PCDD/PCDF lab report, PS234M, April 2002

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

weAnaIvtical_________ Method 8290 Analysis Results Tel: 612-607-1700 Fax: 612- 607-6444

Client - ATC Client's Sample ID ATC-0319-234M-DX1 Lab Sample ID 103418802 Filename F20415A_12 Injected By MASB Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/19/2002 ICAL Date 04/12/2002 Received 03/26/2002 CCal Filename(s) F20415A_02 & F20415A_15 Extracted 04/03/2002 Method Blank ID BLANK-1552 Analyzed 04/15/2002 20;30 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery '1 2,3.7,8-TCDF 0.0021 0.00200 J 2,3,7,8-TCDF-13C 2.00 69 Total TCDF 0.0980 0.00200 2,3,7,8-TCDD-13C 2.00 64 1,2,3,7,8-PeCDF-13C 2.00 70 2,3,7,8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 64 2.00 J Total TCDD

1,2,3,7,8-PeCDF 0.1400

ND 0.00200

0.01000 1,2,3,7,8-PeCDD-13C 1,2,3,4,7,B-HxCDF-13C 1,2,3,6,7,8-HxCDF-13C 2.00 2.00 67 94 62 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6,7,8-HxCDF-13C 2.00 77 Total PeCDF 0.0240 0.01000 J 1,2,3,7,8,9-HxCDF-13C 2.00 71 1,2,3,4,7,8-HxCDD-13C 2.00 92 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 72 Total PeCDD 0.0520 0.01000 1,2,3,4,6,7.8-HpCDF-13C 2.00 67 1,2,3,4,7,8,9-HpCDF-13C 2.00 57 1,2,3,4,7,8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 65 1,2.3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 48 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 HxCDF 0.0140 0.01000 J 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 66 "1 1,2,3,6,7,8-HxCDD ND 0.01000 i 1,2,3,7,8.9-HxCDD ND 0.01000 Total HxCDD 0.0410 0.01000 J

1,2,3,4,6,7,8-HpCDF 0.0130 0.01000 J Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF ND 0.01000 Equivalence: 0.0011 ng/m2 Total HpCDF 0.0130 0.01000 J (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.0360 0.01000 J Total HpCDD 0.0620 0.01000 J

OCDF 0.0200 0.02000 J OCDD 0.3900 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 range NC = Not Calculated Nn = Value obtained from additional analysis * = See Discussion Report No.... 02-1055552

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

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