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Proposed Air Quality Permits 7127, 7128, and 7130 - DC Water

Friday, November 17, 2017

PUBLIC NOTICE

Proposed Air Quality Permits 7127, 7128, and 7130, District of Columbia Water and Sewer Authority (DC Water), Construction and operation of three odor scrubbers for the Central Enhanced Clarification Facility 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 Nos. 7127, 7128, and 7130 to the District of Columbia Water and Sewer Authority (DC Water) to construct and operate three (3) identical radial carbon adsorber odor scrubbers (“RCAOS”), ECF-OS2, ECF-OS3 and ECF-OS1 each rated at 28,700 cfm, to control odorous emissions from the screenings and grit processing buildings and the headspace of the screenings influent and effluent channels, grit influent channel, and vortex grit units. 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 Scrubbers to be Permitted

Equipment Location

Address

Equipment Size

Equipment ID

Type

Permit

Number

Blue Plains WWTP- North of the Grit Removal Facility

5000 Overlook Ave SW

Washington, DC 20032

28,700 cfm

ECF-OS2

Radial Carbon Adsorber

7127

Blue Plains WWTP- North of the Grit Removal Facility

5000 Overlook Ave SW

Washington, DC 20032

28,700 cfm

ECF-OS3

Radial Carbon Adsorber

7128

Blue Plains WWTP- North of the Grit Removal Facility

5000 Overlook Ave SW

Washington, DC 20032

28,700 cfm

ECF-OS1

Radial Carbon Adsorber

7130

The proposed emission limits are as follows:

a.   Visible emissions shall not be emitted into the outdoor atmosphere from the equipment covered by these permits. 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 Enhanced Clarification Facility odor control systems are properly operated to achieve at least a 99 percent removal rate for hydrogen sulfide in the foul air streams from the ECF (screenings and grit processing buildings, the headspace of the screenings influent and effluent channels, grit influent channel, and vortex grit units) or a maximum outlet concentration of 0.02 ppm of hydrogen sulfide, whichever results in a higher emission rate. [20 DCMR 201]

The estimated emissions from the odor scrubbers are as follows:

 

Flow

Removal
Efficiency

Hydrogen
Sulfide (H2S)
Emissions
(per scrubber)

scfm

%

ppm

lb/hr

tpy

ECF
Odor    
Scrubbers
(3)

Avg.

Uncontrolled

28,700

99

2

 

1.34

Controlled

0.020

 

0.013

Peak

Uncontrolled

28,700

99

5

0.76

 

Controlled

0.050

0.008

 

The applications to construct and operate the odor scrubbers and the draft set of permits 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.