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May 5, 2009 Lab ID : STK0933137 Valley Industries Customer : 3-11146 Quality Control - Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic entachtorophenol 625 04/15/2009:203838 LCS 119/1, 20.00 122% 10-117 310 BS 119/1, 20.00 107% 63-165 BSD ug/L 20.00 103% 63-165 BSRPD 1191L 20.00 3.6% 530.0 625 04/25/2009:205277 CCV m 10.00 133% 80-120 360 henanthrene 625 04/15/2009:203838 Blank 119/1, ND <1 LCS ug/L 10.00 84.5% 15-96 BS ug/L 10.00 82.7% 41-64 435 BSD ug/L 10.00 86.3% 41-64 435 BSRPD ugtL 20.00 4.3% 530.0 625 04/25/2009:205277 CCV m 10.00 103% 80-120 Phenol 625 04/15/2009:203838 Blank ug/L ND <1 LCS ug/L 20.00 74.7% 14-93 BS ug/L 20.00 65.5% 40-149 BSD ug/L 20.00 63.9% 40-149 BSRPD u 20.00 2.5% 530.0 625 04125/2009:205277 CCV 111911, 10.00 96.3% 80-120 enol-d6 625 04/152009:203838 Blank ug/L 20.00 ND <32-90 LCS ug/L 20.00 85.5% 32-90 BS ug/L. 20.00 75.5% 20-114 BSD ug/L 20.00 73.5% 20-114 BSRPD ugtL 20.00 2.7% «'0.0 625 04252009:205277 CCV m 20.00 95.2% 80-120 -Terphenyl-d14 625 04/152009:203838 Blank ug(L 10.00 ND O5-138 LCS ug/L 10.00 102% 25-138 BS ug/L 10.00 95.4% 20-154 BSD ug/L 10.00 101 % 20-154 BSRPD a 20.00 5.5% 520.0 625 04252009:205277 CCV 10.00 112% 80-120 Pyrene 625 04/152009:203838 Blank ug(L ND <1 LCS ug/L 10.00 79.5% 46-77 310 BS ug/L 10.00 76.2% 41-91 BSD ug/L 10.00 79.9% 41-91 BSRPDu 20.00 4.9% <30.0 625 04/25/2009:205277 CCV m 10.00 98.2% 1 80-120 yridine04/15/2009:203838 Blank I ugL I I ND I <10 OR 04/252009:205277 1 CCV 1m 10.00 1 94.5% 1 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=style 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 :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 Quality Objective-This is the criteria a ainst which the uality control data is compared. 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 recovery. Page 23 of 26