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January 21, 2005 Lab ID STK438871 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' =Constituent Method Date/ID Type Units Cone QC Data DQO Note <br /> Hecachlornbutadiene 5242 12/30/2004 A209 BS ug/L 1000 135% 57-148 <br /> BSD ug/L 1000 140% 57 148 <br /> BSRPD u9/L 3 5% 524 4 <br /> 5242 12/30/2004 A 00 CCV ug/L 1000 172% 70-130 360 <br />' Isopropylbertzene 5242 12/30/2004 A209 Blank uglL ND <0 5 <br /> BS ug/L 1000 111% 66-129 <br /> BSD ug/L 1000 126% 66-129 <br />' BSRPD ug/L 129% 521 0 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 140% 70-130 360 <br /> p-Isopropyltoluene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br />' BS uglL 1000 106% 66-134 <br /> BSD ug1L 1000 113% 66-134 <br /> BSRPD uglL 62% :5 24 0 <br />' 524 2 12/30/2004 A 00-CCV ug/L 1000 134% 70-130 360 <br /> Melhyl tert Butyl Ether (MTBE) 5242 12/30/2004 A209 Blank ug/L ND <1 <br /> BS ug/L 1000 58 6% 51-166 <br /> BSD ug/L 1000 800% 51-166 <br /> BSRPD ug/L 30 9% 536 4 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 84 9% 70-130 <br /> Naphthalene 524 2 I2/3012004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 127% 54-156 <br /> BSD ug/L 1000 163% 54-156 435 <br /> BSRPD ug/L 25 0% 528 1 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 155% 70-130 360 <br /> n-Propylbenzene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 83 4% 63-134 <br /> BSD ug/L 1000 915% 63-134 <br /> BSRPD ug/L 9 3% 5 22 5 <br /> 5242 12/30/2004 A 00 CCV ug/L 1000 102% 70-130 <br /> Styrene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 107% 69-123 <br /> BSD ug/L 1000 123% 69-123 <br /> BSRPD ug1L t4 7% 517 6 <br /> 5242 12/30/2004 A 00-CCV uglL 1000 126% 70-130 <br /> Teri amyl methyl Ethtr (TAME) 5242 12/30/2004 A209 Blank ug/L ND <3 <br /> BS ug/L 1000 98 3% 52-142 <br /> BSD ug/L 1000 130% 52-142 <br /> BSRPD ug/L 3 2 53 00 410 <br /> 524 2 12/30/2004 A 00 CCV ug/L 1000 117% 70-130 <br /> 1,1 t 2-Tetra01oroethane 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> Report continued on neet page <br /> STK438871 Quality Control Page 6 <br />