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i <br /> March 30, 2005 Lab ID STK531971 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> IConstituent Method Date/ID Type Units Conc QC Data DQO ,Note <br />' 1 1 1 2-T=achloroethane 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 12317a 70-130 <br />' 1,1 2 2-Tetrachloroethane 5242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 10 0o 157% 62-138 435 <br /> BSD ug/L 1000 128% 62-138 <br />' BSRPD ug/L 203% 5269 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 131,70 70-130 360 <br />' Tetrachloroethylene 1242 03/23/2005 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 103 CIO 62-116 <br /> 13SD ug/L 1000 97 Sao 62-116 <br /> BSRPD ug/L 5 0% 520 7 <br />' <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 103`b 70-130 <br /> Toluene 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 116% 59-124 <br /> lie <br /> BSD ug/L 1000 1075 59-124 <br /> BSRPD ug/L 8 2c6 :517 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 112"0 70-130 <br /> 1 2 3-Trichlorobenzene 5242 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-Tnchlorobenzene 5242 03/23/2005 A209 Blank ug/L ND <05 <br />' BS ug1L 1000 133% 67-140 <br /> BSD ug/L 1000 110i70 67-140 <br /> BSRPD ug/L 18 9% 520 1 <br /> 5242 03/23/2005 A 00-CCV ug/L 10 00 111% 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 94 816 63-145 <br /> BSRPD ug/L 35% 515 9 <br /> 5242 03/23/2005 A 00-CCV ug/L 1000 969% 70-130 <br /> 1 1 2-Trichloroethane 5242 03/23/2005 A209 Blank ug/L ND <0 5 <br />' BS ug/L 10 00 149% 63-131 435 <br /> BSD ug/L 1000 126 0 63-131 <br /> BSRPD ug/L 16 6% 525 5 <br /> 1524 2 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 /> Report continued on next page <br /> STK531971 Quality Control Paye 7 <br />