NYC-WTC_000202221

NYC 9/11 Public Portal Document

Race Analiticai Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 'TW

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

Client - ATC

Lab Sample ID SPIKE-1623 Filename U20506A 01 Matrix WIPE Total Amount Extracted 1 m2 Dilution NA 1CAL Date 04/16/2002 Extracted 04/30/2002 CCal Filename(s) U20505B_16 & U20506A_15 Analyzed 05/06/2002 09:23 Method Blank ID BLANK-1606 Injected By CVS

Native Qs Qtn % Internal ng's Percent isomers (ng) (ng) Standards Added Recovery Rec.. 2,3,7,8-TCDF 0.20 0,21 104 2,3,7.8-TCDF-13C 2.00 64

I 2,3,7)8-TCDD-13C 2.00 1,2,3,7,8-PeCDF-13C 2.00 2,3,7,8-rCDD 0.20 0,19 96 2,3,4,7,8-PeCDF-13G 2.00 1,2,3,7,8-PeCDD-13C 2.00

I 1,2,3,4,7.8-HxCDF-13C 2.00 ' 1,2,3,7,8-PeCDF 1.00 1.06 106 1,2.3,6,7,8-HxCDF-13C 2.00 2,3,4,7.8-PeCDF 1.00 1.05 105 2,3,4,6,7,8-HxCDF-13C 2.00 1,2,3.7,8.9-HxCDF-13C 2.00 1,2,3,4,7,8-HxCDD-13C 2.00 80 1,2,3,7,8-PeCDD 1.00 0.96 96 1,2,3,6,7,8-HxCDD-13G 2.00 1.2,3,4,6,7,8-HpCDF-13C 2.00 1,2.3,4,7,8-HxCDF 1,2,3,6,7,8-HxCDF . 2,3,4.6,7,8-HxGDF 1.00 1-00 i:S 101 103 1,2,3.4,7.8,9-HpCDF-13C 1,2,3,4,6,7,8-HpCDD-13C OCDD-13C 2.00 2.00 4.00 / s 70 1.00 I 101 1,2,3,7,8,9-HxCDF 1.00 98 r 1,2,3.4-TCDD-13C Z ir 7-■2.00/2/'-' iZ/NAi///, 1,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3.4,7,8-HxCDD 1,00 2,3,7,8-TCDD-37CI4 < 0-2d 76 1,2,3,6,7,8-HxCDD 1,2,3,7,8,9-HxCDD 1.00 .IS 1.00 0.99 99

1,2,3,4,6.7,8-HpCDF 1.00 r 0,97 97 1,2,3,4,7,8,9-HpCDF 1.00 0,96 96

1:,2,3,4,6,7,8-HpCDD 1.00 0.99 99

OCDF 2.00 2.00 100 1 OCDD 2.00 2.02 101

Qs = Quantity Spiked Qm = Quantity Measured Rec, = Recovery (Expressed as Percent) j P = Recovery outside of target range X = Background subtracted value Nn = Value obtained from additional analysis NA = Not Applicable * = See Discussion Report NO.....02-1056603

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

CITy_21MC10 0_0 03 2'71055

NYC-WTC_000202225