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' v ,--March 24, 2008 <br /> _ <br /> Teichert and Son , <br /> Claim No. 51' , <br /> The source of the UST release has been identified ,and,removed. <br /> Free-phase product in groundwater has been remo4ed to the full extent <br /> practicable, in accordance with the UST,Regulations (Title 23, CCR, <br /> i <br /> Section 2655). <br /> • Contaminants remaining in the vadose zor+a cannot migrate in soil vapor <br /> or leach at concentrations that would cause groundwaterrto exceed water <br /> quality objectives. <br /> There are no existing water supply wells, surface waters or other <br /> receptors threatened by the remaining contaminants soil'or <br /> p in m <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 /> In summary, the remaining mass of hydrocarbons in soil and groundwater is minor, the <br /> extent of contamination is defined, the groundwater plume is shrinking, and,Water <br /> Quality Objectives will be achieved in a few years. ' <br /> Kirk Larson, 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 /> ~. ♦ 5 • J r a <br /> _ California Eof ronmeata/Protection Agency <br /> �.�Recycled Paper <br />