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March 30, 2005 Lab ID STK531970 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' E: <br /> Constltuent Method Date/ID Type Units Conc QC Data DQO :INO:t <br /> e <br />' 1 1,1,2-Tetrachloroethane 5242 03/23/2005 A209 BS ug/L 1000 134% 68-121 435 <br /> BSD ug/L 1000 115% 68-121 <br /> BSRPD ug/L 14 9% S17 5 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 123% 70-130 <br />' 1,1 2,2-Tetrachloroethane 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 157% 62-138 435 <br /> BSD ug/L 1000 128% 62-138 <br />' BSRPD ug/L 20 3% 526 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 131% 70-130 360 <br /> Te=chloroethylene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 103% 62-116 <br /> BSD ug/L 1000 97 8% 62-116 <br /> BSRPD ug/L 50% 520 7 <br />' <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 103% 1 70-130 <br /> Toluene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 10 00 116% 59-124 <br /> • BSD ug/L 1000 107% 59-124 <br /> BSRPD ug/L 8 2`'b s 1 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 112176 70-130 <br /> 1 2 3-Trichlorobenzene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 10 00 145`76 64-152 <br /> BSD ug/L 1000 1257o 64-I52 <br /> BSRPD ug/L 14 9 m 522 9 <br />' 5242 03/23/2005 A 00-CCV ug/L 1000 114% 70-130 <br /> 1 2 4-Trichlorobenzene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 13317a 67-140 <br />' BSD ug/L 1000 110% 67-140 <br /> BSRPD ug/L l8 9% 520 1 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 111% 70-130 <br />' 1,1,1-Trichloroethane 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 98 2% 63-145 <br /> BSD ug/L 1000 94 8% 63-145 <br /> BSRPD ug/L 3 5% 515 9 <br />' 5242 03/23/2005 A 00 CCV ug/L 10 00 969% 70-130 <br /> 1 1 2-Trichloroethane 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 149% 63-131 435 <br /> BSD ug/L 1000 126``/0 63-131 <br /> BSRPD ug/L 16 6r5 525 5 <br /> 5242 03/23/2005 A 00 CCV ug/L 10 00 13017a 70-130 <br /> 1 Trichloroethylene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> Report continued on Wert page <br /> STK531970 Quality Control Page 7 <br />