NYC-WTC_000215001

NYC 9/11 Public Portal Document

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

^ace Analytical Method ____________ Laboratory 8290 Control Spike Results Tel: 612-607-1700 Fax' 612- 607-6444

Client - ATC

Lab Sample ID SPIKE-DUP-1336 Filename F20318B_03 Matrix WIPE Total Amount Extracted 1 Sample Dilution NA ICAL Date 01/24/2002 Extracted 03/12/2002 CCal Filename(s) F20318B_01 &F20318B_17 Analyzed 03/18/2002 17:18 Method Blank ID BLANK-1505 Injected By MASB

Native Qs - Qm % Internal ng's Percent Isomers (ng) (ng) Rec. Standards Added Recovery 2,3,7,8-TCDF 0.20 0.26 129 2,3,7,8-TCDF-13C 2.00 70 2,3,7.8-TCDD-13C 2.00 65 1,2,3,7,8-PeCDF-13C 2.00 74 2,3,7,8-TCDD 0.20 0.25 .125 2,3,4,7,8-PeCDF-13C 2.00 72 1,2,3,7,8-PeCDD-13C 2.00 71 1,2,3,4.7,8-HxCDF-13C 2.00 107 1,2,3,7,8-PeCDF 1.00 1.23 123 1,2,3,6,7,8-HxCDF-13C 2.00 81 2,3,4,7,8-PeCDF 1.00 1.25 125 2,3,4,6.7,8-HxCDF-13C 2.00 85 1,2,3,7,8,9-HxCDF-13C 2.00 84 1,2,3,4,7,8-HxCDD-13C 2.00 107 1,2,3,7,8-PeCDD 1.00 1.25 125 1,2,3,6,7,8-HxCDD-13C 2.00 73 1,2,3,4,6.7,8-HpCDF-13C 2.00 81 1,2,3,4,7,8,9-HpCDF-13C 2.00 77 1 ,2,3,4,7,8-HxCDF 1.00 1.25 125 1,2,3,4,6,7,8-HpCDD-13C 2.00 86 1,2.3,6,7,8-HxCDF 1.00 1.27 127 OCDD-13C 4.00 75 2,3,4,6,7,8-HxCDF 1.00 1.27 127 1,2,3,7,8.9-HxCDF 1.00 1.26 126 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 1.00 1.29 129 2,3,7,8-TCDD-37CI4 0.20 72 1,2.3,6,7,8-HxCDD 1.00 1.31 131 P 1,2,3,7,8,9-HxCDD 1.00 1.24 124

1,2,3,4,6,7,8-HpCDF 1.00 1.26 126 1,2.3,4,7,8.9-HpCDF 1.00 1.25 125

1,2,3,4,6,7,8-HpCDD 1.00 1.28 128

OCDF 2.00 2.17 109 OCDD 2.00 2.51 126

a 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 iJ ■ NA = Not Applicable * = See Discussion Report No.... 02-1054698

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

CITY_21MC100_002871448

NYC-WTC_000215004