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ENVIROI`MENTAL <br /> May i %YTICAL CHEMISTS Lab ID STK432422 <br /> Clark Well Inc. Customer : 3-2343 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Nitrate - 300.0 04/13/2004:B215 LCS mg/L 20.00 93.6% 90-110 <br /> MS mg/L 400.0 95.5% 94-Ill <br /> (VI 440619-02) MSD mg/L 400.0 W5% 94-111 <br /> MSRPD mg/L 0.0% 52.71 <br /> 300-0 04/13/2004:A 03-CCB mg/L ND <0.4 <br /> 03-CCV mg/L 20.00 94.0% 90-110 <br /> 04-CCB mg/L ND <0.4 <br /> 04-CCV I mg/L 1 20.00 1 95.8% 90-110 <br /> Deflnitiotss <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 recovencs are an indication o <br /> how that sample matrix affects analyte recovery. <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 /> DQa, Data Quality Objective - This is the criteria against which the quality control data is compared. <br /> Report continued on next page... <br /> S�vnz�A". n-�ntlir nnntrnl o..gI <br /> Corporate Offlcei&Laboratory Office&Laboratory Field Office <br /> P.O.Box 272/853 Corporation Street 2500 Stagecoach Road Visalia,Califomia <br /> Santa Paula.CA 93061-0272 Stockton,CA 95215 TEL (559)734-9473 <br /> TEL (805)392-2000 TEL (209)942-0181 FAX (559)734-8435 <br /> FAX (805)525<172 FAX: (209)942-0423 Mobile: (559)737-2399 <br /> CANELAPCertiBeation No.01110CA CA ELAP Cartiliwaon No. 1563 <br /> CA FLAP Certiflratloo N. 1571 <br />