NYC-WTC_000202403

NYC 9/11 Public Portal Document

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

we Analytical Method 8290 Analysis Results Tel; 612-607-1700 Fax- 612- 607-6444

Client - ATC ASSOCIATES Client's Sample ID ATC-0826-130M-DX3 Lab Sample ID 103810164 Filename U21010B_14 Injected By BAL Total Amount Extracted 1.00 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 08/26/2002 ICALDate 08/06/2002 Received 08/28/2002 CCal Filename(s) U21010A_14 & U21010B_16 Extracted 09/29/2002 Method Blank ID BLANK-2231 Analyzed 10/11/2002 06:19 p---- Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2.3.7.8-TeDF NO 0.00250 A 2,3,7,8-TCDF-13C 2.00 75 Total TCDF ND 0.00200 2,3,7,8-TCDD-13C 2.00 48 1,2,3,7,8-PeCDF-13C 2.00 79 2,3,7.8-TCDD ND 0.00470 A 2,3,4,7,8-PeCDF-13C 2.00 81 Total TCDD 0.0040 0.00200 J 1,2,3,7,8-PeCDD-13C 2.00 76 1,2,3,7.8-PeCDF 2,3.4.7,8-PeCDF Total PeCDF ND ND ND 0,01000 0.01000 0.01000 1,2,3,4,7,8-HxCDF-13C 1,2,3,6,7,8-HxCDF-13C 2,3,4,6,7,8-HxCDF-13C 1,2,3,7,8,9-HxCDF-13C 2.00 2.00 2.00 86 101 93 91 I 1,2,3,4,7,8-HxCDD-13C 2.00 93 1,2,3.7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 90 Total PeCDD ND 0.01000 1,2,3,4,6,7,8-HpCDF-13C 2.00 93 1,2,3.4.7,8,9-HpCDF-13C 2.00 86 1,2,3,4,7,8-HxCDF ND -- 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 86 1,2,3,6,7,8-HxCDF ND -- 0.01000 OCDD-13C 4.00 69 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

1,2,3,4,7,8-HxCDD ND 0.01000 2.3,7.8-TCDD-37CI4 0.20 54 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 0.01000 Total HpCDD ND 0.01000 OCDF ND 0.02000 OCDD ND 0.02000 LRL = Lower Reporting Limit Conc = 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 defected 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..,..1061865

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

CITY_21MC100_003272460

NYC-WTC_000202403