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Page 12 Attachment B: Supporting Research November 24, 2020 Update 2 — Research Review Phase of IRL Plan 8,087 lbs/yr of TP. In Project Zone SIRL, as of most recent draft allocation numbers, the County has a required reduction of 2 lbs/yr of TN and 1 lbs/yr of TP. This brings the County's total reductions to 210,695 lbs/yr of TN and 29,649 lbs/yr of TP, well in excess of the initial numbers discussed during TMDL development under the previous model. FDEP's statewide ruling on biosolids is currently under revision and has the potential to impact the health of the Lagoon through surface water and groundwater transport of excess nutrients. FDEP is developing these amendments to ensure the proper management, use, and land application of biosolids to protect waters of the state from nutrient pollution, and in a manner that minimizes the migration of nutrients to prevent the impairment of waterbodies. Draft revisions include changes to the nutrient management plans (NMP), which includes updates to the criteria used for determining biosolids application rates, descriptions on how it complies with any applicable BMAPs, requirement for (at least) annual soil fertility testing, provisions for septage application rates, and annual requirements to review NMPs and make revisions as applicable. These draft revisions also include changes to monitoring, record keeping, reporting, and notification of biosolid application. These changes include methods for water extractable phosphorus (WEP), required monitoring of WEPs in biosolids, required soil fertility testing to use the "Phosphorus Index" test provided by the University of Florida's Institute of Food and Agricultural Services (IFAS) Extension Lab, revised groundwater monitoring requirements, and the inclusion of surface water monitoring for sites next to surface waters. The draft revisions also include changes to the requirements for land application of biosolids, which includes prohibition of land application on soils having a seasonal high water table less than 15 cm from soil surface or within 15 cm of the intended depth of biosolids placement. Finally, the changes included some septage provisions, and provisions related to the public interest of biosolid permit applications. However, these changes still allow local governments to keep existing biosolid ordinances, so it is recommended that the County continue their moratorium on the land application of biosolids in order to protect the Lagoon. With an update effective as of July 1, 2020, Senate Bill 712, "The Clean Waterways Act," takes a step towards protecting water quality and conserving natural resources in the state by minimizing impacts of known sources of nutrient pollutions. This update provides changes to protocols for the following topics: onsite sewage treatment and disposal systems, wastewater treatment, stormwater, agriculture, biosolids, fines and penalties, water quality monitoring, bottle water, and golf courses. The updates from this bill are as follows: • Onsite sewage treatment and disposal systems o Transfers the Onsite Sewage Program from the Department of Health (DOH) to FDEP starting in 2021, with a temporary advisory committee o Requires local governments to create septic remediation plans for areas falling within certain BMAPs o Fast tracks the approval process for nutrient reducing septic systems o Revises provisions relating to septic system setback rules • Wastewater treatment o Requires local governments to create wastewater treatment plans for certain BMAP areas 113