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J <br /> PACIFIC <br /> ENVIRONMENTAL <br /> GROUP INC <br /> Jt 71f 7 <br />' November 22, 1995 <br /> Project 310-097 IA <br />' Mr Ed Ralston <br /> Unocal Corporation <br /> 2000 Crow Canyon Place, Suite 400 <br />' San Ramon, California 94583 <br />' Re Soil and Groundwater Assessment <br /> Former Unocal Service Station 0123 <br /> 1034 Central Avenue at 11th Street <br /> Tracy, California <br /> Dear Mr Ralston <br /> This report, prepared by Pacific Environmental Group, Inc (PACIFIC) for Union Oil <br /> Company of California (d b a Unocal), presents the findings of a soil and groundwater <br /> investigation conducted at the site referenced above(Figure 1) The work was performed <br />' on May 18 and 19, 1995 and June 26, 1995 as described in PACIFIC work plans, dated <br /> October 6, 1994, and June 22, 1995 The scope of work included the dulling of nine✓ <br /> shallow exploratory borings and the installation of three groundwater monitoring to <br />' characteYwasperformedto <br /> soil and groundwater conditions beneath the site Additionally, exploratory <br /> trenchindetermine the fate of former underground storage tanks <br />' (USTs) that have been shown on historical Unocal general arrangement plans <br /> This report includes discussions of the site background, a description of the scope of work <br /> performed, the results of the current mvestigation, conclusions and recommendations <br /> PURPOSE <br />' This soil and groundwater investigation was performed on behalf of Unocal, and in <br /> response to the San Joaquin County Public Health Services, Environmental Health Division <br />' (PHS/EHD)July 7, 1994 and August 29, 1994 letters which requested a soil and <br /> groundwater investigation at the former service station site <br /> The purposes of this investigation were to (1) assess the extent of hydrocarbon-impacted <br /> .> soil and groundwater beneath the site, (2) determine the fate of two former UST <br /> i <br />' 2025 Gateway Place, Suite 440, San Jose, California 95110 (408)441-7500 FAX (408)441-7539 <br />