Difference between revisions of "The Akacievej field site"
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== The field site: Akacievej, Hedehusene == | == The field site: Akacievej, Hedehusene == | ||
| − | + | At the Akacievej site, a dry cleaning facility was operating in the period 1973-2003. In 2002, the site was screened for contamination. | |
| − | + | This revealed high concentrations of PCE and TCE in the pore air close to where a dry cleaning facility operated in the years between 1973 and 1975. | |
| − | + | Most of the contamination is likely to be from the operation of the dry cleaning facility and a release during a fire at the site in 1975. | |
| − | + | The contamination was evaluated to pose a potential risk for the drinking water extraction at the Fløng waterworks, which has its closest extraction well about 600 meters north of the Akacievej site. | |
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| − | * | + | In 2007, the most contaminated soil containing PCE as DNAPL was removed and extensive remedial activities were started. |
| + | The goal of the remedial activities was to remove the hotspot and to achieve hydraulic control of the groundwater contamination. | ||
| + | The following actions were taken: | ||
| + | * Removal of contaminated soil in the source area 0-6 m bgs. Local excavation down to the limestone surface at about 8 m bgs. (limestone is found below ca. 7.5 m bgs.) | ||
| + | * Establishment of venting pipes and a drainage pipe | ||
| + | * Remedial pumping with 2.5 m3/h from the upper 6 meters of the limestone to establish hydraulic control | ||
| + | * Activated carbon filtering of the pumped water and reinfiltration of the purified water through infiltration cassettes with an overflow connected to a deep borehole | ||
[[File:PlumeExtent2006-2015.png|thumb|left|600px| Extent of contaminant plume in 2006 and 2015 and location of remediation system.]] | [[File:PlumeExtent2006-2015.png|thumb|left|600px| Extent of contaminant plume in 2006 and 2015 and location of remediation system.]] | ||
Revision as of 12:31, 9 February 2017
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The field site: Akacievej, HedehuseneAt the Akacievej site, a dry cleaning facility was operating in the period 1973-2003. In 2002, the site was screened for contamination. This revealed high concentrations of PCE and TCE in the pore air close to where a dry cleaning facility operated in the years between 1973 and 1975. Most of the contamination is likely to be from the operation of the dry cleaning facility and a release during a fire at the site in 1975. The contamination was evaluated to pose a potential risk for the drinking water extraction at the Fløng waterworks, which has its closest extraction well about 600 meters north of the Akacievej site. In 2007, the most contaminated soil containing PCE as DNAPL was removed and extensive remedial activities were started. The goal of the remedial activities was to remove the hotspot and to achieve hydraulic control of the groundwater contamination. The following actions were taken:
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