How NOAA responds to spills?
NOAA is a 24/7 service that monitors and waits for a help if there is a spill. They help protect and conserve the natural resources. As soon as they got call they go to the scene as fast as possible. They inspect the vessel, and study the spill, damage and spread in the affected area. We determine the success of their operation through the response of NOAA. NOAA Office of Response and Restoration has a mission based on the online source, http://www.noaanews.noaa.gov/stories2004/s2353.htm:
OR& R. is currently assisting with trajectory modeling, oil fate forecasting, weather, and information management and participating in over flights and resource and shoreline assessment. Trajectory modeling uses oceanographic, meteorology and hydrographic information to forecast where the spill might go and its potential effects on the coastal environment. Shoreline assessment is done by surveying affected shoreline, segment by segment, to collect information about the shoreline habitats and degree of oil contamination. This information is used to assist in both determining how cleanup resources will be used and identifying trust resources that have been impacted.
Responding is only the beginning but the hard part is the restoration of the affected area. It is hard to re-establish the damage areas because they will monitor it and try to put back what it had lost.
What kind of chemicals do they use for cleanup?
There are several ways on cleaning up the surface of the water, it is much easier to clean the water if it only resides on the surface of the water but then it m ay take too long. According to http://www.darp.noaa.gov/, there are three basic classes of absorbents to use for spill clean up:
natural organic materials like peat moss, straw, hay, and sawdust.
mineral-based materials like vermiculite, perlite, and volcanic ash.
synthetic organic sorbents like rubber, polyester foam, polystyrene, and polyurethane.
The synthetic organic were used frequently because it absorbs more oil and can be reprocessed. But then instead of reprocessing it they examine it first and recycle it because there might be other consequences t they just reprocess the oil.
There are two techniques that they clean up the spill of oil in the marine water, first is through "dispersant chemicals" and the second is through "containment and recovery." Chemical dispersants are being sprayed in the oil. This dispersants consist surfactant wherein oil will not be mix to the water and solvent wherein it will act as a carrier to the surfactant. The three main types of dispersants are, based on the online source, http://www.itopf.com/containment.html:
Type 1 dispersants are based on hydrocarbon solvents with between 15 and 25% surfactant. They are sprayed neat onto the oil as pre-dilution with seawater renders them ineffective. Typical dose rates are between 1:1 and 1:3 (dispersant:oil).
Type 2 dispersants are dilutable concentrate dispersants which are alcohol or glycol (i.e. oxygenated) solvent-based with a higher surfactant concentration. Dilution is normally 1:10 with seawater.
Type 3 dispersants are also concentrate dispersants with a similar formulation to type 2 products. However, they are designed to be used neat and typical dose rates are between 1:5 and 1:30 (neat dispersant:oil).
The containment and recovery uses booms so that oil would stick together and concentrate the floating oils thereby it will prevent from spreading all over. Booms features based on the online source, http://www.itopf.com/containment.html:
1. freeboard to prevent or reduce splash over;
2. sub-surface skirt to prevent or reduce escape of oil under the boom;
3. flotation by air or some buoyant material;
4. longitudinal tension member (chain or wire) to provide strength to withstand the effects of winds, waves and currents. This is often used to provide ballast to keep the boom upright in the water.
If the clean up were done booms should be cleaned and repaired so that it can be use to another spill. But before they use it again, test should be made to know if it is still effective and will work properly.
There are different kinds of tools for clean up of oil spills and these are being practice in different areas for quick prevention of spreading. Here are the list of tools based on the online source, http://response.restoration.noaa.gov/topic_subtopic_entry.php?RECORD_KEY%28entry_subtopic_topic%29=entry_id,subtopic_id,topic_id& entry_id (entry_subtopic_topic)=184& subtopic_id (entry_subtopic_topic)=27& topic_id (entry_subtopic_topic)=3:
booms,...
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