water treatment environmental consultants Wastewater treatment environmental impact assessment GEOTEXTILES Ecological Consultancy dredging Protected Species Surveys Habitat Creation Habitat Surveys diving services Ecological Survey Habitat Management Great Crested Newts Water Vole Ecologists protected species Underwater Inspection bioengineering Algae Control reed beds underwater welding Suds Hydroseeding Silt Curtains Aquatic Environments Underwater Cutting Aquatic Engineering Commercial Diving Services Coir Products Bank Stabilisation Floating Islands