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i <br /> January 02, 2004 Lab ID STK338056 <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 Mchloroberizene 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 /> 13SRPD ug/L 6 8% 516 4 <br /> 5242 I2/19/2003 A 00-CCV ug/L 1000 91 70-130 <br /> i,1-Dichloroethane 5242 12/19!2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 121% 75-142 <br /> BSD ug/L 1000 115% 75-142 <br /> BSRPD ug/L 54% 18 7 <br /> 5242 12/19!2003 A 00-CCV ug/L 1000 115% 70-130 <br /> 1,2-Dichloroethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 117% 73-153 <br /> BSD ug/L 1000 111% 73-153 <br /> 13SRPD ug/L 52% 523 6 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 108% 70-130 <br /> 1,1-Dichloroethylene 5242 12/19/2003 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 120% 56-163 <br /> BSD ug/L 1000 110% 56-163 <br /> BSRPD ug/L 91% 524 0 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 121% 70-130 <br /> cis-I 2-Dichloroethylene 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 107% 76-148 <br /> BSD ug/L 1000 103`70 76-148 <br /> BSRPD ug/L 41% 530 2 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 98 8`:a 70-130 <br /> rrans-1 2-Dichloroethylene 5242 I2/19/2003 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 116% 82-133 <br /> BSD ug/L 1000 113% 82-133 <br /> BSRPD ug/L 32% <23 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 <05 <br /> BS ug/L 1000 127% 77-144 <br /> BSD ug/L 1000 119`70 77-144 <br /> BSRPD ug/L 6 9% 521 3 <br /> 5242 1 12/19/2003 A 00-CCV I ug/L 1000 115% 70 130 <br /> 1 2-Dichloropropane 5242 12/I912003 A209 Blank ug/L ND <br /> <05 <br /> Report continued on next page <br /> STK338056 Quality Control Page 4 <br />