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i <br /> i <br /> . March 31, 2004 Lab ID STK431889 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Constituent Method Date/ED Type Units Cone QC Data DQO Note <br /> I 2-Dcchlorobenzene-d4-SurragaEe 5242 03/28/2004 A209 BS ug/L 1000 120% 70-130 <br /> BSD ug/L 1000 121% 70-130 <br /> 5242 0312812004 A 00-CCV ug/L 1000 119% 70-130 <br /> Dichlorodifluoromethane 5242 03/28/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 103% 32-250 <br /> BSD ug/L 1000 907% 32-250 <br /> BSRPD ug/L 123% 516 4 <br /> 5242 03128!2004 A 00-CCV ug/L 1000 101% 70-130 <br /> 1 I-Dichloroethane 5242 0312812004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 103% 75-142 <br /> BSD ug/L 1000 866% 75-142 <br /> BSRPD ug/L 172% 5187 <br /> 5242 03128 2004 A 00-CCV ug/L 1000 996% 70-130 <br /> 1 2-Dtchloroethane 5242 03/28/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 104% 73-153 <br /> BSD ug/L 1000 874% 73-153 <br /> BSRPD ug/L 17 1% 523 6 <br /> 5242 0312312004 A 00-CCV ug/L 1000 969% 70-130 <br /> 1 1-Dichloroethylene 5242 0312812004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 101% 56-163 <br /> BSD ug/L 1000 872% 56-163 <br /> BSRPD ug/L 145% S24 0 <br /> 5242 03128 2004 A 00-CCV ug/L 1000 97 1% 70-130 <br /> cis-1 2-Dichloroethylene 5242 0312812004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 97 3% 76-148 <br /> BSD ug/L 1000 860% 76-148 <br /> BSRPD ug/L 123% 530 2 <br /> 5242 03/28,2004 A 00-CCV ug/L 1000 905% 70-130 <br /> trans-1,2-Dtchloroethylene 5242 03/28/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 969% 82-133 <br /> BSD ug/L 1000 840% 82-133 <br /> BSRPD ug/L 142% 523 3 <br /> 5242 031M2004 A 00-CCV ug/L 1000 95 1% 70-130 <br /> Dichloromethane 5242 03/28/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 960% 77-144 <br /> BSD ug/L 1000 85 1% 77-144 <br /> BSRPD ug/L 120% 521 3 <br /> 5242 03/29/2004 A 00-CCV ug/L 1000 83 4% 70-130 <br /> i — I I <br /> E 2-Dtchloropropane 524 2 03/28/3004 A209 Blank ug/L ND <05 <br /> Report continued on next page <br /> STK431889 Quality Control Page 4 <br />