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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY Z' <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer P <br /> P.O.Box 2009• (1601 East Hazelton Avenue) • Stockton, California 95201 c4��Foa�'� <br /> (209)468-3400 <br /> KENNETH EARNEST <br /> ULTRAMAR INC <br /> P O BOX 466 �� <br /> HANFORD CA 93232-0466 <br /> RE: Beacon Station #492 SITE CODE: 14412 <br /> 470 N. Main <br /> Manteca, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the "Results of Investigation and Recommendations for Closure" report <br /> dated November 10, 1992 and the "Status Report" dated September 28, 1992 for the <br /> above referenced site. <br /> On July 7, 1992 PHS/EHD requested in a letter that documentation of the disposal of <br /> soil from MW 4 and of the disposal of development water and purged water be provided. <br /> This information has not been provided to PHS/EHD to date. In addition <br /> documentation of the disposal of the soil from the confirmation soil borings drilled <br /> October 8, 1992 and the disposal of the soil from the installation of monitoring wells <br /> MW 1, MW 2 and MW 3 has not been provided. <br /> In a letter dated April 18, 1991 PHS/EHD requested a 48 hour notice prior to <br /> groundwater sampling. Since that time the monitoring wells have been sampled four <br /> times without notification to PHS/EHD of the sampling activity. Inspection during <br /> sampling activities is an important part of PHS/EHD oversight. <br /> In the July 7, 1992 letter PHS/EHD stated that sampling of the monitoring wells should <br /> continue until site certification is given. PHS/EHD has not received water sample results <br /> since the July 1992 sampling. Please schedule a sampling event with PHS/EHD staff by <br /> March 16, 1993. <br /> On October 8, 1992 PHS/EHD was informed that a soil sample collected at 21 feet <br /> below ground surface on October 7, 1992 evidenced .005 ppm Ethyl benzene and .04 <br /> ppm Xylene. These results are not indicated in the November 10, 1992 report. <br /> Apparently the soil samples were analyzed a second time and these results are included <br /> in the November 1992 report. Please provide an explanation of this in your next report. <br /> A Division of San Joaquin County Health Care Services �� <br />