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1 <br /> January 21, 2005 Lab ID STK438875 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Cone QC Data DQO Note <br />' 2-Chlorotoluene 5242 12/30/2004 A209 BS ug/L 1000 82 7% 64-131 <br /> BSD ug/L 1000 9207o 64-131 <br /> BSRPD ug/L 106% 521 6 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 103% 70-130 <br />' 4-Chlorotoluene 5242 12130/2004 A209 Blank ug/L ND <0 5 <br /> B5 ug/L 1000 83 5% 67-129 <br /> BSB ug/L 1000 949% 67-129 <br />' BSRPD ug/L 127% 520 2 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 103% 70-130 <br /> Di-isopropyl ether (DIPS) 5242 12/30/2004 A209 Blank ug/L ND <3 <br />' BS ug/L 1000 55 6% 54-152 <br /> BSD ug/L 1000 70 1% 54-152 <br /> BSRPD ug/L 1 5 53 00 <br />' <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 71 0% 70-130 <br /> Dibromochloromethane 5242 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 970% 70-128 <br /> BSD ug/L 1000 121% 70-128 <br /> BSRPD ug/L 22 4% 522 8 <br /> 5242 12/30!2004 A 00-CCV ug/L 1000 109% 70-130 <br />' Dibromomethane 524 2 12/30/2004 A209 Blank ug1L ND <0 5 <br /> BS ug1L 1000 88 5% 70-134 <br /> BSD ug/L 1000 122% 70-134 <br /> BSRPD ug/L 318% 5261 410 <br />' <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 96 7% 70-130 <br /> 1 2-Dichlorobenzene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 869% 67-133 <br />' BSD ug/L 1000 98 9% 67-133 <br /> BSRPD ug1L t2 9% 519 8 <br /> I <br /> 524 2 12/30/2004 A 00 CCV ug/L 10 00 10450 70-130 <br />' 1 3-Dichlorobenzene 524 2 12/30/2004 A209 Blank ug1L ND <0 5 <br /> BS ug/L 1000 893% 68-125 <br /> BSD ug/L 1000 98 8% 68-125 <br /> BSRPD ug/L 10 1% -.-190 <br />' 524 2 12/30/2004 A 00-CCV ug/L 1000 109% 70-130 <br /> 1 4-13ichlorobenzene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 90 1% 65-132 <br /> I BSD ug/L 1000 10510 65-132 <br /> BSRPD ug/L 15 5% 520 2 <br /> 5242 12/30/2004 A 00 CCV ug/L 1000 107% 70-130 <br /> 11 1 2 DiOlurobtnLLR.d4 SurmgaiL 524 2 12/30/2004 A209 Blank ug/L 10 00 77 9 0 70-130 <br /> Report c.ontinued on next page <br /> STK438875 Quality Control Page 3 <br />