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larch 30, 2005 Lab ID STK531969 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Conc QC Data DQO Nate <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 149% 517 5 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 123175 70-130 <br />' 1 1,2,2-Tetrachloroethane 524 2 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 157% 62-138 435 <br /> BSD ug/L 1000 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 />' <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 103% 70 130 <br /> Toluene <br /> 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 11617c 59-124 <br /> BSD ug/L 1000 1079 59-124 <br /> BSRPD ug/L 8 2% r 17 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 112% 70-130 <br /> 1,2 3-Trtehlorobenzene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 10 00 145% 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 10 00 114% 70-130 <br /> 1 2 4-Trtchlorobenzene 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 /> 5242 03/23/2005 A 00-CCV ug/L 1000 111% 70-130 <br /> I 1,1 I-Trichloroethane 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 982% 63-145 <br /> BSD ug/L 1000 94 8% 63-145 <br /> BSRPD uglL 3 5% :515 9 <br /> I5242 03/23/2005 A 00-CCV ug/L 10 00 96 9% 70-130 <br /> 1 1 2-Trichloroethane 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 1.49% 63-131 435 <br /> BSD ug/L 1000 1269 63-131 <br /> BSRPD ug/L 166% 525 5 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 130% 70-130 <br /> Trichloroethylene 5242- <br /> 242 03/23!2005 A209 Blank ug/L ND <0 5 <br /> Report continued an next page <br /> STK531969 Quality Control 7 <br /> Page <br />