Laboratory analysis report appendix, World Trade Center

NYC 9/11 Public Portal Document

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414

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Lab Sample ID SPIKE-1568 Filename U20410B_19 Matrix WIPE Total Amount Extracted 1 m2 Dilution NA ICAL Date 04/10/2002 Extracted 04/05/2002 CCal Filename(s) U20410B_06 & U20410B_21 Analyzed 04/11/2002 09:35 Method Blank ID BLANK-1556 Injected By BAL

Native Qs Qm % Internal ng's Percent Isomers (ng) (ng) Rec. Standards Added Recovery J 2,3,7.8-TCDF 0.20 0.29 145 P 2,3,7,8-TCDF-13C 2.00 63 2,3,7,8-TCDD-13C 2.00 66 1,2,3,7,8-PeCDF-13C 2.00 62 2,3,7,8-TCDD 0.20 0.28 141 P 2,3,4,7,8-PeCDF-13C 2.00 63 1,2,3,7,8-PeCDD-13C 2.00 64 1,2,3,4,7,8-HxCDF-13C . 2.00 101 1,2,3,7,8-PeCDF 1.00 1.48 148 P 1,2,3,6,7,8-HXCDF-13C 2.00 97 2,3,4,7,8-PeCDF 1.00 1.50 150 P 2,3,4,6,7,8-HxCDF-13C 2.00 94 1,2,3,7,8,9-HxCDF-13C 2.00 88 1,2,3,4,7,8-HxCDD-13C 2.00 97 1,2,3,7,8-PeCDD 1.00 1.48 148 P 1,2,3,6,7,8-HxCDD-13C 2.00 89 1,2,3,4,6,7,8-HpCDF-13C 2.00 86 1,2,3,4,7,8,9-HpCDF-13C 2.00 76 1,2,3,4,7,8-HxCDF 1.00 1.51 151 P 1,2,3,4,6,7,8-HpCDD-13C 2.00 91 1,2,3,6.7,8-HxCDF 1.00 1.51 151 P OCDD-13C 4.00 80 2,3,4,6,7,8-HxCDF 1.00 1.48 148 P ’J 1,2,3,7,8,9-HxCDF 1.00 1.49 149 P 1,2,3,4-TCDD-13C 2.00 NA 1,2.3,7,8,9-HxCDD-13C 2.00 NA

] 1,2,3,4.7,8-HxCDD 1,2,3,6,7,8-HxCDD 1,2,3,7,8,9-HxCDD 1.00 1.00 1.00 1.48 1.49 1.38 148 P 149 P 138 P 2,3,7,8-TCDD-37Ci4 0.20 75

1,2,3,4,6,7,8-HpCDF 1.00 1.44 144 P 1,2,3,4.7,8.9-HpCDF 1.00 1.45 145 P

1,2,3,4,6,7,8-HpCDD 1.00 1.39 139 P

J OCDF OCDD 2.00 2.00 2.88 2.98 144 P 149 P

Qs = Quantity Spiked Qm = Quantity Measured Rec. = Recovery (Expressed as Percent) P = Recovery outside of target range X = Background subtracted value Nn = Value obtained from additional analysis NA = Not Applicable ’ = See Discussion Report No.... 02-1055553

REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.

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