NYC-WTC_000228425

NYC 9/11 Public Portal Document 1700 Elm Street - Suite 200 Minneapolis, MN 55414

• /^Pace Analytical' Tel: 612-607-1700 Fax- 612- 607-6444 Method 8290 Analysis Results J Client - ATC Client's Sample ID ATC-0308-M833-DX1 Lab Sample ID 103384780 Filename U20326B_13 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/08/2002 ICAL Date 03/25/2002 Received 03/12/2002 CCa! Filename(s) U20326B_02 & U20326B_17 Extracted 03/21/2002 Method Blank ID BLANK-1528 Analyzed 03/27/2002 01:52 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2.3.7.8-TCDF ND 0.0029 A 2,3,7,8-TCDF-13C 2.00 66 Total TCDF ND 0.0020 2,3,7,8-TCDD-13C 2.00 68 1.2,3,7,8-PeCDF-13C 2.00 66 2.3,7,8-TCDD ND 0.0033 A 2,3.4.7.8-PeCDF-13C 2.00 64 Total TCDD 0.0061 0.0020 J 1,2,3,7,8-PeCDD-13C 2.00 64 1,2,3,4,7,8-HxCDF-13C 2.00 107 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 86 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 87 Total PaCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 81 1,2,3,4,7,8-HxCDD-13C 2.00 116 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 88 1,2,3,4,7,8,9-HpCDF-13C 2.00 77 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 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-37CW 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 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; 0.00017 ng/m2 Total HpCDF NO 0.0100 (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD 0.0120 0.0100 J Total HpCDD 0.0120 0.0100 J OCDF ND 0.0200 OCDD 0.0470 0.0200 J 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 = 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 • = See Discussion Report No..... 02-1055017

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

CITY_21MC100_002900522

NYC-WTC_000228443