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March 30, 2005 Lab ID STK531972 <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 03/23/2005 A209 BS ug/L 1000 134 a 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 123% 70-130 <br />' 1,1,2,2-Tetrachloroethane 5242 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 2031* 5 26 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 131 io 70-130 360 <br />' Tetrachloroethylene 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 81; 62-116 <br /> BSRPD ug/L 5 0 nC 520 7 <br />' 5242 03/23/2005 A 00-CCV u2/L 10 00 103% 70-130 <br /> Toluene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 116 '0 59-124 <br /> • BSD ue/L 1000 107% 59-124 <br /> BSRPD ug/L 8 2`$ 5 17 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 10 00 112`''0 70-130 <br /> 1 2 3-Tnchlorobertzene 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/l, 1000 145 vo 64-152 <br /> BSD ug/L 1000 125% 64-152 <br /> BSRPD ug/L 14 9% 522 9 <br />' 5242 03/23/2005 A DO-CCV ug/L 1000 114 '0 70-130 <br /> 1,2 4-Tnchlorobenzene 5242 03/23/2005 A209 Blank ug/l, ND <0 5 <br /> BS ug/L I0 00 133% 67-140 <br /> 1 BSD uB/L 1000 110,70 67-140 <br /> BSRPD ug/L 18 91b 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 <05 <br /> BS ug/L 10 00 98 2% 63-145 <br /> BSD ug/L t0 00 94 Slo 63-I45 <br /> BSRPD ug/L 3 5% 515 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 96 9% 70-130 <br /> 1,1 2-Trichloroethane 5242 03/23/2005 A209 Blank uo/L ND <03 <br />' BS ug/L 1000 149% 63-131 435 <br /> BSD ug/L 1000 1260 63431 <br /> BSRPD ug/L 1660. 525 5 <br />' <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 130% 70-130 <br /> Trichloroethylene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> Report continued on next page <br /> STK531972 Quality of P Control �e 7 <br /> aD <br />