NYC-WTC_000228701

NYC 9/11 Public Portal Document

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

^aceAnalytical Method 8290 Analysis Results Tel: 612-607-1700

Client - ATC ASSOCIATES Client's Sample ID ATC-0525-M833-DX2 Lab Sample ID 103579991 Filename F20617A_07 Injected By MRO Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 05/25/2002 ICAL Date 05/04/2002 Received 05/29/2002 CCal Filename(s) F20616A_15 & F20617A_15 Extracted 06/12/2002 Method Blank ID BLANK-1666 Analyzed 06/17/2002 12:04 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF 0.0026 0.0020 J 2,3.7,8-TCDF-13C 2.00 77 Total TCDF 0.0430 0.0020 2,3,7,8-TCDD-13C 2.00 66 1.2.3.7.8-PeCDF-13C 2.00 66 2,3,7,8-TCDD ND 0.0028 A 2,3,4,7,8-PeCDF-13C 2.00 65 Total TCDD 0.0800 0.0020 B 1,2,3,7,8-PeCDD-13C 2.00 59 1,2,3,4,7.8-HxCDF-13C 2.00 90 1,2,3.7,8-PeCDF ND 0.0100 1,2,3.6,7.8-HxCDF-13C 2.00 106 2,3,4,7.8-PeCDF ND 0.0100 2,3,4,6.7,8-HxCDF-13C 2.00 92 Total PeCDF ND 0.0100 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 0.0100 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 72 1.2,3,4,7,8.9-HpCDF-13C 2.00 57 1,2.3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 62 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 54 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 78 1,2.3,6,7,8-HxCDD ND 0.0100 1,2,3,7,8,9-HxCDD ND 0.0100 Total HxCDD 0.0160 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: 0.00030 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 0.0350 0.0200 J LRL = Lower Reporting Limit Cone = Concentration (Totals include 2,3,7,8-8ubstituted isomers) I = Interference EMPC = Estimated Maximum Possible Concentration E = PCDE Interference A = Detection Limit based on signal-to-noise measurement S = Saturated signal J = 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 NC = Not Calculated Nn = Value obtained from additional analysis • = Soo 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.

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NYC-WTC_000228703