Laserfiche WebLink
0 <br />[i <br />0 <br />LI <br />u <br />n <br />L' <br />I <br />—11 <br />IL <br />I <br />L <br />0 <br />CJ <br />GAWAF <br />?; lE <br />AN ENVIRONMENTAL ANALYTICAL LABORATORY <br />LABORATORY NARRATIVE <br />Modified TO -14A <br />SCS Field Services <br />Workorer# 0802068 <br />Thirteen 1 Liter Summa Canister samples were received on February 04, 2008. The laboratory performed <br />analysis via modified EPA Method TO -14A using GC/MS in the full scan mode. The method involves <br />concentrating up to 0.2 liters of air. The concentrated aliquot is then flash vaporized and swept through a <br />water management system to remove water vapor. Following dehumidification, the sample passes directly <br />into the GUMS for analysis. <br />This workorder was independently validated prior to submittal using'USEPA National Functional Guidelines' <br />as generally applied to the analysis of volatile organic compounds in air. A rules -based, logic driven, <br />independent validation engine was employed to assess completeness, evaluate pass/fail of relevant project <br />quality control requirements and verification of all quantified amounts. <br />Method modifications taken to run these samples are summarized in the table below. Specific project <br />reauirements may over -ride the ATL modifications. <br />Requirement <br />TO -14A <br />ATL Modifications <br />Daily CCV <br />+- 30% Difference <br /></= 30% Difference with two allowed out up to </=40%.; <br />flag and narrate outliers <br />Initial Calibration criteria <br />RSD<30% <br />RSD</=30%, two compounds allowed up to 40% <br />BFB absolute abundance criteria <br />Within 10% of that <br />from previous day <br />CCV internal standard area counts are compared to ICAL, <br />corrective action for > 40% D <br />Blank acceptance criteria <br /><0.20 ppbv <br /><Reporting Limit <br />Moisture control <br />Nafion Dryer <br />Multisorbent trap <br />Sample collection media <br />Summa canister <br />ATL recommends use of summa canisters to insure data <br />defensibility, but will report results from Tedlar bags at <br />client request <br />Receiving Notes <br />There were no receiving discrepancies. <br />Analytical Notes <br />All Quality Control Limit failures and affected sample results are noted by flags. Each flag is defined at the <br />bottom of this Case Narrative and on each Sample Result Summary page. <br />Definition of Data QualifyinjZ Flal4s <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 nol <br />performed). <br />J - Estimated value. <br />Page 3 of 49 <br />