December 1998 Criteria for Sewage Works Design How to Use This Manual This manual is intended for use as general design criteria for domestic sewage collection and treatment systems. Criteria contained in this anual will be used by tment of Ecology, Water Quality Program, in the review of documents submitted pursuant to Chapter 173-240WAC Additional design details are contained in the documents referenced in this manual Disclaimer/Limits of Responsibility This manual is not intended to cover every possible situation. It is aimed primarily at a sewage works treating domestic sewage of normal influent strength Definition of Terms this manual are considered synonymous with The terms“ sewage and“ sewerage” as used municipal wastewater"and" domestic wastewater Unless otherwise specified, terms used in this manual are defined in accordance with the latest definitions issued by the Water Environment Federation (WEF). The following reference should be consulted for specific definitions of Glossary-Water and Wastewater Control Engineering. Published by the American Public Health Association(APHA) American Society of Civil Engineers (ASCE), American Water Works Association(AWWA), and the Water Pollution Control Federation(now WEF) Third Edition, 1981viii December 1998 Criteria for Sewage Works Design How to Use This Manual This manual is intended for use as general design criteria for domestic sewage collection and treatment systems. Criteria contained in this manual will be used by the Department of Ecology, Water Quality Program, in the review of documents submitted pursuant to Chapter 173-240 WAC. Additional design details are contained in the documents referenced in this manual. Disclaimer/Limits of Responsibility This manual is not intended to cover every possible situation. It is aimed primarily at a sewage works treating domestic sewage of normal influent strength. Definition of Terms The terms “sewage” and “sewerage” as used in this manual are considered synonymous with “municipal wastewater” and “domestic wastewater.” Unless otherwise specified, terms used in this manual are defined in accordance with the latest definitions issued by the Water Environment Federation (WEF). The following reference should be consulted for specific definitions of terms. • Glossary−Water and Wastewater Control Engineering. Published by the American Public Health Association (APHA), American Society of Civil Engineers (ASCE), American Water Works Association (AWWA), and the Water Pollution Control Federation (now WEF). Third Edition, 1981