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May 6, 2009 Lab ID : STK0933389 Valley Industries Customer : 3-11146 Quality Control - Organic Constituent Method Det.1D Type Units Cont. QC Data DQO Note Organic entachlorophenol 625 04/22/2009:204106 LCS ug/L 20.00 81.8% 10-117 BS ug/L 20.00 82.0% 63-165 BSD ug/L 20.00 89.8% 63-165 BSRPD a 10.00 9.1% 530.0 625 04/29/2009:205435 CCV m 10.00 125% 80-120 360 Phenanthrene 625 04/2212009:204106 Blank ug/L ND <1 LCS ug/L 10.00 71.4% 15-96 BS ug/L 10.00 79.8% 41-64 435 BSD ug/L 10.00 76.9% 41-64 435 BSRPD u 10.00 3.8% <30.0 625 04/29/2009:205435 CCV10.00 104% 80-120 Phenol 625 04/2112009:204106 Blank ug/L ND <1 LCs ug/L 20.00 62.8% 14-93 BS ug/L 20.00 64.7% 40-149 BSD ug/L 20.00 67.7% 40-149 BSRPD u 10.00 4.6% 5530.0 625 04/29/1009:205435 CCV 10.00 106% 80-120 hcnol-d6 625 04/22/2009:204106 Blank ug/L 20.00 NO <32-90 LCS ug/L 20.00 74.1% 32-90 BS ug/L 20.00 78.9% 20-114 BSD ug/L 20.00 80.9% 20-114 BSRPD u 10.00 2.6% 510.0 625 04/29/2009:205435 CCV m 20.00 102% 80-120 -Tetphenyl-dl4 625 04/22/2009:204106 Blank ug/L 10.00 ND <25-138 LCS ug/L 10.00 89.4% 25-138 BS ug/L 10.00 93-6% 20-154 BSD ug/L 10.00 92.3% 20-154 BSRPD UPJL 10.00 1.4% 520.0 625 04/29/2009:205435 CCV m 10.00 109% 80-120 Pyrime 625 04/22/1009:204106 Blank ug/L ND <1 LCS ug/L 10.00 71.8% 46-77 BS ug/L 10.00 79.7% 41-91 BSD ug/L 10.00 77.1% 41-91 BSRPD 1 110.003.3% <_30.0 625 04129/2009:205435 CCV m 10.00 98.0% 80-120 Pyridine 1 625 1 04122/2009:204106 1 Blank I u ND <10 625 04/29/200905435 1 CCV m 10.00 1 102% 80-120 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. 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. BSRPD :BSBSD 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 Quality Objective-This is the criteria against which the quality control data is cam ared. Explanation 310 :LCS above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 410 :Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV 1COMM. Page 21 of 24