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ENVIRONMENTAL nel C <br /> ANALYTICAL CHEMISTS <br /> November 19, 2007 Lab ID : STK0739753 <br /> Chesney Consulting Customer : 3-15419 <br /> Quality Control - Organic <br /> Constituent Method Date/1D Type Units Conc. QC Data DQO Note <br /> Organic <br /> 1,3-Dibromopropane 504 10/16/2007:210112 Blank ug/L 0.5868 70-130 70-130 <br /> LCS ug/L 0.5868 99.8% 70-130 <br /> BS ug/L 0.5868 102% 70-130 <br /> BSD ug/L 0.5868 103% 70-130 <br /> BSRPD ug/L 0.2950 1.1% <30 <br /> 13DBP 504.1 10/17/2007:210687 CCV ug/L 9.975 102% 70-130 <br /> CCV ug/L 9.975 104% 70-130 <br /> DBCP 504 10/16/2007:210112 Blank ug/L ND <0.01 <br /> LCS ug/L 0.2950 96.3% 70-130 <br /> BS ug/L 0.2950 98.5% 70-130 <br /> BSD ug/L 0.2950 101 % 70-130 <br /> BSRPD ug/L 0.2950 2.6% <_30 <br /> 504.1 10/17/2007:210687 CCV ug/L 5.000 102% 70-130 <br /> CCV a /1. 1 10.00 1 106% 70-130 <br /> Definition <br /> CCV :Continuing Calibration Verification- Analyzed to verify the instrument calibration is within criteria. <br /> Blank Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. <br /> BS :Blank Spikes-A blank is spiked with a known amount of analyte. It is prepared to verify that the preparation process is not <br /> affecting analyte recovery. <br /> BSD :Blank Spike Duplicate of BSBSD pair-A blank duplicate is spiked with a known amount of analyte. It is prepared to verify <br /> that the preparation process is not affecting analyte recovery. <br /> BSRPD :BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Corporate Offices S Laboratory Office 8.Laboratory Office S 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 /> FAX:805/525-4172 FAX:209/942-0423 FAX:530/343-3807 FAX 559/734-8435 <br /> CA NELAP Certification No.01110CA CA ELAP Certification No 1563 CA FLAP Certification No.2670 <br />