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September 28, 2004 Lab YD STK436509 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Hexachlorobutadtene 5241 09/20/2004 A209 BS ug/L 1000 103% 73-154 <br />' BSD ug/L 1000 100% 73-154 <br /> BSRPD ug/L 2 8% 515 8 <br /> 5242 09/20/2004 A 00 CCv ug/L 1000 108% 70-130 <br />' Isopropyl benzene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 82 8% 88-143 435 <br /> BSD ug/L 1000 812% 88-143 435 <br />' BSRPD ug/L 19% 517 0 <br /> 5242 09/20/2004 A 00 ccv ug/L 1000 845% 70-130 <br /> p-Isopropyltoluene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 928% 88-153 <br /> BSD ug/L 1000 927% 88-153 <br /> BSRPD ug/L 01% 514 8 <br />' <br /> 5242 09/20/2004 A 00-ccv ug/L 1000 944% 70-130 <br /> Methyl teri Butyl Ether (MTBE) 524 2 09/20/2004 A209 Blank ug/L ND <1 <br /> BS ug/L 1000 994% 62-143 <br /> BSD ug/L 1000 120% 62-143 <br /> BSRPD ug/L 190% S 17 6 410 <br /> 5242 09/20/2004 A 00-ccv ug/L 1000 930% 70-130 <br /> Naphthalene 524 2 09/20/2004 A209 Blank ug/L ND <05 <br />' BS ug/L 1000 115% 63-165 <br /> BSD ug/L 1000 143% 63-165 <br /> BSRPD ug/L 22 1% !930 6 <br /> 5242 09/20/2004 A 00-ccv ug/L 1000 107% 70-130 <br /> n-Propylbenzene 524 2 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 860% 85-152 <br /> BSD ug/L 1000 85 7% 85-152 <br /> BSRPD ug/L 04% --515 G <br /> 5242 09/20/2004 A 00-ccv ug/L 1000 879% 70-130 <br /> Styrene 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 802% 85-149 435 <br /> BSD ug/L 1000 885% 85-149 <br /> BSRPD ug/L 99% 516 8 <br /> 5242 09/20/2004 A 00-ccv ug/L 1000 844% 70-130 <br /> Teri amyl methyl Ether (TAME) 5242 09/20/2004 A209 Blank ug/L ND <3 <br /> BS ug/L 1000 83 9% 67-129 <br /> BSD ug/L 1000 105% 67-129 <br /> BSRPD ug/L 22 53 00 <br /> 5242 09/20/2004 A 00-ccv ug/L 1000 840% 70-130 <br /> 1,l 1 2-Tetrachloroethane 524 2 09/20/2004 A209 Blank ug/L ND <05 <br /> Report continued on next page <br /> STK436509 Quality Control Page 6 <br /> I <br />