TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Method: The method further comprises the additional step of preheating the vessel to a minimum temperature with the steam prior to the induction of the solvent and surfactant. The joining is accomplished using a T-fitting. The surfactant and solvent are introduced into the steam by joining the steam, surfactant, and solvent sources. The surfactant and solvent are combined prior to being introduced into the steam. The removal of vaporous effluent step further comprises the step of venting the vaporous effluent to the atmosphere, and optionally directing the condensed effluent into a flare. The vessel is drained to remove any dissolved contaminants from the vessel. The processing fluids are reintroduced to the operation to remove undissolved contaminants from the vessel along with the flow of processing fluids.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The surfactant comprises a linear alcohol ethoxylate (12-15C) with an ethoxylated propoxylated end cap and a fatty alkanolamide. It can comprise nonylphenol polyethoxylate, straight chain linear alcohol ethoxylate, linear alcohol ethoxylate with block copolymers of ethylene and propylene oxide, oleamide DEA, and/or diethanolamine. The solvent is organic, preferably comprises terpene. The terpene is monocyclic saturated terpene such as para-methane, monocyclic unsaturated isoprenoid, or bi-cyclic pine terpene. The organic solvent may comprise a mixture of monocyclic unsaturated isoprenoids and/or a mixture of bicyclic pine terpenes. The solvent is geraniolene, myrcene, dihydromycene, ocimene, allo-ocimene, rho-methane, carvomethene, methane, dihydroterpinolene, dihydrodipentene, alpha-terpinene, gamma-terpinene, alpha-phellandrene, pseudolimonene, limonene, d-limonene, 1-limonene, d,l-limonene, isolimonene, terpinolene, isoterpinolene, beta-phellandrene, beta-terpinene, cyclogeraniolane, pyronane, alpha-cyclogeraniolene, beta-cyclogeraniolene, gamma-cyclogeraniolene, methyl-gamma-pyronene, 1-ethyl-5,5-dimethyl-1,3-cyclohexadiene, 2-ethyl-6,6-dimethyl-l,3-cyclohexadiene, 2-rho-menthene l(7)-rho-methadiene, 3,8-p-menthene, 2,4-rho-menthadiene, 2,5-rho-menthadiene, l(7),4(8)-rho-methadiene, 3,8-rho-menthadiene, l,2,3,5-tetramethyl-1-3-cyclohexadiene, 1,2,4,6-tetramethyl-1,3-cyclohexadiene, 1,6,6-trimethylcyclohexene and 1,1-dimethylcyclohexane, norsabinane, northujene, 5-isopropylbicyclohex-2-ene, thujane, beta-thujene, alpha-thujene, sabinene, 3,7-thujadiene, norcarane, 2-norcarene, 3-norcarene, 2-4-norcaradiene, carane, 2-carene, 3-carene, beta-carene, nonpinane, 2-norpinene, apopinane, apopinene, orthodene, norpadiene, homopinene, pinane, 2-pinene, 3-pinene, beta-pinene, verbenene, homoverbanene, 4-methylene-2-pinene, norcamphane, apocamphane, campane, afenchane, alpha-fenchene, sartenane, santane, norcamphene, camphenilane, fenchane, isocamphane, beta-fenchane, camphene, beta-fenchane, 2-norbornene, apobornylene, bornylene, 2,7,7-trimethyl-2-norbornene, santene, 1,2,3,-trimethyl-2-norbornene, isocamphodiene, camphenilene, isofenchene, and/or 2,5,-trimethyl-2-norbornene.