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April 7, 2009 Lab ID : STK0932169 San Joaquin County Solid Waste Customer : 3-2956 Quality Control-Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Isopropylbenzene 8260B 03/09/2009:203060 CCV ug/L 25.00 87.3% 70-130 ethac lonitrile 8260B 03/09/2009:203060 CCV u 400.0 93.6% 50-150 I th 1 Iodide 8260B 03/09/2009:203060 CCV u L 242.4 81.4% 50-150 th I Methac late 8260B 03/09/2009:203060 CCV u L 40.00 83.0% 50-150 th 1 tert-Bu 1 Ether 8260B 03/09/2009:203060 CCV ug/L 50.00 134% 70-130 360 phthalene 8260B 03/09/2009:203060 CCV ug/L 25.00 73.4% 70-130 u Ibenzene 8260B 03/09/2009:203060 CCV ug/L 25.00 98.3% 70-130 ro ]benzene 8260B 03/09/2009:203060 CCV ug/L 25.00 99.0% 70-130 so ro yholuene 8260B 03/09/2009:203060 CCV u L 25.00 98.2% 70-130 ionitrile 8260B 03/09/2009:203060 CCV ug/L 400.0 76.3% 50-150 -Bu Ibenzene 8260B 03/09/2009:203060 CCV u L 25.00 96.1% 70-130 rene 8260B 03/09/2009:203060 CCV u 25.00 96.0% 70-130 ME 8260B 03/09/2009:203060 CCV u L 50.00 123% 50-150 -Butanol 8260B 03/09/2009:203060 CCV u L 250.0 106% 50-150 -Bu Ibenzene 8260B 03/09/2009:203060 CCV u L 25.00 96.8% 70-130 rachloroeth lene CE 8260B 03/09/2009:203060 CCV u L 25.00 103% 70-130uene 8260B 03/09/2009:203060 CCV u L 25.00 100% 80-120uene-d8 8260B 03/09/2009:203060 CCV u L 25.00 102% 70-130s-l,2-Dichloroeth lene 8260B 03/09/2009:203060 CCV u L 25.00 102% 70-130 s-1,3-Dichlororo ene 8260B 03/09/2009:203060 CCV ug/L 23.75 93.8% 70-130 trans-1,4-Dichloro-2-butene 8260B 03/09/2009:203060 CCV ug/L 40.00 94.8% 50-150 Trichloroethylene(TCE) 8260B 03/09/2009:203060 CCV ug/L 25.00 102% 70-130 Trichlorofluoromethane F-I I 8260B 03/09/2009:203060 CCV u 40.00 102% 70-130 richlorotrifluoroethane F-113 8260B 03/09/2009:203060 CCV ug/L 25.00 110% 70-130 Vinyl Acetate 8260B 03/09/2009:203060 CCV u L 242.4 89.4% 50-150 Vinyl Chloride 8260B 03/09/2009:203060 CCV ug/L 40.00 108% 80-120 lene m,p 8260B 03/09/2009:203060 CCV ug/L 1 50.00 100% 70-130 [Kylenes o 8260B 03/09/2009:203060 CCV u 25.00 99.7 0/6 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries are an indication of how that sample matrix affects analyte recovery. BS :Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. BSD :Blank Spike Duplicate of BS/BSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. BSRPD :BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data uali Objective-This is the criteria against which the quality control data is compared. Explanation 210 :The method blank was positive.However,samples reported were either ten times greater than the blank concentration or non detect and accepted. 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. Page 27 of 27