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September 28, 2004 Lab ID STK436503 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> 1�[' Constituent Method Date/ID Type Units Cone QC Data DQO Note <br /> 12 Dichlorobenzene d4 Surrogate 5242 09/20/2004 A209 BS ug/L 1000 118% 70-130 <br />' BSD ug/L 1000 124% 70-130 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 126% 70-130 <br />' Dichlorodifluoromethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> B5 ug/L 1000 95 7% 32-250 <br /> BSD ug/L 1000 8545% 32-250 <br /> BSRPD ug/L it 2% 516 4 <br />' 5242 09/20/2004 A 00-CCV ug/L 1000 772% 70-130 <br /> 1 I-Dtchloroethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 102% 75-142 <br />' BSD ug/L 1000 110% 75-142 <br /> BSRPD ug/L 7 3% 5 18 7 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 999% 1 70-130 <br />' 1,2-Dtchloroethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 902% 73-153 <br /> BSD ug/L 1000 103% 73-153 <br /> BSRPD ug/L 1 13 l% 523 6 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 869% 70-130 <br /> 1 1 Dtchloroethylene 5242 09/20/2004 A209 Blank ug/L ND <05 <br />' BS ug/L 1000 100% 56-163 <br /> BSD ug/L 1000 107% 56-163 <br /> BSRPD ug/L 65% 524 0 <br /> 524 2 09/20/2004 A 00-CCV ug/L 1000 93 1% 70-130 <br />' cis-1 2-Dtc.hloroethylene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 714% 76-148 435 <br /> BSD ug/L 1000 910% 76-148 <br />' BSRPD ug/L 24 1% 530 2 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 728% 70-130 <br /> trans-I 2-Dtchloroethylene 5242 09/20/2004 A209 Blank ug/L ND <05 <br />' BS ug/L 1000 929% 82-133 <br /> BSD ug/L 1000 101% 82-133 <br /> BSRPD ug/L 86% 523 3 <br />' <br /> 5242 09/20/2004 A 00 CCV ug/L 1000 88 1% 70-130 <br /> Dichloromethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 104% 77-144 <br /> BSD ug/L 1000 114% 77-144 <br />' BSRPD ug/L 9 .47 S21 t <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 103% 70-130 <br /> 12-Dtchlorupropane 5 14 2 09120/2004 A209 Blank ug/L ND <0 <br /> Report continued on next page <br /> STK436503 Quality Control Page 4 <br /> I <br />