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AhLt?FSMTH <br /> ENVIRONMENTAL TECHNOLOGIES CORPORATION , <br /> i <br /> September 6, 1996 <br /> 94367 <br /> Ms Linda Turkatte <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject Third Quarter 1996 Status Report, Fire Engine Company No 2, 110 West Sonora <br /> Street, Stockton, California <br /> Dear Ms Turkatte <br /> This letter report summarizes the results of the environmental investigation conducted during the <br /> third quarter 1996 by Smith Environmental Technologies Corporation at the subject site (Figure <br /> 1) The work was conducted at the request of the City of Stockton, Department of Public Works <br /> (City of Stockton) and included measuring depths to groundwater, collecting groundwater <br /> samples from the wells for subjective and laboratory analyses, and evaluating the groundwater <br /> gradient and direction of groundwater 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 oil <br /> tank was removed The locations of the former and existing tanks are shown on Figure 2 In <br /> 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 borings, installing five groundwater monitoring wells, five vapor extraction <br /> wells, one piezometer, and one recovery well, collecting and analyzing soil and groundwater <br /> samples, monitoring fluid levels in the wells, performing a groundwater aquifer test, and <br /> performing a soil vapor extraction test <br /> Z <br /> w 194367194367-10\3QS"6doc 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering . Consulting • Remediation Construction <br />