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0 U C0 Z W m U) Z U) J 0 a a W z z 0 0 M W U) T ws b Final Technical Memorandum To: Michael Grochala, City of Lino Lakes From: Jon Christensen, WSB Andi Moffatt, WSB Date: April 8, 2020 Re: Wastewater Management — 1-35 Corridor AUAR City of Lino Lakes, Minnesota WSB Project No. R-015144-000 The original Alternative Urban Areawide Review (AUAR) was completed and approved in September 2005. The AUAR analyzed the stormwater impacts of the three development scenarios. Based on the analysis, a Mitigation Plan was developed. AUAR updates are required every five years from the original date of the approved AUAR. Updates were prepared in 2010 and 2015. Each assumed no change in the proposed development land use scenarios and included discussion of mitigation improvements that had been completed at the time. Since the 2015 AUAR update was prepared, the City has completed an updated Comprehensive Plan. This AUAR Update includes review of three scenarios. The information and analysis outlined within this memo is intended to complete a portion of the AUAR Update related to Item # 11.b.i — Water Resources — Wastewater related to revising of the three scenarios. This memo is intended to update the wastewater analysis provided in the original AUAR where applicable. WATER RESOURCES — WASTEWATER Describe effects from project activities on water resources and measures to minimize or mitigate the effects in Item b.i. through Item b.iv. below. Wastewater - For each of the following, describe the sources, quantities and composition of all sanitary, municipal/domestic and industrial wastewater produced or treated at the site. 1) If the wastewater discharge is to a publicly owned treatment facility, identify any pretreatment measures and the ability of the facility to handle the added water and waste loadings, including any effects on, or required expansion of, municipal wastewater infrastructure. 2) If the wastewater discharge is to a subsurface sewage treatment systems (SSTS), describe the system used, the design flow, and suitability of site conditions for such a system. 3) If the wastewater discharge is to surface water, identify the wastewater treatment methods and identify discharge points and proposed effluent limitations to mitigate impacts. Discuss any effects to surface or groundwater from wastewater discharges. KA015144-000\Admin\DOCSWUAR -Update 2020\Water Wastewater\MEMO - 040820 - Wastewater.docx