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On September 20, 2019, LDEQ issued three potpourris for various air regulations. The first, 1909Pot2, regards substantive changes to Proposed Rule AQ383 Regulatory Permit for Boilers and Process Heaters (LAC 33:III.323). The second, 1901Pot3, addresses substantive changes to Proposed Rule AQ384 Regulatory Permit for Cooling Towers (LAC 33:III.325). The third, 1901Pot4, is regarding the 2010 Sulfur Dioxide National Ambient Air Quality Standards State Implementation Plan (SIP) Revision. On May 20, 2019, proposed rules AQ383 and AQ384 were originally issued by LDEQ.

A summary of the three potpourris are below.

1909Pot2: Substantive Changes to Proposed Rule AQ383 Regulatory Permit for Boilers and Process Heaters (LAC 33:III.323)

Under this potpourri, records of visible emissions need to be kept on site for at least five years and shall be made availble for inspection by the agency. Additionally, visible emission inspections for boilers or process heater's stack can be conducted using a video camera provided the camera is capable of capturing images of the stack at a reasonable distance above the stack, and is set at an angle suitable for visible emissions observation.

Lastly, Subection E.4 - G.2 will not apply to boilers or process heaters that must conduct performance tests in conformity with applicable federal requirements, as described in LAC 33:III.323.D. If a performance test is required for only NOX or CO, but not both, a performance test for the other pollutant shall be conducted during the performance test required by 40 CFR 60.8 and/or 40 CFR 63.7.

A public hearing on the substantive changes is scheduled:

October 30, 2019
1:30 p.m.
Galvez Building
Oliver Pollock Conference Room, 602 N.

Public comments on AQ383 must be received no later than October 30, 2019 at 4:30pm. Email comments to Deidra Johnson at DEQ.Reg.Dev.Comments@la.gov, Attorney Supervisor.

1909Pot3: Substantive Changes to Proposed Rule AQ384 Regulatory Permit for Cooling Towers (LAC 33:III.325)

Under this potpourri, LDEQ made changes to address the coments received during the public comment period of proposed rule AQ 384. Changes made to 325.E are in regard to Total Dissolved Solids (TDS). The permittee shall determine and record the concentration of TDS in the cooling water at least once per quarter using Standard Method 2540C, or EPA Method 160.1. Alternate methods may be used with the prior approval of the department.

The permittee shall average all recorded TDS concentrations and utilize the drift rate provided by the manufacturer and the design recirculation rate of the cooling water pump(s) to determine compliance with the particulate matter emission limitations for the cooling tower.

A public hearing on the substantive is scheduled:

October 30, 2019
1:30 p.m.
Galvez Building
Oliver Pollock Conference Room, 602 N.

Public comments on AQ383 must be received no later than October 30, 2019 at 4:30pm. Email comments to Deidra Johnson at DEQ.Reg.Dev.Comments@la.gov, Attorney Supervisor.

1909Pot4: 2010 Sulfur Dioxide National Ambient Air Quality Standards State Implementation Plan (SIP) Revision

On June 2, 2010, U.S. Environmental Protection Agency (EPA) revised the primary Sulfur Dioxide (SO2) National Ambient Air Quality Standards (NAAQS) by establishing a new one-hour standard at a level of 75 parts per billion (ppb). From these changes, EPA designated part of Evangeline Parish as nonattainment for the new NAAQS on April 9, 2018, per the Data Requirements Rule (DRR). The designated nonattainment area is the rectangular portion of Evangeline Parish defined by vertices with UTM coordinates (NAD83 15R):

  • 570250m E, 3400300m N
  • 570250m E, 3403300m N
  • 572400m E, 3403300m N
  • 572400m E, 3400300m N

Public comments on must be received no later than October 25, 2019 at 4:30pm. Email comments to Vivian H. Aucoin at vivian.aucoin@la.gov, Office of Environmental Assessment.

If you have any questions regarding the potpourris, please contact Trinity's Baton Rouge office at (225) 346-4003.