TECHNOLOGY FOCUS - BIOLOGY - Preferred Process: The process further involves providing a bacterial microbe(s) sufficiently near to the organic material, to enable a reaction between the organic material and the media contaminant. Profusion of the microbe includes relying on natural microbes that exist in the media. The emulsion is applied into the media by spreading the emulsion onto the surface of the media for infiltration into the media by gravity. It is applied to the media either before or after it is submerged within an anaerobic basin to intercept and treat contaminated surface water flowing into and through the media.Preferred Components: The microbe enables the reduction of sulfate contaminant in the media to a sulfide under anaerobic conditions. It can be Desulfovibrio, Desulfomonas or Desulfomaculum. It also enables the precipitation of a metal contaminant within the media as a metal sulfide, and the alteration of the chemical composition of a water soluble inorganic contaminant or a chlorinated hydrocarbon contaminant in the media to a less environmentally harmful composition. The contaminated surface water is acid rock drainage. The media can be soil, earth, surface mining waste rock, underground mining waste rock, mill tailings, chemically leached ore heaps, industrial waste piles, sludge ponds or landfills.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The microbe is included in the emulsion. The organic phase is capable of donating an electron in a chemical reaction. The organic material promotes adhesion of the emulsion to the media and it is derived from minerals or vegetables. It also comprises refined petroleum. The solvent comprises naphtha, kerosene, diesel fuel, fuel oil, oil gas, and/or petroleum distillates. The emulsion comprises a biological nutrient for sustaining bacteria in the media. The biological nutrient is a water soluble organic material or carbohydrate. The emulsion includes an emulsifying reagent from anionic surfactant, cationic surfactant or non-ionic surfactant. The aqueous phase comprises a carbohydrate.Preferred Composition: The solvent content of the organic material is greater than 20%. The organic material in the emulsion is greater than 1/10 of 1% or less than 80% of the emulsion. The emulsifying reagent is greater than 2% or less than 5% of the volume of the emulsion. The organic material comprises an asphalt and/or an asphalt dissolving solvent. The asphalt content of the organic material is less than 50%.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The biological nutrient is phosphate or nitrogen. The metal contaminant can be arsenic, antimony, cadmium, nickel, zinc, cobalt, manganese, silver or iron. The inorganic contaminant includes at least one selected from: CN-, NO3-, NO2-, SeO42-, Cr6+, or UO22+. The aqueous phase comprises water soluble electron donor material. EXAMPLE - A 20% asphalt emulsion was prepared and used to evaluate its infiltration into 30 mesh washed sand, contained in a vertical column. Emulsions (1500 ml) were added to the wet, drained sand column. Clear water (1350 ml) was recovered, indicating that the emulsion infiltrated in nearly plug flow, pushing out some of the retained water. Additional emulsion was gradually added and resulted in an additional clear water drainage of 1700 cc. After addition of emulsions, the column was rested 21 days to allow emulsion to disengage before to water leaching test. Water (4.5 L) was passed through the column. Laboratory analysis of the drain water showed that in contained only 0.03% asphalt and 0.01% mineral matter. The cumulative asphalt loss was less than 0.5%, therefore the asphalt retained in the first 15 ft of a simulated media heap was 99.5%.