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January 21, 2005 Lab ID STK438874 <br />' Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br />' LConstituent Method DatelID i Type Units Cone QC Data DQONote <br />' <br /> l 2 Duhlorolenzene d4 Surrogate 1242 12/30/2004 A209 BS uglL 11111 82 9% 70-130 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 ug/L ND <0 5 <br /> BS ug/L 1000 96 1% 47-143 <br /> BSD ug/L 1000 81 7% 47-143 <br /> BSRPD ug/L 162% 533 5 <br /> T— <br />' 5242 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 <0 5 <br /> BS ug1L 1000 55 6% 48-170 <br /> t BSD uglL 1000 72 6% 48-170 <br /> BSRPD ug/L 265% S21 2 410 <br /> 524 2 12/30/2004 A 00-CCV ug/L 1000 77 5% 70-130 <br />' 1 2-Dichloroethane 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 91 4% 60-160 <br /> BSD ug/L 1000 127% 60-160 <br /> BSRPD ug/L 32 8-0 524 2 410 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 96 1% 70-130 <br /> 1 1-Dichloroethylene 5242 12/30/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 562% 41-183 <br /> BSD ug/L 1000 699% 41-183 <br /> BSRPD ug/L 21 7% S 19 3 410 <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 115% 70-130 <br />' cis-1 2-Dtchloroethylene 5242 12/30/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 66 7% 55-156 <br /> BSD ug/L 1000 89 2% 55-156 <br /> BSRPD ug/L 28 9% 526 8 410 <br />' 524 2 12/30/2004 A 00-CCV ug/L 1000 7:)4% 70-130 <br /> trans 1 2-Dtshloroethylene 524 2 12/30/2004 A209 Blanh ug/L ND <0 5 <br />' BS ug/L 1000 68 0% 42-177 <br /> BSD ug/L 1000 990% 42-177 <br /> BSRPD ug/L 267% 520 4 410 <br />' <br /> 5242 12/30/2004 A 00-CCV ug/L 1000 743% 70-130 <br /> Dichloromethane 524 2 12/30/2004 A209 Blankug/L ND <0 5 <br /> BS ug/L 1000 b 3% 62-161 <br /> BSD ug/L 1000 800% 62-161 <br />' BSRPD uglL 202% 2919 3 410 <br /> 5242 12/30/2004 A 00 CCV ug/L 1000 74 6% 70-130 <br /> l 2-Dtchloropropane 5242 12/30/2004 A209 Blank ug/L ND <05 <br /> Report continued on next page <br />' STK438874 Quality Control Page 4 <br />