801 E CASINO RD 2019-02-01 - Laserfiche WebLink

2.4 Ground Cover In the vicinity of the track and field, the ground cover consists of primarily grassy areas with a new rubberized track, which was improved last year. Immediately south of the project site, there are several storage buildings with paved areas. This part of the campus is located outside of the construction limits and will not be disturbed. Similarly, a short concrete walk along the southeast corner of the track will remain and will not be affected by construction activities. 2.5 Critical Areas There are no known critical areas within or adjacent to the project site. 2.6 Adjacent Areas See Section 1.1 —General Project Description for discussion of adjacent areas. 3.0 SITE DEVELOPMENT PLAN AND MINIMUM REQUIREMENTS SUMMARY The minimum requirements that apply to this project are reviewed in this section. We will identify the thresholds that determine the applicability of the minimum requirements specified in the 2010 Stormwater Management Manual. 3.1 Applicability of Minimum Requirements This redevelopment project proposes approximately 8,798 square feet of asphalt and concrete paving for a new pedestrian path and to support a set of bleachers. Based on Section 2.1.1 of the Stormwater Management Manual, this project is subject to Minimum Requirements #1 through #5 and#7 through#9 since the following thresholds have been exceeded: • Creates or adds 2,000 square feet, or greater, of new, replaced, or total of new plus replaced impervious surface area. • Has land-disturbing activity of 7,000 square feet or greater. • Creates or adds 5,000 square feet or more of new impervious surfaces. 3.2 Minimum Requirements 3.2.1 M.R.#1—Stormwater Site Plan Preparation The Construction Documents include both existing and proposed drainage plans with associated grading. The Stormwater Site Plan also includes the contents of this report. 3.2.2 M.R.#2—Construction Stormwater Pollution Prevention The project will incorporate erosion and sedimentation control systems to address specific site conditions during construction in accordance with the Stormwater Management Manual. Because more than 1 acre of area will be disturbed, a Construction Stormwater General Permit will be obtained from the Washington State Department of Ecology. Perimeter control of the construction area will be provided using silt fencing to reduce the risk of sediment transport into adjacent roads and downstream properties. Ground cover measures and sedimentation tanks are also Technical Information Report Synthetic Turf Field Project 2 Integrityworks Consulting Engineers,LLC Project No.212107