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1 <br /> September 28, 2004 Lab ID STK436509 <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 Dtchlorobenzene-d4 Surrogate 5242 09/20/2004 A209 BS ug/L 1000 118% 70-130 <br />' BSD ug/L 1000 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 <0 5 <br /> BS ug/L 1000 957% 32-250 <br /> BSD ug/L 1000 85 6% 32-250 <br /> BSRPD ug/L 112% 516 4 <br />' 5242 09/20/2004 A 00-CCV ug/L 1000 772% 70-130 <br /> 1,1 Dtchloroethane 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 102% 75-142 <br />' BSD ug/L 1000 110% 75-142 <br /> BSRPD ug/L 7 3% 518 7 <br /> 524 2 09/20/2004 A 00-CCV ug/L 1000 99 9% 70 130 <br />' 1 2 Dtchloroethane 524 2 09/20/2004 A209 Blank ug/L ND <0 5 <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-I30 <br /> 1 I-Dtchloroethylene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br />' BS ug/L 1000 100% 56-163 <br /> BSD ug/L 10 00 107% 56-163 <br /> BSRPD ug/L 6 5% 524 0 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 93 1% 70-130 <br />' cts-I 2-Dtchloroethylene 5242 09/20/2004 A209 Blank ug/L ND <0 5 <br /> BS ug/L 1000 714% 76-148 435 <br /> BSD ug/L 1000 910% 76 148 <br /> BSRPD ug/L 24 1% s 30 2 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 728% 70-130 <br /> trans-1,2-Dtchloroethylene 524 2 09/20/2004 A209 Blank ug/L ND <0 5 <br /> I BS ug/L 1000 929% 82-133 <br /> BSP ug/L 10 00 101% 82-133 <br /> BSRPD ug/L 86% 523 3 <br /> I <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 88 1% 70-130 <br /> Dichloromethane 524 2 09/20/2004 A209 Blank ug/L ND <05 <br /> BS ug/L 1000 104% 77-144 <br /> BSD ug/L 1000 114`10 77-144 <br /> IBSRPD ug/L 94% 521 3 <br /> 5242 09/20/2004 A 00-CCV ug/L 1000 103% 70-130 <br /> 09/20/2004 A209 Blank ug/L ND <0 5 <br /> 1 2-DILhIoropropane 524 2: <br /> Report continued on next page <br /> ISTK436509 Quality Control Page 4 <br />