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

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Client - ATC Client's Sample ID ATC-0214-234M-DX2 Lab Sample ID 103331799 Filename U20302A_08 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 02/14/2002 ICAL Date 02/26/2002 Received 02/18/2002 CCal Filename(s) U20302A_01 &U20302A_17 Extracted 02/25/2002 Method Blank ID BLANK-1486 Analyzed 03/02/2002 22:15

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 88 Total TCDF 0.014 0.0020 2,3,7,8-TCDD-13C 2.00 77 1,2,3,7,8-PeCDF-13C 2.00 97 2,3,7,8-TCDD ND 0.0020 2,3,4,7,8-PeCDF-13C 2.00 88 Total TCDD ND 0.0020 1,2,3,7,8-PeCDD-13C 2.00 86 1,2,3,4,7,8-HxCDF-13C 2.00 92 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 81 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 74 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 42 1,2,3,7,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 76 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 67 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 63 1,2,3.6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 84 * 2,3,4,6,7,8-HxCDF ND 0.0100 1 ,2,3,7,8,9-HxCDP 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 52 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: 0.00011 ng/m2 Total HpCDF ND 0.0100 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.010 0.0100 I Total HpCDD ND 0.0100 OCDF ND 0.0200 OCDD 0.110 0.0200

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.... 02-1054209

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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