NYC-WTC_000227084

NYC 9/11 Public Portal Document Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis. MN 55414

/Z^ceAnalvticaC Tel: 612-607-1700 Fax: 612- 607-6444

7 Method 8290 Analysis Results Client - ATC Client's Sample ID ATC-0330-M833-DX1 Lab Sample ID 103435509 Filename U20425C_09 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/30/2002 ICAL Date 04/16/2002 Received 04/02/2002 CCal Filename{s) U20425C_01 & U20425C_16 Extracted 04/18/2002 Method Blank ID BLANK-1579 Analyzed 04/26/2002 00:35 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF 0.0027 — 0.00200 J 2,3,7,8-TCDF-13C 2.00 68 Total TCDF 0.0051 — 0.00200 J 2,3,7,8-TCDD-13C 2.00 75 1,2,3,7,8-PeCDF-13C 2.00 77 2,3.7,8-TCDD ND 0.00210 A 2,3,4,7,8-PeCDF-13C 2.00 76 Total TCDD 0.0260 0.00200 B 1,2,3,7,8-PeCDD-13C 2.00 84 1,2,3,4,7,8-HxCDF-13C 2.00 84 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 83 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6,7,8-HxCDF-13C 2.00 83 I Total PeCDF ND 0.01000 1,2,3,7,8,9-HxCDF-13C 1,2,3,4,7,8-HxCDD-13C 2.00 2.00 87 92 J 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 79 Total PeCDD 0.0100 0.01000 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 0.01000 0.01000 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 94 97 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 84 1,2,3,6,7,8-HxCDD ND 0.01000 1,2,3,7,8,9-HxCDD ND 0.01000 Total HxCDD 0.0110 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: 0.00031 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 0.0410 0.02000 J LRL = Lower Repotting 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.... 02-1055822

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

CITY_21MC100_002898161

NYC-WTC_000227085