SITE PREPARATION
designed with a non-return valve that prevents any back flow. A number of different types of package treatment plant are available. The ones with complicated mechanical and electrical components are becoming less popular and aeration of the sewage with a small air blower is now commonplace.
friendly option.
If no watercourse is available, the treated effluent still needs to be discharged into a system of soakaway trenches. The use of a treatment plant may overcome the difficulties of a high water table, underground water supply areas or sites of special
scientific sensitivity.
To overcome a high water table or discharge into a watercourse that may flood, it can also be necessary to use an automatic effluent pumping system that manufacturers supply with their treatment plants, normally as an optional extra. These systems are
Some of the aerated systems still have a septic settlement stage that poses the risk of odours and the need for emptying once or more times per year. The better systems aerate all the sewage that comes into them, including all solid matter. The best systems will go for several years before they need to be emptied. The use of linear air blowers provides operation that is efficient and economical with little maintenance required for the best systems. Package treatment plants should be located no nearer than 7 metres from inhabited dwellings. In selecting your wastewater solution for off-mains drainage it is important to cover the requirements of the appropriate environmental regulator, BS6297:1983 as amended and local Building Regulations.
Mark Newbery is director at Burnham Environmental Services
H.D. Services are achieving regional success
H.D. Services Ltd. aims to provide the highest quality percussion drilled boreholes, sewage treatment system and Open-Loop ground source heat pump installations in the South East. The company offers a one stop shop for self-builders, developers, contractors, consultants and architects providing waste and drainage solutions, independent water supplies and renewable heating options – all specifically tailored to individual needs and suited to the geology of the South East. It has achieved regional
success winning RHI installer of the Year Award at the Green Deal and ECO Awards, it received a Commitment to Excellence Award in 2017 and were Highly Commended at the Energy Efficiency Awards in 2018.
01494 792000
www.hdservicesltd.co.uk New high-performance ALLroundWork jackets
Performance and comfort at work are integral features of this new range of Winter Jackets. Top athletes have long enjoyed the benefits of performance wear – now professional craftsmen and women can too with Snickers Workwear’s new range of high-performance winter jackets. These new ALLroundWork Jackets are just what the name suggests. There’s a selection of super–lightweight 37.5®
Jackets, Windproof
Shell Jackets, Hi-Vis and Waterproof Jackets plus Parkas that all have the features and
functionality that you’d expect in Snickers working clothes. They’re great looking garments that will keep you looking and feeling comfy wherever you are and whatever you’re doing at work in cold weather.
info@snickersworkwear.co.uk 28
www.sbhonline.co.uk january/february 2019
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