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PCDD/PCDF lab report, PS234M, April 2002

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Laboratory report for PCDDs and PCDFs analysis of wipe samples from PS234M collected March 19, 2002.

NYC-WTC_000177775
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NYC 9/11 Public Portal Document

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

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

Client - ATC

Lab Sample ID SPIKE-1564 Filename U20408_06 Matrix WIPE j Total Amount Extracted 1 Sample Dilution NA ICAL Date 03/25/2002 Extracted 04/03/2002 CCal Filename(s) U20408_05 & U20408_20 Analyzed 04/08/2002 17:52 Method Blank ID BLANK-1552 Injected By CVS

Native Qs Qm % Internal ng's Percent Isomers (ng) (ng) Rec. Standards Added Recovery 2,3,7,8-TCDF 0.20 0.20 100 2,3.7,8-TCDF-13C 2.00 60 2,3,7,8-TCDD-13C 2.00 51 1,2,3,7.8-PeCDF-13C 2.00 66 2.3,7,8-TCDD 0.20 0.22 110 2,3.4.7,8-PeCDF-13C 2.00 69 1.2,3,7,8-PeCDD-13C 2.00 64 1,2,3,4,7,8-HxCDF-13C 2.00 110 1,2,3,7,8-PeCDF 1.00 1.01 101 1,2,3,6.7,8-HxCDF-13C 2.00 99 2,3,4,7,8-PeCDF 1.00 1.01 101 2,3,4,6,7,8-HxCDF-13C 2.00 85 1,2,3,7,8,9-HxCDF-13C 2.00 71 1,2,3,4,7,8-HxCDD-13C 2.00 115 1,2,3,7,8-PeCDD 1.00 1.17 117 1,2,3,6,7,8-HxCDD-13C 2.00 90 1,2,3,4,6,7,8-HpCDF-13C 2.00 94 1,2,3,4,7,8,9-HpCDF-13C 2.00 74 1,2,3,4.7,8-HxCDF 1.00 1.07 107 1.2,3,4,6,7,8-HpCDD-13C 2.00 79 1,2.3,6,7,8-HxCDF 1.00 0.99 99 OCDD-13C 4.00 69 2,3.4,6.7,8-HxCDF 1.00 1.05 105 1,2,3,7.8,9-HxCDF 1.00 1.03 103 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 1.07 107 2,3.7.8-TCDD-37CI4 0.20 61 1,2,3,6,7,8-HxCDD ' 1.00 1.04 104 1,2,3,7,8,9-HxCDD 1.00 0.88 88

1.2.3,4.6.7.8-HpCDF 1.00 1.04 104 1,2,3.4.7,8,9-HpCDF 1.00 1.04 104 i 1,2,3,4.6.7,8-HpCDD 1.00 1.06 106

OCDF 2.00 2.27 114 OCDD 2.00 2.19 110

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.... 02-1055552

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

CONFIDENTIAL, CITY_21MC100_003444364

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177775

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NYC-WTC_000177775Source: NYC Law Department, mirrored locally

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