NYC-WTC_000199039

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- Bl2- 607-6444

Method 8290 Blank Analysis Results Client - ATC

Lab Sample ID BLANK-1606 Matrix WIPE Filename F20506B_02 Dilution NA Total Amount Extracted 1 m2 Extracted 04/30/2002 ICAL Date 05/04/2002 Analyzed 05/06/2002 20:44 CCal Filename(s) F20506A_13 & F20506B_14 Injected By MRO

Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recoveiy 2.3.7.8-TCDF ND — 0.0025 A 2,3,7,8-TCDF-13C 2.00 96 Total TCDF ND — 0.0020 2,3,7,8-TCDD-13C 2.00 89 1,2,3,7,8-PeCDF-13C 2.00 89 2,3,7,8-TCDD ND 0.0053 A 2,3,4,7,8-PeCDF-13C 2.00 89 Total TCDD ND 0.0020 1,2.3,7,8-PeCDD-13C 2.00 85 1,2,3,4,7,8-HxCDF-13C 2.00 120 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 114 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 115 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 111 1,2,3,4,7,8-HxCDD-13C 2.00 117 1,2,3,7,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 116 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 113 1,2,3,4,7.8.9-HpCDF-13C 2.00 126 1,2,3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 100 1,2,3,6,7.8-HxCDF ND 0.0100 OCDD-13C 4.00 117* 2,3,4,6.7,8-HxCDF ND 0.0100 1,2,3,7,8,9-HxCDF ND 0.0100 1,2,3,4-TCDD-13C 2.00 NA Total HxCDF ND 0.0100 1,2,3,7,8,9-HxCDD-13C 2.00 NA

1,2,3,4,7,8-HxCDD ND 0.0100 2.3,7,8-TCDD-37CI4 0.20 95 1,2,3,6,7,8-HxCDD ND 0.0100 1,2,3,7,8,9-HxCDD ND 0.0100 Total HxCDD ND 0.0100

1,2,3,4,6,7,8-HpCDF ND 0.0100 Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF ND 0.0100 Equivalence: 0.00 ng/m2 Total HpCDF ND 0.0100 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD ND 0.0100 Total HpCDD ND 0.0100 OCDF ND 0.0200 OCDD ND 0.0200

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.... 02-1056601

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

CITY_21MC100_003030912

NYC-WTC_000199039