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TestAmedca <br /> THE LEADER IN EN V IR O NM ENTAL TESTING 17461 Derian Avenue.Suite 100, Irvine,CA 92614(949)261-1022 Fax:(949)260-3297 <br /> Arcadis-Folsom Project ID: Storrie Derailment <br /> 950 Glenn Drive,Suite 125 Sampled: 01/17/11 <br /> Folsom,CA 95630 ReportNumber: IUA1672 Received: 01/19/11 <br /> Attention: Danielle Catlin-Wright <br /> DATA QUALIFIERS AND DEFINITIONS <br /> B Estimated result. Result is less than RL and greater than or equal to the IDL. <br /> J Estimated value. Analyte detected at a level less than the Reporting Limit(RL)and greater than or equal to the <br /> Method Detection Limit(MDL).The user of this data should be aware that this data is of limited reliability. <br /> Ja Method blank contamination. The associated method blank contains the target analyte at a reportable level. <br /> M-3 Results exceeded the linear range in the MS/MSD and therefore are not available for reporting. The batch was <br /> accepted based on acceptable recovery in the Blank Spike(LCS). <br /> N Spike sample recovery is outside control limits. <br /> P-HS Sample container contained headspace. <br /> R The RPD exceeded the method control limit due to sample matrix effects. The individual analyte QA/QC recoveries, <br /> however,were within acceptance limits. <br /> R-4 Due to the low levels of analyte in the sample,the duplicate RPD calculation does not provide useful information. <br /> Z2 Surrogate recovery was above the acceptance limits. Data not impacted. <br /> ND Analyte NOT DETECTED at or above the reporting limit or MDL,if MDL is specified. <br /> RPD Relative Percent Difference <br /> ADDITIONAL COMMENTS <br /> For 8260 analyses: <br /> Due to the high water solubility of alcohols and ketones,the calibration criteria for these compounds is<30%RSD. <br /> The average%RSD of all compounds in the calibration is 15%,in accordance with EPA methods. <br /> For GRO(C4-C12): <br /> GRO(C4-C12)is quantitated against a gasoline standard. Quantitation begins immediately following the methanol peak. <br /> TestAmerica Irvine <br /> Heather Clark <br /> Project Manager <br /> The results pertain only to the samples tested in the laboratory. This report shall not be reproduced, <br /> except in full,without written permission from TestAmerica. IUA1672 <Page 110 of 112> <br />