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1 <br /> July 16, 2004 Lab ID SP 406522 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent 7Method Date/ID Type Units Cone QC Data DQO Note <br />' l 2-Dichlorobenzene-d4-Surrogate 5242 07/02/2004 A209 BS ug/L 1000 113`!0 70-130 <br /> BSD ug/L 1000 93 9% 70-130 <br /> 5242 07/02/2004 A 00-CCV ug/L 1000 116% 70-130 <br />' <br /> Dichlorodifluoromethane 5242 07/02/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 95 1% 32-250 <br /> BSD ug/L 1000 114% 32-250 <br /> BSRPD ug/L 28 7% 516 4 410 <br />' 5242 07/02/2004 A 00-CCV ug/L 10 00 80 9% 70-130 <br /> 1 1-Dichloroethane 5242 07/02/2004 A209 Blank ug/L ND <05 <br />' BS ug/L 1000 93 0% 75-142 <br /> BSD ug/L 1000 924% 75-142 <br /> BSRPD ug/L 05% 518 7 <br />' <br /> 5242 07/02/2004 A 00-CCV ug/L 1000 92 3% 70-130 <br /> 1 2-Dichloroethane 5242 07/02/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 108% 73-153 <br /> SSD ug/L 1000 80 8% 73-153 <br /> BSRPD ug/L 29 1% 523 6 410 <br /> 5242 07/02/2004 A 00-CCV ug/L 1000 101% 70-130 <br />' 1 1-Dichloroethylene 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 97 8% 56-163 <br /> BSD ug/L 1000 101% 56-163 <br /> BSRPD ug/L 28% 524 0 <br />' <br /> 5242 07/02/2004 A 00-CCV ug/L 1000 908% 70-130 <br /> cis-1 2-Dichloroethylene 524 2 07/02/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 106% 76-148 <br />' BSD ug/L 1000 87 6% 76-I48 <br /> BSRPD ug/L 18 6% 29302 <br /> 5242 07/02/2004 A 00-CCV ug/L 1000 102% 70-130 <br />' trans-l,2-Dichloroethylene 5242 07/02/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 93 1% 82-133 <br /> BSD ug/L 1000 94 1% 82-133 <br /> BSRPD ug/L 10% X23 3 <br />' 5242 07/02/2004 A 00-CCV ug/L 1000 92 1% 70-130 <br /> Dichloromethane 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 105% 77-144 <br />' BSD ug/L 1000 960% 77-144 <br /> BSRPD ug/L 89% X21 3 <br /> 5242 07/02/2004 A 00-CCV ug/L 1000 100% 70-130 <br /> 1 2-Dichloropropane 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br /> Report continued on next page <br /> SP 406522 Quality Control Page 4 <br />