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October 07, 2003 Lab ID STK335847 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Constituent Method Date/ID Type Units Cone QC Data DQO Note <br /> n-Butylbenzene 5242 10/02/2003 A209 BS ug/L 1000 98 1% 89-158 <br /> BSD ug/L 1000 107% 89-158 <br /> BSRPD ug/L 8 5% 515 3 <br /> 5242 10/02/2003 A 00 CCV ug/L 1000 108% 70-130 <br /> sec-Butylbenzene 5242 I0102/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 112% 92-147 <br /> BSD ug/L 1000 118% 92-147 <br /> BSRPD ug/L 52% 5I5 3 <br /> 5242 10/02/2003 A 00-CCV ug/L 1000 119% 70 130 <br /> tert-Butylbenzene 5242 10/02/2003 A209 Blank ug/L ND <0 5 <br /> BS ug1L 1000 133% 79-140 <br /> BSD ug/L 1000 144% 79-140 435 <br /> BSRPD ug/L 84% <_15 8 <br /> 5242 10/02/2003 A 00-CCV ug/L 1000 138% 70-130 360 <br /> Carbon Tetrachloride 5242 10/02/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 113% 80-151 <br /> BSD ug/L 1000 121% 80-151 <br /> BSRPD ug/L 74% 520 6 <br /> . 5242 10/02/2003 A 00-CCV ug/L 1000 127% 70-130 <br /> Chlorobenzene 5242 10/02/2003 A209 Blankug/L ND <0 5 <br /> BS ug/L 1000 110% 74-134 <br /> BSD ug/L 1000 115% 74-134 <br /> BSRPD ug/L 4 1% 516 9 <br /> 5242 10/02/2003 A 00-CCV ug/L 1000 105% 70-130 <br /> Chloroethane 5242 10/02/2003 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 104% 80-173 <br /> BSD ug/L 1000 105% 80-173 <br /> BSRPD ug/L 12% 5 16 1 <br /> 5242 10/02/2003 A 00-CCV ug/L 1000 106% 70-130 <br /> Chloroform 5242 10/02/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 92 1% 78-141 <br /> BSD ug/L 1000 94 8% 78-141 <br /> BSRPD ug/L 29% 517 6 <br /> 5242 10/02/2003 A 00-CCV ug/L 1000 91 5% 70 130 <br /> Chloromethane 5242 10/02/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 107% 68-165 <br /> BSD ug/L 1000 104% 68-165 <br /> BSRPD ug/L 24% �f-15 7 <br /> 524 2 10/02/2003 A 00-CCV ug/L 1000 112% 70 130 <br /> 2-Chlorotoluene 5242 10/02/2003 A209 Blank ug/L ND <0 5 <br /> Report continued on next page <br /> STK335847 Quality Control Page 2 <br />