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' 61aes Enmonmenlnl Manngement Ijac 3rd Qtr 2005 Groundwater Monitoring Report <br /> 002-70950-06 <br /> U-Haul#709-50 <br /> 2 0 SITE BACKGROUND <br /> 2 1 SITE DESCRIPTION <br /> Amerco/U-Haul owns and occupies the property hand currently uses the site as a U-Haul vehicle and <br /> equipment rental and repair shop The site is situated on a 1 06 acre parcel and includes two single-story <br /> buildings (sharing a common wall) The buildings include a former service station building and garage, <br /> which was added to the original building Site features are shown on Figure 2 <br /> The site was formerly used as a gasoline storage and retail facility According to a 1994 SOTA <br /> Environmental Technology, Inc (SOTA) work plan, the site was used as a gasoline retail facility from <br /> approximately 1950 until 1976 In 1976, the site was listed in the Polk directory as "Stockton Moving <br /> Center" From 1976 until 1990, the site was apparently used as a moving equipment rental facility Since <br /> 1990, U-Haul has used the site in its current capacity <br /> 2 2 DETECTION OF HYDROCARBON RELEASE <br /> ■ According to a 1990 ETS Environmental & Assoc (ETS) report, four underground storage tanks (USTs) <br /> and associated fuel dispensers were removed from the site in 1990 Three of the four UST's included <br /> gasoline and diesel fuel tanks with capacities of 10,000, 8,000, and 6,000 gallons The fourth UST was a <br /> waste-oil tank with a 250 gallon capacity The tanks were orientated approximately east-west and located in <br /> ithe area labeled"Former UST Location" (Figure 2) The tanks were not replaced upon removal According <br /> to ETS, the analytical results from samples collected beneath the former USTs and associated product lines <br /> indicated detectable concentrations of petroleum hydrocarbons in the soil Based on the results of soil <br /> samples collected during the UST removal, the hydrocarbon release areas were concluded to be 1) the UST <br /> area and 2)the product piping areas(Figure 2) <br /> I2 3 GROUNDWATER WELLS AT THE SITE <br /> As requested by the SJCEHD, Blaes Environmental conducted additional site characterization activities <br /> in January 2000 The additional site characterization activities included, in part, the installation of eight <br /> new monitor wells screened across two depth intervals to accommodate the higher groundwater levels <br /> 3 <br />