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1 <br /> July 16, 2004 Lab ID SP 406520 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Conc QC Data DQO Note <br />' n-Butylbenzene 5242 07/02/2004 A209 BS ug/L 1000 94 2% 89-158 <br /> BSD ug/L 1000 115% 89-158 <br /> BSRPD ug/L 196% 515 3 410 <br /> 5242 07/02/2004 A 00-CCv ug/L 1000 103% 70-130 <br />' sec-Butylbenzene 5242 07/02/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 92 7% 92-147 <br /> SSD ug/L 1000 108% 92-147 <br />' BSRPD ug/L 15 4% 515 3 410 <br /> 5242 07/02/2004 A 00-CCv ug/L 1000 104% 70-130 <br /> tent-Butvlbenzene 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 97 1% 79-140 <br /> BSD ug/L 1000 109% 79-140 <br /> BSRPD ug/L 117% 515 8 <br />' <br /> 5242 07/02/2004 A 00-CCv ug/L 1000 102% 70-130 <br /> Carbon Tetrachloride 524 2 07/02/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 864% 80-151 <br /> BSD ug/L 1000 105% 80-151 <br /> BSRPD ug/L 190% 29206 <br /> 5242 07/02/2004 A 00-CCv ug/L 1000 929% 70-130 <br />' Chlorobenzene 5242 07/02/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 88 2% 74-134 <br /> BSD ug/L 1000 88 0% 74-134 <br /> BSRPD ug/L 0 3% 516 9 <br />' 5242 07/02/2004 A 00-CCv ug/L 1000 91 1% 70-130 <br /> Chloroethane 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 899% 80-173 <br />' BSD ug/L 1000 105% 80-173 <br /> BSRPD ug/L 167% 5I61 410 <br /> 5242 07/02/2004 A 00-CCv ug/L 1000 85 9% 1 70-130 <br />' Chloroform 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 106% 78-141 <br /> BSD ug/L 1000 910% 78-141 <br /> BSRPD ug/L 15 6% 517 6 <br />' 524 2 07/02/2004 A 00-CCv ug/L 1000 103% 70-130 <br /> Chloromethane 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 925% 68-165 <br /> BSD ug/L 1000 117% 68-165 <br /> BSRPD ug/L 232% 515 7 410 <br /> 524 2 07/02/2004 A 00-CCv ug/L 1000 83 5% 70-130 <br /> 2-Chlorotoluene 5242 07/02/2004 A209 Blank ug/L ND <0 5 <br />' Report continued on Wert page <br /> SP 406520 Quality Control Page 2 <br />