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Jake Reilly, Sector Representative February 12, 2019 Incompleteness Response Plan in Table 4B-8 (part 4B, page 9). Population, household, and employment forecasts by interceptor facility was not provided in the Plan. However, the Plan states that the flow projections were based on residential equivalent connections (RECs), therefore the information is available to the City to provide the forecasts by interceptor for 2020, 2030, and 2040. Response: Table 4B-7 shows the changes to each sewer shed based on Res Unit (top) and Flow (bottom). Table 4B-8 incorporates that growth in projections by interceptor 2010, 2020, 2030, and 2040. Table 3B-4, Community Management Plan, part 3B, page 22 refers to "MUSA Part" expressed in roman numerals. Table has been updated to reflect Arabic numerals, to be consistent with Map 4B-2. These areas are in reference to the City's previous 2030 plan and nowhere in the 2040 Plan are these areas delineated. Include map that identifies these areas. • Council staff encourage the City to review the www.metrocouncil.org/iandi website and Thrive MSP 2040 for current policy and as context in addressing the following requirements for the Plan: o Describe the sources, extent, and significance of existing inflow and infiltration in both the municipal and private sewer systems Response: Included on page 4B-11-12 including a breakdown of residential housing stock age within the community into pre- and post-1970 era, and what percentage of pre-1970 era private services have been evaluated for I/I susceptibility and repair. Response: Table 3C-4 shows the age of housing stock. We did not link that to I/I assumptions because a significant portion of our housing is on private septic, and unmeasurable. We do not see where housing stock breakdowns pre and post 1970 is a requirement in the I/I discussion. Please also include the measured or estimated amount of clearwater flow generated from the public municipal and private sewer systems Response: Table 4B-10 compares measurable sewer flows during wet and dry periods. o Describe the implementation plan for preventing and eliminating excessive inflow and infiltration from entering both the municipal and private sewer systems and include a schedule and the related financial mechanisms planned or needed to implement the I/I mitigation strategy. Response: Municipal I/I reduction starts on page 4B-11. • The Plan does not identify specific locations of future trunk sewer connections to any regional interceptors, nor does it state that none are planned. However, the Plan does state in Part 4B, page 13, under Future Sanitary Sewer System, that future demands for municipal sewer may come up as areas within the MUSA develop. This would infer that the locations of potential trunk sewer extensions would correlate with the projects identified on Map 3B-4 "Planned Development Sites". At least three of the planned Development sites are in proximity to a regional interceptor. Response: Verification added to Future Sanitary Sewer Improvements Paragraph, Page 4B-14 Water Supply (Dave Brown, 651-602-1072)