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September 28, 2004 Lab ID STK436506 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/E[) Type Units Cone. QC Data DQO Note <br />' 1 2 Dichlorobenzene N 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 /> t Dichlorodifluoromethane 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 95 7% 32-250 <br /> BSD ug/L 1000 85 6% 32-250 <br /> BSRPD ug/L 11 2% 2g 16 4 <br />' 524 2 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 7 3% c 18 7 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 999% 70-130 <br />' 1 2 Dichloroethane 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 902% 73-153 <br /> BSD ug/L 1000 103% 73-153 <br /> BSRPD ug/L 13 1% 523 6 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 86 9% 70-130 <br /> 1 1 D:chloroethylene 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 /> 13SRPD ug/L 65% 524 0 j <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 93 1% 70-130 <br />' cis-t 2-Dichloroethylene 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 /> I BSRPD ug/L 24 1% r 30 2 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 728% 70-130 <br /> trans-I 2 Dichloroethylene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 92 9% 82-133 <br /> SSD ug/L 1000 101% 82-133 <br /> 13SRPD 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 <05 <br /> BS ug/L 1000 104% 77-144 <br /> BSD ug/L 1000 114% 77-144 <br /> IBSRPD ug/L 94% 521 3 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 103% 70-130 <br /> 1 2 Dichloropropane 524 2 09/20/2004 A209 Blank ug/L ND <0 5 <br /> Report continued on next page <br /> STK436506 Quality Control Page 4 <br /> r <br />