Ord 2009-080 - Laserfiche WebLink

Home Browse Search

• provides for other options 4.04. Environmental. The Property Owner shall comply with all federal, state and local storm water discharge registration, notification, monitoring and construction runoff protection requirements and required erosion /sedimentation controls. With regard to storm water drainage, the project shall not cause the run off of storm water drainage in flows that are in excess of the existing flows off the Property in its present condition. Water quality treatment for the proposed site will be designed to remove approximately 85% of the on -site TSS pollutant loads which is in excess of the City of San Marcos requirements. This project reserves the ability to participate in a water quality treatment fee -in -lieu of program, should one become available prior to site development. In addition the project will incorporate the following sustainable features: a. Reduce impervious cover by creating landscape pockets. This property is nearly 100% impervious as of today. This project will create landscape pockets that will reduce the impervious cover to 88 %. Permitted Impervious Cover Proposed Impervious Cover 80% impervious cover permitted by LDC. 88% impervious cover proposed. Property is currently approximately 100% impervious cover. b. Water runoff filtration will be achieved through the use of a landscape bioswale and /or a bioretention water quality treatment facility on the property. • A common definition of a bioswale is as follows: Bioswa /es are landscape elements designed to remove silt and pollution from surface runoff water. They consist of a swaled drainage course with gently sloped sides (less than six percent) and filled with vegetation, compost and /or riprap. The water's flow path, along with the wide and shallow ditch, is designed to maximize the time water spends in the swale, which aids the trapping of pollutants and silt... A common application is around parking lots, where substantial automotive pollution is collected by the paving and then flushed by rain. The bioswale, or other type of biofilter, wraps around the parking lot and treats the runoff before releasing it to the watershed or storm sewer. c. Reduce energy consumption through the use of passive solar design. d. As required by the City code, reduce the amount of water consumption through the use of native plants that require less irrigation. e. Reduced Heat - Island effect by reducing the amount of asphalt, maximizing the landscape mass, and providing shade to highly reflective materials. f. Reduce over all carbon footprint by using regional and recycled materials (i.e. Local Stone & Recycled Steel) • Required Environmental Controls Proposed Environmental Controls Water quality required Water quality treatment achieved through installation of a landscape bioswale 13