CEMP - NZ Transport Agency

NZ Transport Agency
CSM2 & MSRFL
However measures to be considered include bunding or metalling surface storage areas, providing
spill response procedures, spill kits and factors such as no refuelling within 50 metres of any
watercourses including stockwater races. Even though the storage of hazardous substances will be
low in volume the NZTA is seeking consent for the use and storage of hazardous substances due to
the PLWP limitation of 2000 litres stored at any one time. In any event management of any
hazardous substances and the avoidance of any spills will be a matter of good practice.
CEMP Expectations for the appointed Principal Contractor
A GCS Hazardous Substances and Spillage Response Plan should be developed once a detailed
construction programme and build methodology has been agreed with the NZTA by the Principal
Contractor and the Construction Environmental Manager.
2.3.11 Soil Contamination Discovery
Potential Impacts
Soil Contamination investigations have been undertaken along and adjacent to the proposed CSM2
and MSRFL alignment. The results of this investigation conclude that contaminants do not exceed
relevant standards (see Technical Report 16 and Chapter 22 of the AEE). Remedial action resulting
from soil contaminant concentrations is therefore not required.
Even though a soil contamination assessment has been completed for the alignment, it is possible
that unexpected contamination is encountered during the construction phase of the project, and
this soil will need to be managed in an appropriate manner.
Project-Specific Issues and Requirements
An outline of recommended steps to be taken if contaminated soil is discovered during the
construction phase is provided below. Actual contingency action will be site specific and dependant
on the extent and nature of the discovered contamination.
Contaminant indicators in soil may include:
• Visual (buried refuse, metal objects, building material, soil or water staining/bleaching or
discolouration),
• Olfactory (fuel, sulphurous, rotting vegetation or sewage)
• Auditory (gas leaks, flowing or dripping liquid).
• Fibrous cement based board materials may contain asbestos.
If any such indicator is observed during earthworks, the following steps should be taken:
• Cease all work within a 20 m radius and make the work safe;
• If possible contain any contaminant dispersion and shut off/divert any water flow; and
• Advise the Site Manager
The construction manager shall assess the site. If the assessment concludes that confirmation of
contamination is required, the Site Manager shall:
Draft 34 CEMP