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r <br /> r <br /> March 30, 2005 Lab ID STK531972 <br /> rGround Zero Analyses Customer 3-14996 <br /> Quality Control - Organic <br /> rLConstituent N ethod Date/ID Type Units Conc QC Data DQO Note <br />' 2-Chlorotoluene 5242 03/23/2005 A209 BS ug/L 1000 115% 64-131 <br /> SSD ug/L 1000 1070 64-131 <br /> BSRPD ug/L 7 3% :5216 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 113% 70-130 <br />' 4-Chlorotoluene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 118 0 67-129 <br /> BSD ug/L 10 00 101 0 67-129 <br />' BSRPD ug/L 15 00 520 2 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 109510 70-130 <br /> Di isopropyl ether (DIPE) 5242 03/23/2005 A209 Blank ug/L ND <3 <br />' BS ug/L 1000 997% 54-152 <br /> BSD ug/L 1000 90 70 54-152 <br /> BSRPD ug/L 0 90 53 00 <br />' <br /> 5242 03/23/2005 A 00-CCV ug/L 10 00 86 6`1 I 70-130 <br /> Dibromuchloromethane 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 10 00 112% 70-128 <br />' BSD ug/L 1000 91 % 70-128 <br /> BSRPD ug/L 204% S22 8 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 99 70 70-130 <br /> Dibromomethane 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 10 00 139% 70-134 435 <br /> BSD ug/L 10 00 112510 70-134 <br /> BSRPD ug/L 21 11b :526 1 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 118% 70-130 <br /> 1 2 Dichlorobenzene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 10 00 135% 67-133 435 <br />' BSD ug/L 10 00 114% 67-133 <br /> BSRPD ug/L 16 6-o 519 8 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 115% 70-130 <br />' 1,3 DLchlorobenzene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 127% 68-125 435 <br /> BSD uglL 10 00 108`70 68-123 <br /> BSRPD ug/L 16 1% 519 0 <br />' 5242 03/23/2005 A 00-CCV ug/L 1000 116`70 70-130 <br /> 1 4-D[chlorobenzene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 1220 65-132 <br /> BSD ug/L 1000 1047o 65-132 <br /> BSRPD ug/L 16 2L90 520 2 <br /> 5242 03/23/2005 A 00 CCV ug/L 10 00 111 010 70-130 <br /> t 2 Dichlorobtnzenc d4-Surrogaee 5242 03/23/2005 A209 Blank ug/L 10 00 97 710 70-130 <br /> Report continued an next page <br /> STK531972 Quality Control Page 3 <br />