soil vapor Articles | Environmental XPRT

Horizontal Soil Vapor Extraction and Horizontal Air Sparge Wells Case Study-

Directional Technologies Is The Expert At Horizontal Soil Vapor Extraction A horizontal soil vapor extraction well and two horizontal air sparge wells rapidly remediate contamination in situ under a research and development facility. These horizontal wells were installed by environmental directional driller Directional Technologies with no access to inside this sensitve facility. This site was ...

Jul. 6, 2011

By Directional Technologies, Inc.

Common Treatment Train for Nonhalogenated SVOCs

A treatment train is the combination of different treatment technologies. A system diagram of a common treatment train for nonhalogenated SVOCs is illustrated below. A thermally enhanced soil vapor extraction system is used to pull SVOC vapor from the contaminated soil. Electrodes are installed in the contamination zone to enhance the desorption of SVOCs from the contaminated soil. The ...

Jan. 1, 1997

By Federal Remediation Technologies Roundtable

Soil and Ground Water Remediation Case Study

On this State Funded Clean-Up project, Global was the project engineer and was responsible for the design of an air sparging/soil vapor extraction remediation system. The system included five soil vapor extraction wells and twelve sparging wells that operated on a rotating schedule. One of the soil vapor extraction wells and nine of the sparging wells were installed as horizontal wells beneath ...

Sep. 3, 2016

By Global Environmental Engineering

Horizontal Soil Vapor Extraction Wells

As part of a Corrective Action Plan (CAP) submitted to NYSDEC, a consultant selected Horizontal Soil Vapor Extraction Wells (HSVE) to expand an on-site vapor extraction system in New York. Directional Technologies worked with the consultant on the horizontal well screen design and well layout of three (3) HSVE wells, spaced 50-feet apart, and constructed with 4-inch Schedule 80 PVC materials. Due ...

Apr. 19, 2017

By Directional Technologies, Inc.

Application of an innovative In-Situ thermal remediation process for removal of petroleum hydrocarbons at a former FDOT maintenance yard

Subsurface Petroleum Hydrocarbons: Recovery and Removal Mechanisms Dissolved-Phase Recovery Pump and Treat Vapor-Phase Recovery Soil Vapor Extraction, Air Sparging Biological Removal Natural Attenuation, Source: Biosparging ...

May 13, 2011

By McMillan-McGee Corp.

Soil Vapor Extraction (In Situ)

Introduction Soil vapor extraction (SVE) is an in situ unsaturated (vadose) zone soil remediation technology in which a vacuum is applied to the soil to induce the controlled flow of air and remove volatile and some semivolatile contaminants from the soil. The gas leaving the soil may be treated to recover or destroy the contaminants, depending on local and state air discharge regulations. ...

Jan. 1, 1997

By Federal Remediation Technologies Roundtable

Teflon fep Tubing for soil gas sampling

Suniu manufactures(in China) teflon fep tubing right for soil vapor sampling. By DTSC, teflon fep tubing is approved for soil gas sampling tubing. Our tube is without PFOA. It will be cleaned according to Class 6 of ISO146441(cleanroom standard). So there is almost ZERO moisture and no chemical contaminants in tubing. It will helps you get right result when collects soil vapor samples. Suniu ...

Jul. 11, 2019

By Dongguan Suniu Electronics Co., Ltd

Is a Horizontal Remediation Well System Right for My Project?

So your remediation project is moving towards a choice of remedy, whether it involves Dual Phase Extraction, Total Phase Extraction, Biosparging, Soil Vapor Extraction (SVE), Air Sparge (AS), or Chemox Delivery, or any combination of the above. Now, the concept of horizontal remediation wells (HRW’s) for your site seems intriguing. So what do you need to consider before proposing a ...

Jun. 8, 2017

By Directional Technologies, Inc.

South LA: SVE Case Study (C3 Technology)

An active industrial facility in South Central Los Angeles was impacted by tetrachloroethylene (PCE) and trichloroethylene (TCE; former staging area degreasing) operations as a part of its operations. A phased approach to soil vapor extraction (SVE) remediation was employed: the goal of Phase I was to attain high contaminant mass removal rates with very high VOC vapor concentrations typically ...

Oct. 29, 2014

By GEO Environmental Remediation Company

Steam Injection with Soil Vapor Extraction Remediation

Project description for soil vapor extraction / steam injection remediation by GWS Environmental Contractors Inc. The use and implementation of steam injection remediation on No 2. heating oil. Project Location: 18 Institute Street Freehold, NJ. Project: Residential Fuel Oil Remediation Project using Steam/SVE. I. Extent of Contamination: Fuel oil contamination exists in the rear yard immediately ...

Mar. 12, 2015

By GWS Environmental Contractors Inc.

Horizontal Remediation Wells - Case Study

Why wait 30 years…when HRWs are here today! After 30 years of remediation, the responsible party became frustrated with the limitations of vertical wells and the inability of methods used to achieve cleanup goals. Seeking site closure, the soon to be client, turned to Directional Technologies and Horizontal Remediation Wells (HRWs) to break the stalemate. The HRWs were engineered to ...

May 11, 2017

By Directional Technologies, Inc.

Thermally Enhanced Soil Vapor Extraction

Introduction Thermally enhanced SVE is a full-scale technology that uses electrical resistance/electromagnetic/fiber optic/radio frequency heating or hot-air/steam injection to increase the volatilization rate of semi-volatiles and facilitate extraction. Thermally enhanced SVE is normally a short- to medium-term technology. Electrical Resistance Heating Electrical resistance heating uses an ...

Jan. 1, 1997

By Federal Remediation Technologies Roundtable

Soil Vapor Extraction (Ex Situ)

Introduction: Ex situ soil vapor extraction (SVE) is a full-scale technology in which soil is excavated and placed over a network of aboveground piping to which a vacuum is applied to encourage volatilization of organics. Soil piles are generally covered with a geomembrane to prevent volatile emissions and to prevent the soil from becoming saturated by precipitation. The process includes a ...

Oct. 1, 1997

By Federal Remediation Technologies Roundtable

Time-Tested Advantages of Horizontal Wells

Wells are wells are wells, right? Both conventional vertical wells and directionally drilled horizontal wells have a screened casing that is connected to solid riser casing which leads to the ground surface. Groundwater or soil vapor is drawn through a well screen to remove contaminants. Remediation agents such as air, bioamendmnents or potassium permanganate are injected through a well screen to ...

Oct. 22, 2010

By Directional Technologies, Inc.

Refinery remediation: fuel recovery and recycling

Introduction The site is a former refinery that occupied approximately 64 acres of land in West Texas. Refinery operations produced all grades of gasoline, tractor fuels, diesel, distillate products, and fuel oils and operated between 1939 and 1954. As a result of past waste management practices, releases to soils and ultimately ground water occurred, resulting in the formation of a ...

Oct. 13, 2010

By GEO Environmental Remediation Company

LNAPL remediation using electrical resistance heating

Abstract An Electrical Resistance Heating (ERH) pilot test was conducted in the fall of 1998 to determine the effectiveness of using ERH in combination with soil vapor extraction (SVE) for the remediation of benzene and light nonaqueous-phase liquids (LNAPL) at an island location on a river in the Midwest. Hydrocarbon-stained soils were discovered on an island in Ohio in May 1993 during the ...

Oct. 31, 2014

By TRS Group, Inc.

Environmental Assessment Brownfield Study

In late 2011, Global was contracted by the Genesee County Land Bank and City of Flint to prepare an Environmental Assessment (EA) in accordance with guidelines set for by the U.S. Department of Housing and Urban Development (HUD) 24 CFR Part 58 for the Smith Village Project. Global utilized the HUD recommended format during the preparation of the EA including completion of the Statutory Checklist ...

Sep. 3, 2016

By Global Environmental Engineering

Proposed Standard Test Method for Measurement of Pneumatic Permeability of Partially Saturated Porous Materials by Flowing Air

This proposed standard describes a laboratory test method for the measurement of the coefficient of permeability for airflow (pneumatic permeability) through porous media (e.g., soils) partially saturated with water. Control and measurement of the airflow is effected at the inlet of the specimen. The permeameter cell is fitted with dual transfer lines that isolate the specimen pressure drop from ...

Jun. 1, 1996

By ASTM International

Horizontal Remediation Wells used in order to preserve military security

Project Description: Remediate a plume of trichloroethylene (TCE) under multiple military buildings by air sparging (AS) and soil vapor extraction (SVE). There are two target zones: the shallow zone is approximately 70' below grounds surface (bgs) and 20' below this is the deep zone. The plume was located under multiple buildings comprising an area of approximately 150,000 SF. Scope of Work: ...

Nov. 11, 2010

By Directional Technologies, Inc.

DTI installs horizontal remediation wells under busy intersection

The Issue A retail gasoline station in Tallahassee Florida with leaking underground storage tanks sits atop a local groundwater divide, causing petroleum hydrocarbon plumes to migrate in opposite directions from the site. In one direction, the plume has migrated under a residential neighborhood on downward sloping terrain, and in the opposite direction, the plume has migrated under a major ...

Oct. 22, 2010

By Directional Technologies, Inc.

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