Formula/Conversion Table for Wastewater Treatment, Collection, Industrial Waste, and Wastewater Laboratory Exams

Water Environment Federation

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WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition

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WEF/WPI/C2EP Collection Systems Operators’ Guide to Preparing for the Certification Examination, 2nd Edition was prepared jointly by the Water Environment Federation, the Water Professionals International (WPI), and the Certification Commission for Environmental Professionals (C2EP). The second edition of this critical study guide has been updated to reflect new Need-to-Know Criteria and core competencies for collection of system operators.
The questions in this guide are carefully selected to reflect the full range of responsibilities associated with a collection system operator’s role. Designed to mirror the format and scope of certification exams, they provide a representative sample of question styles and key topics, helping readers build familiarity and confidence in preparation for testing.
The guide includes C2EP's education and experience requirements, tips for taking a certification examination, and sample formulas and conversions. Detailed answers to mathematical problems and references are provided.

Author(s)

Water Environment Federation

SourceWEF/WPI/C2EP Collection System Operators’ Guide to Preparing for the Certification Examination (2nd edition) Task Force

Document typeDigital Book

PublisherWater Environment Federation

Print publication date Sep 2026

Print ISBN 978-1-57278-492-5

EISBN 9781572784925

Volume / Issue

First / last page(s)1 - 98

Word count15,495

Subject keywordsCollection systemstrainingcertificationstudycertification examoperatorsworkforceoperationstest questionsstudy guide

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Formula/Conversion Table for Wastewater Treatment, Collection, Industrial Waste, and Wastewater Laboratory Exams

WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition

Chapter illustrations ()