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M <br /> 1�k ACCO <br /> TestTestAmerica ,� <br /> 1,4 �4C, <br /> z <br /> U <br /> THE LEADER IN FNVIRQNMFNTAI TESTING U <br /> e <br /> TestAmerica Laboratories West Sacramento Certifications/Accreditations <br /> Certifying State Certifying Stat" Certificate 4 <br /> Alaska UST-055 New York* 11666 <br /> Arizona AZ0616 Oregon* CA 200005 <br /> Arkansas 04-067-0 Pennsylvania 68-1272 <br /> California* 01119CA South Carolina 87014002 <br /> Colorado NA Texas TX 270-2004A <br /> Connecticut PH-0691 Utah* QUANI <br /> Florida* E87570 Virginia 00178 <br /> Georgia 960 Washington C087 <br /> Hawaii NA West Virginia 9930C,334 <br /> Kansas* E10375 Wisconsin 998204680 <br /> Louisiana* 01944 NFESC NA <br /> Michigan 9947 USACE NA <br /> Nevada CA44 USDA Foreign Plant 37-82605 <br /> New Jersey* CA005 USDA Foreign Soil S-46613 <br /> *NELAP accredited. A more detailed parameter list is available upon request.Updated 9/21/07 <br /> QC Parameter Definitions <br /> QC Batch: The QC batch consists of a set of up to 20 field samples that behave similarly(i.e.,same matrix) <br /> and are processed using the same procedures,reagents,and standards at the same time. <br /> Method Blank: An analytical control consisting of all reagents,which may include internal standards and <br /> surrogates,and is carried through the entire analytical procedure. The method blank is used to define the level <br /> of laboratory background contamination. <br /> Laboratory Control Sample and Laboratory Control Sample Duplicate(LCS/LCSD): <br /> An aliquot of blank matrix spiked with known amounts of representative target analytes. The LCS(and LCSD <br /> as required)is carried through the entire analytical process and is used to monitor the accuracy of the analytical <br /> process independent of potential matrix effects. If an LCSD is performed,it may also be used to evaluate the <br /> precision of the process. <br /> Duplicate Sample(Di ): Different aliquots of the same sample are analyzed to evaluate the precision of an <br /> analysis. <br /> Surrogates: Organic compounds not expected to be detected in field samples,which behave similarly to <br /> target analytes. These are added to every sample within a batch at a known concentration to determine the <br /> efficiency of the sample preparation and analytical process. <br /> Matrix Spike and Matrix Spike Duplicate(MS/MSD): An MS is an aliquot of a matrix fortified <br /> with known quantities of specific compounds and subjected to an entire analytical procedure in order to indicate <br /> the appropriateness of the method for a particular matrix. The percent recovery for the respective compound(s) <br /> is then calculated. The MSD is a second aliquot of the same matrix as the matrix spike,also spiked,in order to <br /> determine the precision of the method. <br /> Isotope Dilution: For isotope dilution methods,isotopically labeled analogs(internal standards)of the <br /> native target analytes are spiked into the sample at time of extraction. These internal standards are used for <br /> quantitation,and monitor and correct for matrix effects. Since matrix effects on method performance can be <br /> judged by the recovery of these analogs,there is little added benefit of performing MS/MSD for these methods. <br /> MS/MSD are only performed for client or QAPP requirements. <br /> Control Limits: The reported control limits are either based on laboratory historical data,method <br /> requirements,or project data quality objectives. The control limits represent the estimated uncertainty of the test <br /> results. <br /> G8i050366 TestAmerica West Sacramento(916)373-5600 4 of 31 <br />