NYC-WTC_000203505

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

yceAnaIvtical Tel. 612-607-1700 Fax- 612- 607-6444

Method 8290 Blank Analysis Results Client - ATC

Lab Sample ID BLANK-2640 Matrix WIPE Filename F30114A_04 Dilution NA Total Amount Extracted 1.00 m2 Extracted 01/09/2003 ICAL Date 11/25/2002 Analyzed 01/14/2003 10:40 CCal Filename(s) F30114A_01 &F30114A_14 Injected By MRO

Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.00200 2,3,7.8-TCDF-l3C 2.00 68 Total TCDF ND 0.00200 2,3.7,8-TCDD-13C 2.00 75 1,2,3,7,8-PeCDF-13C 2.00 67 2,3.7,8-TCDD ND 0.00200 2,3,4,7.8-PeCDF-13C 2.00 63 Total TCDD ND 0.00200 1,2.3,7.8-PeCDD-13C 2.00 70 1,2,3,4,7,8-HxCDF-13C 2.00 68 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 79 2,3,4.7,8-PeCDF ND 0.01000 2,3,4,6,7.8-HxCDF-13C 2.00 82 Total PeCDF ND 0.01000 1,2,3.7,8,9-HxCDF-13C 2.00 75 1,2,3,4,7,8-HxCDD-13C 2.00 79 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 86 Total PeCDD ND 0.01000 1,2,3,4,6,7,8-HpCDF-13C 2.00 81 1,2,3,4,7,8,9-HpCDF-13C 2.00 81 1,2.3,4,7,8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 80 1,2.3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 83 J 2,3,4,6,7,8-HxCDF ND 0.01000 1,2,3,7,8,9-HxCDF ND 0.01000 1,2,3,4-TCDD-13C 2.00 NA Total HxCDF ND 0.01000 1,2,3.7,8,9-HxCDD-13C 2.00 NA

1,2,3,4,7,8-HxCDD ND 0.01000 2,3,7,8-TCDD-37CI4 0.20 70 1,2,3,6,7,8-HxCDD ND 0.01000 1,2,3,7,8.9-HxCDD ND 0.01000 Total HxCDD ND 0.01000

1,2.3,4,6,7,8-HpCDF ND 0.01000 Total 2,3,7,8-TCDD 1,2,3,4,7.8,9-HpCDF ND 0.01000 Equivalence: 0.00 ng/m2 Total HpCDF ND 0.01000 (Using ITE Factors)

1,2,3.4,6,7,8-HpCDD ND 0.01000 Total HpCDD ND 0.01000

OCDF ND 0.02000 OCDD ND 0.02000

Cone = Concentration (Totals include 2,3,7,8-substituted isomers). I = Interference EMPC = Estimated Maximum Possible Concentration E = PCDE Interference LRL = Lower Reporting Limit ND = Not Detected J = Concentration detected is below the calibration range NA = Not Applicable P = Recovery outside of target range NC = Not Calculated A = Detection Limit based on signal-to-noise measurement • = See Discussion

Report No.... 1067456

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

CITY_21MC100_003058337

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