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1 <br /> SUMMARY REPORT <br /> SUBSURFACE INVESTIGATION <br /> I at <br /> I FARMER PROPERTY <br /> 610 NORTH HUNTER STREET <br /> STOCKTON, CALIFORNIA <br /> I1.0 INTRODUCTION <br /> This report summarizes procedures and practices utilized by Smith Technology Corporation to <br /> investigate potential soil and groundwater contamination associated with the former underground <br /> storage tanks (USTs) located at 610 North Hunter Street, Stockton, California The investigation <br /> consisted of drilling seven soil borings, installing three groundwater monitoring wells and two <br /> ' vapor extraction wells, and collecting soil and groundwater samples for analysis <br /> I 1_1 Site Locution <br /> The site is located at 610 North Hunter Street, Stockton, California (Figure 1) The area of <br /> lipinvestigation, the former tanks location, is located approximately 10 feet south of the on-site <br /> building, 5 feet west of the property line, and 30 feet north of Oak Street <br /> The site is located on the northeast corner of Oak Street and North Hunter Street The location is <br /> primarily a commercial and residential area The site was formerly occupied by a rental car <br /> agency, but is currently vacant <br /> 1.2. Site Background and Previous Work <br /> On October 6, 1987, A] Williamson, General Contractor, removed two 1,000-gallon leaded <br /> gasoline tanks and one 550-gallon waste oil tank from the locations shown on Figure 2 Sol] <br /> samples collected after the tank removals contained elevated concentrations of petroleum <br /> ' hydrocarbons and volatile organic compounds (VOCs) <br /> On January 21, 1988, Falcon Energy, attempted to remove all VOC and petroleum hydrocarbon <br /> contaminated soil by overexcavating the former tank locations The former tank locations were <br /> excavated to a depth of approximately 22 feet below ground surface (bgs) The excavation was <br /> limited to the north by the on-site building The confirmation samples collected from the base of <br /> the overexcavation still contained elevated concentrations of volatile organics The <br /> overexcavated soil was disposed of at Forward Landfill <br /> r w\977311repoM%\psi do,. l <br /> r � <br /> SNfIH <br />