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July 16, 2004 Lab ID SP 406529 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Constituent Method Date/ID Type Units Conc QC Data DQO Note <br />' 2-Chlorotoluene 5242 07/07/2004 A209 BS ug/L 1000 95 1% 83-155 <br /> BSD ug/L 1000 88 6% 83-155 <br /> BSRPD ug/L 70% 517 1 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 113% 70-130 <br /> I4-Chlorotoluene 5242 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 904% 87-146 <br /> BSD ug/L 1000 87 0% 87-146 <br />' BSRPD ug/L 3 8% 2g15 6 <br /> 5242 07/07/2004 A 00-CCV ug/L 10 00 110% 70-130 <br />' <br /> D,-Isopropyl ether (DIPE) 5242 07/07/2004 A209 Blank ug/L ND <3 <br /> BS ug/L 1000 98 2% 76-146 <br /> BSD ug/L 1000 91 3% 76-146 <br /> BSRPD ug/L 0 69 53 00 <br /> I <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 88 1% 70-130 <br /> Dibromochloromethane 5242 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 99 6% 82-143 <br /> BSD ug/L 1000 9% 82-143 <br /> 13 <br /> BSRPD ug/L 13 5% 519 4 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 976% 70-130 <br />' Dtbromomethane 524 2 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 100% 87-132 <br /> BSD ug/L 1000 89 1% 87-132 <br /> BSRPD ug/L 118% 519 3 <br />' 5242 07/07/2004 A 00-CCV ug/L 1000 101% 70-130 <br /> 1,2-Dichlorobenzene 524 2 07/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 103% 86-147 <br />' BSD ug/L 1000 945% 86-147 <br /> BSRPD ug/L 85% 29206 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 120% 70-130 <br />' 1,3-Dichlorobenzene 5242 67/07/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 976% 87-141 <br /> BSD ug/L 1000 895% 87-141 <br /> BSRPD ug/L 86% :916 2 <br />' 5242 07/07/2004 A 00-CCV ug/L 1000 115% 70-130 <br /> 1,4-Dichlorobenzene 5242 07/07/2004 A209 Blank ug/L ND <05 <br />' BS ug/L 1000 965% 86-146 <br /> BSD ug/L 1000 860% 86-146 <br /> BSRPD ug/L 11 6% 518 6 <br /> 5242 07/07/2004 A 00-CCV ug/L 1000 113% 70-130 <br /> 1 2 Dichlorobenzene-d4-Surrogate 5242 07/07/2004 A209 Blank ug/L 1000 88 8% 70-130 <br /> Report continued on next page <br /> SP 406529 Quality Control Page 3 <br /> 1 <br />