Services

Tasman_Richmond Recyling Centre (2)Solid Waste Analysis Protocol (SWAP) and Waste Audit Services

Our MWH consultants have a strong track record in the area of SWAP studies, and have also been involved in reviewing and updating key guidance documentation for the New Zealand government.

Here you will find more information about our work including:

 

Project: SWAP Guidance Document – review and update

Client: Ministry for the Environment

In 2012, MWH was engaged to update the 2002 SWAP procedures. This included a review and update of the previous guidance document, and new material to guide users in survey regimes and design of individual surveys. Key areas of focus were refining the procedures of visual assessments and sort-and-weigh. MWH led the project, and worked closely with the Ministry staff to provide a proposed update and present this at the WasteMinz Conference.

Key Staff: Peter White, Kathryn Halder


Project: SWAP Guidance Document – major rewrite

Client: Ministry for the Environment

MWH was engaged to undertake a major rewrite of the SWAP procedures. This included review and update of the previous guidance document, and new material to guide users in survey regimes and design of individual surveys. Balancing the needs of the Ministry to achieve rigorous and consistent data across the country, while encouraging users to undertake surveys using a simple methodology was a key challenge. Key areas of focus were on sampling frequency, sample size, and the merits of visual assessments as an alternative to the more expensive sample-and-weigh procedure. MWH led the project, and brought together a team that included TLA waste operators. The Ministry staff were incorporated in the review team.

Key Staff: Peter White, John Cocks

 

 

SWAP Studies

The MWH team has hands-on experience in carrying out SWAP surveys.  We understand the practical considerations around sampling, sorting and weighing procedures and the time and effort needed to rigorously sort through waste material.

 

Nelson Tasman SWAP study (2012)

Client: Nelson City Council and Tasman District Council

In 2012, MWH was appointed by Nelson City Council and Tasman District Council to undertake a number of SWAP studies at the landfill and RRC’s in the Region. This project was part of a larger project partially funded by the Waste Minimisation Fund and involved a one week study at three different sites. MWH designed a sampling plan that enabled representative waste samples of the different sources of material to be taken. Procedure Two of the Ministry SWAP methodology was used and samples from the various facilities were sorted and weighed into 20 different categories. The surveys involved obtaining records of all waste disposed of at the facility during the survey periods and sorting and weighing samples. This study will be used as the reference point for further waste planning decisions, determining the biodegradable waste fraction of the waste going to landfill, and the obligations for each Council under the New Zealand Emissions Trading Scheme.

Key Staff: Kathryn Halder


TasmanTasman SWAP Study (2007)

Client: Tasman District Council

In 2007, MWH was appointed by Tasman District Council to undertake a waste composition analysis of kerbside collection material being disposed of at the Richmond RRC. This survey included both sort and weigh methodology and visual assessments. MWH undertook all aspects of the SWAP surveys including training of local labour in the sort and weigh methodology, and inductions on health and safety matters relevant to the surveys. MWH also prepared a sampling plan that enabled representative waste samples of all types of waste entering the site to be taken. The weight of vehicle loads entering the site was recorded and a sample of a proportion of each load taken and segregated into 20 categories as part of this project. Statistical analysis and reporting was important as the surveys involved obtaining records of all waste disposed of at the facility during the survey periods; and sorting and weighing of samples.

Key Staff: Kathryn Halder


PNCWaste Audit, Palmerston North Council Facilities

Client: Palmerston North City Council

In 2009, MWH undertook two solid waste audits of numerous Council facilities, three months apart. Approximately 60 different facilities were identified, ranging from offices, libraries and a convention centre to cemeteries, parks, reserves, recreational sporting facilities, recycling facilities and even street bins. Council facilities were grouped into 21 main categories, grouping facilities that have similar waste disposal systems and so enabling an appropriate sampling methodology to be devised.

The intention of the audit was to ascertain the approximate composition of solid waste generated at Council facilities by functions carried out by Council. It did not include an assessment of waste brought to Council’s transfer station by the general public, however waste generated within the office of the transfer station by Council staff in the course of their work was included in the study. The waste audit was required as part of a commitment that Council has made to Communities for Climate Protection – NZ. It is understood that the results of the waste audit were to be used to determine the extent of greenhouse gas emissions for which Council are responsible. MWH designed a sampling plan that enabled representative waste samples of all the facilities to be taken.

In general, Procedure Two of the Ministry SWAP methodology was used and samples from the various facilities were sorted and weighed into thirteen different categories. Researchers obtained records of all waste disposed of throughout Council facilities during the survey periods; estimated waste quantities for different facilities where the weight of waste was not recorded (e.g. litter bins at sports fields); arranged for samples to be provided, and collected samples from certain facilities; sorted and weighed samples; and statistical analysis and reporting.

Key Staff: Phil Landmark