AQ_F_1900104_20090814_CEM_RptRvwLtr

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Air Quality
Beverly Eaves Purdue B. Keith Overcash, RE Dee Freeman
Governor Director Secretary
August 14, 2009
Mr. Eric B. Funk
Environmental, Health& Safety Manager
3M Pittsboro
4191 Highway 87 South
Moncure, NC 27559
Subject: First Semesters 2009 Continuous Opacity Monitoring Systems(COMS)Report for ID No.
CD -40 CFR Part 60, Subparts A and UUU.
Facility ID No.1900104
Dear Mr. Funk:
The Division of Air Quality (DAQ) has reviewed your first semester 2009(January 1, through June
30, 2009)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# 09006T01. 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 FIRST SEMESTER 2009
C&S Dryer Excess Emissions 0.0%
Monitor Downtime 0.83%
CLIPreheater Excess Emissions 0.0%
Monitor Downtime 1.24%
CL2 Pre heater Excess Emissions 0.0%
Monitor Downtime 1.56%
When the reports are reviewed with respect to the emission control standard(opacity limit)one
opacity excursion was reported due to fogged mirror on C&S Dryer opacity monitor. Your explanation of
the incident is accepted. No further action is required. With respect to the opacity monitor on CLIPreheater
and CL2 Pre heater, no six-minute opacity exceedances were noted.
Technical Services Section
1641 Mail Service Center,Raleigh,North Carolina 27699-1641 One
2728 Capital Blvd.,Raleigh,NC 27604 NorthCarolina
Phone: [phone] FAX [phone] I Internet: www.ncair.org Naturally
An Equal Opportunity/Affirmative Action Employer—50%Recycledl10%Post Consumer Paper

Mr. Eric B. Funk
Page Two
August 14,2009
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.
If you have any questions regarding this review,please call me at [phone].
Sincerely, / q,
Dennis U. Igboko
Environmental Engineer
CC: jMike 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 _