Client: Various developers and private landowners, Auckland Council
Thomas Services: Contaminated site testing, preliminary site inspection, detailed site investigation, remediation action plans, site remediation, site validation, on-going monitoring and management, specialist review of contaminated site reports on behalf of Council.
Year: 2012 – ongoing
Much of West Auckland and many parts of the greater Auckland area were formerly market gardens, vineyards and orchards prior to the major residential developments post 1975. Various sprays including pesticides containing DDT and lead arsenate were utilised to control un-wanted pests within horticultural sites. Many of the pesticides used are persistent within the soil which means they do not break down easily or degrade very quickly over time. These contaminants often exist within the soil today at levels in excess of what is considered safe for human health. Thomas Consultants have been involved in numerous contaminated site investigations of former horticultural sites from preliminary investigations right through to remediation.