Environmental Engineering Projects

Multi-storey Car Park and Commercial Tenancy

FredThomas crop
Engineering assessment of a closed refuse landfill to identify and address environmental geotechnical, and civil issues for a four-storey car park building incorporating a ground floor commercial tenancy.  The staged detailed site-specific investigation and gas risk assessment supplemented a desktop assessment and provided factual and interpretative environmental, geotechnical, and civil information for the design, construction, and operation of the proposed development to support resource consent, building consent, and various engineering approvals. Specific design included gas and contaminated stormwater runoff management measures and inputs to driven steel pile design.

Wattle Farm Stormwater Detention Pond

WattleFarm crop
Investigation into the nature of contaminants in accumulated pond sediment and provision of options for treatment and disposal.

Summerset Retirement Village, Ellerslie

Ellerslie Aerial-525
Pre-purchase due diligence environmental and geotechnical investigations, and civil assessment and design for a high density retirement complex consisting of villas, townhouses, apartments, and a care facility, plus associated structures.  The 3.9ha brownfield site in Ellerslie, Auckland, has previously been used as a quarry, a zoo, and a St John training centre.  The site is underlain by up to 20m depth of basalt lava with a variable surface cover of fill, lava caves, and scoriacous pockets, all of which have the potential to complicate founding requirements.  Subsequent to purchase, work has involved further geotechnical investigation, resource consenting, building consent applications, detailed design, contract management, and construction supervision.  The development includes a major retaining wall structure 250m long and up to 5.7m high, for which RILEY undertook the geotechnical aspects of the design.  The project is due for completion in 2019.

Petrol Station Redevelopment

PetrolStation 400
Combined environmental and geotechnical investigation for the redevelopment of a former petrol station site.

Bus Depot, Mount Roskill

Bus Wash crop
Development of a satellite bus depot within the KiwiRail easement adjacent to SH20 and within areas of historical non-certified fill.  The site contains office amenities, staff car parking, and 45 bus parks.  Geotechnical investigations identified highly variable subsurface conditions, including basalt cobbles, silt, building rubble, and organic debris.  Civil engineering aspects involved a detailed earthworks assessment to improve site contours and satisfy layout requirements; construction of reticulation including stormwater, wastewater, water supply, telecommunications, and power; and soft pavement design.  Observations during construction were undertaken for founding conditions, a bus store platform, and underlying fill compaction.

Horticultural Redevelopment

WaiauPa crop
Investigation and preparation of environmental reports for the redevelopment of various parcels of rural horticultural land to residential lifestyle blocks.  Work includes pesticide and herbicide contamination assessments, carried out using both targeted ‘hot spot’ and systematic sampling methods.

Pre-purchase Due Diligence

DueDiligence crop
A pre-purchase due diligence industrial site assessment including environmental review.  Due to the nature of the site, a groundwater monitoring round was undertaken which confirmed the presence of contamination.  Recommendations were provided to the client.

Victoria Park Market

VictoriaPark crop
Project management of an environmental site investigation including groundwater monitoring, soil and groundwater contamination assessments, preparation of documentation and Remediation Action Plan for resource consent and providing ongoing environmental technical input and support.

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