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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY u <br /> UnSupervrsors <br /> Donna K Heran,R E N S R E F{S <br /> Director 304 East Weber Avenue, Third Floor Mike Fluggms,R Carl Bor man, H S,R D i <br />' Al Olsen,R E It S Stockton, California 95202-2708 Douglas w Wilson,R E H S <br /> Program Manager 4�rTelephone hone ((l209) �468-3420 Margaret La ono,R E H S FOR <br /> Laurie A Cotulla,R E H S <br /> Program Manager Fax (209) 464-0138 Robert M R E H S <br />' Mark Barcellceilos,R E 13 S <br /> CESAR CRUZ / KATHERINE HALLIGAN <br /> PACIFIC BELL FEB 14 2003 <br /> 907 LINCLON RD <br /> STOCKTON CA 95207 <br />' RE Pacific Bell F2cillty Site Code 0001338 <br /> 10 E 12"' Street R4#. 1338 <br /> Tracy, CA 95376 <br />' San Joaquin County Environmental Health Department (EHD) has reviewed the <br /> `Additional Site Assessment Activities Report"dated November-2002 as <br /> submitted by Shaw Environmental on December 2, 2002 and has the following <br /> comments <br /> In discussions with staff of the Central Valley,Regional Water Quality Control <br /> Board (CVRWQCB) it was concluded that the levels of diesel contamination in <br /> the groundwater were not delineated and this site requires further investigation to <br />' assess the vertical and lateral extent of the impacted soil and groundwater <br /> Additionally, a sensitive receptor survey is to be conducted and groundwater flow <br /> direction in the area is to be determined <br /> Please submit the additional site assessment work plan to this office by March <br /> 31, 2003 To aid EHD's review of the work plan, justify each element of the work <br /> plan in the context of a site conceptual model constructed from the available data <br /> for the site <br />' Please wntact Michael Infurna at (209) 468-3454 if you have any questions Mr_ <br /> Infurna can also be reached by email at minfurna(a)slcehd corn <br /> tDonna Heran, REHS, Director <br /> Environmental Health Division <br /> ichael J Infurna WJrSenior REHS Margar Lagono, REHS <br />' `Site Mitigation Unit IV Supervisor <br /> • <br /> MI/ <br />' c Shaw Env — D Wynne, IT Corp, 4005 Port Chicago Hwy, Concord_ 94520 <br /> c CVRWQCB -- James Barton, Sacramento <br /> e <br /> 0 <br />