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S'I1L <br />L Sacramento Certifications/Acereditations <br />1N ACCCR�4 <br />Certifying Statc <br />Certificate # <br />- <br />1 <br />Certifying Sttttc <br />� •.� <br />Ccltificate # <br />1111 <br />�'_`' <br />/ <br />1� 1• 1 <br />• ° i. <br />ijEfl1 <br />. �&$�y� , :•g. .,,, ,� <br />..�.>. -tr _ .yam° ~�?� <br />� cam•• <br />.� <br />t l'v.�..' ' -y� <br />��`1f 111 ai'�' j <br />, g ° - •rr�. <br />:c ' '��` ��i_'r <br />E.li�b�6 R�i�E�. <br />Y•aa-^= -'v."V�.c'i <br />2 We re <br />'-.."�! �T�ki^•.�Lp�i.^ate° <br />• 1.'�'i�'4y.. <br />N� <br />��y-j"tii�:p" � � ';.r,,��' <br />'• r"�' `t�6'.`f� w ° <br />.'�-•^r�"��py�.. 7.`z.Y�^' <br />New Jersey* <br />.• <br />}.M• •�'i°Gj�'a°�'��kg <br />y's+• <br />r uv <br />2 �tii�IHLl.l8ilvi71 s;..3�>....aGE'��' <br />? } �j ry a s•_ <br />•�c� <br />m vin y a rM <br />r r <br />G5C070225 <br />NhLAY accredited. Amo detailed parameter list is available upon request. Update 1/27/05 <br />QC Parameter Definitions <br />QC Batch: The QC bah consists of a set of up to 20 field samples that behave similarly (i.e., same matrix) <br />and are processed using a same procedures, reagents, and standards at the same time. <br />Method Blank: An ai kalytical control consisting of all reagents, which may include internal standards and <br />surrogates, and is carried brough the entire analytical procedure. The method blank is used to define the level <br />of laboratory backgroundcontamination. <br />Laboratory Control ample 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 <br />analytical process indepe dent of potential matrix effects. If an LCSD is performed, it may also used to <br />evaluate the precision of t ie process. <br />Duplicate Sample: Different aliquots of the same sample are analyzed to evaluate the precision of <br />an 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'pecific compounds and subjected to an entire analytical procedure in order to <br />indicate the appropriateness of the method for a particular matrix. The percent recovery for the respective <br />compound(s) is then calculated. The MSD is a second aliquot of the same matrix as the matrix spike, also <br />spiked, in order to 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 piked 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 hese analogs, there is little added benefit of performing MS/MSD for these methods. <br />MS/MSD are only perfort ied 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 <br />test results. <br />STL Sacramento (916) 373 - 5600 <br />3of67 <br />