This request and release is about high TPH in the garden of a residential site.
Response date
18 November 2020
Type
Departmental
This request and release is about high TPH in the garden of a residential site.
Response date
18 November 2020
Type
Departmental
Details of the request
1. What is the usual baseline concentration of TPH in NZ residential soils?
2. What are the maximum permitted limits of C7-C9, C10-C14, C15-C36 and TPH in the soil for NZ residential sites?
3. What is the maximum safe dose of these components if ingested by a child, over a 24 hour period and over a period of a month or a year?
4. How can I dispose of the contaminated soil and how much would this cost?