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NYC-WTC_000223180

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NYC 9/11 Public Portal Document race «naiyiicai services, iiw; 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 ASSOCIATES

Lab Sample ID SPIKE-DUP-1429 Filename U20605A_17 Matrix WIPE Total Amount Extracted 1 m2 Dilution NA ICAL Date 04/16/2002 Extracted 05/31/2002 CCal Filename(s) U20605A_03 & U20605A_18 Analyzed 06/06/2002 05:46 Method Blank ID BLANK-1649 Injected By BAL

Native Qs Qm % Internal ng's Percent Isomers (ng) (ng) Rec. Standards Added Recovery 2,3,7,8-TCDF 0.20 0.22 112 2.3,7,8-TCDF-13C 2.00 64 2,3,7,8-TCDD-13C 2.00 67 1,2,3,7,8-PeCDF-13C 2.00 67 2,3.7,8-TCDD 0.20 0.21 106 2,3.4,7.8-PgCDF-13C 2.00 66 1,2,3,7,8-PeCDD-13C 2.00 70 1,2,3,4,7,8-HxCDF-13C 2.00 83 1,2,3,7,8-PeCDF 1.00 1.11 111 1,2,3,6.7,8-HxCDF-13C 2.00 80 2,3,4,7,8-PeCDF 1.00 1.14 114 2.3,4.6,7,8-HxCDF-13C 2.00 79 1,2,3,7,8,9-HxCDF-13C 2.00 83 1,2,3.4.7,8-HxCDD-13C 2.00 80 1,2,3,7,8-PeCDD 1.00 1.13 113 1,2,3,6,7,8-HxCDD-13C 2.00 78 1,2,3,4,6,7,8-HpCDF-13C 2.00 84 1,2,3.4,7,8,9-HpCDF-13C 2.00 90 1,2,3,4,7,8-HxCDF 1.00 1.09 109 1,2,3,4,6,7,8-HpCDD-13C 2.00 98 1,2,3,6,7,8-HxCDF 1.00 1.11 111 OCDD-13C 4.00 90 2,3,4,6,7,8-HxCDF 1.00 1.10 110 1,2,3,7,8,9-HxCDF 1.00 1.09 109 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 1.16 116 2,3,7,8-TCDD-37CI4 0.20 71 1,2,3,6,7,8-HxCDD 1.00 1.08 108 1,2,3,7,8,9-HxCDD 1.00 1.15 115

1.2,3.4.6,7,8-HpCDF 1.00 1.07 107 1,2,3,4,7,8,9-HpCDF 1.00 1.04 104

1,2,3,4,6,7,8-HpCDD 1.00 1.01 101

OCDF 2.00 2.21 111 OCDD 2.00 2.19 109

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.... 02-1057493

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

CITY_21MC100_002889442

NYC-WTC_000223180

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NYC-WTC_000223180Source: NYC Law Department, mirrored locally

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