Carlsbad Desalination Project, San Diego, California. The major challenge of this project was overcoming the opposition the project faced from the public and the EPA. Obtaining permits and the entire approval process was not easy. Finances, scheduling, managing logistics and staying on budget for a project of this magnitude are never simple. Working alongside a working power plant poses a challenge to both construction workers and power plant operators. Back River Wastewater Treatment Plant Upgrade, Baltimore, Maryland. The main current challenge for this project is to modernize the plant in a way that will facilitate future upgrades so that the plant can meet future concentration discharge limits. Meeting new permit limits is another challenge the project will face once construction is complete. Finances, schedule, budget and logistics are other challenges that can never be ignored. Soft floors pose another challenge that needed to be resolved before proceeding with the plant upgrade. Q.5: What are the technical and contractual criteria for the desalination plant? What is public-private