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Notice of Public Comment Period - Draft Air Quality Permits 7067 and 7068

Friday, January 11, 2019

PUBLIC NOTICE

Notice of Public Comment Period – Draft Air Quality Permits 7067 and 7068, District of Columbia Water and Sewer Authority (DC Water)

Notice is hereby given that, pursuant to 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 permits (Nos. 7067 and 7068) to the District of Columbia Water and Sewer Authority (DC Water) to construct and operate the Grit and Screening Loading Stations 1 and 2 Scrubbers (GSLS-1 and GSLS-2) listed below. This 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

Permit No.

Equipment Location

Address

Equipment Size

Description

7067

Blue Plains WWTP - Grit and Screening Loading Station 1 – West Headworks Building

5000 Overlook Ave SW

Washington DC 20032

45,000 cfm

GSLS-1 - Packed Bed Tower Scrubber

7068

Blue Plains WWTP - Grit and Screening Loading Station 2 – East Headworks Building

5000 Overlook Ave SW

Washington DC 20032

71,400 cfm

GSLS-2 - Packed Bed Tower Scrubber

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 each grit screening and loading station odor scrubber is properly constructed and operated to achieve removal of a minimum of 90 percent of hydrogen sulfide from the air stream or a maximum outlet concentration of 1.5 ppm hydrogen sulfide, whichever results in a higher outlet emission rate. [20 DCMR 201]

The estimated emissions from the odor scrubbers are as follows:

Note that the uncontrolled emissions shown below represent existing potential emissions from the facility. The controlled emissions show potential emissions after proper installation and operation of the odor scrubbers.

 

     

 

 

Hydrogen Sulfide (H2S)

     

 

Removal

 

     

Flow

Efficiency

 

Emissions1

 

     

acfm

%

ppm

lb/hr

tpy

GSLS-1

 

Uncontrolled

45,000

0

15

3.58

16

 

 

Controlled

90

1.5

0.358

1.57

GSLS-2

 

Uncontrolled

71,400

0

15

5.69

25

 

 

Controlled

90

1.5

0.569

2.49

Project
Total

Controlled

 

 

 

 

4.06

1 Total emissions are based on operation of all four fans simultaneously.

The applications to construct and operate the odor scrubbers and the draft renewal 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 making any final decision on the permit applications.

 

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 February 11, 2019 will be accepted.