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r <br /> BMTH <br /> ENVIRONMENTAL TECHNOLOGIES CORPORATION <br /> May 6, 1997 <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 Second Quarter 1997 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 the <br /> second quarter 1997 by Swath Technology Corporation at the subject site (Figure 1) The work <br /> was conducted at the request of the City of Stockton, Department of Public Works (City of <br /> Stockton) and included measuring depths to groundwater, collecting groundwater samples from <br /> the wells for subjective and laboratory analyses, and evaluating the groundwater gradient and <br /> 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 /> " w 194367194367-1012 QSR97doc 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering - Consulting • Remediation Construction <br /> r <br />