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I <br /> • January 02, 2004 Lab ID STK338049 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Constituent Method Date/TD Type units Cone QC Data DQO Note <br /> 1 2-Dichlorobenzene-d4 Surrogate 5242 12/19/2003 A209 BS ug/L 1000 101% 70-130 <br /> BSD ug/L 1000 106% 70-130 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 104% 70-130 <br /> Dichlorodifluoromethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 83 6% 32-250 <br /> BSD ug/L 1000 895% 32-250 <br /> BSRPD ug/L 6 8% 516 4 <br /> 5242 12119!2003 A 00-CCV ug/L 1000 91 0% 70-130 <br /> 1 1-Dtchlorcethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 121% 75-I42 <br /> BSD ug/L 1000 115% 75-142 <br /> BSRPD ug/L 54% 518 7 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 1 115% 70-130 <br /> 1 2-Dtchloroethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 117% 73-153 <br /> BSD ug/L 1000 5236 5 2 2°10% 7 <br /> BSRPD ug/L 5 <br /> 524 2 12/19/2003 A 00-CCV ug/L 1000 108% 70-130 <br /> 1,1-Dtchloroethylene 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 120% 56-163 <br /> BSD ug/L 1000 110% 56-163 <br /> BSRPD ug/L 9 1% 524 0 <br /> 5242 12/19/2003 A 00 CCV ug/L 1000 121% 70-130 <br /> cts-1 2-Dtchloroethylene 524 2 12/19/2003 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 107% 76-148 <br /> BSD ug/L 1000 103% 76-148 <br /> BSRPD ug/L 4 1% 530 2 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 98 8% 70-130 <br /> trans-1,2 Dtchloroethylene 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 116% 82-133 <br /> BSD ug/L 1000 113% 82-133 <br /> BSRPD ug/L 32% 523 3 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 118% 70-130 <br /> Dichloromethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 127% 77-144 <br /> BSD ug/L 1000 119% 77-144 <br /> BSRPD ug/L 69% 521 3 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 115% 70-130 <br /> 1 2 Dtchloropropane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> Report continued on next page <br /> STK338049 Quality Control Page 4 <br />