2012 Ocean Ranger Guidebook Revision 3-7-12 - Alaska ...

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2012 Ocean Ranger Guidebook 3-7-12 Table 1: Sewage and Graywater Discharges (Large Cruise Ships) What? Stationary 1 Continuous 2 Title XIV AK Waters 3 Outside 12 nm 4 Treated Wastewater AK GP USCG Approval AK GP Yes Untreated Wastewater No No No Yes 5 Sludge/Biosolids No No No Yes Table 2: Other Wastewaters (Large Cruise Ships) (note wastewater could be comingled) What? Within 3 nm Outside 3 nm Outside 12 nm 6 Pool/spa water De-chlorinate, debrominate Yes Yes Boiler water No 7 Yes Yes Ballast water 8 Varies Varies Varies Hazardous Waste No No No Oily water 9 No No No Table 3: Solid Wastes What? Within 3 nm Outside 3 nm 10 Outside 12 nm 11 Food wastes No Yes if ground Yes Paper, glass, metal, rags, No Yes if ground or Yes refuse communited Packing Materials that No No Yes outside float (not plastics) 25 nm Plastics No No No 1 Stationary in the Alaska 2010 Wastewater General Permit is defined as less than 6 knots speed. 2 Continuous discharge is within 1 nautical mile from nearest shore or less than 6 knots speed. 3 For wastewater from large cruise ships, includes the whole of the Alexander Archipelago in Alaska and within 3 nm from shore as defined in 33 CFR 159.305 4 Outside United States Territorial Seas 5 Needs to be discharged underway and at a moderate rate of discharge if stored in holding tanks. 6 Outside United States Territorial Seas 7 Unless conditions in the EPA VGP are met. 8 Requirements of EPA VGP must be met, see EPA VGP for details on where discharge is allowed 9 More than 15 ppm of oil. 10 3 nautical miles from shore. Alaskan waters for most definitions. 11 Outside United States Territorial Seas 12
2012 Ocean Ranger Guidebook 3-7-12 Subsection 2: General Wastewater Related General note- for EPA VGP items the definition of minimize is “reduce and/or eliminate to the extent achievable using control measures (including best management practices) that are technologically available and economically practicable and achievable in light of best marine practice. Job Aid Item: 1.2.a Text: Boiler blow down water is handled IAW (VGP 2.2.6) What to check for: Boiler/economizer blowdown may not be discharged in EPA VGP waters (3nm) unless the conditions stated in the VGP are met. Information: Boiler blowdown discharge can contain high levels or metals or other priority pollutants. The EPA determined that this discharge should be mimized near shore and in port. Boilers on board of modern large cruise ships are not for the generation of steam for main propulsion. The generated steam is used for heating purposes. Most vessels have dedicated tanks where the “boiler blow downs” are stored. The boilers have “top and bottom” blown downs. Some vessels do periodical blow downs (top bottom), other vessels have these blown downs automated (with a timer) others do continuous blown downs. It has been noticed in previous seasons that some vessels directed their blow down water into bilge spaces and treated this water through the OWS system. From there the treated water was comingled with the influent of the AWTS. The OR needs to understand these operations in detail and to document this, including the estimated volumes. In general the blow down volumes should correlate closely to the boiler system makeup water. Citation: EPA VGP 2.2.6 Boiler/Economizer Blowdown Minimize the discharge of boiler/economizer blowdown in port if chemicals or other additives are used to reduce impurities or prevent scale formation. For vessels greater than 400 gross tons which leave the territorial sea at least once per week, boiler/economizer blowdown may not be discharged in waters subject to this permit, unless: • The vessel remains within waters subject to this permit for a longer period than the necessary duration between blowdown cycles, • The vessel needs to conduct blowdown immediately before entering drydock, or • For safety purposes. For all vessels, boiler/economizer blowdown may not be discharged in waters referenced in Part 12.1 except for safety purposes. Furthermore, boiler/economizer blowdown should be discharged as far from shore as practical. 13
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In May of 1965, a total of 15” of
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2012 Ocean Ranger Guidebook Revision 3-7-12 - Alaska ...

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