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Proposed Air Quality Permit 7129 - DC Water

Friday, November 17, 2017

PUBLIC NOTICE

Proposed Air Quality Permit 7129, District of Columbia Water and Sewer Authority (DC Water), Construction and operation of an odor scrubber for the Tunnel Dewatering Pump Station at Blue Plains Wastewater Treatment Plant, 5000 Overlook Ave SW

Notice is hereby given that, pursuant to 40 C.F.R. Part 51.161, D.C. Official Code §2-505, and 20 DCMR §210, the Air Quality Division (AQD) of the Department of Energy and Environment (DOEE), located at 1200 First Street NE, Washington, DC, intends to issue permit No. 7129 to the District of Columbia Water and Sewer Authority (DC Water) to construct and operate one (1) Daniel Company vertical carbon adsorber odor scrubber (TDPS-OS4), rated at 3,500 cfm, to control odorous emissions from the tunnel dewatering pump station (TCPS) vent shaft during non-event periods. The emission control equipment is located at 5000 Overlook Avenue SW, Washington DC 20032. The contact person for the facility is Meena Gowda, Principal Counsel, at (202) 787-2628.

Odor Scrubber to be Permitted

Equipment Location

Address

Equipment Size

Equipment ID

Type

Permit

Number

Blue Plains WWTP, South of TDPS

5000 Overlook Ave SW

Washington, DC 20032

3,500 cfm

TDPS-OS4

Vertical Carbon Adsorber

7129

The proposed emission limits are as follows:

a.   Visible emissions shall not be emitted into the outdoor atmosphere from the equipment covered by this permit. Where the presence of uncombined water is the only reason for failure of an emission to meet the requirements of this condition, this condition shall not be applicable. [20 DCMR 201]

b.   An emission into the atmosphere of odorous or other air pollutants from any source in any quantity and of any characteristic, and duration which is, or is likely to be injurious to the public health or welfare, or which interferes with the reasonable enjoyment of life or property is prohibited. [20 DCMR 903.1]

c.   The Permittee shall ensure that the Tunnel Dewatering Pump Station odor control system is properly operated to achieve at least a 99 percent removal rate for hydrogen sulfide (H2S) in the foul air streams from the TDPS vent shaft and pump manifold or a maximum outlet concentration of 0.02 ppm of hydrogen sulfide, whichever results in a higher outlet emission rate. [20 DCMR 201 and 20 DCMR 803]

The estimated emissions from the odor scrubber are as follows:

 

Flow

Removal
Efficiency

Hydrogen
Sulfide (H2S)
Emissions
(per scrubber)

scfm

%

ppm

lb/hr

tpy

TDPS
Odor
Scrubber
(1)

 

Avg.

Uncontrolled

3,500

99

2

 

0.163

Controlled

0.020

 

0.002

Peak

Uncontrolled

3,500

99

5

0.09

 

Controlled

0.050

0.001

 

The application to construct and operate the odor scrubber and the draft permit and supporting documents are available for public inspection at AQD and copies may be made available between the hours of 8:15 A.M. and 4:45 P.M. Monday through Friday.  Interested parties wishing to view these documents should provide their names, addresses, telephone numbers and affiliation, if any, to Stephen S. Ours at (202) 535-1747.

Interested persons may submit written comments or may request a hearing on this subject within 30 days of publication of this notice.  The written comments must also include the person’s name, telephone number, affiliation, if any, mailing address and a statement outlining the air quality issues in dispute and any facts underscoring those air quality issues.  All relevant comments will be considered in issuing the final permit.


Comments on the proposed permit and any request for a public hearing should be addressed to:


Stephen S. Ours
Chief, Permitting Branch - Air Quality Division

Department of Energy and Environment
1200 First Street NE, 5th Floor
Washington, DC 20002

[email protected]


No comments or hearing requests submitted after December 18, 2017 will be accepted.