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- I <br /> i 4 <br /> Arthur Wyatt -5- April 27, 2009 <br /> Claim No. 1088 <br /> • Free-phase product in groundwater has been removed to the full extent <br /> practicable, in accordance with .the UST Regulations (Title 23, CCR, <br /> Section 2655). <br /> • Contaminants remaining in the vadose zone cannot migrate in soil vapor , <br /> or leach at concentrations that would cause groundwater to exceed water <br /> quality objectives. <br /> r <br /> • There are no existing water supply wells, surface waters or other <br /> receptors threatened by the remaining contaminants in soil or <br /> groundwater. <br /> • Pollutants remaining.in groundwater do not create or threaten to create <br /> risk to human health and safety, or to future beneficial use(s) of the <br /> groundwater. - <br /> • The plume size is stable and sufficiently delineated in lateral and vertical <br /> extent and contaminant concentrations detected in groundwater show a <br /> decreasing trend with time. <br /> • There are no current or anticipated uses of the impacted groundwater <br /> within the timeframe projected to meet water quality objectives. <br /> -In summary, the remaining mass of hydrocarbons in soil and groundwater is <br /> minor, the extent of contamination is defined, the groundwater-plume is shrinking, <br /> and Water Quality Objectives will be achieved in a few years. <br /> 5�' <br /> Kirk tarson, P.G. Date Robert Tromrmer, C.H.G. Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br /> ISI I <br /> California Environmental Protection Agency <br /> I'� �a R wyded Paper <br />