Laserfiche WebLink
t <br /> PACIFIC <br /> ENVIRONMENTAL <br /> GROUP INC. <br /> r' <br /> inn 2 3 <br /> `� <br /> April 23, 1991 <br /> Project 310-01.02 <br /> Mr.Ren Buck <br /> UNOCAL Corporation <br /> 2000 Crow Canyon Place,Suite 400 <br /> San Ramon,California 94583 <br /> Re: UNOCAL Bulk Plant 0785 <br /> 8203 East lith Street <br /> Tracy, California <br /> Dear Mr.Bock: <br /> i This letter presents the findings of a quarterly groundwater monitoring program <br /> being performed by Pacific Environmental Group,Inc.(PACIFIC) at the above <br /> referenced site(Figure 1). The most recent groundwater monitoring event took <br /> place on February 14, 1991, and included the sampling and analysis of groundwater <br /> from site wells,and preparation of groundwater elevation contour and dissolved <br /> hvdrocarbon concentration maps. <br /> Site Conditions <br /> UNOCAL bulk plant with two 19,.500-gallon and <br /> The site is an operating <br /> two 20,00G-gallon above-ground hydrocarbon storage tanks located in the western <br /> portion of the property(Figure 2). The 19,500-gallon tanks contain diesel and <br /> super unleaded gasoline, and the 20,000 gallon tanks contain regular leaded <br /> gasoline and unleaded gasoline Thera gaze currcatly':thr66grotmdwate <br /> --- - - - -- <br /> �montto=g wells_on site,desivnated LJ'1,iJ.-?,and J;s'� Each site well is�7 feet <br /> ep and all wells are constructed of in <br /> 0ch diameter PVC casing. <br /> Findings <br /> Groundwater occurred at an approxii n to depth of 9Aet below ground surface#on <br /> February 14, 1991 with a n'o iWesterly flow direcuonsat a$radieut of 0 00� <br /> (Table 1,Fiwre 3). This data indicates an approximate 0.6 foot increase in <br /> 161)1 Civic Center Drive, Suite 202.5anra Clara. California 93050 1at181 984-6563 FAX: f4o61 243-39;' <br /> 620 Contra costa Boulevard, Suite 209, Pleasant Hill,California 94523 (415)8'_5.0855 FAX: i41 i!825-0881 <br />