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r. <br /> �• App/led GeoSystems •1191-E Power Inn Road, Sicnarnenlo, CA 95826 (916),152-2901 <br /> •FREMONT *IRVINE • HOUSTON a BOSTON •SACRAMENTO •CULVER CITY +SAN JOSE <br /> February 8, 1990 <br /> 041.16JESC <br /> AGS 38009-2 <br /> Mr. James Escobar <br /> p" Department of Public Works <br /> City Hall <br /> Stockton, California 95202-1997 <br /> Subject: Second Addendum to Work Plan for Subsurface Environmental Investigation <br /> at Fire Engine Company No.2, 110 West Sonora Street, Stockton. California. <br /> Mr. Escobar: <br /> At the request of the City of Stockton Department of Public Works, Applied Geo5ystems <br /> is submitting this second work plan addendum to drill five additional soil borings and install <br /> one additional groundwater monitoring well at Fire Engine Company No. 2, 110 West <br /> Sonora Street in Stockton, California. In December 1988, Applied GeoSystems conducted <br /> a subsurface environmental investigation according to Work Plan 38009-1, dated March 9, <br /> 1988,and our Addendum to Work Plan Letter dated November 7, 1988. This work did not <br /> delineate the extent of soil and ground-water contamination. <br /> { The- site is on the southwest corner of Commerce Street and West Sonora Street in <br /> Stockton, California, as shown on the Site Vicinity Map (Plate P-1). Four underground <br /> storage tanks (T-1 through T-4) are on northwest corner of the property, as shown along <br /> with other site characteristics on the Generalized Site Plan (Plate P-2). We understand <br /> from information supplied by the- Department of Public Works, that two of the tanks <br /> contain 550 gallons of diesel, one tank contains 1,000 gallons of leaded gasoline, and one <br /> tank contains 250 gallons of waste oil. <br /> We understand from information supplied by the Department of Public Works,that a 1,000- <br /> gallon tank that stored unleaded gasoline was removed from the site on or before April 1, <br /> W 1987. The tank was removed because a leak of unknown size was discovered during a <br /> precision test. <br /> Iabeled" T-S on Plate`P-1: Results of the <br /> laboratory analyses of one soil sample collected after the tank removal are reported in our <br /> Work Plan 38009-1. <br /> In our December 1988 subsurface environmental investigation,we drilled three soil borings. <br /> NO collected soil samples from the borings, installed three groundwater monitoring wells, <br /> developed the wells, collected groundwater samples, and evaluated the local ground-water <br />