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SOIL GAS VALIDATION INFORMATION <br /> Air Toxics Work Number: 08-07311 <br /> Sample: A3-SGI and A3-SG1D <br /> Collection Date: July 16, 2008 <br /> Volatile Organic Compounds EPA TO-15 <br /> Holding Times <br /> The holding time for this method is 28 days. Samples were analyzed within this time <br /> period and met the criteria. <br /> Method Blanks <br /> Method blanks were analyzed with the samples. The blanks were contaminant free. <br /> Sensitivity <br /> No dilutions were necessary. The target RL were met. <br /> Surrogate Spike Recovery <br /> The surrogate percent recoveries were within the control limits. <br /> Laboratory Control Sample <br /> The LCS for sample analyzed on July28 and the LCS for the samples on July 29 were <br /> within the percent recoveries provided. <br /> Continuous Concentration Verification (CCV) <br /> The CCVs reported with the samples were within the percent recoveries. <br /> Duplicate Samples <br /> The analysis of the duplicate results were within 20%. <br /> 21 <br />