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3 <br /> 1 4M <br /> s <br /> w Y <br /> var <br />�CPo <br /> WEISS ASSOCIATES Consulting in Geology S Geohydrology <br /> 293$McClure Street, Oakland,CA 94609 4I5-465-1100 <br /> 29 May 1987 <br /> Jank Fiori <br /> San Joaquin Mosquito Abatement <br /> 5503 South Airport Way <br /> Stockton, CA 95206 <br /> Re: Ground Water Investigation <br /> Lodi Facility <br /> WA Job No. 33-229 <br /> Dear Mr. Fiori: <br /> As you r9quested, Weiss Associates (WA) has further reviewed the data <br /> presented in our 27 May report and formulated recommendatlons for your <br /> consideration. The basic conclusions dry m from our investigation are: <br /> 1) Hydrocarbons were found in soil below the gasoline tank down to 31.5 <br /> feet. <br /> 2) Total fuel hydrocarbons (TFHC) and benzene, toluene and xylenes (BTX) <br /> were below detection limits in soils collected from the six borings <br /> around the tank. <br /> 3) TFHC and BTX were below detection limits in water collected from the <br /> three ground water monitoring wells. <br /> 4) At approximately 30 to 32 feet below grade there is a lower <br /> permeability layer which may retard the hydrocarbons' vertical <br /> movement. <br /> t <br /> Our recommendations at this time are to: <br /> A Division of AgaaTierra Associates Incorporated <br />