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= -_asENVIRO1`IME TAL <br /> Analytical Chemists <br /> September 2, 2009 Lab ID : STK0938103 <br /> Coldani Realtors Inc. Customer : 3-15433 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> 'et Chem <br /> Nitrate+Nitrite as 450ONO3F 09/022009:209244 MS mg/L 4.000 113% 5-285 <br /> (CH 0976366-002) MSD mg/L 4.000 94.4% 5.285 <br /> MSRPD mg/L 4.000 4.9p/ X0.4 <br /> MS mg/L 4.000 127% 5-285 <br /> (STK0938103-010) MSD mg/L 4.000 132% 5-285 <br /> MSRPD mg1L 4.000 0.8% X0.4 <br /> 450ONO3F 09/022009:211384 CCB mg/L 0.002 0.1 <br /> CCV mg/L 4.000 99.9% 90-110 <br /> CCB mg/L 0.006 0.1 <br /> CCV mg/L 4.000 91.1% 94110 <br /> CCB mg/L -0.0003 0.1 <br /> CCV m 4.000 1 92,0% 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 recoveries <br /> arean 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 far the preparation <br /> and analysis. <br /> Data Quality Objective-This is the criteria against which the quality control data is cora red. <br /> Page 23 of 23 <br /> Corporate Offices&Laboratory ORiee 6 Laboratory Office&Laboratory Field Office <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue Visalia,California <br /> Santa Paula,CA 93060 Stockton,CA95215 Chico,CA 95926 TEL:55917349473 <br /> TEL 805/392-2000 TEL:209/942-0182 TEL:530/343-5818 Mobile:5591737-2399 <br /> FAX 805/525,1172 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 />