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ENVIRONMENTAL <br /> Analytical Chemists <br /> March 5, 2013 Lab ID : STK1331633 <br /> Vincent Lucchesi Customer : 3-17102 <br /> I` <br /> Quality Control - Inorganic <br /> Constituent Method Date/m Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Nitrate as 450ONO3F MS mg/L 4.000 88.4% 5-285 <br /> (STK1331572-001) MSD mg/L 4.000 92.2% 5-285 <br /> MSRPD m 4.000 2.7% S30.4 <br /> 450ONO3F 02/27113:202834AMB CCB mg/L -0.0004 0.1 <br /> CCV mg/L 4.000 96.7% 90-110 <br /> CCB mg/L -0.039 0.1 <br /> CCV m 4.000 93.7% 90-110 <br /> Definition <br /> CCV :Continuing 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 /> MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries arc an indication of how that sample <br /> matrix affects=style recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries <br /> are an indication of how that sample matrix affects analyte recovery. <br /> MSRPD :MS/MSD Relative Percent Differeuce(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> DQO Data 2ualit0!�cctivc-This is the criteria against which the quality control data is compared. <br /> I ek Page 7 of 8 <br /> corporate Offices&Laboratory Office&Laboratory Office 6 Laboratory Office i Laboratory Field Office <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite O Visalia,Calilomis <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chloo,CA 95926 San Luis Obispo,CA 93401 TEL:(559)734-9473 <br /> is TEL:(805)392-2000 TEL:(209)9424)182 TEL:(530)343-5818 TEL:(805)783-2940 Mobile:(559)737-2399 <br /> Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)525-4172 FAX:(559)7348435 <br /> CA NELAP Certification No.01110CA CA ELAP Certification No.1663 CA ELAP Certification No.2670 CA ELAP Certification No.2775 <br />