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

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2012 Ocean Ranger Guidebook 3-7-12 (2) a description of how the daily volume by discharge type was estimated; Job Aid Item: 1.3.e Text: The daily estimated volumes of waste water discharged are recorded by type (AS 46.03.465(a) / 18 AAC 69.050, 33 CFR 159.315(b) What to check for: Check discharge logs, if a vessel has continuous or automatic discharges in Alaska then the volume of discharges must be calculated. Each type of effluent discharged must be calculated. Background: Operators must identify volumes discharged by type. When the regulations were adopted it was more common for multiple types of effluent to be discharged in Alaska waters- for example graywater and blackwater separately. Today it is much more common for treated discharge to be from one source (the AWTS). Discharge logs must include volume discharged. The seasonal report must list the methods used to calculate volumes. Some vessels meter, but some had at one point disconnected meters. It is important to know the systems and how volumes are calculated or estimated. Citation: 18 AAC 69.050. Treated sewage, graywater, and other wastewater discharge records and report. (c) For an automatic or continuous discharge, in port, at anchorage, or underway, of treated sewage, graywater, or other wastewater into the marine waters of the state, the records required by AS 46.03.465(a) must describe for each voyage (1) the daily estimated volume of discharge by type; Job Aid Item: 1.3.f Text: WW discharge performed IAW GP Authorization Letter. What to check for: Check discharge logs, what valves are open or closed, tank levels to see if a vessel is following the GP authorization letter. Background: The authorization letter will include what types of discharges the vessel is allowed in Alaskan waters, and will identify any limitations on that discharge. For example, some vessels are only allowed to discharge underway. These ships should be checked if there are any stationary discharges. Some vessels can only discharge specific types of wastewater, for example blackwater and accommodations graywater. In this example other graywater sources entering the waste stream such as galley water must be checked. An example of a GP authorization is included as wastewater example 1. See the WW table provided by ADEC for a list of what ships are authorized to discharge. Citation: ADEC WW GP 1.2 AUTHORIZED DISCHARGES This general permit only authorizes the discharge of treated sewage and treated graywater, in accordance with the conditions set forth herein. 30
2012 Ocean Ranger Guidebook 3-7-12 Job Aid Item: 1.3.h Text: Daily volumes were calculated / estimated /or metered in IAW (GP 1.5.6) What to check for: Total flow in cubic meters a day must be measured as a parameter in table 1 of the VGP. If the ship has a meter for effluent volume, this result must be used for the total flow measurement. Background: ADEC requires a total flow measurement from all wastewater treatment plants (not just ships). This is used to see if plant capacity was exceeded, and for information on total volumes of treated wastewater discharged. The 2010 permit included language that a meter must be used if installed after it was discovered some ships were estimating volume even when a meter was present. In fact, meters were disconnected. This made it more difficult to quantify actual volumes. Figure 18- WW flow meter Citation: ADEC WW GP 1.5.6 The first sample event for all parameters with effluent limits listed in Table 1 through Table 7 must occur within ten (10) days of the first discharge into marine waters of the state for each cruise ship season. The exception is total flow, which must be documented daily. If a ship has a meter that measures the total daily flow, the actual flow meter results (not estimations) must be reported on the Discharge Monitoring Report. Job Aid Item: 1.3.i Text: Waste water outflow quantity monitoring is functioning properly (if installed) IAW AK GP 1.5.6 31
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2012 Ocean Ranger Guidebook Revision 3-7-12 - Alaska ...

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