Abstract: An in-situ steam thermal desorption process for remediating pesticide contaminated sites comprises S1, determining a contaminated layer; S2, primary steam injection; S3, secondary steam injection and regulator injection; wherein the regulator comprises the following components in parts by weight: 0.2-0.8 parts by weight of hyper-thermophilic microbial agent, 0.5-0.9 parts by weight of carbamyl phosphate, 2-3 parts by weight of cyclic 2,3-diphosphoglycerate, 3-4 parts by weight of ethylenediamine tetraacetic acid, 15-17 parts by weight of wort, and 5-6 parts by weight of sodium octadecyl sulfate; S4, tertiary steam injection; S5, conservation.

Abstract: A subsurface soil purification method including: warming an activator liquid, for stimulating decomposer microorganisms that decompose a contaminant in subsurface soil, to a higher temperature than a groundwater temperature, and feeding the activator liquid into the subsurface soil by injecting the activator liquid into an in-ground injection well; warming an activator liquid, for stimulating decomposer microorganisms that decompose a contaminant in subsurface soil, the decomposer microorganisms being infused in the activator liquid, to a higher temperature than a groundwater temperature, and feeding the activator liquid into the subsurface soil by injecting the activator liquid into an in-ground injection well, or warming a purification liquid for decomposing a contaminant in subsurface soil, to a higher temperature than a groundwater temperature, and feeding the purification liquid into the subsurface soil by injecting the purification liquid into an in-ground injection well.

Abstract: Isolation and decontamination of a block of soil (1) containing at least one pollutant, a first array of drains (11) being placed substantially vertically in the block of soil, a first array of connectors (13) being connected to the drains of the first array of drains. The first array of connectors is selectively connected to a gas and/or fluid extraction system (10) or to an unpolluted-fluid injection system (10).

Abstract: A remediation system for decontaminating a polluted site that delivers a remediation fluid to the polluted site and receives a contaminated effluent from the polluted site. The system includes a reactor that receives the contaminated effluent and generates an exit fluid stream and a first flow control mechanism coupled to the outlet of the reactor that releases a controlled portion of the exit fluid from the system, and delivers the remaining portion of the exit fluid as the remediation fluid, or delivers the remaining portion to a second flow control mechanism for combination with a controlled quantity of the second reactant to form the remediation fluid.

Abstract: A system for decontaminating a soil and groundwater region. The system has a well manifold assembly comprising a conduit adapted to be inserted into a contaminated area of the soil and groundwater region, a vacuum system for withdrawing fluid and vapor from the soil and groundwater region, and a remediating fluid injection system in fluid connection with the conduit. The remediating fluid injection system is adapted to inject a remediating fluid into the soil and groundwater region for treating contaminants in the soil and groundwater region. The conduit is linked to both the remediating fluid injection system and to the vacuum system. The vacuum system is operated to perform a dual-phase extraction of fluid and vapor from the soil and groundwater region to create a negative pressure in the soil and groundwater region. Next, remediating fluid is injected into the soil and groundwater region.

Abstract: A remediation system and method for decontaminating a polluted site. An outlet system is to deliver a remediation fluid to the polluted site, and an inlet system receives a contaminated effluent from the polluted site. A processing system extracts a contaminant component from the contaminated effluent. A reactor receives the extracted contaminant component as a first reactant, and also, a second reactant. The reactor generates a reaction product-containing exit fluid stream, a controlled portion of which is released from the system. The remaining portion of the reactor exit fluid forms the remediation fluid. Optionally, the remaining portion is combined with a controlled quantity of the second reactant to form the remediation fluid. In addition, a controlled quantity of diluent/coolant fluid may be delivered into a reaction process in the reactor and/or downstream of the reaction process, and/or separately in a heat transfer system.

Abstract: The present invention provides systems and methods for the remediation of contaminated water, soils and/or sediments. In some embodiments, the system includes one or more conduits for injection of hydrogen peroxide and ozone based reagents.

Abstract: A soil aerating machine includes in combination a skid-steer and a basket resembling a loader bucket adapted for attachment to the skid-steer boom. An air pressure tank, an elongate air nozzle pipe, an air hammer, and air control valves for the air nozzle pipe and air hammer are carried within the basket. The elongate air nozzle is attached to the basket using a pivotal bearing surface, which permits controlled motion therebetween. The air hammer is used to assist with the driving of the elongate air nozzle pipe into an earthen medium. A blast of air is then released through the air nozzle pipe into the earth, to loosen and aerate packed or clogged soil. A method of restoring a septic system using the preferred apparatus is also described, as are various alternative apparatus and method steps.

Abstract: Apparatus suitable for venting and dispensing gas from an area of ground. The apparatus comprising a passage arrangement locatable in the ground extending generally horizontally and formed from a plurality of self-supporting open units. One or more columns extends downwardly from the passage, the columns being formed of a core material having an open permeable structure. The or each column has a fluid permeable exterior, and is in communication with the passage.

Abstract: Apparatus for active in situ multi-element gas sparging for bioremediation or physico-chemical degration for removal of contaminants in a soil formation containing a subsurface groundwater aquifer or a substantially wet unsaturated zone, the multi-gas contained in bubbles, wherein the apparatus includes a plurality of injection wells extending to a depth of a selected aquifer; introducing an oxidizing agent comprising ozone mixed with ambient air to provide a multi-element gas by means of microporous diffusers, without applying a vacuum for extraction of stripped products or biodegration by-products, wherein said diffusers form micro-fine bubbles containing said multi-element gas that oxidizes, by stripping and decomposition, chlorinated hydrocarbons from the aquifer and surrounding saturated soil formation into harmless by-products; also including a pump for agitating water in the well selecting microbubbles, injecting them into the aquifer and effective to alter the path of micro-fine bubbles through a poro

Abstract: A method and system for removing free phrase product from the surface of a subterranean body of water includes a plurality of extraction sites. The extraction sites extend below ground and intersect the free product. Each of the plurality of extraction sites is in communication with a vacuum supply which provides suction to remove free product from the surface of the groundwater.

Abstract: A trench located in a landfill including the combination of a liquid infiltration piping system and a horizontal gas withdrawal piping system, the combination allowing for simultaneous liquid infiltration and gas withdrawal from a landfill.

Abstract: A process for removing pollutants from soil with the aid of a stripping gas which involves (a) injecting the stripping gas into the soil at the level of and/or under the pollutant, (b) volatilizing the pollutant with the stripping gas, so that it rises to the ground level above the pollutant, (c) collecting and further treatment of the volatilized pollutant, a pneumatic screen being provided in the soil along the circumference of the polluted area.

Abstract: A system and method for the accelerated decontamination of contaminated soil, vadose zone and/or groundwater is described. Contaminates are removed from soil and from the groundwater via heat injection through trenching or directionally drilled or horizontally drilled and installed delivery plumbing, pure oxygen injection through separate plumbing installed in the same manner as the plumbing used to deliver the heat, bioventing, sparging, and bioremediation, all through the oxygen delivery plumbing, and soil vapor extraction through vertical wells, all contained in one mobile treatment system. Contaminants are separated from the soil gas via filtration or oxidation. Residual contaminants in the vadose zone and/or the in the groundwater are subjected to volatilization by increased temperature via heat injection and/or oxidation via contaminant degrading microorganisms.

Abstract: An in situ thermal desorption (ISTD) soil remediation system may be used to remove or reduce contamination within soil. Heat may be transferred to the soil from resistively heated, bare metal heater elements. The heater elements may be placed directly within the soil. Alternately, the heater elements may be suspended within casings. The heater elements may be conductive heaters, or the heater elements may be radiative heater elements. The ISTD soil remediation system may include temperature-resistant, chemical resistant, flexible conduits that transport off-gas removed from the ground to a treatment facility. A residence time of off-gas within the conduits may be sufficient to allow the off-gas to cool so that the off-gas may pass to a treatment facility through a manifold and piping made of polymeric material.

Abstract: The invention relates to a process for removing pollutants from soil with the aid of a stripping gas which involves

Abstract: A soil remediation system, such as an in situ thermal desorption system, may be used to treat contaminated soil in a treatment area with an arcuate obstruction in the treatment area. A pattern of wells may be positioned to avoid placing a well in a wall of the obstruction. The well pattern may be oriented based upon the center of the obstruction. A well of the well pattern may be placed at the center of the obstruction. Alternatively, the center of the obstruction may be positioned at a centroid of a unit of the well pattern, or at the midpoint of a side of a unit of the well pattern. The well pattern may be a regular pattern that is positioned so that the arcuate obstruction is placed within a large gap between adjacent orbitals (or rings) of the regular well pattern.

Abstract: The invention relates to a process for removing pollutants from soil with the aid of a stripping gas which involves (a) injecting the stripping gas into the soil at the level of and/or under the pollutant, (b) volatilizing the pollutant with the stripping gas, so that it rises to the ground level above the pollutant, (c) collecting and further treatment of the volatilized pollutant, a pneumatic screen being provided in the soil along the circumference of the polluted area.

Abstract: A method of remediating a site of earth and groundwater contamination includes the steps of drilling at least one injection well, and preferably a plurality of injection wells, into the groundwater in a contaminated area. At least one, and preferably a plurality of extraction wells, are drilled into the earth above the groundwater, the vadose zone, in the contaminated area. The surface of the earth above the contaminated area is sealed, such as by a layer of concrete, asphalt, or plastic sheeting. Air and nutrients are injected into the contaminated area through the injection wells. The air is injected on a substantially continuous basis while the nutrients are injected on a batch basis. Air and vapor is extracted on a substantially continuous basis from the contaminated area by the extraction wells, which may be either vertically or horizontally positioned.

Abstract: A method comprises conducting a permeable-reactive barrier (PRB) treatment of a contaminated aqueous medium and in-well monitoring effectiveness of the permeable-barrier treatment. A system comprises a PRB zone to treat a contaminated groundwater and an in-well sensor located within a gradient of the contaminated groundwater or within the PRB zone to sense a characteristic of the groundwater.

Abstract: The remediation treatment creates environmentally neutral species from hydrocarbon contaminants. For soils having a low porosity, fissures are created in the site by, for example, fluid, i.e., hydraulic or pneumatic, fracturing. A catalyst is injected into the site and is permitted to diffuse through the site. An oxidizing agent is then introduced into the site to release a free radical in a Fenton-type reaction. The compounds react to release a free radical, which acts upon the contaminants to form environmentally neutral species. Diffusion of both compounds is aided by turbulence induced in the groundwater. A pH-adjusting compound is added to optimize reaction conditions. Reaction vapors are collected above ground, filtered, and vented to the atmosphere, reducing the chance for gas pressure buildup and possibly dangerous, potentially explosive conditions.

Abstract: A method of remediating a site of earth and groundwater contamination includes the steps of drilling at least one injection well, and preferably a plurality of injection wells, into the groundwater in a contaminated area. At least one, and preferably a plurality of extraction wells, are drilled into the earth above the groundwater, the vadose zone, in the contaminated area. The surface of the earth above the contaminated area is sealed, such as by a layer of concrete, asphalt, or plastic sheeting. Air and nutrients are injected into the contaminated area through the injection wells. The air is injected on a substantially continuous basis while the nutrients are injected on a batch basis. Air and vapor is extracted on a substantially continuous basis from the contaminated area by the extraction wells, which may be either vertically or horizontally positioned.

Abstract: Apparatus for active in situ multi-element gas sparging for bioremediation or physico-chemical degration for removal of contaminants in a soil formation containing a subsurface groundwater aquifer or a substantially wet unsaturated zone, the multi-gas contained in, bubbles, wherein the apparatus includes a plurality of injection wells extending to a depth of a selected aquifer; introducing an oxidizing agent comprising ozone mixed with ambient air to provide a multi-element gas by means of microporous diffusers, without applying a vacuum for extraction of stripped products or biodegration by-products, wherein said diffusers form micro-fine bubbles containing said multi-element gas that oxidizes, by stripping and decomposition, chlorinated hydrocarbons from the aquifer and surrounding saturated soil formation into harmless by-products; also including a pump for agitating water in the well selecting microbubbles, injecting them into the aquifer and effective to alter the path of micro-fine bubbles through a por

Abstract: A device for treating the ground in the vicinity of buried structures, comprises a plurality of probes which are driven into the subsoil and are connected to a control unit provided with an air generating device for generating, within the ground, a flow of dry air. The probes are arranged so as to make the generated air flow lap all the surfaces of the buried structures.