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l <br /> Working To Restore Nature <br /> 3164 Gold Camp Drive ,P'n h Tap,a <br /> Rancho Cordova, CA 95670 -�� W, .r <br /> Phone (916)852-6690 <br /> Fax (916) 852-6688 DEC ) 4 1992 <br /> ENVIRONMENTAL HEALTH <br /> PERM ITISERVICLES <br /> December 8, 1992 <br /> Mr James Escobar <br /> Department of Public Works <br /> City Hall <br /> Stockton, California 95202-1997 <br /> Subject. Status Report,Environmental Investigation, Fourth Quarter 1992, Fire Engine <br /> Company No 2, 110 West Sonora Street, Stockton, California <br /> Mr Escobar <br /> This letter report summarizes the results of the environmental investigation conducted <br /> during the fourth quarter 199 by RESNA Industries (RESNA) at the subject site (shown <br /> on Plate 1) The work was conducted at the request of the City of Stockton Department <br /> of Public Works (City of Stockton) and included measuring depths to ground water, <br /> collecting ground-water samples from the wells for subjective and laboratory analyses, and <br /> evaluating the ground-water gradient and direction of ground-water flow beneath the site <br /> This report also summarizes the drilling of five soil borings and the installation of three <br /> vapor-extraction wells, one recovery well, and one piezometer in August and September <br /> 1992 <br /> BACKGROUND <br /> In April 1987, a 1,000-gallon unleaded gasoline tank was removed and residual hydrocarbons <br /> were detected in the soil remaining under the former tank In April 1992, a 250-gallon <br /> waste-oil tank was removed The locations of the former and existing tanks are shown on <br /> Plate 2 In 1988, The City of Stockton contracted RESNA (formerly Applied Geosystems) <br /> to conduct a subsurface investigation to assess the extent of residual hydrocarbons in soil <br /> The investigation work performed at the site between 1988 and 1990 included drilling eight <br /> soil borings, installing four groundwater monitoring wells, and collecting and analyzing soil <br /> and water samples for hydrocarbons (Applied GeoSystems, November 20, 1990, Problem <br /> Assessment Report No 38009-2) <br /> i� i <br /> 38o�-a 009-4 <br />