NYC-WTC_000194742

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-1546 Matrix WIPE Filename F20406A_07 Dilution NA Total Amount Extracted 1 m2 Extracted 04/01/2002 ICAL Date 01/24/2002 Analyzed 04/07/2002 00:15 CCal Fiiename(s) F20406A_03 & F20406A_19 Injected By BAL

Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery

,. J 2,3,7,8-TCDF ND 0.0025 A 2,3,7,8-TCDF-13C 2.00 65 Total TCDF ND 0.0020 2,3,7,8-TCDD-13C 2.00 57 1,2,3,7,8-PeCDF-13C 2.00 67 2,3,7,8-TCDD ND 0.0024 A 2,3,4,7,8-PeCDF-13C 2.00 63 Total TCDD ND 0.0020 1.2,3.7,8-PeCDD-13C 2.00 64 1,2,3,4,7,8-HxCDF-13C 2.00 89 1,2,3.7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 84 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 83 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 81 1,2,3,4,7,8-HXCDD-13C 2.00 91 1.2.3,7,8-PeCDD ND 0.0100 1,2,3,6,7.8-HxCDD-13C 2.00 76 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 70 1,2,3,4,7,8,9-HpCDF-13C 2.00 61 1,2,3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 77 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 70 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 61 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: 0.000025 ng/mi2 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 0.025 0.0200 J

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 = Mot Detected J - Concentration detected is below the calibration range NA = Not Applicable P = Recovery outside of target range NC = Mot Calculated A = Detection Limit based on signal-to-noise measurement * = See Discussion

Report No.... 02-1055249

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

CITY_21MC100_003096894

NYC-WTC_000194742