NYC-WTC_000228425

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y'^.F^eAnalytic^ Minneapolis, MN 55414

Tel: 612-607-1700 Fax- 612- 607-6444 Method 8290 Analysis Results Client • ATC Client's Sample ID ATC-0308-M833-DX2 Lab Sample IO 103384798 Filename U20326B_14 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/08/2002 ICAL Date 03/25/2002 Received 03/12/2002 CCal Filename(s) U20326B_02 & U20326B_17 Extracted 03/21/2002 Method Blank ID BLANK-1528 Analyzed 03/27/2002 02;40 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND — 0.0020 A 2,3,7,8-TCDF-13C 2.00 75 Total TCDF 0.014 ---- 0.0020 2.3,7,8-TCDD-13C 2.00 71 1,2.3.7.8-PeCDF-13C 2.00 74 2,3,7,8-TCDD ND 0.0034 A 2,3,4,7.8-PeCDF-13C 2.00 72 Total TCDD 0.017 0.0020 1,2,3,7,8-PeCDD-13C 2.00 71 1,2,3.4,7,8-HxCDF-13C 2.00 111 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 85 2,3,4.7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 86 Total PeCDF ND 0.0100 1.2,3,7,8,9-HxCDF.13C 2.00 86 1,2,3,4,7,8-HxCDD-13C 2.00 117 1,2,3,7.8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 77 Total PeCDD ND 0.0100 1,2,3,4,6,7.8-HpCDF-13C 2.00 86 1,2,3.4,7,8,9-HpCDF-13C 2.00 72 1,2,3.4.7.8-HxCDF ND 0.0100 1.2.3,4,6,7,8-HpCDD-13C 2.00 79 1.2,3,6,7,8'HxCDF ND 0.0100 OCDD-13C 4.00 69 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 80 1.2,3.6,7.8-HxCDD ND 0.0100 1,2,3,7,8,9-HxCDD NO 0.0100 Total HxCDD 0.012 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 0.017 0.0100 J Total HpCDD 0.017 0.0100 J OCDF ND 0.0200 OCDD 0.120 0.0200 LRL = Lower Reporting Limit Cone = Concentration (Totals inctudo 2,3,7,8-8ubstituted isomers) I = Interference EMPC s Estimated Maximum Possible Concentration E = PCDE Interference A = Detection Limit based on signal-to-noiso measurement S = Saturated signal J = Concentration detected is below the calibration range ND = Not Detected 8 = 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.... 02-1055017

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

CITY_21MC100_002900523

NYC-WTC_000228444