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45 <br /> SMTH <br /> ENVIRONMENTAL TECHNOLOGIES CORPORATION <br /> December 26, 1995 <br /> 94-367-010-Tskll <br /> Ms Linda Turkatte <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, CA 952010388 <br /> Subject Third Quarter 1995 Status Report, Fire Engine Company No. 2, 110 West <br /> Sonora Street, Stockton, California <br /> Dear Ms Turkatte• <br /> This letter report summarizes the results of the environmental investigation conducted during <br /> the third quarter 1995 by Smith Environmental Technologies Corporation (Smith <br /> • Environmental) at the subject site (Figure 1). The work was conducted at the request of the <br /> City of Stockton, Department of Public Works (City of Stockton) and included measuring <br /> depths to groundwater, collecting groundwater samples from the wells for subjective and <br /> laboratory analyses, and evaluating the groundwater gradient and direction of groundwater <br /> flow beneath the site <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 waste- <br /> oil tank was removed. The locations of the former and existing tanks are shown on Figure 2 <br /> In 1988, The City of Stockton contracted RESNA Industries Inc to conduct a subsurface <br /> investigation to assess the extent of residual hydrocarbons in soil. The investigation included <br /> drilling seventeen soil bonngs, installing five groundwater monitoring wells, five vapor <br /> extraction wells, one piezometer, and one recovery well, collecting and analyzing soil and <br /> groundwater samples, monitoring fluid levels in the wells, performing a groundwater aquifer <br /> test, and performing a soil vapor extraction test. <br /> 94367194367 1013QS1i95doe 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering Consulting Remediation Construction <br />