Following the close of a 30-day public notice and review period, DEC has prepared a proposed final APDES individual permit AK0029840 - BPXA, Prudhoe Bay Seawater Treatment Plant (permit). Prior to making the final decision to issue the permit, DEC invites you to view the proposed final permit and associated documents. You can access the proposed final permit and associated documents at the DEC WDAP website at: http://www.dec.state.ak.us/water/wwdp/index.htm
Alaska DEC Contact:
Marc Bentley
Alaska Department of Environmental Conservation
Division of Water - Wastewater Discharge Authorization Program
555 Cordova Street, 3rd Floor
Anchorage, AK 99501-2617
(907) 269-6287
marc.bentley@alaska.gov
Proposed Final Permit Review:
Start Date: October 26, 2017
End Date: November 3, 2017, 5:00 pm Alaska Daylight Time
Permit No.: AK0029840
Applicant:
BPXA
900 East Benson Blvd.
P.O. Box 196612
Anchorage, AK 99519
Proposed Permit Coverage:
The Prudhoe Bay Seawater Treatment Plant is located at the terminus of the West Dock Causeway on the mainland shoreline at the western end of Stefansson Sound in the Beaufort Sea, immediately west of Prudhoe Bay. The reissued permit will authorize of strainer backwash generated by the treatment of raw seawater destined for use as waterflood and other industrial uses, through a single outfall to Stefansson Sound, located at Latitude 70.416512 North and Longitude -148.528981 West.
The permit proposes a chronic mixing zone wastewater generated by the treatment of raw seawater destined for use as waterflood and other industrial uses and includes temperature and ph. The permit also proposes an acute mixing zone for total residual chlorine (TRC). Both mixing zones are rectangular in shape in shape extending from the seafloor to the top of the unfrozen water column. Mixing zone dilution factors and sizes are described below.
| Mixing Zone | Dilution Factor | Mixing Zone Length | Mixing Zone Width |
| Chronic | 10.75 | 40 m | 104 m |
| Acute | 4.6 | 10 m | 74 m |
Determination:
DEC Proposes to reissue the above listed permit for a five year term.
Public Comments:
Comments from the general public were accepted during the Public Notice period from
August 3, 2017 through September 5, 2017 and will not be accepted during this review period.
Deadline for Written Applicant Review Comments:
The deadline for proposed final permit review comments by the applicant is November 3, 2017, 5:00 pm Alaska Daylight Time.
Administrative Record:
The APDES Proposed Final Permit, Fact Sheet and associated documents are available for public review at the DEC offices located in Anchorage, Fairbanks, and Juneau. Please contact the office of your choice to arrange for hard copies of the documents to be available for your review.
| 555 Cordova Street
Anchorage, AK 99501
907-269-6285 | 610 University Avenue
Fairbanks, AK 99709
907-451-2100 | 410 Willoughby Ave #303 Juneau, AK 99811
907-465-5300 |
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If you would like further information or to see any additional supporting technical documents, contact the permit writer at the address shown on page 1.
The documents are also accessible from the DEC website at:
http://www.dec.state.ak.us/water/wwdp/index.htm
To receive email notifications about the APDES Program, including when permits are available to review, follow the link below to join the APDES email list.
http://dec.alaska.gov/water/npdes/npdes_email_list.htm
Disability Reasonable Accommodation Notice
The State of Alaska, Department of Environmental Conservation complies with Title II of the Americans with Disabilities Act of 1990. If you are a person with a disability who may need a special accommodation in order to participate in this public process, please contact Natalie Wolfe at (907) 269-0291 or TDD Relay Service 1-800-770-8973/TTY or dial 711 within 5 days of publication of this notice to ensure that any necessary accommodations can be provided.