NYC-WTC_000202108

NYC 9/11 Public Portal Document

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

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

/ Client" ATC

Lab Sample ID SPIKE-1485 Filename U20227A_02 Matrix WIPE Total Amount Extracted 1 Sample Dilution NA ICAL Date 02/26/2002 Extracted 02/19/2002 CCal Filename(s) U20227A_01 & U20227A_14 Analyzed 02/27/2002 08:58 Method Blank ID BLANK-1476 Injected By MASS

Native Qs Qm % Internal ng's Percent Added Recovery isomers Joso (ng) Rec. Standards 2,3,7,8-TCDF 0.20 0.19 97 2,3,7,8-TCDF-13C 2.00 82 2,3,7,8-TCDD-13C 2.00 77 1,2,3,7,8-PeCDF-13C 2.00 87 2,3,7.8-TCDD 0.20 0.20 98 2,3,4,7,8-PeCDF-13C 2.00 86 1,2,3,7,8-PeCDD-13C 2.00 82 1,2,3,4,7,8-HxCDF-13C 2.00 85 1,2,3,7,8-PeCDF 1.00 0.95 95 1,2,3,6,7,8-HxCDF-13C 2.00 77 2,3,4,7,8-PeGDF 1.00 0.97 97 2,3,4,6.7,8-HxCDF-13C 2.00 82 1,2,3.7,8,9-HxCDF-13C 2.00 91 1,2,3,4,7,8-HxCDD-13C 2.00 79 1,2,3,7,8-PeCDD 1.00 1.07 107 1,2,3,6,7,8-HxCDD-13C 2.00 80 1,2,3,4,6,7,8-HpCDF-13C 2.00 75 1,2,3,4,7,8,9-HpCDF-13C 2.00 74 1,2,3,4,7,8-HxCDF 1.00 0.96 96 1,2,3,4,6,7,8-HpCDD-13C 2.00 74 1,2,3,6,7,8-HxCDF 1.00 0.93 93 OCDD-13C 4.00 66 2,3,4,6,7,8-HxCDF 1.00 0.93 93 1,2,3,7.8,9-HxCDF 1.00 0.91 91 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 1.05 105 2,3.7,8-TCDD-37CI4 0.20 79 1.2,3,6,7,8-HxCDD 1.00 1.00 100 1,2,3.7,8,9-HxCDD 1.00 1.04 104

1,2,3,4,6,7,8-HpCDF 1.00 94 1,2,3.4,7,8,9-HpCDF 1.00 97

1,2,3,4,6,7,8-HpCDD 1.00 1.00 100

OCDF 2.00 1.96 98 OCDD 2.00 2.07 103

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.... 02-1053890

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

CITY_21MC100_005390269

NYC-WTC_000202114