A system is disclosed for remediation of contaminated earth from hazardous substances, comprising mobile equipment that are generally available. The mobile equipment are physically separate and temporarily organised at a location in the proximity of a contaminated site when the need arises and are dispersed or disposed of following remediation of the contaminated site. The generally available mobile equipment may include earth moving excavators, truck mixers equipped with tumblers used for mixing and delivering cement-concrete to the construction site, and centrifuges.

A method of treating mercury-contaminated material to obtain a treated product having reduced mercury leachability includes the steps of (a) admixing the mercury-contaminated material with a reagent system comprising calcium sulfide (CaS) and trisodium phosphate (TNaP), wherein the calcium sulfide and trisodium phosphate are preferably provided at a CaS:TNaP ratio of from 2:1 to 1:2, on a dry weight reagent basis, and the reagent system is preferably provided in an amount equal to 0.4% to 5% by weight of the contaminated material; and (b) adding water as needed to achieve a moisture content of at least 5% by weight of the contaminated material.

A system and method of creating, operating and maintaining a hydrocarbon storage facility in a salt cavern within an underground salt deposit. The system is portable and can be transported to areas near different well heads. The portability also enables adjacent well heads to be worked in succession to create a large storage cavern by interlinking a series of smaller caverns. This formation processes ensures that a storage cavern can be isolated within the confines of a salt deposit. Using the same portable equipment, the system can be configured to form a salt cavern, displace stored material out of a salt cavern, and repair or maintain a salt cavern well.

A system for sand cleaning including: a cleaning unit arranged to receive oil impregnated sand; the unit including a chamber having an impeller, said impeller arranged to agitate the oil impregnated sand in a base of the unit; an aperture in the base of the unit arranged to discharge the treated sand; an oil outlet adjacent to a top of the unit arranged to discharge the separated oil.

A system for treating a contaminated soil. The system includes a soil receptacle, a first conveyance mechanism in communication with the soil receptacle, and a second conveyance mechanism in communication with the first conveyance mechanism. The second conveyor is placed lower relative to the first conveyor so that the contaminated soil drops in elevation as it passes from the first conveyor to the second conveyor. One or more pretreatment sprayers are positioned substantially at a junction between the first conveyor and the second conveyor and that spray the contaminated soil as it moves from the first conveyor to the second conveyor. One or more sprayers are also positioned on the second conveyor such that they can spray the contaminated soil as it passes. An aerator is located at a depositing end of the second conveyor, by which the contaminated soil is further aerated as it drops of the depositing end of the second conveyor and contacts the aerator. One or more optional final sprayers can be positioned on the second conveyor such that they are able to spray the contaminated soil as it drops off the depositing end and contacts the aerator.

A system for treating a contaminated soil. The system includes a soil receptacle, a first conveyance mechanism in communication with the soil receptacle, and a second conveyance mechanism in communication with the first conveyance mechanism. The second conveyor is placed lower relative to the first conveyor so that the contaminated soil drops in elevation as it passes from the first conveyor to the second conveyor. One or more pretreatment sprayers are positioned substantially at a junction between the first conveyor and the second conveyor and that spray the contaminated soil as it moves from the first conveyor to the second conveyor. One or more sprayers are also positioned on the second conveyor such that they can spray the contaminated soil as it passes. An aerator is located at a depositing end of the second conveyor, by which the contaminated soil is further aerated as it drops of the depositing end of the second conveyor and contacts the aerator. One or more optional final sprayers can be positioned on the second conveyor such that they are able to spray the contaminated soil as it drops off the depositing end and contacts the aerator.

A contaminated soil purification system for decomposing a contaminant in contaminated soil E. The contaminated soil purification system includes: injecting, into contaminated soil through a water injection well, an injection liquid containing a purification agent to decompose a contaminant or an activator to stimulate biological decomposition by the purification agent; a process of measuring a concentration of the purification agent or the activator in groundwater in an observation well or in a pumping well, the observation well or the pumping well being provided at a location spaced apart from the water injection well; and a process of, based on the concentration that has been measured, automatically controlling an addition amount of the purification agent or the activator to the injection liquid or automatically controlling a pumping amount of water from the pumping well.

A contaminated soil purification system for decomposing a contaminant in contaminated soil E. The contaminated soil purification system includes: injecting, into contaminated soil through a water injection well, an injection liquid containing a purification agent to decompose a contaminant or an activator to stimulate biological decomposition by the purification agent; a process of measuring a concentration of the purification agent or the activator in groundwater in an observation well or in a pumping well, the observation well or the pumping well being provided at a location spaced apart from the water injection well; and a process of, based on the concentration that has been measured, automatically controlling an addition amount of the purification agent or the activator to the injection liquid or automatically controlling a pumping amount of water from the pumping well.

A system and method for extracting hydrocarbons utilizing recirculated washing medium to enhance efficiency. Some embodiments include a helical agitation member configured to promote extended contact between material containing hydrocarbons and a washing medium.

A system and method for extracting hydrocarbons utilizing recirculated washing medium to enhance efficiency. Some embodiments include a helical agitation member configured to promote extended contact between material containing hydrocarbons and a washing medium.