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September 28, 2004 Lab ID STK436504 <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 2 D,chiorOhenzene-d4-Surrogate 524 2 09/20/2004 A209 BS ug/L 1000 118%' 70-130 BSD ug/L 10 00 124% 70-130 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 126% 70-130 <br />' Dichlorodifluoromethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 95 7% 32-250 <br /> BSD ug/L 1000 85 6% 32-250 <br /> BSRPD ug/L 11 2% <_16 4 <br />' 524 2 09/20/2004 A 00-CCV ug/L 1000 77 2% 70-130 <br /> 1 1-Dechloroethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 102% 75-142 <br />' BSD ug/L 1000 110% 75-142 <br /> BSRPD ug/L 7 3% 5 18 7 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 999% 70-130 <br />' 1 2 Dechloroethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 902% 73-153 <br /> BSD ug/L 1000 103% 73-153 <br /> BSRPD ug/L 13 1% :523 6 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 869% 70-130 <br /> 1 1-Drchloroethylene 5242 09/20/2004 A209 Blank ug/L ND <05 <br />' BS ug/L 1000 100% 56-163 <br /> BSD ug/L 1000 107% 56-163 <br /> BSRPD ug/L 65% 524 0 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 93 1% 70-130 <br />' <br /> cis-1 2-Dichloroethylene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 71 4% 76-148 435 <br /> BSD ug/L 1000 91 0% 76-148 <br /> BSRPD ug/L 24 1% 530 2 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 72 8% 70-130 <br /> trans-l,2-Dichloroethylene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 929% 82-133 <br /> BSD ug/L 1000 101% 82-133 <br /> BSRPD ug/L 8 6% 523 3 <br /> 5242 09/20/2004 A 00-CCV u8/L 1000 88 1% 70-130 <br />' Dichloromethane 5242 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 104% 77-144 <br /> BSD ug/L 1000 114% 77-144 <br />' BSRPD ug/L 94% s21 3 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 103% 70-130 <br /> 1 2 Dechloropropane 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> I <br /> Report continued on next page <br /> STK436504 Quality Control Page 4 <br />