PCDD/PCDF wipe sample results, PS 234M, Mar 2002

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Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414

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Client - ATC Client's Sample ID ATC-0301-234M-DX-2 Lab Sample ID 103363842 Filename U20325A_12 Injected By MASB Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/01/2002 ICAL Date 03/25/2002 Received 03/05/2002 CCal Filename(s) -020325A_07 & U20325A_20 Extracted 03/14/20-02 Method Blank ID BLANK-1516 Analyzed 03/25/2002 18:10 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 2.3,7,8-TCDF-13C 2.00 57 Total TCDF 0.0023 0.0020 J 2,3,7,8-TCDD-13C 2.00 66 1,2,3,7,8-PeCDF-13C 2.00 40 2,3,7,8-TCDD ND 0.0020 2,3,4,7,8-PeCDF-13C 2.00 37 P Total TCDD 0.0460 0.0020 1,2,3,7,8-PeCDD-13C 2.00 49 1,2,3,4,7,8-HxCDF-13C 2.00 126 1.2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 57 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 97 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 71 1,2,3,4,7,8-HxCDD-13C 2.00 134 1.2,3,7,8-PeCDD 0.011 0.0100 I 1,2,3,6,7,8-HxCDD-13C 2.00 92 Total PeCDD 0.0730 0.0100 1,2,3.4,6,7,8-HpCDF-13C 2.00 81 1,2,3,4,7,8,9-HpCDF-13C 2.00 93 * 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 4.00 101 * 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 0.0360 0.0100 J 1,2,3,7,8,9-HxCDD-13C 2.00 NA

1,2,3,4,7,8-HxCDD 0.0270 0.0100 J 2,3,7,8-TCDD-37CI4 0.20 68 1,2,3,6,7.8-HxCDD 0.0150 0.0100 J 1,2,3,7,8,9-HxCDD ND 0.0100 Total HxCDD 0.3300 0.0100

1,2,3,4,6,7,8-HpCDF 0.0280 0.0100 J Total 2.3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF ND 0.0100 Equivalence; 0.0067 ng/m2 Total HpCDF 0.0740 0.0100 J (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.1600 0.0100 B Total HpCDD 0.4100 — 0.0100 B------

OCDF 0.0480 0.0200 J OCDD 0.5800 0.0200 B

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 range NC = Not Calculated Nn = Value obtained from additional analysis ’ = See Discussion Report No.... 02-1054706

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

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