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Centrum <br /> I� 4 <br /> QC Sample Report - EPA 8020 (800) 798-9336 <br /> -:; Matrix:Water <br /> Batch##: 6020W2002 <br /> Batch Accuracy Results <br /> Sample ID: Laboratory Control Sample Analytical Notes: <br /> o � <br /> U E <br /> U <br /> ._:. CO j >O (� <br /> U ° o_ o ti <br /> m a� a� <br /> -: U <br /> Analyte 6) E o Q o <br /> Methyl-tart-butyl ether 0.10 95 70 - 130 Pass <br /> Benzene 0 10 93 70 130: Pass <br /> Toluene 0.10 95 70 - 130 Pass <br /> Ethyl Benzarte Q 10 94 7D 134' Pass <br /> m-, p-Xylene 0.20 98 70 130 Pass <br /> o-Xylen e 010 97 7:ff 130 .,as, <br /> Batch Precision Results <br /> MS/MSD Sample 4D: Laboratory Control Sample Analytical Notes, <br /> Q7 U 2 wca <br /> O <br /> j j 7 m LL <br /> YDx O 8 aD ❑ <br /> U U C- u) <br /> Analyte U)� rn� Of ❑ D� 0- <br /> r. <br /> Methyl-tent-butyl ether 0.092 0.106 14% 25% Pass <br /> Benzene 0.089 0.106 17% 25% Pass <br /> 0.086 0.105 20% 25% Pass <br /> Toluene <br /> f=i <br /> Ethyl Benzene 0.087 0.107 21% 25% Pass <br /> i rn-, p-Xylene 0.177 0.215 19% 25% Pass <br /> o-Xylene 0.086 0.104 19% 25% Pass <br /> MS:Matrix Spike Sample <br /> MSD:Matrix Spike Duplicate <br /> Page 7 of 14 <br />