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1pp - <br /> a, <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> JOGI KHANNA M.D.,M.P.H. < <br /> Health Officer •' • <br /> P.O.Boz 2009•(1601 East Haadoon Avenue)• <br /> Stodcoon.Cadl6oroia 95201 <br /> (209)468.3400 <br /> JOHN RUTHERFORD <br /> DESERT PETROLEUM J ! r <br /> U <br /> P O BOX 1501 FEB 2 5 1993 <br /> OXNARD CA 93032 <br /> RE: 950 W. Eleventh St. SrM CODE: 1401 <br /> Tracy, California <br /> This letter is being sent to summarize the issues discussed.at a meeting held at San <br /> Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> between PHS/EHD staff Diane Hinson and Linda Turkatte, Western Geo-Engineers <br /> representative George Converse and you on Thursday, February 11, 1993. <br /> The additional verification soil and groundwater sampling needed at this site to address <br /> the concerns noted in a letter dated April 18, 1991 from PHS/EHD to you was discussed <br /> at the meeting. <br /> The soil samples obtained in 1988 from the south and southeast ends of the former tank <br /> pit area indicate this area has not been impacted by petroleum hydrocarbons. Therefore, <br /> only the areas to the north-northeast and to the northwest of the former tank pit need <br /> further investigation to verify that these areas have not been impacted by petroleum <br /> hydrocarbons. <br /> As discussed at the meeting, a soil boring in each of these locations would be sufficient <br /> for this verification purpose. <br /> A monitoring well in the identified downgradient direction„ to the northeast of the former <br /> tank pit area at this site, is needed to verify the quality of the groundwater in this area. <br /> Also discussed at the meeting, a monitoring well constructed in the north-northeast soil <br /> boring would be sufficient to monitor this area of concern. <br /> The groundwater samples obtained for verification analysis will, in addition to total <br /> petroleum hydrocarbons, benzene, toluene, ethylbenzene and xylene, be analyzed for <br /> soluble lead. This test will be sufficient to verify that the groundwater quality has not <br /> been degraded by lead. <br /> A DI"M at Sm J009Wn Canty Hed1h Coe SUvk= <br />