Hampshire, Portsmouth and Southampton

Minerals and Waste Local Plan:
Adopted December 1998

Need for Waste Facilities

Main Contents Page

Need for Waste Facilities

Clinical Waste

6. Meeting the Need for Waste Management

Non-Inert Waste Scenarios

Scrapyards

General Considerations

Inert Waste Scenarios

Waste Water (Sewage) and Sewage Sludge

Waste Arisings

Landfilling and Landraising

Ancillary Waste Development

Waste Minimisation and Recycling

Waste Processing

 

Resource Recovery

Difficult and Special Waste

 

6.33 In the preparation of this Plan, the Councils have developed a range of scenarios to assess the County's waste disposal requirements over the period to 2001. The scenarios are based on the SERPLAN model used to predict the South East Region's waste disposal requirements to 2005, as set out in the regional waste planning advice RPC 2700. However for the purposes of this Plan, the SERPLAN model has been refined to reflect assumptions specific to Hampshire.

6.34 The average annual arisings of Category A and B wastes over the period 1987/1993 were 1,701,000 tonnes and 327,000 tonnes respectively (source: SERPLAN and SEWRAC waste monitoring surveys). For the purposes of projecting waste arisings, rather than using the estimated average arisings figure for Category C waste derived from the SERPLAN and SEWRAC waste monitoring surveys, a more accurate arisings figure has been substituted. Based on weighings data from the first full year of the Waste Disposal Authority's waste disposal contracts with the private sector, for the period 1 April 1994 to 31 March 1995, Category C waste arisings totalled 733,658 tonnes (source: Hampshire County Council).

6.35 Projections of Category C waste arisings to the end of 2001 are calculated on the assumption that a correlation exists between arisings and population size and change. An average per capita arising figure for the period 1994 to 1995 has been applied to yearly County Structure Plan population projections to calculate future annual arisings. Whilst it is acknowledged that Category A and B waste arisings will be affected by changes in economic activity, it is not possible to quantify such effects accurately. Therefore, for the purposes of this Plan, in line with SERPLAN guidance, it is assumed that future arisings in these categories will be a simple extrapolation of the average arisings figures for the period 1987-93. On this basis, the expected waste arisings in Hampshire over the period April 1993 to December 2001 are as shown in Table 5.

6.36 The County's estimated void space at permitted landfill and landraising sites at 1 April 1993 is set out in the SEWRAC 1993 waste monitoring survey (RAC 161R), March 1994. The estimates in Table 6 represent an update of these figures taking account of changes in the status of sites since 1 April 1993, sites omitted from the survey and new permissions granted in the period to 1 April 1995.

6.37 The permitted void space figures set out in Table 6 relate to gross void space. An allowance must be made for the import of inert wastes to non-inert landfill sites for use as cover, and in restoration, site roads and engineering works (lining and capping). In order to estimate 'usable' void space at non-inert sites, an analysis of the County Council's landfill voids and inputs survey (1992/93) was undertaken. It was found that on average 29% of gross void space at non-inert landfill sites was taken up with inert waste. In the absense of a more accurate assessment, it is assumed for the purposes of this Plan that usable void space at non-inert landfill sites is 71% of gross void space. To reflect this assumption, the permitted void space totals in Table 6 must be revised accordingly. The revised totals set out in Table 7 incorporate a 29% reduction in gross non-inert void space to calculate usable non-inert void space. As it is assumed that this 29% of void space will be filled with inert wastes, total inert void space is increased accordingly. The figures in Table 7 are used below in the four scenarios which assess the need for further landfill provision over the Plan period.

6.38 The results of the 1995 SEWRAC waste monitoring survey were published in February 1996 (RAC 300). Based on the site information used in that survey, the total void space remaining at sites with planning permission for landfilling of waste as at 1 April 1995 was: inert waste sites - 11,753,000 cubic metres; non-inert waste sites - 8,589,000 cubic metres; total - 20,342,000 cubic metres. Assuming that 29% of gross void space at non-inert landfill sites is taken up with inert waste, these figures are revised to: inert waste sites - 14,244,000 cubic metres; non-inert waste sites - 6,098,000 cubic metres. However, not all of this void space will be available during the Plan period (i.e. to the end of 2001). An assessment of void space availability over the plan period has therefore been undertaken on a site-by-site basis for all sites suitable for landfilling of non-inert waste. It is estimated that the 'usable' non-inert void space at 1 April 1995 that will be available for landfilling during the Plan period is thus reduced to approximately 4,468,000 cubic metres.

6.39 With the exception of the sites at Efford (Lymington), Ridge Farm (Romsey) and Lode Farm (Kingsley), the existing non-inert waste landfill sites in the County are expected to be full before the end of the Plan period. Of these, only Efford takes household (category C) waste, the other two taking commercial and industrial (category B) waste. The Councils believe that the old household waste incinerators and the current landfilling of household waste should be replaced by integrated systems which include recycling, resource recovery processes and final disposal of residues by landfilling. However, taking into account the closure of the old incinerators in November 1996, and the lead-in time for letting new contracts and for designing, gaining planning and other necessary approvals for and constructing new plants, there may be a gap of up to three years between the old incinerators closing and new facilities being commissioned. It is therefore necessary to assume that all household waste that is not recycled would have to be disposed of by landfilling in the years 1997/98/99. When new resource recovery waste processing facilities do become available, it will still be necessary to dispose of the process residues, together with any materials not suitable for processing (i.e. some amenity wastes), by landfilling. The Councils believe that in the long term all suitable commercial and industrial waste should also be processed through resource recovery plants. However, within the Plan period it is likely that only that fraction of commercial waste collected by the Waste Collection Authorities will be treated in this way. The bulk of commercial and industrial waste will continue to require disposal by landfilling.



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