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SOIL GAS VALIDATION INFORMATION <br /> Air Toxics Work Number: 09-04384 <br /> Sample: A3-SG4 and A3-SG4D <br /> Collection Date: April 16, 2009 <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 LC for sample analyzed on April 21. <br /> Continuous Concentration Verification (CCV) <br /> The CCVs reported with the samples were within the percent recoveries except <br /> Bromomethane. <br /> Duplicate Samples <br /> The analysis of the duplicate results were within 20%. <br /> 22 <br />