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January 21, 2005 Lab ID STK438871 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Conc QC Data DQO Note <br /> 1 2 Dichlorobenzene d4 Surrogate 524 2 12/30/2004 A209 BS ug/L 1000 82 9% 70-130 <br />' BSD ug/L 1000 874% 70-130 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 93 1% 70-130 <br />' Dichlorodifluoromethane 5242 12/30/2004 A209 Blank uglL ND <05 <br /> BS ug/L 1000 96 1% 47-143 <br /> BSD ug/L 1000 81 7% 47-143 <br /> BSRPD ug/L 162% 5335 <br />' 5242 12/30/2004 A 00-CCV ug/L 1000 156% 70-130 360 <br /> 1 1-Dichloroethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS uglL 1000 55 6% 48-170 <br />' BSD ug/L 1000 726% 48-170 <br /> BSRPD ug/L 265% 521 2 410 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 775% 70-130 <br /> 1 2 Dichloroethane 5242 12/30/2004 A209 Slant, ug/L ND <0 5 <br /> BS ug/L 1000 914% 60-160 <br /> BSD ug/L 10 00 127` 60-160 <br /> BSRPD ug/L 32 8% 524 2 410 <br /> 524 2 12/30/2004 A 00 CCV ug/L 1000 96 1% 70-130 <br /> 1 I-Dichloroethylene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 56 2°6 41-183 <br /> BSD ug/L 1000 69 9% 41-183 <br /> 13SRPD ug/L 2t 7% 519 3 410 <br /> 5242 12/30/2004 A 00 CCV ug/L 1000 11570 70-130 <br /> cis-I 2-Dtchloroethylene 524 2 12/30/2004 A209 Blank ug/L ND <05 <br /> BS uglL 1000 667% 55-156 <br /> BSD ug/L 1000 89 2% 55-156 <br /> BSRPD ug/L 28 9% 526 8 410 <br /> 5242 12/30/2004 A 00-CCV uglL 1000 75 4% 70-130 <br /> trans-1 2-Dtchloroethylene 5242 12/30/2004 A209 Blank uglL ND <05 <br /> BS ug/L 1000 68 0% 42-177 <br /> BSD ug/L 1000 890% 42-177 <br /> BSRPD ug/L 267% 520 4 410 <br /> 524 2 12/30/2004 A 00 CCV ug/L 1000 74 3% 70-130 <br /> Duhloromethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 65 3% 62-161 <br /> BSD ug/L 10 00 800% 62-161 <br />' BSRPD ug/L 202% <_19 3 410 <br /> 5242 12/30/2004 A 00-CCV uglL 1000 746% 70-130 <br /> 1 2 Dtchloropropane 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> Report Lontmued on next pagL <br /> ISTK438871 Quality Control Page 4 <br />