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PUBLIC HEALTH SERVICES <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 • Stockton, CA 95202 <br /> 209/468-3420 <br /> AUG 1 p 2001 <br /> PAUL SARRETT <br /> SOUTHLAND CORPORATION <br /> 10220 S W GREENBURY ROAD, SUITE 470 <br /> PORTLAND OR 97233 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) is the <br /> lead agency providing the oversight of the investigation and cleanup of releases from <br /> underground storage tanks (USTs)within San Joaquin County. PHS/EHD has a contract with the <br /> California State Water Resources Control Board to conduct an UST corrective action program. <br /> The three referenced sites listed below are in the PHS/EHD Local Oversight Program (LOP). <br /> 1. 853 E. Yosemite Avenue, Manteca LOP Site Code: 1369 <br /> 2. 4501 Pershing Avenue, Stockton LOP Site Code: 1233 <br /> 3. 4627 DaVinci Drive, Stockton LOP Site Code: 1074 <br /> PHS/EHD has completed review of the Second Quarter 2001 Monitoring and Sampling Reports <br /> prepared by IT Corporation for the three sites. <br /> The sites have existing monitoring wells and documented groundwater contamination. The <br /> vertical and lateral extent of gasoline and methyl tert butyl ether(MTBE)contamination in ground- <br /> water has not been defined at these sites. According to the California Code of Regulations, Title <br /> 23, Division 3, Chapter 16, Article 11, Section 2725, it is your responsibility to"assess the nature <br /> and vertical and lateral extent of the release and to determine a cost-effective method to cleanup" <br /> during the soil and groundwater investigation phase. IT Corporation has not defined the vertical <br /> and lateral extent of contamination, nor have they made any recommendations to do so. <br /> Additionally, they have not made any recommendations to implement corrective action. <br /> Please submit work plans for the three sites by September 10, 2001. The work plans must <br /> include a strategy to delineate the vertical and lateral extent of contamination in soil and <br /> groundwater as well as corrective action feasibility testing. The "Tri-Regional Board Staff <br /> Recommendations For Preliminary Evaluation and Investigation of Underground Tank Sites" <br /> along with its "Appendix A"and "Appendix B"should be used as guidance documents. <br /> If you have any further questions regarding this matter, contact Harlin Knoll at(209)468-3442. <br /> Donna Heran, REHS, Director <br /> Envir nmental Health Division <br /> Harlin Knoll, Senior REHS Dot Lofstrom, R.G. <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: CVRWQCB- Marty Hartzell <br /> IT Corporation <br /> A Division of San Joaquin County Health Care Services <br />