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7 <br /> 63 <br /> ENWROPYAIWTECHNDLOMG CAR TION 0` 1LE <br /> OCT <br /> fI f <br /> ly d, tl 0`6Y�V.J <br /> October 24, 1995 <br /> 94-326 <br /> Ms Mary Meays <br /> San Joaqu.n County Public Health Services <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject Soil Excavation Report <br /> Gardner Property <br /> 26080 Thornton Road, Thornton, California <br /> Site Code 1864 <br /> Dear Ms Meays <br /> This letter report is submitted by Srruth Environmental Technologies Corporation on behalf of <br /> Ms Donna Gardner, to summarize excavation activities conducted at the above referenced site <br /> (Figure 1) The excavation was performed to remove hydrocarbon impacted soil associated with <br /> underground fuel storage tanks formerly located on the subject site <br /> SITE BACKGROUND <br /> On September 6, I989, three underground gasoline storage tanks were removed at the project site <br /> by Western Meter Seance of Stockton, Califorrua Soil samples were collected beneath each tank <br /> and the associated piping Soil samples collected from beneath two of the tanks contained <br /> moderate to lugh levels of ethyl benzene and xylenes (1 2 to 70 parts per million [ppm]) as well as <br /> total petroleum hydrocarbons as gasoline (TPHg), at 470-830 ppm <br /> Due to the presence of elevated concentrations of petroleum hydrocarbons in the tank pit soil <br /> samples, further investigation was required by San Joaquin County Public Health Services, <br /> Environmental Health Division (PHS/EHD) <br /> In a two-phased approach beginning on November 1, 1990, RESNA Industries, Inc (RESNA) <br /> personnel advanced six soil bonngs (MW1-MW6) to depths ranging from 27 to 30 feet below <br /> grade at the project site to accomplish the following 1) define the lateral and vertical extent of <br /> hydrocarbon impacted soils, 2) determine soil stratigraphy, and 3) install groundwater monitoring <br /> 1500811SXR-0995 DOC <br /> 1710 Main Street • Escaion,CA 95320 (209)838-3507 • fax (209) 838-3509 <br /> Engineenng Consulting Remediation - COnstruct20n <br />