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STL Sacramento <br /> Quality Control Def nitions <br /> 1,1 0 MEI <br /> 111- <br /> A set of up to 20 field samples plus associated laboratory QC <br /> QC Batch. samples that are similar in composition(matrix)and that are <br /> processed within the same time period with the same reagent and <br /> r r standard lots. <br /> Consist of a pair of LCSs analyzed within the same QC batch to <br /> Duplicate Control Sample monitor precision and accuracy independent of sample matrix <br /> (DCS) effects. This QC is performed only if required by client or when <br /> `.> insufficient sample is available to perform MS/MSD. <br /> A second aliquot of an environmental sample,taken from the same <br /> -;' sample container when possible,that is processed independently <br /> with the first sample aliquot_ The results are used to assess the <br /> Duplicate Sample(DU) effect of the sample matrix on the precision of the analytical <br /> process. The precision estimated using this sample is not <br /> F <br /> necessarily representative of the precision for other samples in the <br /> batch. <br /> A volume of reagent water for aqueous samples or a contaminant- <br /> free solid matrix(Ottawa sand)for soil and sediment samples <br /> which is spiked with known amounts of representative target <br /> Laboratory Control Sample P P g <br /> (LCS) analytes and required surrogates. An LCS is carried through the <br /> entire analytical process and is used to monitor the accuracy of the <br /> _:r;; analytical process independent of potential matrix effects. <br /> ' A field sample fortified with known quantities of target analytes <br /> that are also added to the LCS. Matrix spike duplicate is a second <br /> `- Matrix Spike and Matrix Spike matrix spike sample. MSs/MSDs are carried through the entire <br /> Duplicate(M$IMSD) analytical process and are used to determine sample matrix effect <br /> on accuracy of the measurement system.The accuracy and <br /> precision estimated using MS/MSD is only representative of the <br /> F? precision of the sample that was spiked. <br /> A sample composed of all the reagents(in the same quantities)in <br /> reagent water carried through the entire analytical process. The <br /> -:' Method Blank(MB) method blank is used to monitor the level of contamination <br /> introduced during sample preparation steps. <br /> Organic constituents not expected to be detected in environmental <br /> media and are added to every sample and QC at a known <br /> Surrogate Spike concentration. Surrogates are used to determine the efficiency of <br /> =l the.sample preparation and the analytical process. <br /> r- Source:STL Sacramento Laboratory Quality Manual <br /> STL Sacramento Certifications: <br /> Alaska(UST-055),Arizona(#AZ00616),Arkansas,California(NELAP#01119CA)(ELAP#1-2439), <br /> Connecticut(#PH-0691),Florida(E87570),Hawaii,Louisiana(Al#30612),New Jersey(Lab ID 44005), <br /> Nevada(#CA 044),New York(LAB ID 11666 serial# 107407),Oregon(LAB ID CA 044),South Carolina <br /> (LAB ID 87014,Cert.#870140),Utah(E-168),Virginia.(#00178),Washington(#C087),West Virginia(# <br /> 9930C),Wisconsin(Lab 998204680),USNAVY;USACE,USDA Foreign Plant(Permit#37-82605),USDA <br /> Foreign Soil(Permit#S-46613)., <br /> fir_ G3F250207 STL Sacramento 946-373-5600 2 of 45 <br />