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API TR 1152-2013 pdf free download

API TR 1152-2013 pdf free download.Industry Recommended Subsea Dispersant Monitoring Plan.
The existing NRT Guidance for Environmental Monitoring for Atypical Dispersant Operations, and EPA Region VI currently require that monitoring assets be in place prior to dispersant injection. FOSC approval should be sought for any required deviation from those policies. The purpose of the monitoring program outlined in this document is to obtain data that support real-time or near real-time operational decision-making. As such, its primary focus is to collect data on dispersant effectiveness, dispersed oil dilution, and dispersed oil fate. It is not designed to collect data on environmental impacts. Although it is important to collect this data, it is challenging to use it in real-time as it takes time to analyze, interpret, and draw conclusions about the environmental significance of the dispersant application operation. Separate vessels and field teams should be utilized, as appropriate, to support efforts to assess any environmental damage (i.e., NRDA) resulting from the oil spill. Finally it should be noted that this subsea monitoring plan may be integrated into other company-specific operational plans for source control, capping and containment, dispersant operations, data and sample quality control, worker health and safety, etc. 4.0 Subsea Dispersant Application Monitoring Guidelines Introduction Subsea dispersant injection has not been integrated into standard industry references on dispersant operations as it is a relatively new concept. The basic operations are as follows: • A surface vessel carries and supplies dispersants to the spill site. • Dispersant is injected from the surface vessel through a line that is connected to a nozzle held at the spill source by a Remotely Operated Vehicle (ROV). • The ROV positions the nozzle to directly inject dispersant into the flow of oil as close to the release point as possible. If possible, the nozzle should be inserted into the release point to inject dispersant into the oil before it discharges to the environment.
Aerial Monitoring 1. Aerial monitoring will be conducted before and during the application of the dispersant to determine if the use of dispersant is reducing the amount of oil reaching the surface 1 2. Flights will be conducted before and during the application of dispersant. These flights will occur only after sufficient time has elapsed to allow oil to fully express on the surface. Depending on the water depth, this could require several hours. Flights before dispersant application must allow sufficient time for untreated oil to reach the surface after initiation of the well-control event. Flights during dispersant application must allow time for the water column to clear of untreated oil and the surface slicks to transfer out of the observation area. Observations will be documented using visual assessments by trained observers and documented using photographic resources. Aerial monitoring efforts must take into account local currents that can potentially transport the rising oil (dispersed or not) some distance from the spill site, depending on the strength, depth, and direction of the currents.
1. VOC and %LEL monitoring equipment and trained users will be stationed on vessels located near the well site. Significant reductions in VOCs will indicate a reduction in fresh oil slicks near the well site. As with aerial monitoring, efforts must take to account local currents that can transport the rising oil (dispersed or not) some distance from the spill site and local wind direction that can transport VOCs away from surface vessels. VOC and %LEL measurement will be affected by surface conditions such as wind speed/direction and location of the monitoring device relative to the surface slick location. For example, vessels upwind of surface slicks could have low VOCs and %LEL even with surface slicks nearby. These additional variables could complicate interpretation of the VOC and %LEL data. These complications may limit the ability to draw definitive conclusions on the effectiveness of subsea dispersants from this data. Weather conditions should be reported along with all VOC data. Corresponding representative water samples should be collected and analyzed for individual constituents. A diagram should be prepared identifying the time and location of all VOC samples taken. VOC and %LEL data should also be provided to the FOSC, and the UC Safety Officer for gauging potential threats to workers.

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