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". <br /> PUBLIC� HEALT SERVICES <br /> SANJOAQUIN COUNTY r: <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 • Stockton, CA 95201-0388 i:6R <br /> 209/468-3424 <br /> KENNETH OLDS SUPERINTENDENT C cc <br /> LAMMERSVILLE ELEMENTARY <br /> SCHOOL DISTRICT if [�-- <br /> 16555 W VON SOSTEN RD Ei _ 2 fL001 <br /> TRACY CA 95376 <br /> RE: Lammersville School SITE CODE: 1749 <br /> 16555 W. Von Sosten Rd. <br /> Tracy, CA <br /> San Joaquin County Public Health Services <br /> f Environmental Health Division <br /> (PHS/EHD) has reviewed the "Quarterly Groundwater Monitoring Report" for the <br /> October and November 1994 groundwater sampling events, prepared by Geological <br /> Audit Services, Inc. for the above referenced site. <br /> Prior to the sampling of the monitoring wells in October and November 1994, the <br /> most recent laboratory data from groundwater samples collected from the site was <br /> in October 1992. At that time groundwater samples from MW2 and MW6 evidenced <br /> significant contamination. The! October and November 1994 groundwater sample <br /> results indicate low levels of contamination. <br /> Geological Audit Services, Inc. 1�proposed drilling soil borings and collecting <br /> grab water samples in two locations and drilling one soil boring near the former <br /> gasoline tank area to investigate the soil in that area. PHS/EHD concurs that <br /> further investigation in these areas are needled. <br /> In addition, PHS/EHD recommends further soil investigation near the former diesel <br /> tank area since PHS/EHD staff noted odor and discoloration of the soil at the <br /> time the diesel tank was removed;`. PHS/EHD also recommends sampling groundwater <br /> between MW6 and MW10. Investigation by push point sampling should be explored <br /> as an alternative to hollow stern auger drill gig sampling for this work. <br /> The existing monitoring wells should be sampled and the results submitted in a <br /> quarterly report until the investigation and remediation of the site is complete. <br /> Please schedule sampling of the monitoring weds immediately. <br /> If you have any questions contact Margaret: Lagorio at (209) 468-3449. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> Margaret Lagorio, Lead Senior RENS Diane Hinson, REES <br /> Site Mitigation Unit Supervisor <br /> ML <br /> c: Geological Audit Services, Inc <br /> c: CVRWQCB - Beth Thayer <br /> i <br /> f <br /> A Division of San Joaquin County Health Care Services <br />