1. Supplement to Federal guidelines, design, operation and maintenance of wastewater treatment facilities: Design series, technical bulletins. D-71-1 to D-71-3. Storage and handling facilities for chemicals utilized in wastewater treatment; 2, Use of mercury in wastewater treatment plant equipment; 3, Use of new and advanced wastewater treatment technology. Bookmark Corporate/Agency Authors: Water Programs Office and Environmental Protection Agency Publisher: Water Programs Office Date: Oct. 15, 1971 SuDoc number: EP 2.3/2:D-71-1 to D-71-3