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, <br /> IL Preliminary Conditions Summary <br /> Prc-dcveloped conditions of the proposed Craftsman District Phase 2 project site consists <br /> of approx 2 acres including areas paved :.nd gravel industrial yard, including 1 building <br /> to be demolished, and building foundation piles from the existing Collins building <br /> demolition p�oject. Due to the extensive design changes to the layout and proposed <br /> operutions all existing stonnwatcr facilities on site must be demolished or abandoned in <br /> place. <br /> Yer the Phasc I Report: Thcre arc 3 existing outfalls located along 2"`� Ave that have been I <br /> upgraded as part of the 12'h Street Murina project to accommodate stormwater discharges <br /> from existing industrial yards, the new Craftsman District Bouryard, the new Bayside <br /> Marine development, and future craftsman district expansions. <br /> III. Off-site Analysis <br /> All drainage basins are direcHy discharged after treatment ro surface waters or the COE's <br /> sanitary scwer system. An off-site analysis, as a result, is not reyuired. <br /> IV. Analysis and Design of Required Erosion and Sediment Control BMP's <br /> Temporarv Grosion Sediment Control <br /> The TESC plan includes the use of silt fence, rock stabilized construction acccss points <br /> und existing catch basins lined with filter bags to collect sediment. <br /> Permanent Erosion Sediment Control <br /> • All stormwater systems will be closed convcyanccs. Any scdiment that collects <br /> in thc w�t tanks or wet ponds will not bc subjectcd to any velocities greuter than I <br /> fps dw•ing the 100-years stonn to minimizc suspension of sediment in the <br /> srormwatcr. Rock protcction at the outfalls havc bccn installcd. <br /> • Per Phase I Design: Maintenancc for outlet proter,tion at the outfalls will includc: <br /> inspection and repair as necess.iry; rock additions as nccessary to maintain thc <br /> intended function and periodic cleaning of the energy dissipater as sediment <br /> builds up. <br /> V. Analysis und Design oP Required Runof'f Control BMP's <br /> Thc acccss and rurking arcas, and boat yard work areas havc bcen subdividcd into a <br /> numbcr oP drainage sub-basins 1'or stormwatcr analysis. Thc basin boundarics and arca <br /> calculations are provided in the figures in Appendix A. <br /> - � - <br />