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1 <br /> January 21, 2005 Lab ID STK438874 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Constituent Method DatelID Type Units Cone QC Data DQO Note <br />' 1 1 1 2-Tetrachloroethane 5242 12/30/2004 A209 BS ug/L 1000 112% 68-121 <br /> BSD ug/L 1000 134% 68-121 435 <br /> BSRPD ug/L 179% '175 410 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 132% 70-130 360 <br />' 1,1 2 2-Tetrachloroethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 68 5% 62-138 <br /> BSD ug/L 1000 88 6% 62-138 <br />' BSRPD ug/L 25 6% 526 9 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 82 4% 70-130 <br /> Tetrachloroethylene 5242 12/30/2004 A209 Blank ug1L ND <05 <br />' BS ug/L 1000 118% 62-116 435 <br /> BSD ug/L 1000 131% 62-116 435 <br /> BSRPD ug/L 10 7% 520 7 <br />' 524 2 12/30/2004 A 00-CCV ug/L 1000 143% 70-130 360 <br /> Toluene 5242 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 113% 59-124 <br /> BSD ug/L 1000 125% :! 17 9- 435 <br /> BSRPD uglL 104% 5 l7 9 <br /> 524 2 12/30/2004 A 00-CCV Ug/I- 1000 135% 70-130 360 <br /> 1 2 3-Trichlorobenzene 524 2 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 81 1% 64-152 <br /> BSD ug/L 1000 101% 64-152 <br /> BSRPD ug/L 21 5% 522 9 <br />' 524 2 12/30/2004 A 00 CCV ug/L 1000 101% 70-130 <br /> 1,2 4-Trichlorobenzene 5242 12/30/2004 A209 Blank ug1L ND <05 <br /> BS ug/L 1000 81 8% 67-140 <br />' BSD uglL 1000 97 2C0o 67-140 <br /> BSRPD ug/L 17 3% 520 1 <br /> 524 2 12/30/2004 A 00 CCV ug/L 1000 101% 1 70-130 <br /> I 1 1 1-Trichloroethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 91 6% 63-145 <br /> BSD uglL 1000 105% 63-145 <br /> BSRPD ug/L 13 7% 515 9 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 98 a% 70-130 <br /> 1 1 2 Trichloroethane 524 2 12/30/2004 A209 Blank, ug/L ND <0 5 <br /> BS ug/L 1000 807% 63 131 <br /> BSD ug/L 1000 103% 63-131 <br /> BSRPD ug1L 24 2% 525 5 <br /> -242 12/30/2004 A 00 CCV uglL 1000 91 9% 70-130 <br /> Trichloroethylene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> Report connnurd on nett page <br /> STK438874 Quality Control Page 7 <br /> i <br />