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December 12, 2006 Lab ID STK639671 <br /> Alpine Packing Company Customer : 3-2839 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ED Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrate + Nitrite as N 450ONO3F I1/30/2006:A220 MSD mg/L 4.000 133% <to 408 <br /> MSRPD mg/L 26.0% 535.0 <br /> 450ONO3F 12/04/2006:A 00-ICB mg/1 ND <0.1 <br /> 00-CCB mg/1 ND <0.1 <br /> 00-ICV mg/I 4.000 102% 90-110 <br /> 00-CCV mg/I 4.000 102% 90-110 <br /> pH 4500-H B I1/10/2006:S346 Dup units 0.0% 4.80 <br /> 4500-H B I1/10/2006:S 00-CCV units 8.000 100% 95-105 <br /> Solids, Total Dissolved (TDS) 2540C 11/15/2006:A235 Blank mg/L ND <40 <br /> LCS mg/L 1000 98.4% 90-110 <br /> Dup mg/L 0.1% 10.0 <br /> Explanations <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 /> i <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 - 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. v <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 /> ND 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 /> STK639671: Quality Control Page 2 <br />