NYC-WTC_000223173

NYC 9/11 Public Portal Document

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

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

Client - ATC Client’s Sample ID ATC-0416-234M-DX2 Lab Sample ID 103481321 Filename F20506B_06 Injected By MRO Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 04/16/2002 ICAL Date 05/04/2002 Received 04/23/2002 CCal Filename(s) F20506A_13 & F20506B_14 Extracted 04/30/2002 Method Blank ID BLANK-1606 Analyzed 05/07/2002 00:00 Native Cone EMPC LRL Internal ng’s Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.0024 A 2,3,7,8-TCDF-13C 2.00 83 Total TCDF 0.0097 0.0020 J 2,3,7,8-TCDD-13C 2.00 77 1,2,3,7,8-PeCDF-13C 2.00 68 2,3,7,8-TCDD ND 0.0038 A 2,3,4,7,8-PeCDF-13C 2.00 68 Total TCDD 0.0077 0.0020 J 1,2,3,7,8-PeCDD-13C 2.00 64 1,2,3,4,7,8-HxCDF-13C 2.00 112 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 107 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 105 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 98 1,2,3,4,7,8-HxCDD-13C 2.00 107 1.2,3.7,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 103 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 100 1,2,3.4,7.8,9-HpCDF-13C 2.00 97 1,2,3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 90 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C . 4.00 110 * 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 83 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: 0.000023 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 0.0230 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 c Saturated signal J = Concentration detected Is below the calibration range ND c 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.... 02-1056601

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

CITY_21MC100_002889414

NYC-WTC_000223173