NYC-WTC_000215001

NYC 9/11 Public Portal Document

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

^ceAnalvticar_________ _Method 8290 Laboratory Control Spike Results Tel: 612-607-1700 Fax' 612- 607-6444

Client - ATC

Lab Sample ID SPIKE-1515 Filename F20318B_02 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 16:30 Method Blank ID BLANK-1505 Injected By MASS

Native '(KT- Qm % Internal ng's Percent Isomers (ng) (ng) Rec, Standards Added Recovery 2,3.7,8-TCDF 0.20 0.20 102 2,3,7,8-TCDF-13C 2.00 69 2,3,7,8-TCDD-13C 2.00 62 1,2,3.7,8-PeCDF-13C 2.00 70 2,3,7.8-TCDD 0.20 0.20 102 2,3,4,7,8-PeCDF-13C 2.00 69 1,2,3,7,8-PeCDD-13C 2.00 69 1,2,3,4,7,8-HxCDF-13C 2.00 104 1,2.3,7,8-PeCDF 1.00 1.02 102 1,2,3,6,7,8-HxCDF-13C 2.00 83 2,3,4,7,8-PeCDF 1.00 1.03 103 2,3,4,6,7.8-HxCDF-13C 2.00 84 1,2.3,7,8,9-HxCDF-13C 2.00 79 1,2,3,4,7,8-HxCDD-13C 2.00 99 1,2,3,7,8-PeCDD 1.00 1.00 100 1,2,3,6,7,8-HxCDD-13C 2.00 79 1.2,3,4,6,7,8-HpCDF-13C 2.00 82 1,2,3,4,7,8,9-HpCDF-13C 2.00 76 1,2,3,4,7,8-HxCDF 1.00 1.02 102 1,2,3,4,6,7,8-HpCDD-13C 2.00 88 1,2,3,6,7,8-HxCDF 1.00 1.03 103 OCDD-13C 4.00 69 2,3,4,6,7,8-HxCDF 1.00 1.04 104 1,2,3,7,8,9-HxCDF 1.00 0.99 99 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 1.04 104 2,3,7,8-TCDD-37CI4 0.20 68 1,2,3,6,7,8-HxCDD 1.00 1.05 105 1,2,3,7.8.9-HxCDD 1.00 0.93 93

1,2,3.4,6,7,8-HpCDF 1.00 1.03 103 1,2,3,4,7,8,9-HpCDF 1.00 1.03 103

1,2.3,4.6,7,8-HpCDD 1.00 1.01 101

ia OCDF 2.00 1.72 86 OCDD 2.00 2.10 105

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.... 02-1054698

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

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NYC-WTC_000215003