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Noxi 1 <br /> CS LTD. <br /> Laborarory Services Since 1969 <br /> LABORATORY NARRATIVE <br /> EPA Method TO-15 <br /> GeoSyntec Consultants <br /> Workorder# 1102109 <br /> Twelve 1 Liter Summa Canister (100% Certified) samples were received on February 04, 2011. The ' <br /> laboratory performed analysis via modified EPA Method TO-15 using GUMS in the full scan mode. <br /> This workorder was independently validated prior to submittal using 'USEPA National Functional <br /> Guidelines' as generally applied to the analysis of volatile organic compounds in air. A rules-based, logic <br /> driven, independent validation engine was employed to assess completeness, evaluate pass/fail of relevant <br /> project quality control requirements and verification of all quantified amounts. <br /> Receiving Notes <br /> There were no receiving discrepancies. <br /> Analytical Notes <br /> Dilution was performed on samples SGP-4, SSP-4, SGP-5, SSP-6 and SGP-6 due to the presence of high <br /> level non-target species. <br /> Dilution was performed on samples SSP-3, SGP-3, SSP-2, SGP-2 and DUP-01 due to the presence of ' <br /> high level target species. <br /> The recovery of surrogate 1,2-Dichloroethane-d4 in samples SGP-4 and SSP-4 was outside control limits <br /> due to high level hydrocarbon matrix interference. Data is reported as qualified. <br /> Definition of Data Oualifving Flags <br /> Eight qualifiers may have been used on the data analysis sheets and indicates as follows: <br /> B - Compound present in laboratory blank greater than reporting limit(background subtraction not <br /> performed). <br /> J - Estimated value. <br /> E-Exceeds instrument calibration range. <br /> S - Saturated peak. <br /> Q -Exceeds quality control limits. <br /> U - Compound analyzed for but not detected above the reporting limit. ' <br /> UJ- Non-detected compound associated with low bias in the CCV and/or LCS. <br /> N -The identification is based on presumptive evidence. <br /> File extensions may have been used on the data analysis sheets and indicates <br /> as follows: <br /> a-File was requantified <br /> b-File was quantified by a second column and detector <br /> rl-File was requantified for the purpose of reissue <br /> Page 4 of 65 <br />