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i "a ----------------- <br /> PUBLIC HSERVICES � <br /> SAN JOAQUIN COUNTY e a� <br /> JOGI KHANNA 0.,M.P.H. <br /> :e <br /> Health Officer <br /> P.O.Sox 2009 (1601 East Hazelton Avenue)o Stockton,California 95201 i i5 <br /> (209)469-3400 <br /> �r <br /> cc <br /> JOHN RUTHERFORD `~ t� <br /> DESERT PETROLEUM <br /> P o Box 1601 FEB 2 5 199:3 <br /> OXNARD CA 93032 <br /> RE: 950 W. Eleventh St. SITE CODE: 1401 <br /> Tracy, California <br /> This letter is being sent to summarize the issues discussed at a meeting held at Sari <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 vedficat►:on soil and groundwater sampling needed at this site to address <br /> `3 the corlceras noted in a letter .-fated 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 constnlcted in the north-northeast soil <br /> boring would be sufficient to monitor this area of concern. <br /> The groundwater samples obtained for verification analyst, will, in addition to total <br /> petroleum hydrocarbons, benzene, toluene, ethylbenzene and xylene, be analyzed for <br /> soluble Iead. This test will be sufficient to verify that the groundwater quality has not <br /> been degraded by lead. <br /> A WvWon of San)ozyuln County Hc2hh Care 5cswcn <br />