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0 <br /> - i - <br /> SM7H <br /> EN+trRONt1Er1TAL TECHNOtQGlES C4PPORATrQN ` r r ,, <br /> August 29, 1995 <br /> 94-3 67-0 1 0-Tsk 11 <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 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 second 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 borings, 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 /> GROUNDWATER MONITORING <br /> On May 30, 1995, a Smith Environmental technician measured the water levels in wells MW- <br /> 1 through MW-5, well RW-1, and piezometer PZ-1 No floating product was noted in any <br /> site well Groundwater monitoring data are summarized in Table 1 <br /> 38009-1012QSR95doc <br /> 1710 Main Street • Escalon,CA 95320 (209)838-3507 • fax (209)838-3509 <br /> Engtneenng • Consulting Remediation • Construction <br />