PCDD/PCDF lab report, PS234M, April 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-0326-234M-DX1 Lab Sample ID 103435392 Filename F20424A_11 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 03/26/2002 ICAL Date 04/12/2002 Received 04/02/2002 CCal Filename(s) F20424A_02 & F20424A_14 Extracted 04/15/2002 Method Blank ID BLANK-1572 Analyzed 04/24/2002 15:37 Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF 0.0050 0.0020 J 2,3,7,8-TCDF-13C 2.00 69 Total TCDF 0.1400 0.0020 2,3.7,8-TCDD-13C 2.00 70 1,2,3,7,8-PeCDF-13C 2.00 59 2,3,7,8-TCDD ND 0.0020 2,3,4.7,8-PeCDF-13C 2.00 62 Total TCDD 0.1800 0.0020 1,2,3,7,8-PeCDD-13C 2.00 65 1,2,3,4,7,8-HxCDF-13C 2.00 107 1,2,3,7,8-PeCDF ND 0.0100 1,2,3,6,7,8-HxCDF-13C 2.00 49 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,B-HxCDF-13C 2.00 89 Total PeCDF 0.0360 0.0100 J 1,2,3,7,8,9-HxCDF-13C 2.00 79 1,2,3,4,7,8-HxCDD-13C 2.00 112 1,2,3,7,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 80 Total PeCDD 0.0370 0.0100 J 1,2,3,4,6.7,8-HpCDF-13C 2.00 79 1,2,3,4,7,8,9-HpCDF-13C 2.00 62 1,2,3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 73 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 49 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 0.0170 0.0100 J 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 74 1,2,3,6,7,8-HxCDD ND 0.0100 1,2,3,7.8,9-HxCDD ND 0.0100 Total HxCDD 0.0210 0.0100 J

1,2,3,4,6,7.8-HpCDF 0.0260 0.0100 J Total 2,3.7.8-TCDD 1,2,3,4,7,8,9-HpCDF ND 0.0100 Equivalence: 0.0012 ng/m2 Total HpCDF 0.0260 0.0100 J (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.0240 0.0100 J Total HpCDD 0.0370 0.0100 J

OCDF 0.0290 0.0200 J OCDD 0.1300 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.... 02-1055818

REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. J CONFIDENTIAL, CITY_21MC100_003444368 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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