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- -- = ENVIRONMENTAL <br /> nel C <br /> ANALYTICAL CHEMISTS <br /> October 19, 2007 Lab ID : STK0739616 <br /> Neil Anderson & Associates Customer : 3-9574 <br /> Quality Control - Inorganic <br /> Constituent Method Date11D Type Units Cone QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F 10/15/2007:210063 MS -91L 4.000 73.7% 5-285 <br /> MSD mg/L 4.000 73.0% 5-285 <br /> MSRPD m 4.000 0.8% <30.4 <br /> 450ONO3F 10/17/2007:210713 CCB mg/I 0.032 0.1 <br /> CCV 1119/1 4.000 98.3% 90-110 <br /> CCB mg/1 0.023 0.1 <br /> CCV m I 1 4.000 1 99.5% 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 /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> DQ :Data Quality Objective-This is the criteria against which the quality control data is cora ared. <br /> r <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Field Office <br /> P.O.Box 272 1853 Corporation Street 2500 Stagecoach Road 563 E.Lindo 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 /> — <br /> FAX 605/525-4172 FAX:209/942-0423 FAX:530/343-3807 FAX 559/734-8435 <br /> CA NELAP Certification No.01110CA CA ELAP CeN6cation No.1563 CA ELA.P Certification No.2670 <br />