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� <br />CrIVIENC. <br />6 June 2005 <br />Mr. Michael J. Infurna, Jr. <br />Senior REHS, LOP/Site Mitigation Unit IV <br />San Joaquin County Public Health Services <br />Environmental Health Division <br />304 East Weber Avenue, Third Floor <br />Stockton, California 95202 <br />d <br />7005 JUN -7 AM ' 9 44 <br />sAtN JoAlr LAIN, COUNTY <br />ENVft2ONNENTAL <br />HEt'LTH DEPARTHENT <br />Subject: Preliminary Assessment/Site Investigation Update Report <br />Stockton California Anny National Guard Complex <br />8010 Airport Way and 2000 Stimson Road, Stockton, California <br />GSA Contract No. GS- IOF-0185) <br />Dear Mr. Infama: <br />Versar, Inc. (Versar) is pleased to present a copy of the Preliminary Assessment/Site <br />Investigation (PA/SI) Update Report for the subject California Army National Guard (CARNG) <br />facility (Site). The PA/SI Update Report presents the findings of our field investigation <br />perfonned during February 2004. <br />Based on the findings of the investigation, a removal action is now funded and under <br />development for the CSMS pavement upwelling areas and a suspect CS burial Site. The removal <br />action is expected to lead to closure of these two Sites. Additionally, further investigation will <br />likely be required at the OMS fonner vehicle fueling station. No further investigation is <br />recornmended for the two AASF areas of concern (the groundwater beneath the former <br />underground storage tank area and the minor fuel release), four CSMS areas of concern (the <br />vehicle wash rack, former hazardous materials storage shed, sandblasting area, and the north <br />boundary drainage ditch), and one OMS area of concern (the vehicle wash rack). <br />If you have any questions or comments on the Site Investigation Report, please contact me at <br />(916) 863-9323 and at beraer(a�versar.com. <br />Respectfully submitted, <br />Tim Berger, R.G., H.G. <br />Program Manager <br />Versar — Southwest Region <br />Cc: MAJ Kenneth Koop, HQ CA ARNG (w/o attachment) <br />• SACRAMENTO AREA OFFICE <br />7844 MADISON AVENUE, SUITE 167 • FAIR OAKS, CA 95628 • TELEPHONE (916) 962-1612 FAX (916) 962-2678 <br />