NYC-WTC_000207701

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 ASSOCIATES Client's Sample ID ATC-0827-1M-DX1 Lab Sample ID 103815254 Filename U21010B_13 '1 Injected By Total Amount Extracted MRO 1.00 m2 Matrix WIPE % Moisture NA Dilution NA 5 I Dry Weight Extracted NA Collected 08/27/2002 ICAL Date 08/06/2002 Received 08/28/2002 CCal Filename(s) U21010A_14 & U21010BJ6 Extracted 09/29/2002 Method Blank ID BLANK-2231 Analyzed 10/11/2002 05:30 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7.8-TCDF ND 0.00230 A 2,3,7,8-TCDF-13C 2.00 79 Total TCDF 0.0076 0.00200 J 2,3,7,8-TCDD-13C 2.00 75 1,2,3,7,8-PeCDF-13C 2.00 85 2,37,8-TCDD ND 0.00.310 A 2,3,4,7,8-PeCDF-13C 2.00 87 Total TCDD 0.0170 0.00200 1.2,3,7,8-PeCDD-13C 2.00 82 1,2,3,4.7,8-HxCDF-13C 2.00 86 1,2,3,7,8-PeCDF ND 0.01000 1.2,3,6,7,8-HxCDF-13C 2.00 98 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6,7,8-HxCDF-13C 2.00 92 Total PeCDF ND 0.01000 1,2,3,7,8,9-HxCDF-13C 2.00 93 1,2,3,4,7,8-HxCDD-13C 2.00 96 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 92 Total PeCDD ND 0.01000 1,2.3,4,6,7,8-HpCDF-13C 2.00 90 1,2,3,4,7,8,9-HpCDF-13C 2.00 84 1,2,3,4,7.8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 84 1,2,3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 63 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 79 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; 0.000083 ng/m2 Total HpCDF ND 0,01000 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD ND 0.01000 Total HpCDD ND 0.01000 OCDF ND 0.02000 OCDD 0.0830 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.... 1061946

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

CITY_21MC100_003015717

NYC-WTC_000207702