| Title: |
Ex Situ Soil Vapour Extraction to Remediate Chlorinated Hydrocarbons: CL:AIRE Technology Demonstration Project 16 (TDP16)
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| Resource Type: |
document --> case study
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| Country: |
United Kingdom
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| Year: |
2007 |
| Availability: |
This report describes an assessment of the performance of ex situ Soil Vapour Extraction (SVE) in above ground treatment beds. It describes the health and safety risks of excavation and treatment of chlorinated hydrocarbon (mainly carbon tetrachloride and chloroform) contaminated soils and provides a discussion on air monitoring. The project assesses the feasibility and uncertainties of a mass balance on volatilisation losses during excavation and treatment, and demonstrates the difficulties associated with carrying out such an exercise. The project was completed in 6 months and achieved its contracted targets.
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| Author 1/Producer: |
Noble, P., Croft, R., French, C., Forster, S.
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| Other Authors/Producers: |
CL:AIRE
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| Author / Producer Type: |
Professional / trade / industry associations, institutes or networks
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| Publisher: |
CL:AIRE
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| Publisher City: |
1 Great Cumberland Place, London, W1H 7AL
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| ISBN: |
ISBN 1-905046-11-1
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| Report / download web link (=direct link): |
http://www.claire.co.uk/technology_pub.php
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| Format (e.g. PDF): |
HTML
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EUGRIS Keyword(s): |
Contaminated land-->Contaminants-->BTEX
Contaminated land-->Contaminants-->Contaminants overview
Contaminated land-->Contaminants-->PAH
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| Short description: |
This report describes an assessment of the performance of ex situ Soil Vapour Extraction (SVE) in above ground treatment beds. It describes the health and safety risks of excavation and treatment of chlorinated hydrocarbon (mainly carbon tetrachloride and chloroform) contaminated soils and provides a discussion on air monitoring.
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| Long description: |
Previous chemicals manufacture has resulted in the presence of carbon tetrachloride (CTC) and chloroform in soil/shallow groundwater at the site. The potential for contaminant migration towards a nearby stream was identified and the site owner decided to implement a remedial programme. Soil vapour extraction (SVE) was considered to be a viable option for CTC removal and a pilot trial for in situ SVE was carried out. The trial indicated that SVE could be successful, but that the ground conditions were not conducive to in situ treatment and an ex situ scheme was developed. Clean-up criteria were developed in order to protect surface waters and render the site suitable for industrial development.
The project aims to assess the performance of ex-situ soil vapour extraction in above ground treatment beds; to monitor and model the volatile losses to the atmosphere during the remediation in an attempt to carry out a contaminant mass balance; and to assess the health and safety risks of excavation and piling of chlorinated hydrocarbon contaminated soils.
The main benefits of the project are as follows:
Cost-effective remediation when compared to landfill option.
Reduction in amount of waste transported off-site for disposal i.e. this method is considered to be the best practicable environmental option in the context of the project aim.
Ex situ option should ensure that contamination in awkward areas (e.g. within redundant process drains, clay pockets, former concrete structures, etc.) is treated.
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Submitted By:
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Mr John Henstock WhoDoesWhat?
Last update: 16/08/2007
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