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Arthur Wyatt -5- April 27, 2009 <br /> Claim No. 1088 <br /> • Free-phase product in groundwater has been removed to th'e 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:iexceed water <br /> quality objectives. <br /> !Cr., <br /> • There are no existing water supply wells, surfaceewaters 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-ands-afety oor=t-o future'ben}eficiai-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 /> Kirk arson, P.G. Date Robert Trommer, C.H.G. Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br /> - - - ,- ♦'4 .. Via,:-.5 - . - <br /> California Environmental Protection Agency <br /> �C;Recycled Paper a <br />