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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION { <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Ocer <br /> 304 E. Weber Ave., Third Floor • R O. Box 388 • Stockton, CA 0 38� <br /> Q�IPOfta`P <br /> 209/468-3420 MARY LEHR MAILED DLC 11 199E <br /> 1250 EDGEWOOD DR <br /> LODI CA 95240 <br /> RE: Arts and Artists SITE CODE: 2423 <br /> 204 East Lodi Avenue <br /> Lodi CA 95240 <br /> San Joaquin County Public Health Services, Environmental Health Division (PH5/EHD) has completed review <br /> of the "Quarterly Report -July 1995" prepared by Advanced GeoEnvironmental and received on November <br /> 15,.1995. PHS/EHD has the following comments for your consideration. <br /> The report included the results of soil samples collected on May 17 - 19, 1995 during the installation of air <br /> sparge wells, SP1 and SP2 and groundwater samples collected on July 11, 1995. The analytical results <br /> indicated soil contamination to a vertical depth of 50 feet below ground surface. Groundwater contamination <br /> continued to be evidenced. <br /> Please note that Table 1 contained errors which should be corrected to preserve the historical integrity of the <br /> record. The actual benzene reporting limit for SPI at 50 feet and SP2 at 50 feet was 0.02 ppm rather than <br /> 0.005 ppm. In the future, summary tables must include the reporting limit of each sample. An amendment <br /> of Tables 1 and 3 should be included with the next quarterly report submitted. Also, PHS/EHD suggests <br /> strongly that depth to water information be contained in the same table as groundwater analytical results. <br /> Also, note that Figures 2 and 3 indicated the location of two monitoring wells designated MW7. A correction <br /> to these figures must be made and care taken to provide adequate quality control review, so that errors such fff <br /> as noted above can be corrected prior to regulatory release. <br /> With regard to the request to reduce the sampling frequency of MW6 and MW8, PHS/EHD does not grant the <br /> reduction based on current results. Slight contamination was detected in MW8 which may indicate the edge + <br /> of the contamination plume. Monitoring of the plume's boundary is necessary to demonstrate remedial <br /> effectiveness. <br /> It is PH5/EHD's intent to provide directions which will enable efficient and accurate evaluation of site <br /> conditions. PHS/EHD looks forward to the submittal of an update of the soil and groundwater remediation <br /> in progress. <br /> If you have any questions or wish to schedule a site inspection, please contact Mary Meays at(209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division t <br /> Ott, <br /> Mary Meays, Senior REHS Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> MM/204 LO D 1 <br /> c: Elizabeth Thayer, CVRWQCB c: Albert Ellis <br /> c: James DeMera c: Bob Marty, Advanced GeoEnvironmental <br /> A Division of San Joaquin County Health Care Services <br />