File:Coast watch (1979) (20472997640).jpg

English:
Left to right, top to bottom: The deck of the Tonsina — note ballast tanks along the sides and bottom of the tanker. Ballast water-sampling equipment at the ready. Filling a sample bottle with water pumped from one of the Tonsinas 12 ballast tanks. Fine-meshed zooplankton nets capture ballast water organisms. Zooplankton samples are concentrated in the plankton net and placed in a plastic container.

Title: Coast watch
Identifier: coastwatch00uncs_16 (find matches)
Year: 1979 (1970s)
Authors: UNC Sea Grant College Program
Subjects: Marine resources; Oceanography; Coastal zone management; Coastal ecology
Publisher: (Raleigh, N. C. : UNC Sea Grant College Program)
Contributing Library: State Library of North Carolina
Digitizing Sponsor: North Carolina Digital Heritage Center

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On the lower Columbia River, a natural boundary between the states of Oregon and Washington, at least 61 of the 292 known plant and animal species are non-native. Some, such as the Asian clam (Corbiculaflumine, so thoroughly dominate the sediment in some stretches of the Columbia that little else can survive. If that's not bad enough, these dumped. For nearly two years, Herwig's crew has been testing the new equipment in the field, working aboard the oil tanker S/T Tonsina. It is one of a fleet of tankers that carries oil — and ballast water — from the Port of Valdez in Southeast Alaska, to Long Beach, Calif., Puget Sound, Wash., and other destinations along the Pacific Ocean coast. ballast water — and the Tonsina would provide a demonstration opportunity to evaluate how the ozone theories would translate to real shipboard experiences. HARMLESS, HI-TECH FIX Ozone gas is produced when an electrical impulse is shot through air that is rich ir
Text Appearing After Image:
LEFT TO RIGHT TOP TO BOTTOM: The deck of the Tonsina — note ballast tanks along the sides and bottom of the tanker. Ballast water-sampling equipment at the ready. Filling a sample bottle with water pumped from one of the Tonsina's 12 ballast tanks. Fine-meshed zooplankton nets capture ballast water organisms. Zooplankton samples are concentrated in the plankton net and placed in a plastic container. introduced pests can proliferate to such a degree that, like zebra mussels, they will eventually clog irrigation ditches and fish screens. With funding from a National Sea Grant initiative and other sources, Cooper and his West Coast counterpart, Russ Herwig, with the Washington Sea Grant Program in Seattle, are looking at ways to curb future introductions of ballast water organisms along the nation's coasts. For the past three years, Cooper has been working with a team of scientists to develop the technology to treat ballast water before it is This collaborative project began several years ago, when the Tonsina\ principal owner, British Petroleum, recruited Nutech 03, Inc. of MacLean, Va., to develop and design a shipboard ballast water treatment system, using ozone as the active ingredient. Nutech recruited Cooper to oversee the ozone chemistry at play. In turn, Cooper contacted Herwig and his colleagues at the University of Washington, asking them to conduct field tests of the system. Cooper and Herwig saw the national and international importance of applied research on "When you smell the air after a lightning storm, you're smelling ozone," Cooper explains. Ozone has been used for decades to disinfect drinking water, swimming pools and aquariums. It is incredibly effective at killing bacteria and viruses in water. Because it degrades quickly, reverting back to oxygen, it is safe for these freshwater applications. Today, the Tonsina is equipped with almost seven kilometers of stainless steel tubing through which ozone gas is conveyed to the ship's ballast water. The process is relatively 8 HOLIDAY 2003

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