NYC-WTC_000223243

NYC 9/11 Public Portal Document

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

^ace Analytical_________ Method 8290 Analysis Results Tel: 612-607-1700 Fax: 612- 607-6444

Client - ATC Client's Sample ID ATC-0410STY-DX1 Lab Sample ID 103468237 Filename F20429A_09 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE I % Moisture NA Dilution NA Dry Weight Extracted NA Collected 04/10/2002 ICAL Date 04/12/2002 Received 04/16/2002 CCal Filename(s) F20429A_01 & F20429A_15 Extracted 04/24/2002 Method Blank ID BLANK-1592 Analyzed 04/29/2002 16:47 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/in2 Standards Added Recovery 2,3,7,8-TCDF 0.0057 0.00200 J 2,3,7,8-TCDF-13C 2.00 71 Total TCDF 0.1300 0.00200 2,3,7,8-TCDD-13C 2.00 77 1,2,3,7,8-PeCDF-13C 2.00 88 2,3,7,8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 80 Total TCDD 0.3200 0.00200 B 1,2,3,7,8-PeCDD-13C 2.00 90 1,2,3.4,7,8-HxCDF-13C 2.00 91 1,2,3,7.8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 67 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6.7,8-HxCDF-13C 2.00 79 Total PeCDF 0.0110 0.01000 J 1,2,3,7,8,9-HxCDF-13C 2.00 75 1,2,3,4,7,8-HxCDD-13C 2.00 98 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6.7,8-HxCDD-13C 2.00 89 Total PeCDD 0.1000 0.01000 1.2,3.4,6.7,8-HpCDF-13C 2.00 83 1,2,3,4,7.8,9-HpCDF-13C 2.00 72 1,2,3,4,7.8-HxCDF ND 0.01000 1,2,3.4,6,7.8-HpCDD-13C 2.00 95 1,2,3,6.7,8-HxCDF ND 0.01000 OCDD-13C 4.00 63 ( 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-HXCDD-13C 2.00 NA

I 1,2,3,4,7,8-HxCDD ND 0.01000 2,3,7.8-TCDD-37CI4 0.20 87 1,2,3,6,7,8-HxCDD ND 0.01000 1,2,3,7,8,9-HxCDD ND 0.01000 Total HxCDD 0.0300 0.01000 J 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: 0.00082 ng/m2 Total HpCDF ND 0.01000 (Using ITE Factors) 1,2,3.4.6.7,8-HpCDD 0.0140 0.01000 J Total HpCDD 0.0270 0.01000 J OCDF ND 0.02000 OCDD 0.1100 0.02000

I Cone = Concentration (Totals Indudo 2,3,7.8-substitutod isomers) EMPC = Estimated Maximum Possible Concentration LRL = Lower Reporting Limit I = Interference E = PCDE Interference A = Detection Limit based on slgnal-to-nolse measurement S = Saturated signal J B Concentration detected Is below the calibration rainge 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 • = See Discussion Report No.... 02-1056372

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_000223244