3620 BROADWAY VERIZON 2019-01-11

, y Requirement#3- Source Control of Pollution This project is simple, straight forward and short in duration. There are no pollutants on- site that water must not come in contact with, except for sedimentation due to soil erosion. The main source of stormwater will come into contact with the native soil. The protections are noted above. Requirement#4-Preservation of Drainage Systems and Outfall The project will maintain and preserve the existing drainage path. The on-site stormwater shall be collected and discharged to the existing CB system along Broadway the natural drainage path downstream of the project site. Tight lining of downspouts and footing drains will be utilized to route stormwater to the base of the site without causing erosion or drainage impacts to the downstream neighboring properties. UPSTREAM DRAINAGE The site has no upstream drainage onto the property as the land slopes away from the property. DOWNSTREAM DRAINAGE Stormwater runoff collects onsite and sheet flows to the existing CB on Broadway in the curb gutter and sidewalk with storm drainage conveyance system. No impacts to the downstream drainage system are anticipated with the development of Stadium Flowers site. Requirement#5-Onsite Stormwater Management The project will provide tightlined connections at all downspouts locations. A solid 6" PVC pipe will direct runoff from the downspouts to the existing catch basin found in the Broadway R/W. No flooding or erosion impacts are anticipated with the development of this site. OPERATION AND MAINTENANCE Maintenance of the downspouts and conveyance system should be on a yearly basis. Pipes and yard/or catch basins that have more than 2 inches of sediment should be cleaned regularly.