INFRASTRUCTURE PRELIMINARY PROJECTS - Xai-Xai IDP
From a hydrogeological point of view it is relatively high and away from the sources of water. All the soil is sandy so pollution of ground water will take place. It is, however, already being used at present so pollution would continue to be limited to one area.
There is a limited amount of space available, but it is hard to determine its volume without an accurate survey and with uncertain rate of growth. In the longer term they will have to use another site or the site at Xai-Xai. This site is 14 km away (28 km return trip) which is not economical for a tractor and trailer as it is too far.
A suitable cut and cover site could be established close to the town but where future development is not envisaged. This can be developed as a properly managed landfill site in accordance with both national and international standards.
Septic and Vacuum Tanker Effluent
Such a site may also be developed to accept sewage sludge or septic tank effluent should this become necessary in the future. Such a site should be situated on higher ground well above the water table and a kilometre away from dwelling houses and carefully designed and monitored to minimise danger of pollution.
Existing plant (truck/tractor & trailer) and labour should be sufficient to collect and cover using the present site. Provided land is free, development of a new site entails mainly building an access road using existing resources with cut and cover using hand labour initially. Therefore, capital costs are minimised.
Guidelines for Execution
It is, therefore, proposed in the short term that the existing quarry site continues to be used, but that waste material should be covered even if done by hand with wheelbarrow and spade;
People should be discouraged from dumping in the street by increased frequency of collection; and
Within the next five years consideration should be given to developing the new site described above.