NYC-WTC_000228701

NYC 9/11 Public Portal Document

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

Analytical Tel; 612-607-1700 Fax: 612- 607-6444

Method 8290 Blank Analysis Results Client - ATC ASSOCIATES

Lab Sample ID BLANK-1666 Matrix WIPE Filename F20617A_02 Dilution NA Total Amount Extracted 1 m2 Extracted 06/12/2002 ICAL Date 05/04/2002 Analyzed 06/17/2002 08:29 CCal Filename(s) F20616A_15 & F20617A_15 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 — 0.0053 A 2,3,7.8-TCDF-13C 2.00 20 P Total TCDF ND —- 0.0020 2,3,7.8-TCDD-13C 2.00 17P 1,2,3,7,8-PeCDF-13C 2.00 18P 2,3.7,8-TCDD ND 0.0050 A 2,3,4,7,8-PeCDF-13C 2.00 18P Total TCDD 0.025 0.0020 1,2,3,7,8-PeCDD-13C 2.00 16P 1,2,3,4,7,8-HxCDF-13C 2.00 23 P 1,2,3,7,8-PeCDF ND 0.0100 1,2.3.6.7,8-HxCDF-13C 2.00 29 P 2.3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 24 P Total PeCDF ND 0.0100 1,2.3.7.8,9-HxCDF-13C 2.00 24 P 1,2,3,4,7,8-HxCDD-13C 2.00 21 P 1,2,3,7.8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 24 P Total PeCDD ND 0.0100 1,2.3,4,6.7,8-HpCDF-13C 2.00 20 P 1,2,3,4.7,8,9-HpCDF-13C 2.00 17P 1,2.3,4.7,8-HxCDF ND 0.0100 1,2,3,4,6,7.8-HpCDD-13C 2.00 17P 1.2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 16P 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 20 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/ni2 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 2,3,7,8-3ubstituted isomers). I = Interference EMPC = Estimated Maximum Possible Cortcentration E = PCDE Interference LRL = Lower Reporting Limit ND = Not Detected J = Concentration detected is below ths 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.... 02-1058093

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

CITY_21MC100_002901384

NYC-WTC_000228701