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Fish and Aquatic Life

Learn more about fish issues in the Delaware River

Delaware City Refinery killing massive numbers of fish

Reposted from our friends at Delaware Audubon Society:

Delaware City Refinery Killing Massive Numbers of Fish

Action Needed: Force Refinery to Adopt Better Technology

The photo [above] shows some of the piles of dead fish scraped from the Delaware City Refinery's cooling water intake and wastefully dumped in the nearby field.

Public hearing: Delaware City Refinery permit application for an ether cooling tower, Dec 19, 2012
The Department of Natural Resources and Environmental Control, Division of Air Quality, conducted a public hearing at our request on an air permit application submitted by Delaware City Refining Company to restart the Ether Plant Cooling Tower which has been out of service since 2002.
Cooling water permit for Delaware City Refinery is long overdue

The cooling water intake structure of the Delaware City Refinery is operating on a permit that expired in 2002.  Not only has the State of Delaware allowed this to occur, it has offered additional extensions to the refinery for its 2011 restart, and provides a multi-year compliance timeline for the installation of best available technology with in the draft NPDES permit (2011). 

Delaware City Refinery's Fish Impacts
The Delaware City Refinery extracts on average over 450 million gallons of water from the Delaware River daily, for the purpose of cooling plant equipment and units as it processes nearly 200,000 barrels of petroleum per day. In the process, it impinges millions of fish on the intake screens and entrains millions more small fish, eggs and larvae. The estimated death toll of fish impingement and entrainment at the refinery is 100%. The refinery has been described as one of the largest predators on the Delaware River, out-fishing commercial and recreational fisheries combined for many species.
Sierra Club asks DNREC to reassess fish consumption advisory for Dragon Run Creek
The Delaware Chapter of the Sierra Club requests that the State of Delaware reassess the fish consumption advisory for Dragon Run. According to the 2012 Delaware Fishing Guide, all waters not specifically listed in the Delaware Fish Consumption Advisories table on pages 38 and 39 have a recommended consumption level of 52 8-ounce servings per year. Dragon Run is not listed in this table, and therefore the default 52 8-ounce servings per year advisory applies to fish consumed from this water body. However, the fish contamination samples reported in the U.S. Environmental Protection Agency’s National Listing of Fish Advisories indicates a higher hazard advisory is warranted
Club Forum: Fish Impacts by the Delaware City Refinery, July 9, 2012

Join us for a discussion of the topic of fish impingement at the Delaware City Refinery. The once-through cooling system infrastructure has significant impacts on the Delaware River and Bay's fish populations. This forum will be of interest to all of those who enjoy a healthy wild fish population, from environmentally-minded members and activists to sportsmen and commercial fishermen.

Fishery managment protections needed for American shad and river herrings
On May 31, 2012 the Delaware Chapter asked Governor Markell to strengthen management protections for American shad and river herrings. Delaware’s rivers and estuaries once supported abundant river herring and shad, providing opportunities for recreational fishing and an abundant food source for wildlife. Delaware recently implemented a moratorium on commercial and recreational fishing for river herring and a similar moratorium on American shad may be imminent. But more work needs to be done in federal waters to recover these depleted fish.
Mercury Warning: Fish in Delaware are Unsafe to Eat
Even small amounts of mercury, such as that in a fever thermometer, can pose a danger to human health and the environment.  A typical mercury thermometer contains one gram of elemental mercury.  This small amount, the size of a few drops, can harm the environment and human health if the thermometer breaks and the mercury is released.  For example, if the amount of mercury in a fever thermometer were deposited into a 20 acre lake on an annual basis, this one gram would be sufficient to contaminate the water to the extent that the fish would no longer be safe to eat.
Atlantic Sturgeon Receive Endangered Species Status

On February 6, 2012 the National Marine Fisheries Service issued a ruling that granted Atlantic sturgeon endangered status.  Atlantic sturgeon are known to live more than 60 years and grow to 14 feet in length. There are five distinct population segments (DPS) of Atlantic sturgeon, each of which have received Endangered Species Act protections.

Delaware City Refinery Fish Impingement and Entrainment Studies

  • Normandeau Associates 2001: Impingement and Entrainment at the Cooling Water Intake Structure of the Delaware City Refinery, April 1998 - March 2000
  • ESSA Technologies 2001: Review of Report on Impingement and Entrainment at the Cooling Water Intake Structure of the Delaware City Refinery, April 1998 - March 2000
  • EPA 2002: Delaware Estuary Watershed Case Study
  • Kahn 2008: Impacts of Impingement and Entrainment Mortality by the Delaware City Refinery on Fish Stocks and Fisheries in the Delaware River and Bay

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