Environmental Quality Control (EQC)
Seaco, Inc. produces asphalt emulsions at its facility located at 2700 William H. Tuller Drive in Columbia,
SC. Seaco's current air quality permit was issued on April 9, 2008, and expires on March 31, 2018. Seaco's
air quality permit authorizes operation of a boiler that uses natural gas and No. 2 fuel oil. An additional
boiler that only uses natural gas and a fuel oil storage tank are listed on the permit as sources of emissions
that are exempt from air permits. DHEC regularly inspects this facility to ensure that it is abiding by its air quality
permit every other year, and has found no violations at this facility.
Seaco may qualify for coverage under DHEC's Registration Permit for Fuel Combustion Operations. DHEC
has requested additional information about the facility's operations and will conduct an assessment of the
facility before granting coverage.
On May 24, 2012, DHEC received a letter requesting that all air permits related to Colprovia and Seaco, Inc. be
transferred to Associated Asphalt Columbia. The Department modified air permit 1900-0220 to incorporate the transfer of ownership from Seaco, Inc. to Associated Asphalt
Columbia, LLC t/a Seaco Emulsions. This administrative change does not allow an increase in emissions and no other changes have
been made to the permit. The permit will remain valid through March 31, 2018.
DHEC received a letter from Associated Asphalt requesting to install a voluntary odor control device at the Seaco Emulsions site.
Colprovia Asphalts, Division of Seaco, Inc.
Colprovia Asphalts, a division of Seaco, Inc. is a cold-mix asphalt plant. The most recent air quality
permit issued to Colprovia became effective on January 1, 2007, and expired on December 31, 2011. A request
to renew the operating permit was received on January 12, 2012, allowing the facility to continue to operate as
permitted. Prior to each issuance and renewal of a Conditional Major Air Quality State Operating Permit, DHEC
is required to notify the public and hold a 30-day public comment period.
On August 22, 2001, DHEC published a public
notice in The State newspaper in Columbia, SC, indicating that a Conditional Major air quality permit had
been drafted for the cold-mix asphalt plant at Colprovia Asphalts. DHEC accepted comments on the draft permit
through September 21, 2001. No comments were received.
On September 12, 2006, DHEC published a public notice in
The State newspaper in Columbia, SC, indicating that a renewal of the Conditional Major permit had been
drafted. DHEC accepted comments on the permit renewal through October 11, 2006. No comments were received.
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The operating permit authorizes Colprovia Asphalts to operate a cold-mix asphalt plant. The cold-mix
asphalt plant is equipped with a pollution control device called a scrubber to control particle emissions.
The asphalt plant has the capacity to produce 130 tons per hour of cold-mix asphalt. To meet the health-protective
Federal and State regulations, emissions from the asphalt plant are limited to 20% opacity, less than 100
tons per year of carbon monoxide, and 14.0 pounds per hour of particle emissions. Particle emissions that
are less than 10 microns in diameter (a human hair is 50-70 microns in diameter) are also limited to less
than 100 tons per year. The Conditional Major Air Quality Operating Permit requires Colprovia to operate the scrubber
at all times during asphalt production, conduct daily visual inspections of the facility, maintain records
of the scrubber's operation, and conduct biennial stack tests.
Stack Test Reports
Colprovia Asphalts is required to test its processes for air pollutant emissions. The test results are
used to determine if the facility is in compliance with the emission limitations in its air permit. A facility
may use its own stack testing group or hire a third party contractor to conduct the stack tests. In preparation
for testing, facilities must prepare a Stack Test Protocol. It is the responsibility of DHEC to approve or
disapprove the Stack Test Protocol. Like all facilities, Colprovia is required to notify DHEC at least 15
days before the test to give us the opportunity to observe the test. Once the stack tests are conducted, the
facility must send a report of the results to DHEC for review. If the results are validated, DHEC will issue
a letter approving the stack test.
Colprovia is required to conduct stack tests every two years. Reports of the stack tests conducted at Colprovia
since 1990 are listed below:
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DHEC regularly inspects this facility to ensure it is abiding by its Conditional Major Air Quality
permit. During an inspection in 2002, DHEC found that Colprovia had installed a fuel oil storage tank
and switched its primary fuel usage to natural gas without receiving a required air quality construction
permit. Although the changes did not have any impact on the environment or public health, the Department
issued a Notice of Violation for failure to receive the necessary approvals prior to making the changes.
Colprovia subsequently submitted the necessary documentation to update the air quality permit.
The Department is currently processing a Conditional Major Operating renewal permit application request. The facility is required to be operated in accordance with the most recent Conditional Major Operating Permit until the Department has taken final action on the renewal request.
On May 24, 2012, DHEC received a letter requesting that all air permits related to Colprovia and Seaco, Inc.
be transferred to Associated Asphalt Columbia. The Department transferred air permit 9900-0025 from Colprovia
Asphalts, Division of Seaco, Inc. to Associated Asphalt Columbia, LLC t/a Colprovia Asphalts. This administrative
change does not allow an increase in emissions and no other changes have been made to the permit. The facility is
required to be operated in accordance with the most recent Conditional Major Operating Permit until the Department
has taken final action on the renewal request.
For additional information related to Seaco's air permits, please
contact Fatina Ann Washburn Clark at (803) 898-4072.