Victoria Ave Subdivision Contamination

Subdivision for redevelopment of a site can trigger the National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health (NESCS). If a piece of land has been subject to a Hazardous Activities and Industries List (HAIL) activity, then a consent under the NESCS will also be required for redevelopment.

Fraser Thomas Ltd undertook a preliminary site investigation (PSI) for a residential site in Papatoetoe, required as part of the resource consent application process for residential subdivision of the site. This investigation involved a desktop study, site walkover and reporting associated with potential land contamination issues.

The house on site dated from 1941, and a large garage with a sleep-out and workshop were added some decades later.  According to the original plans on the property file, the house had originally been roofed with Super 6 fibrolite, which is an Asbestos Containing Material (ACM). Asbestos was commonly used in New Zealand buildings up until the 1990s due to its insulating and fire resistance properties.

Under Regulation 5 (7) of the National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health (NESCS), Hazardous Activities and Industries List (HAIL) code E1 for asbestos use potentially applied to the site: “Asbestos products manufacture or disposal including sites with buildings containing asbestos products known to be in a deteriorated condition”.

For this project, Auckland Council also requested that a Building Asbestos Survey be carried out to identify any other ACMs.  This was done, including laboratory testing for formal ACM identification, with a number of other ACMs identified.

It was recommended that all asbestos removal works shall be undertaken by a professional asbestos removal company in accordance with the New Zealand Guidelines for the Management and Removal of Asbestos (3rd edition) (March 2011). All materials confirmed to be ACM (or any potential ACM not tested) shall be removed and disposed of to an approved landfill. Disposal receipts should be retained for a letter validation report to be provided to Council and Worksafe NZ documenting the removal process, which Fraser Thomas Ltd can prepare.

Expertise provided:

  • Contaminated land
  • Asbestos surveys

Project cycle:

  • Preliminary site investigations
  • Detailed site investigations
  • Risk assessments
  • Management Plans
  • Remedial Action Plans
  • Site validation reporting