NYC-WTC_000196533

NYC 9/11 Public Portal Document

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

we Analytical__________ _ Method 8290 Analysis Results Tel: 612-607-1700 Fax- 612- 607-6444

Client - ATC Client's Sample ID ATC-0315-234M-DX2 Lab Sample ID 103399242 Filename U20405B_12 Injected By CVS Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/15/2002 ICAL Date 03/25/2002 Received 03/19/2002 CCal Filename(s) U20405A_16 & U20405B_16 Extracted 04/01/2002 Method Blank ID BLANK-1546 Analyzed 04/06/2002 08:19 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.0034 A 2,3,7,8-TCDF-13C 2.00 45 Total TCDF 0.0040 0.0020 J 2,3,7,8-TCDD-13C 2.00 41 1,2,3,7,8-PeCDF-13C 2.00 45 2.3,7,8-TCDD ND 0.0045 A 2,3,4,7,8-PeCDF-13C 2.00 45 Total TCDD 0.0240 0.0020 1,2,3,7,8-PeCDD-13C 2.00 45 1,2,3,4,7,8-HxCDF-13C 2.00 49 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 56 2,3,4,7,8-PeCDF ND 0,0100 2,3,4,6,7,8-HxCDF-13C 2.00 52 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 46 1.2,3,4,7,8-HxCDD-13C 2.00 46 1,2,3,7,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 55 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 52 1,2,3,4,7,8,9-HpCDF-13C 2.00 51 1,2,3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 56 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 43 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 51 1,2,3,6,7,8-HxCDD ND 0.0100 1,2,3,7,8,9-HxCDD ND 0.0100 Total HxCDD 0.0170 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: 0.00031 ng/m2 Total HpCDF ND 0.0100 (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD 0.0160 0.0100 J Total HpCDD 0.0430 0.0100 J OCDF ND 0.0200 OCDD 0.1500 0.0200 B 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.... 02-1055252

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_000196534