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July 16, 2004 Lab ID SP 406528 <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 2 Dichlorobenzene-d4 Surrogate 5242 07/07/2004 A209 BS ug/L 1000 112% 70-130 <br /> SSD ug/L 1000 104% 70-130 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 130% 70-130 <br />' Dichlorodifluoromethane 5242 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 85 3% 32-250 <br /> BSD ug/L 1000 83 5% 32-250 <br /> BSRPD ug/L 22% :516 4 <br />' 5242 07/07/2004 A 00-CCV ug/L 1000 900% 70-130 <br /> 1,1-Dichloroethane 524 2 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 95 3% 75-142 <br /> BSD ug/L 1000 984% 75-142 <br /> BSRPD ug/L 3 2% 1518 7 <br /> 524 2 07/07/2004 A 00-CCV ug/L 1000 96 1% 70-130 <br /> 1,2-Dichloroethane 5242 07/07/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 10476 73-153 <br /> BSD ug/L 1000 930% 73-153 <br /> BSRPD ug/L 108% 5236 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 102% 70-130 <br /> 1,1-Dichloroethylene 5242 07/07/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 990% 56-163 <br /> BSD ug/L 1000 985% 56-163 <br /> BSRPD ug/L 05% 5240 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 98 6% 70-I30 <br /> cis-1 2-Dichloroethylene 5242 07/07/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 106% 76-148 <br /> BSD ug/L 1000 910% 76-148 <br />' BSRPD ug/L 157% 530 2 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 107% 70-130 <br /> 1 trans-l,2-Dichloroethylene 5242 07/07/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 962% 82-133 <br /> BSD ug/L 1000 922% 82-133 <br /> BSRPD ug/L 43% 523 3 <br />' <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 913% 70-130 <br /> Dichloromethane 5242 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 107% 77-144 <br />' BSD ug/L 1000 94 8% 77-144 <br /> BSRPD ug/L 119% 5213 <br /> 5242 07/07/2004 A 00-CCV uglL 1000 108% 70-130 <br /> 1 2 Dichloropropane 5242 07/07/2004 A209 Blank ug/L ND <05 <br /> Report continued on next page <br />' SP 406528 Quality Control Page 4 <br />