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I <br /> January 21, 2005 Lab ID STK438868 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Cone QC Data DQO Note <br /> —] <br />' n Butylbenzene 5242 12/30/2004 A209 BS ug/L 1000 77 7% 59-143 <br /> SSD uglL 1000 805% 59-143 <br /> BSRPD ug/L 3 5% 5 24 9 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 91 8% 70-130 <br />' sec-Butylbenzene 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 922% 57-146 <br /> BSD ug/L 10 00 102% 57-146 <br />' BSRPD ug/L 100% 524 2 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 115% 70-130 <br /> tert Butylbenzene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br />' BS ug/L 10 00 106% 63-124 <br /> BSD ug/L 1000 117% 63-124 <br /> BSRPD ug/L 10 5% 524 1 <br />' 524 2 12/30/2004 A 00-CCV ug/L 10 00 139% 70-130 360 <br /> Carbon Tetrachloride 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 98 3% 58-149 <br /> BSD ug/L 10 00 113% 58-149 <br /> BSRPD ug/L 13 8% <_17 7 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 112% 70-130 <br /> Chlorobenzene 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 10 00 144% 64-119 435 <br /> BSD ug/L 1000 161% 64-119 435 <br /> BSRPD ug/L 11 2% 517 9 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 166% 70-130 360 <br /> Chloroethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 909% 49-170 <br />' BSD ug/L 1000 86 5% 49-170 <br /> BSRPD ug/L 49% 522 4 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 14117a 70-130 360 <br />' Chloroform 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 62 3% 73-136 435 <br /> BSD ug/L 1000 84 8% 73-136 <br /> BSRPD ug/L 30 7% 520 3 410 <br /> I5242 12/30/2004 A 00 CCV ug/L 1000 71 8% 70-130 <br /> Chloromethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 699% 37-171 <br /> BSD ug/L 1000 59 8% 37-171 <br /> BSRPD ug/L 15 6% 535 9 <br /> 524 2 12/30/2004 A 00 CCV ug/L 1000 111170 70-130 <br /> 2 Chlorotoluene 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> Report Lonttnued on next page <br /> STK438868 Quality Control Page 2 <br />