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Eric Charest February 28, 2019 Page 3 of 4 Tetra Tech will work with IRCDUS staff and IRFWCD staff to gather information and create geographic information system (GIS) maps to provide the following details to DEP in support of reclassification: • Map showing the waterbody identification (WBID) numbers for the canals. • Historical and current photographs or topographic maps showing that the waterbody is either manmade or predominately channelized or physically altered. • Information on the current primary purpose of the waterbody such as a narrative description, photographs, operational protocols, permits, memorandums of understanding,. contracts, etc. • Demonstration of maintenance such as records of herbicide application, physical removal of aquatic substrate; dredging of sediments, or removal of riparian trees. • Details onthe land uses, pointsources, and municipal separate storm sewer systems (MS4s) in the area. • Details on the affected TMDLs and BMAP area. Tetra Tech will work with IRCDUS to submit this documentation and will assist with providing additional details for up to two requests for additional information from DEP to obtain approval for the reclassification. Task 3. Aggregate Permit This task will occur after receiving approval from DEP for the waterbody reclassification in Task 2 or after the meeting with DEP in Task 1, if it is determined that thestreams do not need to be reclassified to aggregate the permits. Tetra Tech will coordinate with IRCDUS staff, DEP staff in the local district office, and DEP BMAP staff to determine what information is needed to create an aggregate. permit. The purpose of the aggregate permit will be to aggregate the wasteload allocation assigned to three IRCDUS point source NPDES. facilities to provide flexibility in meeting the TMDL load allocations. The aggregate permit will be a separate permit from the individual facility permits. Tetra Tech will assist IRCDUS staff in preparing the application and supporting documents for the aggregate permit. Tetra Tech will also assist with providing additional details for up to two requests for additional information from DEP t� obtain the aggregate permit. PROJECT SCHEDULE Tetra Tech anticipates commencing project activities upon receipt of a. task order authorization from IRCDUS. This project is anticipated to be completed. by September 30, 2019..This schedule maybe subject to change upon agreement between IRCDUS and Tetra Tech. ASSUMPTIONS Tetra Tech's scope of services, project costs, and schedule were developed with the following assumptions: • IRCDUS and IRFWCD will provide supporting materials in a timely manner.