NYC-WTC_000228425

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Tel: 612-607-1700 Fax 612- 607-6444 Method 8290 Analysis Results Client - ATC Client's Sample ID ATC-0308-M833-DX3 Lab Sample ID 103384806 Filename U20327A_03 Injected By BAL Total Amount Extracted 1 ni2 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_17 & U20327A_15 Extracted 03/21/2002 Method Blank ID BLANK-1528 Analyzed 03/27/2002 07:30 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7.8-TCDF ND — 0.0039 A 2,3,7,8-TCDF-13C 2.00 70 Total TCDF 0.0070 ---- 0.0020 J 2,3,7,8-TCDD-13C 2.00 70 1,2,3,7,8-PeCDF-13C 2.00 71 2.3,7,8-TCDD ND 0.0077 A 2,3,4,7,8-PeCDF-13C 2.00 73 Total TCDD ND 0.0020 1,2,3,7,8-PeCDD-13C 2.00 74 1,2,3,4,7,8-HxCDF-13C 2.00 102 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 91 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6.7,8-HxCDF-13C 2.00 90 Total PeCDF ND 0.0100 1,2,3.7,8,9-HxCDF-13C 2.00 85 1,2,3,4,7,8-HxCDD-13C 2.00 110 1,2,37,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 93 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 96 1,2,3,4,7,8,9-HpCDF-13C 2.00 82 1.2,3,4.7,8-HxCDF ND 0.0100 1.2,3,4,6,7,8-HpCDD-13C 2.00 86 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 74 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 76 1,2,3,6,7,8-HxCDD ND 0.0100 1,2,3.7,8,9-HxCDD ND 0.0100 Total HxCDD ND 0.0100 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: 0.00024 ng/m2 Total HpCDF ND 0.0100 (Using ITE Factors) 1,2,3.4,6,7,8-HpCDD 0.023 0.0100 I Total HpCDD ND 0.0100 OCDF ND 0.0200 OCDD 0.2400 0.0200 LRL = Lower Reporting Limit Cone - Concentration (Totals include 2,3,7,8-substituted isomers) I = Interference EMPC s Estimated Maximum Possible Concentration E = PCDE Interference A = Detection Limit based on signal-to-noise measurement S = Saturated signal J = Concentration detected is below ths calibration range ND = Not Detected B s Less than 10 times higher than method blank level NA = Not Applicable P s 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_002900524

NYC-WTC_000228445