Nutri-Blend Biosolids Land Application - A Virginia-based company with more than 30 years of experience in the responsible land application of biosolids. - http://www.nutri-blend.com/
Omni Instruments - Suppliers of instrumentation , dataloggers ,radio and telemetry for the water , waste water and industrial sectors. sales , service and installations. - http://www.omniinstruments.ie
How Stuff Works: Landfills - Complete narrated photographic tour of how a landfill really operates. - http://www.howstuffworks.com/landfill.htm