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1 <br /> January 21, 2005 Lab 1D STK438873 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Cone QC Data DQO Note <br /> 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% <_17 5 410 <br /> 5242 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 <05 <br /> BS ug/L 1000 68 5% 62-138 <br /> BSD ug/L 1000 88 6% 62-138 <br /> BSRPD ug/L 25 6% X26 9 <br />' 5242 12/30/2004 A 00-CCV ug/L 1000 824% 70-130 <br /> Tetrachloroethylene 5242 12/30/2004 A209 Blank ug/L ND <05 <br />' BS ug/L 1000 118% 62-116 435 <br /> BSD ug/L 1000 131% 62-116 435 <br /> BSRPD ug/L 107% 520 7 <br /> 5242 12/30/2004 A 00-CCV uglL l0 00 143% 70-130 360 <br />' Toluene 5242 12/30/2004 A209 Blank uglL ND <05 <br /> BS ug/l, 1000 113% 59-124 <br /> BSD uglL 1000 125% 59-124 435 <br /> BSRPD uglL 104% .5179 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 135% 70-130 360 <br /> 1 2 3-Trtchlorobenzene 524 2 12/30/2004 A209 Blank ug/L ND <05 <br />' BS uglL 1000 81 1% 64-152 <br /> BSD uglL 1000 101% 64-152 <br /> BSRPD ug/L 215% 522 9 <br />' 524 2 12/30/2004 A 00 CCV ug/L 1000 101% 70-130 <br /> 1 2 4-Trtchlorobenzene 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 81 8% 67-140 <br /> BSD ug/L 1000 972% 67-140 <br />' BSRPD ug/l, 17 3% 520 1 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 101% 70-130 <br />' 1 1 1-Trichloroethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 916% 63-145 <br /> BSD ug/L 1000 105% 63445 <br /> BSRPD uglL 13 7% 515 9 <br />' 5242 12/30/2004 A 00 CCV ug/L 1000 984% 70-130 <br /> 1 1 2-Trmhloroethane 5242 12/30/2004 A209 Blank ug/L ND CO 5 <br /> BS ug/L 1000 807% 63-131 <br /> 1 BSD ug/L 1000 103% 63-131 <br /> BSRPD ug/L 24 2% 525 5 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 919% 70-130 <br /> TnLh[oroethylene 524 2 12/30/2004 A209 Bl ink ug/L ND <0 5 <br /> Repurl LOIIIIIIUld on next page <br />' STK438873 Quality Control Page 7 <br /> 1 <br />