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North Carolina Department of Environment and Natural Resources
Division of Air Quality
Beverly Eaves Purdue B. Keith Overcash, RE Dee Freeman
Governor Director Secretary
March 02, 2009
Mr. William S. Bond
Environmental, Health& Safety Manager
3M Pittsboro
4191 Highway 87 South
Moncure, NC 27559
Subject: Second Semesters 2008 Continuous Opacity Monitoring Systems (COMS) Report for ID
No. CD -40 CFR Part 60, Subparts A and UUU.
Facility ID No.1900104
Dear Mr. Bond:
The Division of Air Quality(DAQ) has reviewed your second semester 2008 (July 1, through
December 31, 2008)opacity emission reports from the C&S Dryer, CL 1 and CL 2Preheaters.The reports
were reviewed for compliance with the monitoring and reporting requirements of the emission control
standard(opacity limit) set forth in the current Air Quality Permit# 09006R66. The reports were also
reviewed for compliance with good operation and maintenance practices set forth in 40 CFR Part 60,
Subparts A and UUU and implemented in the North Carolina Continuous Monitoring Enforcement Plan
(NCCEP) and in accordance with EPA's High Priority Violations (HPVs) guidance.
Based on the review, the opacity excess emissions and monitor downtime for the period were
reported and confirmed as follows:
UNIT SECOND SEMESTER 2008
C&S Dryer Excess Emissions 0.0%
Monitor Downtime 1.78%
CL1Preheater Excess Emissions 0.0%
Monitor Downtime 0.93%
CL2 Pre heater Excess Emissions 0.0%
Monitor Downtime 1.37%
When the reports are reviewed with respect to the emission control standard(opacity limit) no six-
minutes opacity exceedances were noted from the C&S Dryer, CL1Preheater, and CL2 Pre heater. Also,
when the reports are reviewed for compliance with good operation and maintenance practices, excess
emissions and monitor downtime were reported and confirmed(as shown above)to be below the NCCEP
criteria and the HPVs guidance. Therefore no further action is required.
Technical Services Section One
Mail Service Center, Raleigh,North Carolina 27699-1641
2728 Capital Blvd.,Raleigh,NC 27604 North Cat Ohria
Phone [phone]/FAX [phone]/Internet www.ncair.org NaturallyAn Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

Mr. William S. Bond
Page Two
March 02, 2009
If you have any questions regarding this review, please call me at [phone].
Sincerely,
AA 6JL
Dennis U. Igboko
Environmental Engineer
CC: Mike Pjetraj
Patrick Butler—RRO
IMPAQ—Documents - 1900104
Tina Mumm—3M Environmental Operations, Bldg 42-2E-27, Box 33331, St Paul,MN 55133
Central File-Chatham County