This reference manual provides a list of approximately 300 technical terms and phrases common to environmental engineering which non-English speakers often find difficult to understand in English. Chapter 3 lists the terms and phrases in alphabetical order, followed by a concise English definition, then a translation of the term in French and, finally, an interpretation or translation of the term or phrase in French. Following the French translations section, the columns are reversed in Chapter 4 and reordered alphabetically in French with the English term and translation following the French term or phrase. The objective is to provide a technical term reference manual for non-English speaking students and engineers who are familiar with French, but uncomfortable with English and to provide a similar reference for English speaking students and engineers working in an area of the world where the French language predominates.