Stormwater consultant services, e.g. pollutant calculations, design of stormwater treatment & flow detention facilities and investigations of impacts on receiving waters, acceptable loads and required reduction. Sale and marketing of the stormwater and recipient software StormTac Web. Development of methods for pollutant calculations and the design of stormwater treatment, flow transport and flow detention facilities. Implementation in StormTac Web. Education and support for StormTac Web.