August 27, <br /> 1993. Extensive excavation of soil below this UST occurred after UST removal. Contaminated <br /> soil was removed and stockpiled separately on site. Soil stockpile and excavation soil samples <br /> were collected and analyzed for Total Petroleum Hydrocarbon as diesel (TPHd) and Benzene, <br /> Toluene, Xylene and Ethylbenzene (BTEX). Results of the analysis evidenced non detectable <br /> TPHd and BTEX at 45 feet below surface grade (bsg). Some of the soil stockpiles were <br /> contaminated with TPHd and BTEX. "Clean" soils were allowed to be returned to the <br /> excavation. <br /> Since the time of the above contaminated soil investigation/remediation in 1994, groundwater <br /> depth measurements at the property indicate a current groundwater level of approximately 47.5 <br /> feet bsg. The groundwater level was approximately 60I feet bsg in 1994. The increase of the <br /> groundwater level is of concern to PHS/EHD becaLse of the possibility of groundwater <br /> contacting contaminated soil areas. <br /> Due to mitigation efforts to remove contaminants from the soil after the UST removal and non- <br /> detectable TPHd and BTEX in soil samples collected at 45 feet bsg, this site appears to be a <br /> candidate for closure. Prior to consideration for closure it will be necessary to confirm non <br /> detection of TPHd and BTEX in soil and groundwater at the groundwater/soil interface and <br /> below 45 feet bsg. A closure report including all pertinent information regarding investigation <br /> work done at this site (including disposition of cod taminated soil stockpiles and related <br /> documents) is required by PHS/EHD. <br /> If you have questions regarding this letter contact Carol Oz, Senior REHS, at(209)468-3440. <br /> Donna Heran, Director <br /> Environmental Health Division <br /> Carol Oz, Senior REHS lvlargaret Lagorio, REHS <br /> Site Mitigation Unit IV Supervisor <br /> I <br /> cc: Mark List-CVRWQCB <br /> Bob Marty-AGE <br /> A Division of San Joaquin County I Icalch Care Services <br />