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l ` - ENVIRONMENTAL <br /> ANALYTICAL CHEMISTS <br /> October 29, 2007 Lab ID : STK0739802 <br /> Kleinfelder Inc. Customer : 3-2703 <br /> Quality Control - Inorganic <br /> Constituent Method Date/lD Type Units Cone. QC Data DQO Note <br /> NN et Chem <br /> Nitrate 300.0 10/16/2007:210169 LCS mg/L 20.00 98.4% 90-110 <br /> MS mg/L 400.0 102% 88-124 <br /> MSD mg/L 400.0 109% 88-124 <br /> MSRPD mg/L 100.0 6.1% X9.1 <br /> 300.0 10/17/2007:210764 CCB ppm 0.000 0.4 <br /> — CCV ppm 20.00 101% 90-110 <br /> CCB ppm 0.009 0.4 <br /> CCV ppm 20.00 102% 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 /> LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. <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 analyzed. 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 /> DQO Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> I` <br /> Y <br /> L <br /> ^Corporate ORicea&Laboratory Office&Laboratory Office&Laboratory Field Office��K <br /> P.O.Box 272/853 Corporation Street 2500 Stagecoach Road 563 E.Lind.Avenue Visalia,California <br /> `✓ Santa Paula,CA 93061-0272 Stockton,CA 95215 Chico,CA 95926 TEL:559/734-9473 <br /> TSL:605/392-2000 TEL:209/942-0182 TEL:530/343-5818 Mobile:559/737-2399 <br /> FAX:605/5254172 FAX:209/942-0423 FAX:530/343-3807 FAX:559/734-8435 <br /> CA NELAP Certification No.0111DCA CA ELAP Certification No.1563 CA ELAP Certification No.2670 <br />