Select Committee on Environment, Transport and Regional Affairs Sixth Report


SUSTAINABLE WASTE MANAGEMENT

Landfill

126. The burial of waste in landfill sites is by far the UK's most widely-used method of waste management. Making Waste Work estimated that about 120 million tonnes of controlled wastes are sent to landfill annually-about 70 per cent of the total of controlled wastes arising[244]-and the Minister told us that for household waste specifically, the figure is now 85 per cent.[245] Making Waste Work indicates that the majority of wastes can be disposed of to landfill, including:

  • inert wastes, which do not degrade (such as incinerator ash)
  • biodegradable wastes
  • limited amounts of aqueous liquids
  • sludges
  • certain special wastes (such as asbestos).

Wastes which cannot be landfilled include solvents and other special wastes which pose a particular risk to human or environmental health.[246] A description of how a landfill site works is provided in the visit report at Annex 2; we do not, therefore, explain the operation here.

127. The reasons why landfill has been popular, historically, have been the availability of land, the ease of disposal by this method and the perceived low cost of the option: whereas the pursuit of incineration or recycling requires considerable initial investment to build a facility, the initial cost of landfill may be simply the price of the land which is excavated. The continuing maintenance and staffing costs for landfill have also in the past appeared low by comparison with those of options higher in the hierarchy, although the Environmental Protection Act 1990 increased these costs through its requirement of continued monitoring after the closure of a site.

128. It is only in recent years that perceptions of landfill have begun to change. Greater Manchester Waste Disposal Authority told us that when it last looked to draw up a waste disposal contract in the 1980s, landfill was considered a perfectly acceptable option, although pressures on space were beginning to be felt.[247] Since then pressures on available land, particularly in rural areas close to cities, have increased considerably leading to a dedicated campaign on landfill by the Council for the Protection of Rural England.[248] Doubts have also been expressed about the ability of landfill sites to contain potential pollutants: as they decompose organic wastes produce methane, which is a more powerful 'greenhouse' gas than carbon dioxide; leachate (comprising rainfall and liquid in the wastes), if it is allowed to permeate the soil surrounding the site, can enter water courses with the potential to contaminate drinking water supplies and pollute ecosystems.[249]

129. The Government's target for landfill is for 60 per cent of controlled wastes to be landfilled by 2005; in other words, a reduction is sought of about a fifth in the current rate.[250] Two key policy instruments will be used in achieving this target: the European Landfill Directive, if implemented, and the Government's Landfill Tax; both will be discussed later, at paragraphs 136 and 142 respectively. However, the White Paper makes it clear that this target was not conceived out of specific concerns over the impacts of landfill, but through the Government's desire to reduce waste overall.[251] It is argued that, by making it more difficult and expensive simply to deposit waste in such sites, waste producers and managers will be forced to reconsider their strategies and exploit the other options in the hierarchy to greater effect.

130. Landfill is classed as a disposal option because, historically, no further use has been made of the materials put into the site: they have been buried and left to degrade often with little management of consequent emissions to soil, water or air. In recent years the technology has been developed to capture methane and convert it, by burning, into electricity;[252] new sites, which are subject to planning requirements, must also be located and constructed so as to pose the smallest risk possible to the environment. As an example, the UK Waste site at Risley near Manchester is based on naturally occurring, impermeable clay and the cells into which the waste is deposited are lined with a welded, flexible membrane liner to trap any liquids leaching out.[253]

131. A variety of witnesses including the Royal Town Planning Institute, the Onyx Environment Group and the Local Government Association saw a continuing purpose in landfill, quite simply because it is the ultimate disposal option: even incinerators produce ash which has to be put somewhere.[254] For some wastes it will be the Best Practicable Environmental Option.[255] English Nature, whilst looking for reductions in landfill usage, recognised that the subsequent restoration and maintenance of sites by landfill operators can have some value in creating new wildlife habitats and public amenity space.[256]

132. Curiously, perhaps, we received little evidence of concerns about landfill other than criticism of landfill management practices from within the waste industry itself. Although the Environmental Services Association claimed that it is possible to recover as much as 95 per cent of methane produced for electricity generation,[257] UK Waste stated that still only about one third of sites have a gas management system.[258] UK Waste also claimed that few landfills have any kind of containment system or lining, and the Composting Association told us that "even in the most sanitary landfills they only captured up to 70 per cent" of methane.[259] In the United States where UK Waste's parent company operates, landfill managers have been "stung very, very hard in the pocket" as a result of prosecutions for environmental liability and the company is concerned that similar cases might be brought in the UK in future if operators do not face up to their duty of care.[260]

133. During our inquiry into Housing we have also learned that previous, poorly-managed landfill sites have proved problematic as the degree of persistent soil contamination has made them difficult to develop after closure. It is very important that, in developing and managing current and future landfill sites, attention should be paid to the land's final use, and the likelihood of problems being presented for future generations should be avoided.

134. In spite of such concerns there appeared to be a general consensus that properly managed landfill is a reasonable option to be included in the hierarchy. Hampshire County Council told us that their public consultations had led specifically to the inclusion of landfill in their new integrated waste strategy.[261] A number suggested that it is a better option than incineration: the Geological Society and the British Geological Survey both argued that the slow decay rate of wastes in a landfill allows for a more controlled release of emissions such as carbon dioxide than is possible with incineration.[262] Mike Childs of Friends of the Earth concluded that landfill gives a "degree of flexibility".[263] Discussion about the disposal of hazardous wastes-while largely outside our remit-tended to assume that landfill can absorb many substances safely. The environmental campaign groups on the whole elected not to comment.

135. It would appear that the future use of landfill will depend largely upon pragmatic considerations of cost, availability and public acceptability. Landfill has always been a cheap option and remains so where land is available; from the evidence we received it would appear it does not so often provoke the vehement opposition which has been prompted by suggestions of incinerators. Even with the Landfill Tax the price of disposal to landfill is in the region of £18 per tonne[264] and its relative cost is indicated by the Local Government Association's statement that local authorities who are moving away from landfill in order to invest in waste processing and recycling facilities are "experiencing a rise on their waste budgets of six to seven hundred per cent."[265] It must be tempting for cash-strapped authorities to seek to retain the status quo, at least until such time as they run out of space or a greater balance is struck between the cost of disposal and the cost of recovery. David Boyd drew upon waste management practices in the Netherlands to provide an example of such a balance, perceiving a correlation there between high recycling rates and a price for disposal of £80-£90 per tonne.[266] This would seem to suggest that the Landfill Tax has a long way to go to provide an equivalent incentive.

The proposed Landfill Directive

136. A greater incentive to waste producers to move away from landfill, in the short term, is likely to be presented by the proposed EU Landfill Directive. A Committee in the House of Lords has been subjecting this proposal to close scrutiny and published its Report towards the end of our inquiry.[267] We have not duplicated its effort, and consider the matter only briefly.

137. The proposal suggests among other things that member states should reduce the quantity of biodegradable waste accepted for landfill and that only pre-treated wastes should be landfilled. For the UK, this would require a reduction in the quantity of biodegradable waste landfilled to 35 per cent of the 1995 level by 2020. The proposal also lays down strict conditions about the siting of landfills in relation to centres of population and water sources. If implemented, according to David Coleman of the LGA, local authorities and others "are not going to have a lot of choice" in the future about moving towards waste processing for waste streams such as household waste which contain a large proportion of organic matter.[268]

138. Onyx had a more specific concern that the Directive threatens to return landfill to the position of a simple disposal option without the benefit of energy recovery. This is because landfills only emit methane while organic wastes are degrading within them; once the waste is fully degraded gas production ceases. The threat of a reduction in the amount of biodegradable waste going to landfill has, David O'Connor suggested, deterred landfill operators from investing in energy recovery equipment which might become obsolete in a comparatively short time.[269] The company was also concerned that the requirements over siting in relation to water resources would make the establishment of new landfills very difficult in this country and that the private sector would be reluctant to accept responsibility for hazardous-waste-only sites.

139. Witnesses such as South West Water, the Food and Drink Federation and Haul Waste were worried that implementation of the Directive would lead to the use of incineration as a substitute, which they feared would add to global warming. Dr Kramer of DGXI rejected the substance of this concern;[270] similarly the Royal Commission on Environmental Pollution have concluded that energy from waste incineration results in a net reduction in contributions towards global warming when compared to landfill, or landfill with energy recovery.[271] Setting the specific concerns about global warming to one side, however, it still seems inevitable that in the short to medium term, given the capital expenditure required for investment in processing facilities and the instability of the market for recycled products, some increase in incineration will be consequent upon the Directive's implementation.

140. Having purposely left it to the Lords Committee to carry out detailed scrutiny we do not consider that we are in a position to make a strong recommendation on the proposal. However, we expect that the Government will represent the concerns we have heard in making its submissions to the European Commission on the proposed Landfill Directive. We do not believe that the possibility of landfill being the Best Practicable Environmental Option for certain wastes in certain situations, particularly in remote areas, should be ruled out without very careful consideration.

141. We accept that landfill has a role to play in future waste management as a disposal option, although wherever possible with the benefit of energy recovery. In making this statement we are aware of the potential problems associated with the option including landscape impacts, disamenity and ground- and surface-water contamination. We therefore recommend that all future landfills should be efficiently compacted, fully engineered and lined to ensure the capture of leachate and gas, and that the Environment Agency must place the strongest requirements on operators of existing landfills to ensure that their duty of care is complied with in full. We also recognise that in the near future sites appropriate for landfill will become scarce. We believe therefore that space which is available should be saved for the disposal of wastes for which landfill will continue to be the Best Practicable Environmental Option, until such time as those wastes have been eliminated.

The Landfill Tax

142. The Landfill Tax came into operation in October 1996. We were told that the former Government's intention in introducing it was, firstly, to ensure that "the full cost of the environmental implications of disposal were taken into account in the price" and secondly, "to seek to shift behaviour" away from disposal towards re-use and reprocessing.[272] On top of the 'gate fee' which waste owners must pay to landfill operators to deposit their waste in a site, the tax set a charge of £2 per tonne for inert wastes and £7 per tonne for 'active' wastes which by degrading will potentially release pollutants into the immediate environment. The landfill operator is charged with collecting the tax from the waste owner and passing it on to the Treasury. As an incentive to environmental improvement, the operator is allowed to pay up to 10 per cent of the tax into a special environmental trust fund and in return, will receive a proportionate rebate on National Insurance contributions for employees.[273]

143. The tax has only been in operation for eighteen months and it is therefore rather early to make definitive conclusions about its success or failure. Progress thus far has been marked by anecdotal reports of increased fly-tipping and the diversion of commercial wastes to exempted sites (such as agricultural land and golf courses) and into household dustbins as some have sought to avoid paying.[274] In so far as these reports indicate a problem for management by the Environment Agency, they are discussed further in the section beginning at paragraph 247. Difficulties have, however, also been posed for the management of wastes: the waste industry told us that much of the waste which has been diverted from landfill is construction waste such as soil and aggregate, which the industry uses for constructing landfill 'cells' and restoring sites after use.[275] We were pleased that the Government addressed this problem in the 1998 Financial Statement and Budget Report by granting an exemption to materials required for these purposes. Of rather more concern is that the diversion of wastes into exempt activities and sites enables them to "drop out of the control of licensing and the recording of data".[276] This would appear likely to aggravate the existing, significant, problems which the UK has in assessing its production of waste.

144. It seems that the tax has had its greatest impact upon the local authorities. As we shall discuss in greater detail later (see section beginning paragraph 207) these authorities have traditionally drawn up long term contracts for their waste disposal needs, for periods of between ten and twenty-five years. Those who, like Manchester City Council, last drew up a contract in the 1980s or early 1990s prior to development of the tax, may have made a long term commitment to landfill which cannot be escaped until the contract expires. In Manchester's case, the contract has seven years still to run.[277] It, and other authorities like it, is committed therefore not only to paying the tax but to paying the higher rate for the large part of their waste (from households, parks and gardens) which is classed as "active".

145. The requirement to pay is not in itself a bad thing: Colin Vaughan of Greater Manchester Waste Disposal Authority admitted frankly that the tax had provided a strong incentive to reconsider the local waste management strategy.[278] What has proved difficult is the inability of the authorities, because of capping, to pass the full cost of the tax back to the householders who are presenting increasing amounts of waste for disposal. Peter Fenton told us that:

    " ... local authorities are not polluters in their own right, they are collecting waste and dealing with it - there is a charge on domestic refuse ... but whilst local authorities operate in a capped environment, effectively for every £1 we pay in landfill tax it is a pound less to spend on education, social services ..."[279]

Ken Manton of the Local Government Association supported this claim.[280] At the same time as they are paying the tax, furthermore, local authorities are having to plan and invest in facilities which will enable them to move away from landfill in the future: Bob Lisney, also speaking for the LGA, described this as a "double whammy" which could last for up to ten years.[281] Since these groups gave evidence to our inquiry the Chancellor of the Exchequer has increased the rate of the tax for 'active' wastes from £7 to £10 per tonne, from April 1999.

146. Complaints have also been raised about the operation of the environmental trust funds. While the Environmental Services Association, representing the waste industry, described the scheme as "positive",[282] the March Consulting Group complained that operation of the trusts is dominated by the waste industry and Hampshire Waste Services suspected that the money raised thus far may have gone into projects benefiting public relations rather than the environment.[283] These concerns were reiterated by the community representatives whom we met in Liverpool. They told us that application forms for registration as environmental trusts are expressed in complex legal language, acting as a deterrent to small groups, and that money is being channelled into a few large organisations although community organisations may have a better idea as to what would provide genuine environmental benefit in the locality.[284]

147. Whilst voicing these specific complaints, most witnesses appeared to accept the principle of the tax, as they accepted the principle of landfill itself. In looking for improvement in the operation of the tax, most presented the same idea: that the tax should be subject to a 'price escalator' in the same way as road fuel duty. This would ensure the steady increase of the tax towards an upper threshold and, because the increase would be predictable, local authorities and others affected would be better able to plan to accommodate it or seek alternative management options.[285] We asked the Minister whether the Government would produce a long-term plan for the tax and he said this was "a matter for the Chancellor"; he added that the DETR is in negotiations with the Treasury concerning the use of additional Landfill Tax revenue for environmental projects and that he would particularly like to see money being granted to local authorities to encourage recycling.[286]

148. The Landfill Tax is the UK's first primarily environmental tax and we welcome it. However, we consider it to be essential that the Government states clearly its plans for the tax to the end of this Parliament, in order that waste holders may plan effectively for the future management of wastes arising. We are encouraged that the Minister has expressed a wish for Landfill Tax revenues to be used directly to fund recycling. This should become Government policy.


244  Making Waste Work Cm 3040, HMSO London 1995 p60 Back

245  Q853 Back

246  Op.cit., p 63 Back

247  Q592 Back

248  Ev p 221 Back

249  Q638 Back

250  Making Waste Work Cm 3040 HMSO London 1995 p60 Back

251  Op cit, p60 Back

252  Q207 Back

253  See Annex 2 Back

254  Ev p 18, Q639, Ev p 212 Back

255  QQ113, 116; Ev pp 11-12 Back

256  Ev p 17 Back

257  Ev p 97 Back

258  Q636 Back

259  QQ 636, 441 Back

260  Q638, Ev p 241 Back

261  Q523 Back

262  Ev not printed Back

263  Q287 Back

264  Ev p 61  Back

265  Q142 Back

266  Q645 Back

267  Sustainable Landfill, HL 83, 1997-98 Back

268  Q173 Back

269  Q644 Back

270  Q698 Back

271  Royal Commission on Environmental Pollution, Seventeenth Report, Cm 2181, London 1993 para 5.30 Back

272  Q43 Back

273  The Government's consultation paper Less waste more value indicates that up to 20 % of landfill tax funds may be channelled into environmental projects Back

274  See for example QQ 43, 209, 650; Ev pp 21, 63, 108 Back

275  Ev pp 21, 63, 108 Back

276  Ev p 114 Back

277  Q593 Back

278  Q601 Back

279  Q593 Back

280  Q159 Back

281  Q162 Back

282  Q654 Back

283  Ev not printed; Ev p 297 Back

284  See Annex 2 Back

285  Ev pp 34, 92, 97, 200, 268; Ev not printed Back

286  QQ893, 872 Back


 
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