NYC-WTC_000194774

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-0207-89M-DX2 Lab Sample ID 103311759 Filename U20226B_05 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 02/07/2002 I CAL Date 02/26/2002 Received 02/08/2002 CCal Filename(s) U20226A_10 & U20226B_15 Extracted 02/19/2002 Method Blank ID BLANK-1476 Analyzed 02/26/2002 21:13 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.00340 A 2,3,7,8-TCDF-13C 2.00 64 * Total TCDF ND 0.00200 2.3,7,8-TCDD-13C 2.00 68 1,2,3,7,8-PeCDF-13C 2.00 69 2,3,7,8-TCDD ND 0.00290 A 2,3,4,7,8-PeCDF-13C 2.00 75 Total TCDD ND 0.00200 1,2,3,7,8-PeCDD-13C 2.00 71 1,2,3.4,7,8-HxCDF-13C 2.00 89 1,2,3.7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 84 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6,7.8-HxCDF-13C 2.00 78 Total PeCDF ND 0.01000 1,2,3,7,8,9-HxCDF-13C 2.00 86 1,2,3.4,7,8-HxCDD-13C 2.00 69 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 78 Total PeCDD ND 0.01000 1,2,3,4,6.7,8-HpCDF-13C 2.00 70 1.2,3.4,7,8,9-HpCDF-13C 2.00 59 1,2,3,4,7,8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 64 1,2,3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 48 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 77 1,2,3,6,7,8-HxCDD ND 0.01000 1,2,3,7,8,9-HxCDD ND 0.01000 Total HxCDD 0.011 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: 0.000050 ng/m2 Total HpCDF ND 0.01000 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD ND 0.01000 Total HpCDD 0.014 0.01000 J OCDF ND 0.02000 OCDD 0.050 0.02000 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.... 02-1053890

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

CITY_21MC100_003096969

NYC-WTC_000194774