This Request for Proposals (RFP) is soliciting Professional Engineering Services consultant in support of a feasibility study to identify and evaluate alternatives for long-term regional alternatives to the land application of biosolids. This cooperative solicitation is led by Virginia Sanitation Authority d/b/a AlexRenew on behalf of The City of Alexandria, Fauquier County Water and Sanitation Authority (WSA), Loudoun County Sanitation Authority d/b/a Loudoun Water, Prince William County Service Authority d/b/a Prince William Water, and Upper Occoquan Service Authority (UOSA).