NYC-WTC_000223168

NYC 9/11 Public Portal Document

Pace Analytical Services, Inc. 1700 Elm Street - Suita 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-1581 Matrix WIPE Filename U20425A_07 Dilution NA Total Amount Extracted 1 m2 Extracted 04/19/2002 ICAL Date 04/16/2002 Analyzed 04/25/2002 02:21 CCal Filename(s) U20425A_01 &U20425A_16 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 68 Total TCDF ND 0.00200 2,3,7,8-TCDD-13C 2.00 69 1,2.3,7,8-PeCDF-13C 2.00 69 2,3.7,8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 67 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 89 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 83 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 90 1,2,3,4,7,8-HxCDD-13C 2.00 85 1,2,3,7.8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 83 Total PeCDD ND 0.01000 1,2,3,4,6,7.8-HpCDF-13C 2.00 82 1,2,3,4,7.8,9-HpCDF-13C 2.00 95 1,2,3,4,7,8-HxCDF ND 0.01000 1,2,3,4.6,7,8-HpCDD-13C 2.00 91 1,2,3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 97 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-HxCbD-13C 2.00 NA 1,2,3,4.7,8-HxCDD ND 0.01000 2,3,7.8-TCDD-37CI4 0.20 76 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.... 02-1056080

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

CITY_21MC1OO_OO2889395

NYC-WTC_000223168