1
Chemicals used in industry, in particular adsorption materials or filtration materials with an iron oxide or iron hydroxide base, for water treatment, filtration materials, in particular filter granules or activated carbon; water purifying agents, water treatment preparations and fertilisers, in particular liquid plant manures, carbonates, trace elements, strontium, magnesium, iodine, algicides, minerals or bacteriological cultures, disinfectants
11
Waste water cleaning installations; air conditioning installations; drinking water supply devices; drinking water treatment devices, in particular for removing arsenic, iron or manganese
35
Wholesale or retail services, the aforesaid services all in relation to filtration materials, water purifying agents, water treatment preparations, fertilisers, waste water purifying installations, air conditioning installations, drinking water supply devices, drinking water treatment devices
37
Building construction, in particular drilling, sampling or sample testing at building sites; repair, in particular regeneration of filtration materials; disinfecting of air conditioning, drinking water supply or drinking water treatment installations; rental of waste water purifying installations, air conditioning installations, drinking water supply devices, drinking water treatment devices, sampling devices or measuring instruments; extension of bore holes at groundwater measuring points or ground level air measuring points; remediation of abandoned polluted areas; waste water purification
40
Treatment of materials, in particular preparation of filtration materials for use in water treatment
42
Technical project studies, in particular for remediation of abandoned polluted areas, waste water purifying devices, waste water purifying processes, drinking water supply, water treatment processes, exploration works, including using hand drills or percussion coring devices, or for the extension of bore holes at groundwater measuring points or ground level air measuring points; Providing technical, chemical or geological expertise, in particular expertise with regard to building construction, sites with contaminated soils, building materials, water or air, or expertise with regard to sampling or prospecting or for sampling media of all kinds, mainly soils, building materials, solids, waste, water or air; Providing expertise with regard to waste disposal, in particular with regard to soils, building materials, water, air, demolition material, waste, or in particular in relation to waste management; Consultancy with regard to technical project planning, the providing of technical, chemical and geological expertise, the providing of disposal expertise, or with regard to the surveying or remediation of abandoned polluted areas or sites, or with regard to drinking water supplies or matters relating to the treatment of water; Dead works, in particular using hand drills or percussion coring devices; engineering office services; Sampling (all media), conducting research projects with a microbiological or chemical orientation, environmental protection consultancy