Water Studies Projects Over the years KHAFRA has provided a variety of water studies ranging from Water and Sewer Rate studies to biological and water quality surveys of local rivers. Our Environmental Engineers can design an assessment study based upon your specific need. CHATTAHOOCHEE RIVER BIOLOGICAL SURVEY Fulton County, GA KHAFRA, in conjunction with CH2M Hill performed biological and water quality surveys of the Chattahoochee River, in the Atlanta area. The evaluated stream quality and the health and diversity of the aquatic environment, as well as assess potential impacts from four area wastewater treatment plants. FULTON COUNTY WATER AND SEWER RATE STUDY Atlanta, GA KHAFRA provided engineering services for the removal of several existing underground, diesel fuel storage tanks (UST) at four of BellSouth's Georgia facilities.