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STL Sacramento <br /> Quality Control Definitions <br /> 'R ��'�—ami " sir 15,111,i._°4.£ ' i NOUN' IRT"9cR FAIJ"F;kv.,f <br /> uY <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 /> 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 /> 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 /> Laboratory Control Sample which is spiked with known amounts of representative target <br /> (LCS) analytes and required surrogates. A LCS is carried through the <br /> entire analytical process and is used to monitor the accuracy of the <br /> analytical DrOCeSS 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(MS/MSD) 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 /> recision 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 /> the sample praration and the analytical vrocess. <br /> Source:STL Sacramento Laboratory Quality Manual <br /> STL Sacramento Certifications: <br /> Alaska(UST-055),Arizona(#A700616),Arkansas,California(NELAP#01119CA)OMAP#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#5-46613). <br /> G3H040225 STL Sacramento 916.373.5600 2 of 9 <br />