; and (B) prevent discharges containing cy­a­no­bac­ter­i­a or related toxins into the St. Lucie and Caloosahatchee watersheds and other areas where such cyanobacteria or related toxins will cause or exacerbate public health risks. (2) Ensuring the integrity and stability of the Herbert Hoover Dike. (3) Maintaining all provisions of applicable State and Federal water quality laws, policies and regulations. (4) Ensuring necessary water volume and quality reaches the Everglades National Park, Florida Bay and Caloosahatchee Watershed to restore the natural habitat. (c) Modification of operations The Secretary of the Army shall modify operations of all current project elements to ensure that public health and safety shall be the prime consideration for the operating regimes of these various elements. (d) Master Operational Manual The Secretary of the Army shall update or develop a Master Operational Manual, in cooperation with the State of Florida, to ensure that all of the various existing operational project elements of the Central and Southern Florida project shall be managed as a system to protect public health and safety. As new elements are completed and added to the project, the Master Operational Manual shall be updated to include the new features. (e) Study The Secretary of the Army, in conjunction with the National Academies of Sciences, shall undertake a study of the legacy of pollution and nutrient loading as well as the impacts of soil amendments that contribute to nutrient uptake that have occurred to Lake Okeechobee from current and past operational regimes. The study shall include— (1) the components of the nutrient load and soil amendments, and how this nutrient loading is and will continue to impact Everglades restoration efforts