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Wm. J. Hunter & Associates 2220 Loma Vista Dr. <br /> Registered Geologists Sacramento, CA 95825 <br /> Petroleum & Mineral Appraisers (916) 972-7941 <br /> FAX(916) 972-1683 <br /> INTERIM REPORT COVERING RESULTS <br /> OF SOIL & GROUNDWATER INVESTIGATION <br /> 913 W. FREMONT STREET, STOCKTON, CA <br /> Prepared for <br /> San Joaquin County PHS <br /> Environmental Health Division <br /> by <br /> Wm. J. Hunter & Associates <br /> February, 1996 <br /> PURPOSE OF WORK: <br /> In February, 1988, a 500 gallon UST which had contained gasoline <br /> was removed from the property. A soil sample taken from beneath <br /> the tank site at 13 ' bgl revealed the presence of toluene, <br /> xylene, & petroleum as TVPH. The removed spoil was returned to <br /> the site and no further work was done at that time. <br /> In February & March, 1994, three (3) groundwater monitoring wells <br /> were placed on the property to evaluate the extent of that con- <br /> tamination. The results of that work revealed that both soil & <br /> groundwater had been impacted by the UST, and further investiga- <br /> tive work would be required. <br /> On December 19 & 20 , 1994, the site of the removed UST was <br /> re-excavated in order to remove as much impacted soil as posible . <br /> Refer to WJH report titled "Interim Report Covering Results of <br /> Soil Excavation" dated March, 1995 for details . <br /> Quarterly monitoring and sampling of the three (3) groundwater <br /> monitoring wells placed on the site show that the gradient is to <br /> the north/northeast, and the downgradient well, MW-2, has been <br /> recording significant levels of BTEX & TPH-G since its placement . <br /> Because the lateral extent of soil & groundwater contamination <br /> had not been fully defined, additional work was required by the <br /> San Joaquin County EHD . A workplan was submitted by Wm. J. <br /> Hunter & Associates (WJH) in June, 1995 to place several soil <br /> probes to delineate the plume, and one (1) additional monitoring <br /> well in a downgradient position. Refer to EXHIBIT A for a copy <br /> of that workplan. <br /> PROPERTY LOCATION: <br /> 913 West Fremont Street, Stockton, California. Also referred to <br /> as 921 W. Fremont in prior reports . Refer to PLATES I & II for <br /> . more details . <br /> 1 <br />