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IVEk REVISED SOIL INVESTIGATION PROPOSAL NOV 2 ) EI1 VIf�C-NI1/MEN T AL Hl-�CwTH 107 NORTH SCHOOL STREET PEFIM111T LODI, CALIFORNIA 95258 PREPARED BY CONDOR EARTH TECHNOLOGIES, INC. October 23, 1989 Introduction The site to be investigated is located at 107 N. School St. at the intersection of N. School and Elm St. in Lodi, CA (Figure 1) . The property is owned by Richard Novone, P.0 Box Q, Woodbridge, CA 95258 . This submittal contains a proposal to confirm that soil excavation procedures have removed all soil contamination associated with the presence of two underground storage tanks. Discussion On September 21, 1987 four underground fuel tanks were removed from the property. Removed were: one 2,000 gallon unleaded gasoline tank; one 250 gallon used-oil tank; and two 500 gallon leaded gasoline tanks . A 55 gallon drum containing used-oil was also removed from the site. The locations of the tanks and the drum are shown on Figure 2. An area approximately 40 feet by 40 feet by 22 feet deep was excavated to remove contaminated soil resulting from leaks from one of the tanks . The excavation was done by Warren E. Gomes Excavating, Inc. of Rio Vista, California on February 23, 1989 . Excavation was centered in the area of the two 500 gallon fuel tanks (Figure 2) . The excavated material was left on site and covered with Visqueen. After reviewing the sampling results from the tank pull and the excavation procedures, San Joaquin County Environmental Health Officials requested that confirmation samples from the base of the excavation be obtained. i Condor proposes to install three soil borings in the former excavation and two borings outside the limits of the excavation as shown on Figure 2 to confirm that the excavation is adequate. The borings will be drilled to a depth of 23 feet with a 7 .75-inch O.D.