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i <br /> July 16, 2004 Lab ID SP 406530 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> IConstituent 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 /> BSD 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-Dtchloroethane 5242 07/07/2004 A209 Blank ug/L ND <0 5 <br /> I BS ug/L 1000 95 3% 75-142 <br /> BSD ug/L 1000 98 4% 75-142 <br /> BSRPD ug/L 32% 518 7 <br /> 5242 07/07/2004 A 00-ccv ug/L 1000 96 1% 70-130 <br /> I 1 2-Dtchloroethane 5242 07/07/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 104% 73-153 <br /> BSD ug/L 1000 93 0% 73-153 <br /> BSRPD ug/L 10 8% 523 6 <br /> 5242 07/07/2004 A 00-ccv ug/L 1000 102% 70-130 <br /> 1,I-Dtchloroethylene 5242 07/07/2004 A209 Blank ug/L ND <05 <br /> I BS ug/L 1000 990% 56-163 <br /> SSD ug/L 1000 985% 56-163 <br /> BSRPD ug/L 05% 5 24 0 <br /> 5242 07/07/2004 A 00-ccv ug/L 1000 986% 70-130 <br /> cis-1,2-Dichloroethylene 5242 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 106% 76-148 <br />' SSD ug/L 1000 91 0% 76-148 <br /> BSRPD ug/L 15 7% 530 2 <br /> 5242 07/07/2004 A 00-ccv ug/L 1000 107% 70-130 <br />' trans-1 2-Dtchloroethylene 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 /> I5242 07/07/2004 A 00-ccv ug/L 1000 91 3% 70-130 <br /> Dichloromethane 5242 07/07/2004 A209 Blank ug/L ND <0 5 <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 ug/L 1000 10890 1 70-130 <br /> L12-Dtchloropmpane 5242 07/07!2004 A209 Blank ug/L ND <0 5 <br /> Report continued on next page <br /> SP 406530 Quality Control Page 4 <br />