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ACZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs,CO 80487 (800)334-5493 <br /> Report .• Explanations <br /> Batch A distinct set of samples analyzed at a specific time <br /> Error(+/-) Calculated sample specific uncertainty <br /> Found Value of the QC Type of interest <br /> Limit Upper limit for RPD,in% <br /> LCL Lower Control Limit,in% (except for LCSS,mg/Kg) <br /> LLD Calculated sample specific Lower Limit of Detection <br /> PCN/SCN A number assigned to reagents/standards to trace to the manufacturer's certificate of analysis <br /> PQL Practical Quantitation Limit <br /> QC True Value of the Control Sample or the amount added to the Spike <br /> Rec Amount of the true value or spike added recovered,in%(except for LCSS,mg/Kg) <br /> RER Relative Error Ratio,calculation used for Dup.QC taking into account the error factor <br /> RPD Relative Percent Difference,calculation used for Duplicate QC Types <br /> UCL Upper Control Limit,in% (except for LCSS,mg/Kg) <br /> Sample Value of the Sample of interest <br /> QC Sample Types <br /> DUP Sample Duplicate MS/MSD Matrix Spike/Matrix Spike Duplicate <br /> LCSS Laboratory Control Sample-Soil PBS Prep Blank-Soil <br /> LCSW Laboratory Control Sample-Water PBW Prep Blank-Water <br /> ExplanationsQC Sample Type <br /> Blanks Verifies that there is no or minimal contamination in the prep method procedure <br /> Control Samples Verifies the accuracy of the method,including the prep procedure <br /> Duplicates Verifies the precision of the instrument and/or method. <br /> Matrix Spikes Determines sample matrix interferences,if any <br /> ACZ Qualifiers e . <br /> H Analysis exceeded method hold time. <br /> 'Method„ Prefix <br /> M EPA methodology,including those under SDWA,CWA,and RCRA <br /> SM Standard Methods for the Examination of Water and Wastewater <br /> D ASTM <br /> RP DOE <br /> ESM DOE/ESM <br /> • (1) Solid matrices are reported on a dry weight basis. <br /> (2) Preparation method "Method" indicates preparation defined in analytical method <br /> (3) QC results calculated from raw data. Results may vary slightly if the rounded values are used in the calculations <br /> (4) An asterisk in the"XQ"column indicates there is an extended qualifier and/or certification <br /> qualifier associated with the result <br /> For a complete list of ACZ's Extended Qualifiers,please click. <br /> https://acz.com/wp-content/uploads/2019/04/Ext-Oual-List.pdf <br /> REP003 09.12 01 <br /> L68577-21 1 1 1 61 058 Page 14 of 21 <br />