Laserfiche WebLink
MMEa; F : <br /> up <br /> a I�is <br /> Fe <br /> r <br /> f��f71f3�rBd (jgpsjff'@/Jj� a191.E Power Inn Road, Sacramento, CA 951126 (916)452.29[)1 <br /> •FREMONT • IRVINE • HOUSTON • BOSTON •SACRAMENTO •CULVER CITY «SAN JOSE <br /> NOV 140 <br /> ENVIRON"';-':i4TAL HEALTH <br /> PEM,;i;"I SERVICES <br /> October 31, 1990 <br /> 0806rsis <br /> AGS 38012-4 <br /> Mr. Rick Sick <br /> Unocal Corporation <br /> P.O. Box 5155 <br /> San Ramon, California 94583 <br /> Subject: Letter Report of Quarterly Ground-Water monitoring,Second Quarter 1990, <br /> at Former Unocal Station No. 2859, 1665 Pacific Avenue, Stockton, <br /> California. <br /> Mr. Sisk: <br /> 'Phis report summarizes the results of the second quarter 1990 ground-water monitoring that <br /> Applied GeoSystems conducted with your authorization at former Unocal Station 2859 in <br /> Stockton, California. The site location is shown on the Site Vicinity Map (Plate P-1). The <br /> purpose of quarterly sampling is to monitor changes in concentrations of gasoline <br /> hydrocarbons in the ground water and changes in the ground-water gradient. <br /> The work for this monitoring phase included measuring depths to ground water and <br /> subjectively analyzing ground water in five monitoring wells (wells MW-1 through MW ''), <br /> collecting and analyzing groundwater samples for hydrocarbon constituents,and evaluating <br /> the grour�l-water gradient beneath the site. The locations of the monitoring wells are shown <br /> on the C ,neralized Site Plan (Plate P-2). <br /> Previous Lork <br /> Five soil borings were drilled at the site as part of a subsurf,ce environmental investigation <br /> conducted by J.H. Kleinfelder 8r, Associates (Meinfelder) of Sacramento. California, in <br /> ---Janus 1988:—Results of this investigation indicated-that hydrocarbons_were.present in <br /> underlying the site (Kleinfelder, March 3. 1988, Report No. 24-2081-01). . <br /> Y <br />