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

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2012 Ocean Ranger Guidebook 3-7-12 What to check for: Check that procedures are in place to monitor opacity emissions and limit visible emissions over the state regulatory limit. Figure 2: Opacity meter Figure 3: High opacity apparently cause by fuel issues Figure 4 Sample opacity graph 152
2012 Ocean Ranger Guidebook 3-7-12 The opacity regulations apply to all stacks from all combustion sources installed on board of the vessels. This includes boilers, incinerators, dryers, diesel engines, gas turbines etc. Often factors or combinations of factors with regard to operational practices, poor fuel treatment, poor fuel quality and not well maintained equipment are possible elements for opacity exceedances. Short summary of allowances above the opacity limit: 1) Over 20% for more than 3 minutes in any hour in any operating mode 2) Over 20% for any 6 minutes in an hour during startup while preparing to depart 3) For the hour after casting off or weighing anchor either a. 40% limit for that hour or b. Up to 9 minutes over 20% 4) For the hour prior to casting off or weighing anchor either a. 40% limit for that hour or b. Up to 9 minutes over 20% Citations: 18 AAC 50.070. Marine vessel visible emission standards. Within three miles of the Alaska coastline, visible emissions, excluding condensed water vapor, may not reduce visibility through the exhaust effluent of a marine vessel by more than 20 percent except as follows: (1) while at berth or at anchor, visibility may be reduced by up to 100 percent for periods aggregating no more than (A) three minutes in any one hour; and (B) an additional three minutes during initial startup of a vessel; for purposes of this subparagraph, "initial startup" includes the period during which a vessel is testing equipment in preparation to casting off or weighing anchor; (2) during the hour immediately after weighing anchor or casting off, visibility may be reduced under one, but not both, of the following options: (A) visibility may be reduced by up to 40 percent for that entire hour; or (B) visibility may be reduced by up to 100 percent for periods aggregating no more than nine minutes during that hour; (3) during the hour immediately before the completion of all maneuvers to anchor or make fast to the shore, visibility may be reduced under one, but not both, of the following options: (A) visibility may be reduced by up to 40 percent for that entire hour; or (B) visibility may be reduced by up to 100 percent for periods aggregating no more than nine minutes during that hour; and (4) at any time not covered by (1) - (3) of this section, visibility may be reduced by up to 100 percent for periods aggregating no more than three minutes in any one hour. (Eff. 1/18/97, Register 141; am 6/21/98, Register 146) 153
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2012 Ocean Ranger Guidebook Revision 3-7-12 - Alaska ...

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