Standard ATV-DVWK-A 142E Sewers and Drains in Water Catchment Areas

This Standard is to be applied for both already existing water protective zones for groundwater, springs and reservoirs (Protective Zones I – III) and also for catchment areas of water procurement systems for which no water protective zone has been laid down. It is also to be applied analogously to qualitative medicinal spring protective zones. In quantitative medicinal protective zones the effects of interferences to the soil on the hydraulic system and the individual character of the medicinal spring are all important. These assessments are subject to separate considerations to the extent that the depths of interference in accordance with the [German] Protective Zone Ordinance are exceeded (see LAWA [Federal German States Working Group, Water] Directive). The regulations and recommendations given below apply fundamentally for new sewers and drains and for those to be rehabilitated, including the associated shafts and other structures of the local drainage system and the private property drainage system both in the public and private sectors, which are operated as gravity or pressure pipelines. With this it supplements the regulations of EN 476, EN 1610, EN 752, of Advisory Leaflet ATV-M 101 and Standards ATV-A 105E, ATV-A 125E, ATV-DVWK-A 127E, ATV-A 128E, ATV-DVWK-A 139E, ATV-A 140E, ATV-A 147E and ATV-DVWK-A 157E. For existing sewers and drains (commissioned before this Standard came into force) it is to be examined, dependent on the local conditions, to what extent the Standard is to be applied.