Method 8290 wipe sample results, February 2002

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

I 'ace Anaivtical__________ Method 8290 Analysis Results Tel: 612-607-1700 Fax: 612- 607-64A4

Client - ATC I' Client's Sample ID Lab Sample ID ATC-0214-M894-DX4 103331849 Filename U20306A_08 I Injected By Total Amount Extracted CVS 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 02/14/2002 I I CAL Date CCal Filename(s) 03/05/2002 U20305B_16 & U20306A_17 Received Extracted 02/18/2002 02/28/2002 Method Blank ID BLANK-1489 Analyzed 03/06/2002 20:52

I Native Isomers Cone ng/m2 EMPC ngZm2 LRL ng/m2 Internal Standards ng's Added Percent Recovery 2,3.7,8-TCDF ND 0.00200 2,3.7.8-TCDF-13C 2.00 85 I Total TCDF ND 0.00200 2,3,7,8-TCDD-13C 1,2,3.7,8-PeCDF-13C 2.00 2.00 79 95 2,3,7,8-TCDD ND 0.00200 2.3,4,7.8-PeCDF-13C 2.00 79 Total TCDD ND 0.00200 1,2,3,7,8-PeCDD-13C 2.00 86 I 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,4,7,8-HxCDF-13C 1.2,3,6.7.8-HxCDF-13C 2.00 2.00 102 91 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6.7,8-HxCDF-13C 2.00 95 Total PeCDF ND 0.01000 1,2,3,7,8.9-HxCDF-13C 2.00 96 I 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,4,7,8-HxCDD-13C 1.2,3,6,7,8-HxCDD-13C 2.00 2.00 105 83 Total PeCDD ND 0.01000 1,2,3,4,6,7.8-HpCDF-13C 2.00 99 1,2.3,4,7,8,9-HpCDF-13C 2.00 99 I 1,2,3,4,7,8-HxCDF 1,2,3,6,7.8-HxCDF ND ND 0.01000 0.01000 1,2,3,4,6,7,8-HpCDD-13C OCDD-13C 2.00 4.00 99 82 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 I Total HxCDF ND 0.01000 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 88 1,2,3,6,7,8-HxCDD ND 0.01000 I 1,2,3,7,8,9-HxCDD Total HxCDD ND ND 0.01000 0.01000

1.2,3,4,6,7,8-HpCDF ND 0.01000 Total 2.3.7,8-TCDD I 1,2,3,4,7,8,9-HpCDF Total HpCDF ND ND 0.01000 0.01000 Equivalence: 0.00024 ng/m2 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.014 0.01000 J I Total HpCDD 0.027 0.01000 J OCDF ND 0.02000 OCDD 0.100 0.02000 B I Cone = Concentration (Totals include 2,3,7,8-substituted isomers) LRL = Lower Reporting Limit I = Interference EMPC = Estimated Maximum Possible Concentration E = PCDE Interference I A = Detection Limit based on sigrial-to-noise measurement J = Concentration detected is below the calibration range 3 = Less than 10 times higher than method blank level S = Saturated signal ND = Not Detected NA = Not Applicable = = Recovery outside of target range NC = Not Calculated

I Mn = Value obtained from additional analysis * = See Discussion Report No.... 02-1054210

I REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, withmit thp writtpn ennsAnt of Pace Anaivtical Services. Inc. CONFIDENTIAL, CITY_21MC100_003432116 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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