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Third Edition Preface

Nick Pizzi is my friend and colleague. When AWWA asked me to consider authoring the third edition of this book, the first thing I did was to contact Nick. He explained that he had decided not to participate in the revision and that he was confident that I would provide professional and current information.

Even though I did not work with Nick on this new edition, his hand is evident throughout. Before making his decision not to do this revision, he had provided suggestions for updates and I have included them. Also, I did not tamper with Nick's style. His words reveal a passion for operations excellence that I can only hope to appreciate.

My approach was to update the many references and illustrations to make them current. I also reviewed the operator certification knowledge requirements included in the Associated Boards of Certification (ABC) Needto- Know criteria. Several state certification boards' (e.g., California, Pennsylvania, and Texas) operator requirements were also added where there were differences. Any topics in these certification requirements that were not already included in the book were added.

The result of these additions and revisions make this book an indispensable reference for all water treatment plant operators and plant managers. The book is equally useful for certification exam studies and as a reference for operations personnel.

I want to thank David Plank, Melissa Valentine, and Alan Roberson at AWWA for their help and support during the publication process. Most of all I want to thank Nick Pizzi for his outstanding book, which I was allowed to supplement.