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March 01 2006 Lab ID STK631651 <br /> Luhdorff & Scahnanini, Consulting Eng. Customer : 3-12023 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Total Dissolved Solids 2540C 02/24/2006:8235 Dup mg/L 0.80 10.0 <br /> Explanations . <br /> 360 CCV above Acceptance Range (Alt). Samples which were non detect for this analyte were accepted. <br /> 408 Matrix Spike(MS) or Post Digestion Spike(PDS) has no Acceptance Range (DQO) because of high analyte <br /> concentration in the sample. Data was accepted based on the LCS or CCV recovery. <br /> 435 Sample matrix may be affecting this analyte. Data,was accepted based on the LCS or CCV recovery. <br /> Deruddons <br /> Blank Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> LCS Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte <br /> recovery. <br /> MS/MSD Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication o <br /> how that sample matrix affects analyte recovery. <br /> Dup : Duplicate Sample - A random sample with each batch is prepared and analyzed in duplicate. The relative percent <br /> difference is an indication of precision for the preparation and analysis. <br /> 1Ca :. Initial Calibration Blank -. Analyzed to,verify the instrument baseline is within criteria. <br /> ICV Initial Calibration Verification Analyzed to verify the instrument calibration is within criteria. <br /> CCB Continuing Calibration Blank Analyzed to verify the instrument baseline is within criteria. <br /> CCV Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br /> NII Non-detect - Result was below the DQO listed,for the analyte. <br /> <'A High Sample Background - Spike concentration was less than one forth of the"sample concentration. <br /> DQO Data Quality Objective - This is the :criteria against which the quality control data is compared. <br /> STK631651: Quality Control Page 4 <br />