UO North Campus June 15, 2018 <br />Conditional Use Permit Stormwater, Sanitary Sewer, and Water Analysis Report <br /> <br /> <br />Stormwater Flow Control (EC 9.6793): Flow control standards apply when stormwater is discharged <br />to a headwater stream or a pipe that discharges to a head <br />These conditions are not present for this project and flow control is not required. See the Stormwater <br />Destination / Flood Control section for further discussion about possible detention/retention. <br /> <br />Stormwater Oil Control (EC 9.6794): In the context of this site, oil control standards apply to projects <br />that will result in more than 100 vehicles per 1,000 square feet of gross floor area or more than 100 <br />off-street parking spaces. <br /> <br />Stormwater Source Control and Environmental Issues (EC 9.6795): Stormwater source control <br />standards include prescriptive design criteria for activities that present a risk of point source pollution, <br />such as loading areas, trash collection areas, storage of liquid materials, and storage of bulk <br />materials. These standards will apply to future development and redevelopment projects within the <br />site. <br /> <br />The source control standards also apply to land with suspected or known contamination. There <br />have been historic environmental issues throughout the study area, including releases of laboratory <br />wastes, petroleum hydrocarbons, and coal gas tar. Investigation and remediation activity has <br />occurred since the time of the 1990 Environmental Site Assessment. DEQ records indicate the site <br /> Future development projects will include environmental <br />review to ensure the requirements of SWMM Section 3.8 are addressed. <br /> <br />If onsite stormwater management (infiltration) systems are pursued with future development, DEQ <br />and an environmental professional should be consulted to ensure stormwater infiltration does not <br />have adverse environmental impacts. <br />Stormwater Operations and Maintenance: Stormwater facilities will be privately operated and <br />maintained. An Operations and Maintenance Plan will be included with development review <br />submittals for future projects. <br /> <br />SANITARY SEWER <br />Existing gravity-fed public and private sanitary sewer infrastructure is available within the majority of <br />the site south of the railroad tracks and within the eastern portion of the site north of the railroad <br />tracks (Riverfront area). Gravity-fed sanitary sewer systems are not readily available within the <br />western side of the Riverfront area, but pumped systems are possible. Existing and possible future <br />destination points are shown on Drawing C02 and summarized below: <br /> <br />Riverfront Pump Station System (Destination A): Riverfront pump station is a public pump station <br /> <br />serving the eastern half of the site south of the railroad tracks. The pump station is located at <br />the intersection of Riverfront Parkway and Millrace Drive. The pump station discharges <br />e main extending to the south through Riverfront Parkway, <br />-fed main in Franklin Boulevard. Sanitary drainage is <br />public sanitary sewer mains, extending east and west <br />within <br />end of Millrace Drive, and then north under the pedestrian underpass under the railroad tracks. <br /> <br />The mains within Millrace Drive are available to serve adjacent future development to the north <br />and south of Millrace Drive and is capable of being extended farther to the west as a private <br /> <br /> <br /> <br /> <br /> |7 <br /> <br />