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ENVIRONMEn ITAL n2l C <br /> ANALYTICAL CHEMISTS <br /> January 8, 2008 Lab ID : STK0752387 <br /> Wong Engineers,Inc. Customer : 3-12159 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as 450ONO3F 01/02/2008:200023 MS mg/L 4.000 105% 5-285 <br /> MSD mg/L 4.000 94.0% 5-285 <br /> MSRPD in 4.000 55% <_30.4 <br /> 450ONO3F 01/03/2008:200053 ICB m9/1 0.002 0.1 <br /> ICV mg/I 4.000 93.0% 90-110 <br /> CCB mg/1 -0.002 0.1 <br /> CCV mg/1 4.000 94.0% 90-110 <br /> DeWthm <br /> ICV :Initial Calibration Verification-Analyzed to verify the instrument calibration is within criteria <br /> ICB :Initial 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 /> 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 par-A random sample duplicate is spiked with a known amount of analyted. The <br /> recoveries are an indication of how that sample matrix affects=style recovery. <br /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> 222 Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Corporab Offices 8 Laboratory Office&Laboratory Office i Laboratory Field Office <br /> P.O.Box 272/853 Corporation Street 2500 Stagecoach Road 563 E.Lando Avenue Visalia,California <br /> Santa Paula,CA 93061-0272 Stockton,CA 95215 Chico,CA 95926 TEL:559!734-9473 <br /> TEL 805/392-2000 TEL 209/942-0182 TEL 530/343-5818 Mobile:559/737-2399 <br /> FAX:805/5254172 FAX:209/942-0423 FAX:530/343-3807 FAX 559!734-8435 <br /> CA NELAP Certification No.01110CA CA ELAP Certification No.1563 CA ELAP Certification No.2670 <br />