Incumbents of positions in this series prepare and/or review scientific reports, review transportation plans and related documents, studies and analytical data of environmental impacts and environmental processes; perform calculations relating to environmental science problems; determine possible impacts on water, soil, and air; measure levels of pollution; identify sources of pollution; and perform related work as required. The basic purpose of this work is to perform professional environmental analysis and planning duties in such areas as stormwater design, water quality mitigation, and watershed management, all in accordance with applicable laws, rules, regulations, standards in addition to environmental principles and practices.