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ENVIRONMExITAL <br /> af <br /> ANALYTICAL CHEMISTS <br /> January 9, 2008 Lab ID : STK0751376 <br /> Neil Anderson & Associates Customer : 3-9574 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Viet Chem <br /> Nitrate+Nitrite as N 450ONO3F 12/04/2007:211711 MS mg/L 4.000 1150% <'/4 <br /> MSD mg/L 4.000 1290% Cr/4 <br /> MSRPD M91L 4.000 7.3% X30.4 <br /> j 450ONO3F 12/04/2007:212437 CCB mg/1 -0.008 0.1 <br /> CCV mg/1 4.000 95.9% 90-110 <br /> CCB mg/1 0.002 0.1 <br /> CCV m 1 4.000 9 7.1% 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 are an indication of how that sample <br /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted. The <br /> recoveries are an indication of how that sample matrix affects analyte recovery. <br /> 4 MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> <'/a :High Sample Background-Spike concentration was less than one forth of the sample concentration. <br /> i DQO :Data Qualily Objective-This is the criteria against which the quality control data is compared. <br /> 1 - <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Field Office <br /> P.O.Box 2721853 Corporation Street 2500 Stagecoach Road 563 E.Linde Avenue Visalia,California <br /> Santa Paula,CA 93061-0272 Stockton,CA 95215 Chico,CA 95926 TEL:559!734-9473 <br /> TEL:805/392-2000 TEL7 2091942-0182 TEL:5301343-5818 Mobile7 5591737-2399 <br /> FAX:8051525-4172 FAX:2091942-0423 FAX:530/343-3807 FAX:5591734-8435 <br /> CA NELAP Certification No.01110CA CA ELAP Certification No.1563 CA ELAP Certification No.2670 <br />