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• Page 3 December 15, 2002 <br /> Well Top of Casing (TOC) elevations were established to 0 01 FT accuracy and <br /> related to the datum of the surrounding Victor Fine Foods ground water <br /> monitoring program by Daniel K Barber P E <br /> A survey of surrounding wells was initiated with solicitation and gathering of <br /> existing data from the State Department of Water Resources and information <br /> found at the Central Valley regional Water Quality Control Board Field <br /> verification and updating by D K Barber P E staff is in progress <br /> Findings through the September sampling have been summarized and will be <br /> updated following the mid December 2002 expected collection from the now <br /> ' existing six monitoring wells <br /> General Findings to Date <br /> Three soil source areas with diesel contamination have been identified One of the <br /> contamination zones may extend into the adjacent eastern parcel between <br /> already installed MW Nos 5 and 6 although soil contamination was not found and <br /> levels less than 0 3 mg/kg of diesel were found in the groundwater sample <br /> Groundwater contamination at between 50 to 55 FT bgs exists and likely extends <br /> north of the site's property While the leading edge waits to be defined, the <br /> original source underground storage tanks (USTs) is removed, levels are low and <br /> the closest down gradient offsite well is at least 600 FT away Additionally, <br /> residual soil contamination possibly contributing to the contamination has been <br /> identified and removal is anticipated <br /> 1 The site'sg round waterflow, based on current Monitoring Well information is <br /> northward, at a gradient averaging 0 0036 FT/FT declining at an average <br /> bearing of N 27 deg E <br /> The low concentrations of "diesel" petroleum hydrocarbons may reflect natural <br /> attenuation of hydrocarbons released from the adjacent contaminated soil masses <br /> Characterization of mobility and direction of any non-volatile advancing plume at this <br /> site will require additional monitoring Definition of the leading edge will require <br /> additional sampling beyond the plant site's property line or recognition of diminishing <br /> levels with expected attrition and projected plume within a short distance further north <br /> ' of the properly line <br /> Quarterly sampling of the monitoring wells will continue for at least two more quarters <br />