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PUBLIC fiEALTH SERICES <br /> SAN JOAQUIN COUNTY tCAWN, <br /> �4�.�o <br /> ENVIRONMENTAL HEALTH DIVISION e <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer a <br /> 304 E. Weber Ave., Third Floor • P O. Box 388 • Stockton, CA 95201-0385 • "+ '• . ..• " <br /> 209/468-3420 C0 <br /> CHUCK NICHOLS <br /> USA PETROLEUM .RUM „I;! 0Q ISS-630101 AGOURA CT#200 <br /> AGOURA HILLS CA 91301-4311 <br /> RE: USA Petroleum#110 <br /> 2132 Mariposa Road SITE CODE: 1669 <br /> Stockton Ca <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) has completed the <br /> review of the"Second Quarter 1996 Groundwater Monitoring Report"dated June, 1996, submitted by <br /> Park Environmental, and offers the following comments for your consideration. <br /> The quarterly report shows the groundwater sample results for the second quarter of 1996 and presents <br /> the conclusion that the groundwater plume is stable. The quarterly report also concludes that closure as a <br /> low risk site may be warranted. <br /> The last phase of field work concludes the investigation phase for this site. Therefore, the data gathered <br /> at this site to date must be compiled and presented in a corrective action plan (CAP). The CAP should <br /> present data on the nature and extent of the soil and groundwater plumes at the site and the impact of <br /> these plumes on the groundwater system. The CAP should also discuss the beneficial uses designated <br /> for the groundwater system and the predicted impact of this release on these uses, currently and in the <br /> future. Also, two remedial alternatives should be evaluated in the CAP, one of which can be passive <br /> natural attenuation. The two alternatives chosen for evaluation at this site must be discussed in detail and <br /> any conclusions as to the effectiveness of the alternatives must be based primarily on physical data from <br /> the site. The costs of each alternative must also be provided in some detail so that an accurate and <br /> informed decision can be made. The two alternatives must be evaluated for overall effectiveness and cost <br /> and the most cost effective approach at the site should be implemented. <br /> In addition and as requested in previous correspondence, please provide this agency with final <br /> disposal documentation of the waste generated from the last phase of field work. <br /> Also, please include methyl tertiary butyl ether(MTBE) in the sampling protocol as an additional <br /> constituent of concern. <br /> If you have any questions or wish to discuss this letter in more detail, please contact Linda Turkatte, <br /> Senior REHS, at(209) 468-3441. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Linda Turkatte, Senior REHS Margar Lagorio, REH <br /> Site Mitigation Unit Lead Senior <br /> LT <br /> c: CVRWQCB, Beth Thayer C: USA Petroleum, Srikanth Dasappa <br /> c: SWRCB Cleanup Fund, George Lockwood c: Park Environmental, Vern Bennett <br /> A Division of San Joaquin County Health Care Services <br />