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February 23, 2007 Lab ID : STK730850 <br /> Alpine Packing Company Customer : 3-2839 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrate 300.0 01/30/2007:A215 MSD mg/L 400.0 143% 88-124 435 <br /> MSRPD mg/L 15.1% 529.1 <br /> 300.0 01/30/2007:A 00-ICB ppm ND <0.4 <br /> 00-CCB ppm ND <0.4 <br /> 00-ICV ppm 40.00 102% 90-110 <br /> 00-CCV ppm 20.00 98.4% 90-110 <br /> pH 4500-H B 01/29/2007:S346 Dup units 0.3% 0.995 <br /> 4500-H B 01/29/2007:5 00-CCV units 8.000 99.5% 95-105 <br /> Solids. Total Dissolved (TDS) 2540C 02/01/2007:A235 Blank mg/L NO <22.7 <br /> LCS mg/L 1000 992�R. 90-110 <br /> Dup mg/L 3.1 1,7 10.0 <br /> 02/02/2007:A235 Blank mg/L ND <40 <br /> LCS mg/L 1000 1031 90-110 <br /> Dup mg/L 0.3% 10.0 <br /> Explanations <br /> 435 Sample matrix may be affecting this analyte. Data was accepted based on the LCS or CCV recovery. ' <br /> Definitions <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 - .4 random sampleis 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 /> ICB 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 /> NO Non-detect - Result was below the DQO listed for the analyte. <br /> DQO Dam Quality Objective - This is the criteria against which rte quality control data is compared. <br /> STK730850: Quality Control Page 2 <br />