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September 28, 2004 Lab ID STK436510 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/1D Type Units Cone QC Data DQO Note <br />' 1 2 Dichlorobenzene d4-Surrogate 524 2 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 /> BS ug/L 1000 95 7% 32-250 <br /> BSD ug/L 1000 85 6% 32-250 <br /> BSRPD ug/L 112% 516 4 <br />' 5242 09/20/2004 A 00-CCV ug/L 1000 772% 70-130 <br /> 1 1-Dichloroethane 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 73% 5 18 7 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 999% 70-130 <br />' l 2-Dichioroethane 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 13 1% 1523 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 <0 5 <br />' BS ug/L 1000 100% 56-163 <br /> BSD ug/L 1000 107% 56-163 <br /> BSRPD ug/L 6 5% 524 0 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 93 1% 70-I30 <br />' t,ts 1 2-Dtchloroethylene 524 2 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 71 4% 76-148 435 <br /> BSD ug/L 1000 91 0% 76-148 <br />' 13SRPD ug/L 24 1% 530 2 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 72 8% 70-130 <br /> trans 1,2 Dtchloroethylene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 929% 82-133 <br /> BSD ug/L 1000 101% 82-133 <br /> BSRPD ug/L 8 6% 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 <0 5 <br /> BS ug/L 1000 104% 77-144 <br /> BSD ug/L 10 00 114% 77-144 <br /> BSRPD ug/L 94% S21 3 <br /> 524 2 09/20/2004 A 00 CCV ug/L 1000 103% 70-130 <br /> 1 2 Dtchloropropane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> Report Lontmued on neva page <br /> STK436510 Quality Control Page 4 <br /> I <br />