NYC-WTC_000228701

NYC 9/11 Public Portal Document

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

we Analytical___________Method 8290 Laboratory Control Spike Results Tel: 612-607-1700 Fax: 612- 607-6444

Client - ATC ASSOCIATES

Lab Sample ID SPIKE-DUP-1442 Filename F20617A_14 Matrix WIPE Total Amount Extracted 1 m2 Dilution NA ICAL Date 05/04/2002 Extracted 06/12/2002 CCal Filename(s) F20616A_15 & F20617A_15 Analyzed 06/17/2002 17:49 Method Blank ID BLANK-1666 Injected By MRO

Native Qs Qm % Internal ng's Percent Isomers (ng) (ng) Standards Added Recovery Rec. 2,3,7.8-TCDF 0.20 0.23 114 2.3,7,8-TCDF-13C 2.00 68 2,3,7,8-TCDD-13C 2.00 55 1,2,3,7,8-PeCDF-13C 2.00 60 2,3,7,8-TCDD 0.20 0.22 110 2,3,4,7,8-PeCDF-13C 2.00 61 1,2,3,7,8-PeCDD-13C 2.00 53 1,2,3,4,7,8-HxCDF-13C 2.00 85 1.2,3,7,8-PeCDF 1.00 1.10 110 1,2,3,6,7,8-HxCDF-13C 2.00 108 2.3,4,7.8-PeCDF 1.00 1.14 114 2,3,4,6,7,8-HxCDF-13C 2.00 94 1,2,3,7,8,9-HxCDF-13C 2.00 77 1,2,3,4,7,8-HxCDD-13C 2.00 77 1,2,3,7.8-PeCDD 1.00 1.18 118 1,2,3,6,7,8-HxCDD-13C 2.00 86 1,2,3,4,6,7,8-HpCDF-13C 2.00 73 1,2,3,4,7,8,9-HpCDF-13C 2.00 53 1,2,3,4,7,8-HxCDF 1.00 1.06 106 1,2,3,4,6,7,8-HpCDD-13C 2.00 60 1,2,3.6,7.8-HxCDF 1.00 1.10 110 OCDD-13C 4.00 46 2.3,4,6,7,8-HxCDF 1.00 1.12 112 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 1.15 115 2,3,7,8-TCDD-37CI4 0.20 69 1,2,3,6,7,8-HxCDD 1.00 1.17 117 1.2,3,7,8.9-HxCDD 1.00 1.11 111

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 1.12 112

OCDF 2.00 2.45 122 OCDD 2.00 2.33 117

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 = NotApplicabte • = See Discussion Report No.... 02-1058093

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

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NYC-WTC_000228706