NYC-WTC_000199254

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-0822-131M-DX2 Lab Sample ID 103800397 Filename U20929B_10 Injected By BAL Total Amount Extracted 1.00 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 08/22/2002 ICAL Date 08/06/2002 Received 08/24/2002 CCal Filename(s) U20929B_01 & U20929B_17 Extracted 09/17/2002 Method Blank ID BLANK-2163 Analyzed 09/30/2002 08;06 Native Cone EMPC LRL Internal ng’s Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.00200 2,3,7,8-TCDF-13C 2.00 35 F> Total TCDF 0.0021 0.00200 J 2,3,7,8-TCDD-13C 2.00 35 F’ 1,2,3,7,8-PeCDF-13C 2.00 34 F' 2,3,7,8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 33 F’ Total TCDD 0.0056 0.00200 BJ 1,2,3,7,8-PeCDD-13C 2.00 33 P 1,2,3,4,7.8-HxCDF-13C 2.00 44 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 38 F' 2,3.4,7,8-PeCDF ND 0.01000 2,3.4,6,7,8-HxCDF-13C 2.00 39 F’ Total PeCDF ND 0.01000 1,2,3,7,8.9-HXCDF-13C 2.00 36 F’ 1,2,3,4,7,8-HxCDD-13C 2.00 55 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 35 F' Total PeCDD ND 0.01000 1,2,3.4,6,7,8-HpCDF-13C 2.00 32 F' 1,2,3.4.7,8,9-HpCDF-13C 2.00 29 F' 1,2,3,4,7,8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 36 F' 1,2,3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 29 F' 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 Hx(3DF 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 37 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; 0.00059 ng/m2 Total HpCDF ND 0.01000 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.0270 0.01000 J Total HpCDD 0.0530 0.01000 J OCDF ND 0.02000 OCDD 0.3200 0.02000 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 rang a NO = Not Calculated Nn = Value obtained from additional analysis * = See Discussion Report No.... 1061758

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

CITY_21MC100_003048614

NYC-WTC_000199254