Monitoring Programs and Management Plans

A Remedial Action Works Plan (RAWP) is to be prepared for the specific stages and or areas of the site to be remediated in order to develop robust remediation options to address the significant risk of harm, and to ensure that each part of the site is suitable for the proposed end use.  These reports are required to be submitted to the Site Auditor and DEC for approval prior to the commencement of works in that area.

The RAWP contains a Remediation Environmental Management Plan (EMP) that details the environmental management practices and procedures to be followed during remediation.  The EMP includes the following plans and monitoring programs:

• Air Quality Management Plan & Monitoring Program
• Contaminated Water Management Plan & Surface Water Monitoring Program
• Erosion & Sedimentation Protocol
• Noise & Vibration Management Plan & Monitoring Program
• Traffic & Transport Management Protocol
• Complaints Handling & Response Protocol

A Site-wide groundwater monitoring program is currently in place for the entire site, with sampling being undertaken on a quarterly basis.  These reports are also required to be submitted to the Site Auditor and DEC.  There are also two sets of groundwater pumps located on the western site boundary that intercept contaminated groundwater and prevent discharge from the site.  The collected water is treated in the on-site Effluent Treatment Plant before being discharged from site under licence.

Monitoring Results Summary

A summary of the monitoring results undertaken during remediation works to date is included below:

• Groundwater Monitoring to date indicates evidence of contamination across the site in unremediated areas and also that the contaminated water is being effectively captured by the boundary wells and is not having any off-site impact.
• The site has an existing weather station which is to be upgraded to record additional data during the remediation period.
• Cardiff West Estate (CWE)
  - Noise & Vibration monitoring undertaken during remediation works found that noise readings were generally within the acceptable limits and that there were no adverse vibration effects.  The work has been undertaken without causing any complaints from adjacent properties.
  - Analysis of Dust Data collected during the remediation works found that readings were within the acceptable limits.
  - Most of the groundwater in the CWE area has the same concentrations as in the background groundwater coming from Munibung Hill.  Planned monitoring after the completion of the remediation is expected to show large improvements in groundwater concentrations in areas that were previously filled with waste.

 Figure 1 shows a rolling average of ambient lead-in-air over a period of 19 moths from September 2003 to March 2007

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