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I <br /> January 21, 2005 Lab ID STK438872 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' Constituent Method Date/ID Type Units Conc QC Data DQO Note <br /> l 2 1]1Cll,,,.lenzene d4-Surrogate 5241 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 />' Diehloroditluoromethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 96 1% 47-I43 <br /> BSD ug/L 1000 8t 7% 47-143 <br /> BSRPD ug1L 162% 533 5 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 156% 70-130 360 <br /> 1 1-Dichloroethane 524 2 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 55 6% 48-170 <br />' BSD ug/L 1000 72 6% 48-170 <br /> BSRPD ug/L 265% 521 2 410 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 77 5% 70-130 <br /> 1,2-Dtchloroethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 91 4% 60-160 <br /> BSD ug/L 10 00 127% 60-160 <br /> BSRPD ug/L 328% X24 2 410 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 96 1% 70-130 <br /> 1 1-DiLhloroethylene 524 2 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 10 00 562% 41-183 <br /> BSD ug/L 10 00 6991. 41-183 <br /> BSRPD ug/L 2t 7% 5 19 3 410 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 115% 70-130 <br />' cis 1,2-DiOloroethylene 5242 12/30/2004 A209 Blank uglL ND <0 5 <br /> BS uglL 1000 667% 55-156 <br /> BSD ug/L 10 00 892% 55-156 <br /> BSRPD ug/L 28 9% 526 8 410 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 75 4% 70-130 <br /> trans 1 2-Dichloroethylene 5242 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 680% 42-177 <br /> BSD ug/L 1000 890% 42-177 <br /> BSRPD ug/L 267% 520 4 410 <br /> 5242 12/30/2004 A 00-CCV ug/L 10 00 743% 70-130 <br /> Dichloromethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 653% 62-161 <br /> BSD ug/L 1000 800% 62-161 <br /> BSRPD ug1L 202% 5 19 3 410 <br /> 5242 12/30/2004 A 00-CCV uglL 1000 746% 70-130 <br /> l 2 Dichloropropane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> Report Lontinued on next page <br /> ISTK438872 Quality Control Page 4 <br />