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r <br /> January 02, 2004 Lab ID STK338055 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Constituent Method Date/ID Type Units Cone QC Data DQO Note <br /> 1 1 1 2 Tetrachloroethane 5242 12/19/2003 A209 BS ug/L 1000 108% 77-138 <br /> BSD ug/L 1000 990% 77-138 <br /> BSRPD ug/L 8 7% 515 8 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 97 6% 70-130 <br /> 1.12 2-Tetrachloroethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 116 c 79-147 <br /> BSD ug/L 1000 114 '0 79-147 <br /> BSRPD ug/L 2 5% 1 525 9 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 100% 70-130 <br /> Tetrachloroethylene 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 111% 71-136 <br /> BSD ug/L 1000 105% 71-136 <br /> BSRPD ug/L 64% 514 7 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 105 ti 70-130 <br /> Toluene 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> B5 ug/L 1000 107 78-126 <br /> BSD ug/L 1000 996% 78-126 <br /> BSRPD ug/L 74% :s 16 4 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 102% 70-130 <br /> 1,2,3-Trtchlorobenzene 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 1160E 74-151 <br /> BSD ug/L 1000 1139, 74-151 <br /> BSRPD ug/L 2 5% 5 25 4 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 105`, 70-130 <br /> 1 2 4-Trtchlorobenzene 5242 12/19/2003 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 114-r 74-152 <br /> SSB ug/L 1000 109% 74-152 <br /> BSRPD ug/L 4 4% 521 7 <br /> 5242 12/I9/2003 A 00-CCV ug/L 1000 105% 70-130 <br /> l,l 1-Trichloroethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 1165o 84-144 <br /> BSD ug/L 1000 109% 84-144 <br /> BSRPD ug/L 60% 517 8 <br /> 5242 12/19/2003 A 00-CCV ug/L 1000 113% 70-130 <br /> 1,1,2-Trichloroethane 5242 12/19/2003 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 113% 80-132 <br /> BSD ug/L 1000 1111-0 80-132 <br /> BSRPD ug/L 2 1% 520 0 <br /> 5242 12/19/2003 A 00 CCV ug/L 1000 102% 70-130 <br /> . Trichloroethylene 524 2 12/19/2003 A209 Blank ug/L ND [0 5 <br /> Report continued on next page <br /> STK338055 Quality Control Page 7 <br />