Laboratory analysis report appendix, World Trade Center

NYC 9/11 Public Portal Document

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

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Cii©nt • ATC I Client's Sample ID ATC-0318-150M-DX1 Lab Sample ID 103418828 Filename U20421A_09 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/18/2002 ICAL Date 04/16/2002 Received 03/26/2002 CCal Filename(s) U20421A_01 & U20421A_15 Extracted 04/05/2002 Method Blank ID BLANK-1556 Analyzed 04/21/2002 22:53 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.0023 A 2,3,7.8-TCDF-13C 2.00 71 Total TCDF ND 0.0020 2,3,7,8-TCDD-13C 2.00 69 1,2,3,7.8-PeCDF-13C 2.00 74 2,3,7,8-TCDD ND 0.0038 A 2,3,4,7,8-PeCDF-13C 2.00 74 Total TCDD 0.012 0.0020 B 1,2,3,7,8-PeCDD-13C 2.00 74 1,2,3,4,7,8-HxCDF-13C 2.00 92 1.2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7.8-HXCDF-13C 2.00 96 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 89 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 92 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 85 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 82 1,2,3,4,7,8,9-HpCDF-13C 2.00 89 J 1.2.3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 82 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 95 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 79 1,2,3,6.7,8-HxCDD ND 0.0100 1,2,3,7,8,9-HxCDD ND 0.0100 Total HxCDD 0.012 0.0100 J

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: 0.00023 ng/m2 Total HpCDF ND 0.0100 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.015 0.0100 J Total HpCDD 0.026 0.0100 J

OCDF ND 0.0200 OCDD 0.086 0.0200 BJ

LRL = Lower Reporting Limit Cone = Concentration (Totals include 2,3,7,8-substituted isomers) I = Interference EMPC = Estimated Maximum Possible Concentration E = PCDE Interference A = Detection Limit based on signal-to-noise measurement S = Saturated signal J s Concentration detected is below the calibration range ND = Not Detected B = Less than 10 times higher than method blank level NA = Not Applicable P = Recovery outside of target range ND - Not Calculated Nn = Value obtained from additional analysis ’ = See Discussion Report No.... 02-1055553

REPORT OF LABORATORY ANALYSIS 1 This report shall not be reproduced, except in full, I without the written consent of Pace Analytical Services, Inc. J

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