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• March 31, 2004 Lab ID STK431887 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Cozlstltuent Method Date/ID Type Umts Conc. FQC Data DQO Note <br /> 1,1,1,2-Terrachloroethane 5242 03/23/2004 A209 BS ug/L 1000 98 7% 77-138 <br /> BSD ug/L 1000 975% 77-138 <br /> BSRPD ug/L 12% 2515 8 <br /> 5242 03/23/2004 A 00-CCV ug/L 1000 105% 70-130 <br /> 1 1,2 2-Tetrachloroethane 5242 012312004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 102% 79-147 <br /> BSD ug/L 1000 96 8% 79-147 <br /> BSRPD ug/L 49% 525 9 <br /> 5242 03/23/2004 A 00-CCV ug/L 1000 113% 70-130 <br /> Tetrachloroethylene 5242 03/23/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 91 1% 71-136 <br /> BSD ug/L 1000 85 1% 71-136 <br /> BSRPD ug/L 6 8% 514 7 <br /> 524 2 012312004 A 00-CCV ug/L 1000 802% 70-130 <br /> Toluene 524 2 03/23/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 99 8% 78-126 <br /> BSD ug/L 1000 929% 78-126 <br /> BSRPD ug/L 7 1% 5 I6 4 <br /> 524 2 03/23/2004 A 00-CCV ug/L 1000 936% 70-130 <br /> 1,2,3-Tnchlorobenzene 5242 03,23/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 98 3% 74-151 <br /> BSD ug/L 1000 974% 74-151 <br /> BSRPD ug/L 09% 525 4 <br /> 524 2 0123/2004 A 00-CCV ug/L 1000 108% 70-130 <br /> 1 2,4-Tnchlorobenzene 5242 03/23/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 I01% 74-152 <br /> BSD ug/L 1000 960% 74-152 <br /> BSRPD ug/L 5 2% X21 7 <br /> 524 2 0323/2004 A 00-CCV ug/L 1000 105% 70-130 <br /> 1,1 I-Trichloroethane 5242 03,23/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 101% 84-144 <br /> BSD ug/L 1000 108% 84-144 <br /> BSRPD ug/L 71% 517 8 <br /> 5242 03/23/2004 A 00 CCV ug/L 1000 105% 70-130 <br /> 1 12-Tnchloroethane 524 2 03/23/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 882% 80-132 <br /> BSD ug/L 1000 91 8% 80-132 <br /> BSRPD ug/L 40% 520 0 <br /> 5242 03 2312004 A 00-CCV ug/L 1000 95 8% 70-130 <br /> Trichloroethylene 524 2 0323/2004 A209 Blank ug/L ND <0 5 <br /> Report continued on next page <br /> STK431887 Quality Control Page 7 <br />