PCDD/PCDF wipe sample results, PS 234M, Mar 2002

NYC 9/11 Public Portal Document

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

^ace Analytical Tel: 612-607-1700 Fax: 612- 607-6444

Method 8290 Blank Analysis Results Client - ATC

Lab Sample ID BLANK-1486 Matrix WIPE Filename U20302A_04 Dilution NA Total Amount Extracted 1 m2 Extracted 02/25/2002 ICAL Date 02/26/2002 Analyzed 03/02/2002 18;57 CCal Filename(s) U20302A_01 & U20302A_17 Injected By BAL

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-13C 2.00 74 Total TCDF ND 0.00200 2.3,7,8-TCDD-13C 2.00 67 1,2,3,7,8-PeCDF-13C 2.00 72 2,3,7,8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 74 Total TCDD ND 0.00200 1,2,3,7,8-PeCDD-13C 2.00 69 1,2,3,4,7,8-HxCDF-13C 2.00 67 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 61 2,3,4,7.8-PeCDF ND 0.01000 2,3,4,6,7,8-HxCDF-13C 2.00 60 Total PeCDF ND 0.01000 1,2,3.7,8,9-HxCDF-13C 2.00 71 1.2.3.4.7.8-HxCDD-13C 2.00 40 1,2.3.7.8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 66 Total PeCDD ND 0.01000 1.2,3,4,6.7,8-HpCDF-13C 2.00 60 1,2,3.4,7,8,9-HpCDF-13C 2.00 71 1,2.3.4.7.8-HxCDF ND 0.01000 1,2,3.4.6,7,8-HpCDD-13C 2.00 58 1,2,3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 69* 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 44 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.... 02-1054209

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_003444461

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177797