One of four manuals dealing with the operation of wastewater plants, this document was designed to address the treatment of wastewater from electroplating, metal finishing, and printed circuit board manufacturing. It emphasizes how to operate and maintain facilities which neutralize acidic and basic waters; treat waters containing metals; destroy cyanide; and treat complex metal wastes. The manual contains information on: (1) need to treat metal wastestreams; (2) identification of the sources of metal wastestreams; (3) how to safely store and handle chemicals from a Material Safety Data Sheet (MSDS); (4) what employers must provide for operators regarding the handling of and exposure to hazardous materials in the workplace (employee right-to-know legislation); (5) how to operate and maintain neutralization, metal precipitation, cyanide destruction, and complex metal treatment facilities; (6) how to collect, treat, and dispose of sludges generated by these treatment processes; and (7) how to troubleshoot treatment facilIties described in the manual. The document was designed as a home-study or self-paced instructional course. Included are a final examination, a glossary of terms, and tips on solving arithmetic problems relating to this topic. Numerous diagrams and black and white photographs supplement the text. (TW)