soil vapor extraction system Articles

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.

Industrial facility with chlorinated solvents

Project Description The project site is an Industrial facility located in the foothills of northern Los Angeles, California. The facility utilized chlorinated solvents in operations. Site Geology Based on soil borings site geology consisted of unconsolidated gravely sands, sand, silty sand, sandy silt, and silt from ground surface to more than 200 feet below ground surface (bgs). Groundwater was ...

Oct. 13, 2010

By GEO Environmental Remediation Company

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.

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

Texas Superfund Case Study

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 dissolved-phase benzene ...

Oct. 29, 2014

By GEO Environmental Remediation Company

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

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

Analytical model for uni–directional flow passive soil vapour extraction system

An analytical one–dimensional model has been developed to examine the uni–directional barometric pumping in passive Soil Vapour Extraction (SVE) system. The model is applicable to a special case in which a radial flow field is insignificant. The system considered contains two unsaturated zone layers, an upper contaminated low permeability layer and a lower high permeability layer contains a well ...

Oct. 17, 2012

By Inderscience Publishers

VC2 Vertebrae AS/SVE under highway - Case Study

SITE Active Fueling Station and Farm Store, Greeley Colorado CONTAMINATION Diesel and Gasoline range organics including LNAPL. The LNAPL plume is approximately 20,000 square feet. The dissolved-phase plume, above RBSLs, is approximately 40,000 square feet. OBJECTIVE The design involved 5 VertebraeTM well systems to provide targeted air sparging (AS) utilizing 29 independent well segments and ...

Oct. 11, 2019

By EN Rx, Inc.

Soil and groundwater remediation

At a site in northern Indiana on behalf of a multinational client, Troy Risk operated a groundwater remediation system to cleanup the source of chlorinated solvent impact to a groundwater aquifer system. Prior to 1988, the site was occupied by a manufacturing facility. In March 1995, chlorinated volatile compounds (CVOCs) were detected pursuant to due diligence for real estate refinancing. From ...

Sep. 22, 2012

By Troy Risk, Inc.

Andover, Vapor Extraction and Refrigerated Condensation Case study

Vapor Extraction and Refrigerated Condensation was used as a primary source removal technology to remediate high concentrations of recalcitrant chlorinated solvent compounds at the WDE Site in Minnesota. The use of Refrigerated Condensation has achieved high mass removal rates and will reduce the lifecycle costs and time of remediation. History 6,600 drums of hazardous wastes were placed in a ...

May 13, 2014

By In-Situ Oxidative Technologies, Inc (ISOTEC) - Soil & Groundwater Remediation

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

Directional Technologies Down Under

Directional Technologies, Inc. expands international experience with installation of horizontal remediation wells in Australia. By: Kyle Carlton, PG, Senior Geologist During the summer of 2017, Directional Technologies, Inc. was provided with the unique opportunity to partner with several Australian and American companies to successfully design and install horizontal remediation wells (HRWs) in ...

Jan. 10, 2018

By Directional Technologies, Inc.

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.

Case study – benzene contamination retail gas station, Colorado

Introduction The scope of work for this site included an expansion of an existing soil venting system to remediate impacted soil and injection of a carbon-based petroleum degrading product to remediate long-term groundwater impacts. By using a combination of remediation technologies, including LT Environmental’s (LTE) TerraCert™ program, the overall goal of a cost effective cleanup ...

Dec. 7, 2010

By Remediation Products Incorporated (RPI)

Off-Gas Treatment Technologies for Soil Vapor Extraction Systems: State of the Practice

Untitled Document EXECUTIVE SUMMARY This document provides state-of-the-practice information on off-gas treatment technologies for soil vapor extraction (SVE) systems currently being used to clean up hazardous waste sites. It provides information on a wide variety of processes, including common practices as well as innovative emerging alternatives to illustrate the state ...

Jun. 1, 2006

By US EPA - Environmental Protection Agency

EPA Technology News & Trends - Tacoma “Well 12A” Superfund Site

The U.S. EPA Region 10 office uses an adaptive site management approach that relies on high-resolution site characterization (HRSC) techniques for strategic sampling at the Well 12A project area. This approximate one-square-mile project area is one of three at the 2.5-square-mile Commencement Bay-South Tacoma Channel Superfund site in Tacoma, Washington. The vicinity of Well 12A, one of 13 wells ...

Jan. 15, 2016

By TRS Group, Inc.

Soil and Groundwater Clean-up

CLIENT: Homeowner/Insurance Company LOCATION: Hopatcong, NJ PROJECT TYPE: Soil and Groundwater Clean-up PROJECT DESCRIPTION: Brennan Environmental, Inc. was retained jointly by a homeowner and their insurance company to complete a soil and groundwater clean-up. An aboveground heating oil tank burst in the basement of their home, spilling approximately 200 gallons of oil onto the floor of the ...

May 20, 2015

By Brennan Environmental, INC.

Chloroflourocarbon (CFC) remediation case study

Project Description The Site location was an industrial facility located in the greater South Los Angeles region that manufactured chemicals for local petrochemical and other industrial operations from 1919 through late 1990’s. Refrigerants were initially produced in 1964 including chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) such as trichlorofluoromethane (R-11), ...

Oct. 13, 2010

By GEO Environmental Remediation Company

Air Sparging - Technology Overview

Air sparging involves injecting a gas (usually air/oxygen) under pressure into the saturated zone to volatilize groundwater contaminants and to promote biodegradation in saturated and unsaturated soils by increasing subsurface oxygen concentrations. Vola tilized vapors migrate into the vadose zone where they are extracted via vacuum, generally by a soil vapor extraction system. The term ...

Jan. 1, 1996

By Groundwater Remediation Technologies Analysis Center