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r <br /> r <br /> March 30 2005 TK531973 <br /> r Lab ID S <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> r -T <br /> Constlt>lent IViethOd Date/ID Type Units Conc QC Data DQC Note <br /> r 1 1 1,2-Tetrachloroethane 5242 03/23/2005 A209 BS ug/L 1000 134975 68-121 435 <br /> BSD ug/L 1000 115% 68-I21 <br /> BSRPD ug/L 14 9% 517 5 <br /> r5242 03/23/2005 A 00-CCV ug/L 1000 123% 70-130 <br /> 1.12 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 I000 128% 62-138 <br /> BSRPD ug/L 203% 526 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 131% 70-130 360 <br />' Tetrachloroethylene 5242 03/23/2005 A209 Blank ug/L ND <05 <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 /> r524 2 03/23/2005 A 00-CCV ug/L 1000 103% 70-130 <br /> Toluene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> B5 ug/L 1000 116% 59-124 <br /> BSD ug/L 1000 107% 59-124 <br /> BSRPD ug/L 82% 5 17 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 112% 70-130 <br /> 1,2,3-Trichlorobenzene 524 2 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 145% 64-152 <br /> BSD ug/L 1000 125% 64-152 <br /> BSRPD ug/L 149% 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 133% 67-140 <br /> BSD ug/L 1000 110% 67-140 <br /> BSRPD ug/L 18 9% 520 1 <br />' 524 2 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 <05 <br /> BS ug/L 1000 982% 63-145 <br />' BSD ug/L 1000 948% 63-145 <br /> BSRPD ug/L 3 5% --5159 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 969% 70-130 <br />' 1,1 2-Trichloroethane 524 2 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% 63-131 <br /> BSRPD ug/L 166% 525 5 <br /> r5242 03/23/2005 A 00-CCV ug/L 1000 130% 70-130 <br /> Trichloroethylene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> rReport continued on next page <br /> STK531973 Quality Control Page 7 <br /> I <br />