NYC-WTC_000227084

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 I I‘ ATC-0330-M833-DX2 Client's Sample ID Lab Sample ID 103435517 Filename U20425C_10 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA

1 Dry Weight Extracted ICAL Date CCal Filename(s) NA 04/16/2002 U20425C_01 & U20425C_16 Collected Received Extracted 03/30/2002 04/02/2002 04/18/2002 Method Blank ID BLANK-1579 Analyzed 04/26/2002 01:24 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF 0.0024 — 0.0020 J 2,3,7.8-TCDF-13C 2.00 66 Total TCDF 0.0046 -- 0.0020 J 2,3,7,8-TCDD-13C 2.00 73 1,2,3,7,8-PeCDF-13C 2.00 76 2,3.7,8-TCDD ND 0.0023 A 2,3,4,7,8-PeCDF-13C- 2.00 74 Total TCDD 0.0380 0.0020 B 1,2,3,7,8-PeCDD-13C 2.00 83 1,2,3,4,7,8-HxCDF-13C 2.00 85 1i2,3.7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 83 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 81 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 86 1,2,3,4,7,8-HxCDD-13C 2.00 88 1,2,3,7,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 79 Total PeCDD 0.0120 0.0100 J 1,2,3,4,6.7.8-HpCDF-13C 2.00 85

J 1,2,3,4,7,8-HxCDF 1,2,3,6,7,8-HxCDF ND ND 0.0100 0.0100 1,2,3,4,7,8,9-HpCDF-13C 1,2,3,4,6,7.8-HpCDD-13C OCDD-13C 2.00 2.00 4.00 92 92 96 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 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: 0.00029 ng/m2 Total HpCDF ND 0.0100 (Using ITE Factors) 1.2,3,4,6,7,8-HpCDD ND 0.0100 Total HpCDD 0.0100 0.0100 J OCDF ND 0.0200 OCDD 0.0560 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 = 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 I P = Recovery outside of target range NC = Not Calculated )i Nn = Value obtained from additional analysis • = See Discussion Report No..... 02-1055822

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

CITY_21MC100_002898162

NYC-WTC_000227086