PREPARATION OF HANDBOOK OF PRACTICE FOR WATER PLANT WASTE MANAGEMENT   The AWWA Research Foundation selected EE&T to prepare a state-of-the-art design and applications handbook for waste management. To prepare the handbook, EE&T worked with utilities throughout the country to document performance and cost of various mechanical and nonmechanical dewatering systems. The Handbook covers alum, iron, lime, residuals, as well as brines, spent granular activated carbon, adsorbent materials and filter backwash water. The Handbook consist of the following sections:   Characteristics of Water Plant Wastes How to Predict Quantities Testing Procedures Analysis of Potential Toxicity Regulations    Treatment Pilot Studies Residual Thickening Conditioning Pumping Mechanical Dewatering Nonmechanical   Disposal Lagoons Landfill Land Application Co-disposal Direct Discharge   In all cases the emphasis is on how to properly test, design and cost the applicable system.