Re: Request for Disposal of Deck Drainage in North Cook Inlet Well A-12
Ms. Shannon Donnelly
ConocoPhillips Alaska Inc.
P.O. Box 66
Kenai, AK 99611
Dear Ms. Donnelly:
By letter dated May 9, 2003, ConocoPhillips Alaska Inc., (“ConocoPhillips”) requested authorization to dispose of storm water collected in the deck drain system of the Tyonek Platform in the North Cook Inlet A-12 disposal well. Each level of the platform is equipped with deck drains. The resulting deck drainage is commingled with the produced water which is stored in one of two tanks prior to overboard discharge under an existing National Pollutant Discharge Elimination System permit. ConocoPhillips is currently moving forward with facility modifications to enable real time disposal of produced water at the Tyonek Platform into Disposal Well A-12 in an effort to minimize the need for overboard discharge.
The estimated annual volume of storm water is 1,500 barrels, approximated by the volume of deck drainage processed for overboard discharge during 2002. It is recognized that the volume estimated for injection may vary depending on the amount of precipitation at the platform.
Our records indicate that NCIU Well A-12 passed a mechanical integrity test on November 8, 2001, as required in 20 AAC 25.252(d).
The Commission has determined that the storm water collected in the drain system of the Tyonek platform is suitable for underground injection and is the preferred alternative to discharge overboard from the platform. Therefore, as provided by Rule 6 – Administrative Action, the Commission approves ConocoPhillip’s request for authorization to dispose of storm water collected in the deck drain system of the Tyonek Platform in the North Cook Inlet A-12 disposal well.
DATED at Anchorage, Alaska and dated May 12, 2003.
Daniel T. Seamount, Jr.
BY ORDER OF THE COMMISSION