U.S. Navy Ship Salvage Manual Volume 6 - Oil Spill Response

S0300-A6-MAN-060Figure 5-10. Screw Pump.• Light oils - Weir, suction, inclined plane, hydroclone, vortex.• Medium oils - Rope mop, oleophilic types, inclined plane, vortex.• Heavy oils - Oleophilic belt, rope mop, weir.Induction types are not effective for recovering small slicks spread over a wide area.In general, even the most rugged recovery equipment is not effective in waves greater than sixfeet, winds greater than 20 knots or currents greater than one knot. Average wind and current conditionsin many U.S. ports approach these limits.5-3.1 Spill Containment. As mentioned previously, recovery devices are more efficient inthicker oil layers. Booms and other barriers can collect or guide oil into smaller areas to increaselayer thickness or to guide oil directly into recovery systems.5-3.2 Storage of Recovered Oil. Oil recovery systems can remain in operation only so long asthere is someplace to store the recovered oil for eventual disposal or recycling. Oil can be storedin tank barges, oil storage bladders, small tankers, shore facilities or portable tanks on barges orashore. Storage vessels should be sited near skimmer operating areas to minimize lost skimming5-14