Remediation of Contaminated Land & Groundwater

Groundwater Remediation for Bord Gais Headquarters, Cork

The Challenge

Contaminated perched groundwater was providing hindrance to site remediation and development works at Board Gais’s new corporate head quarters in Cork. Large flow rates were required to effectively de-water excavations on the 5 acre site. Mixed contamination typical of coal gas works were present including cyanide, heavy metals, phytotoxic metals, BTEX compounds and PAH’s. The development programme was in doubt.

The Solution

Contaminated groundwater pumped to 2 no 15,000 litre settlement tanks. Water passed through an automated multi stage treatment system, including an oil water separator, sand and carbon filters.
Treated water discharged to sewer under discharge consent, agreed with the EPA. Initial discharge rates of 100m3 per 24 hours, were increased to 500m3 per 24 hours once effective treatment was demonstrated to the EPA. The system ran 24 hours per day, 7 days per week for a period of 9 months.

The Benefits

Benefit 1

EPA

All limits set by the EPA under the discharge consent were met and ground water contamination cleaned up to EPA agreed limits.

Benefit 2

Daily records

Daily records of discharged volumes submitted to the client with 136,500 m3 treated.

Benefit 3

Programme set

Development works continued according to the initial programme set.

Similar Case Studies

Case Study

Remediation of Contaminated Land & Groundwater

Unlicensed Landfill Site

A group of housing developers have purchased land south of the village of Comber with the vision of building 900 houses. To the south of the site is an unlicensed landfill site…

Read More

Case Study

Remediation of Contaminated Land & Groundwater

Treatment Cell and Remediation

A century of shipbuilding and maintenance had left a legacy of ground contamination at this 9.3 hectare site. The total volume of soil that required remediation was…

Read More