Stanford University
OP-23: Rainwater Management

Stanford University employs multiple strategies to reduce storm water runoff from new development and existing campus operations. Stanford developed two master plans for managing and implementing storm water treatment and runoff: (A) The Stanford University Campus-wide Stormwater Treatment Master Plan (B) The Stanford University Campus-wide Storm Drainage Master Plan In addition, Stanford University complies with several permit requirements associated with the California Regional Water Quality Control Board, San Francisco Bay Region, Municipal Regional Stormwater NPDES Permit, Order R2-2015-0049, NPDES Permit No. CAS612008, as implemented by Stanford’s permitting authority, Santa Clara County. Permit conditions require Stanford to comply with storm water pollution prevention principles including: (1) Site Design Controls (minimize impervious surfaces, conserve natural areas, minimize site runoff)-- example installations include: (1a) Installation of porous pavement (Oak Road and Stock Farm Road Parking Lot and Lasuen Parking Lot) (1b) Rain water harvesting to in-ground tank used for irrigation (Knight Management Center - Graduate School of Business Project) (2) Source Control (minimize contact between pollutants and storm water runoff)--example installations include: (2a) Covered loading docks (Medical School Loading Dock) (2b)Appropriate covers, drains and storage precautions for outdoor material storage areas and loading docks (Medical School Loading Dock, East Campus Dining Facility, Lagunita Dining) (3) Treatment Devices--example installations include: (3a) Bioswales and Bioretention (Knight Management Center - Graduate School of Business Project, Olmstead Terrace Project, Coaches Rental Housing Project, Arrillaga Outdoor Education and Recreation Center, Arrillaga Family Sports Center Addition, Bing Concert Hall, East Campus Dining Facility, SRAF Building, Process Steam Plant, Anderson collection, McMurtry Art, Kennedy Comstock Housing, Central Energy Facility, Searsville Parking) (3b) Swales (Knight Management Center - Graduate School of Business Project, Campus Drive Bowdoin to Arguello, Campus Drive Panama Street to Via Ortega, Automotive Innovation Facility Project) (3c) Infiltration Trenches (Stern-Wilbur Recreation Field, Galvez Parking Lot, Lasuen Parking Lot, SIM 1 Building, Sand Volleyball) (3d) Regional continuous deflection separation devices (Welch Road and Pasteur Drive - CDS Unit, Stanford Stadium – CDS Unit) (3e) Regional detention basins (Sand Hill Road and Stock Farm Road, El Camino Real and Serra Street, West Campus Detention between Oak Rd and Sand Hill Road) (3f) Regional Bioswale (Roth Way and Lomita Drive) Please see the following website for more information: http://www.scvurppp-w2k.com/site_design.shtml To control the quantity of water released from campus, there are three detention basins, located at Stock Farm Road and Oak Road, El Camino Real and Serra Street, and between Oak Rd and Sand Hill Road. The Knight Management Center has rain water harvesting (collected roof runoff is stored in a 75,000 gallon underground tank and reused for irrigation on site). The campus also has regional Stormwater Swirl Separators (2 total), which remove trash and small particulate from tributary campus runoff. There is a living/vegetated roof on Parking Structure 6. Porous pavement has been installed at the Oak Road, and Stock Farm Road parking lots (there are 3 different types installed – pervious pavers, pervious asphalt and pervious concrete). Rain gardens or bioretention areas are present at the following areas: Knight Management Center - Graduate School of Business Project, Coaches Rental Housing Project, Arrillaga Outdoor Education and Recreation Center, Arrillaga Family Sports Center, Bing Concert Hall, East Campus Dining Facility, SRAF Building, Process Steam Plant, Anderson collection, McMurtry Art, Kennedy Comstock Housing, Central Energy Facility, Searsville Parking, Roth Way and Lomita Drive Vegetated swales can be found in the following locations across campus: -- Olmstead Terrace Housing Project -- Coaches Rental Housing Project -- Automotive Innovation Facility Project -- Campus Drive (Bowdoin Street to Arguello Mall) -- Campus Drive (Panama Street to Via Ortega)\ -- Roth Way and Lomita Drive -- Madera Childcare Center -- Arboretum Child Care -- Equestrian Center Downspout disconnection is required for projects subject to the National Pollutant Discharge Elimination System (NPDES) permit and is encouraged as a site design measure for all other campus projects.

The campus storm water/rainwater management policy comprises compliance with all applicable regulations and conditions of the General Use Permit. Flood control is provided by a subsurface storm drain collection system that discharges to detention basins that regulate the peak flow rate discharged from campus in both the 10-year and 100-year storms. Overland flow paths and flood barriers protect structures on campus and provide for an overland release of runoff. Storm water quality is managed through distributed treatment facilities such as bioswales, bioretention, vegetated swales, pervious pavements, interceptor trees, and Continuous Deflection Separation (CDS) units. Additional Hydromodification Controls are in place for projects as required by the permit. New development and redevelopment projects on campus follow LID Site design guidelines and green building standards.