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Geo(ag�-c a(T-cfrn--'Inc- � 2 <br /> McGranahan(Gawne Rd.) 1, <br /> Project No.; 2513 <br /> January 26, 1998 <br /> 3. volume of soil contaminated by the chemicals <br /> 4. contaminant concentrations <br /> 5. soil pore vapor contaminant concentration <br /> 6. unit conversion <br /> f <br /> We now believe the actual number was closer to 200 gallons with a possible factor of 2x that <br /> amount. This means that since the vapor extraction system has removed approximately 85 <br /> gallons, or 45% of the estimated volume of gasoline, which allows us .to accelerate <br /> recommendation for closure of this site. <br /> With the new information, along with the remedial work to date, we now know that removal of ' <br /> the risk to human health and the environment should be complete.. Therefore we can safely make <br /> the following recommendations: <br /> 1. The VETS system should be shutdown permanently. <br /> 2. A final report will be submitted outlining the work and test results. <br /> �. The site should then be considered for a low risk closure. <br /> Respectfully, <br /> GEOLOGICAL TECHNICS INC. <br /> Raynold I. Kablanow II, Ph.D. <br /> RG/HGREA <br /> cc: Ron Rowe - SJC PHS/EHD <br /> Diane Bufalacchi - SJVUAPCD <br /> USTCFP <br /> 8=i°�^"'9�"zstua.SUlzstmgmGr9str.Cac - - . <br /> 4 <br />