This project involved geotechnical, civil and environmental assessments, then detailed design for a supermarket with large basement car park and separate tenancies.
We carried out geotechnical and contaminated site investigations and wastewater review assessment. Our detailed civil design included rainwater tanks, supplemented by a bore supply for the non-reticulated site.
Large underground tanks were required to store potable water, sprinkler tanks and fire fighting (total volume 350m3). With no public wastewater reticulation, we also completed detailed design and consenting of an on-site wastewater system.
Other work included:
engineering support for a resource consent application
attendance at the subsequent council hearing
assistance with tendering and negotiation with the contractor
observations and support during construction and commissioning.
The final design was a bespoke and all-encompassing three waters solution for the first non-reticulated supermarket of this scale in New Zealand.
Water was supplied via rainwater harvesting and groundwater bore supply (including appropriate treatment before consumption) to provide potable use as well as the required fire-fighting and sprinkler requirements.
The wastewater system can service this supermarket with only minimal adjustment to the standard operating procedures of the business. It discharges to an attractive landscaped garden with native low-level planting and water-tolerant vegetation on the rear of the site.