1019 112TH ST SW 2019-09-25 - Laserfiche WebLink

Community Health Center Element# 10: Control De-Watering De-watering of the site is not expected. If dewatering of the site is needed, all groundwater removed pumped and discharged through a filtering sock and drain into interceptor trenches on site and/or hauled to a City approved site. Element# 11: Maintain BMP's All Temporary Erosion and Sedimentation Control (TESC) devices and equipment will be inspected and maintained on a weekly basis if not sooner, based on storm events contributing to runoff. When construction is complete and the site is stabilized, any existing sediment will be removed and stabilized onsite. Element# 12: Manage the Project A general construction manager will manage the project for or by the owners. The construction manager shall maintain all of the above items in order to minimize sediment transport and turbid water leaving the site. His job will entail continual observation of the grading operations to ensure minimal effects to adjacent properties and offsite waterways. Element# 13: Protect On-Site Stormwater Management BMPs On-site stormwater BMPs primarily consist of permeable pavement along with soil > amendments. Permeable pavement subgrade areas and soil amendment areas will be protected against compaction. Minimal Requirement # 3: Water Pollution Source Control All proposed development is commercial construction consisting mainly of non-pollution generating vegetated runoff and parking lot pavement with less than 5,000 sf new pollution generating hard surfaces. No chemical or industrial type of water pollution is expected from this project. Minimum Requirement # 4: Preservation of Natural Drainage Systems and Outfalls, and provisions of off-site mitigation No changes to the existing drainage systems and outfalls are proposed with this development. Any potential overflow from the proposed permeable pavement and amended landscaping areas is to drain into the existing drainage course. Minimum Requirement#5 On-Site Storm Water Management Due to the project proposing less than 5,000 sf of new hard surfaces, Minimum Requirements #1 through#5 must be evaluated. The project will conform to the requirements within List#1 in section 2.5.5 of Volume I of the SWMMWW. Refer to feasibility list below for appropriate BMP selection or infeasibility description: Lawn and landscaped areas: • Post-Construction Soil Quality and Depth in accordance with BMP T5.13 in Chapter 5 of Volume V. Roofs feasibility description: N/A • • WESTERN ENGINEERS,INC. 11 PROJECT:17-1688-A