801 75TH ST SE BLDG 4 2025-08-04

c) Any heavy equipment brought to the site will be in a proper working order and not damage the site from spillage onto the ground or into stormwater runoff. The contractor will be responsible for promptly cleaning any areas where spillage occurs. d) No application of agricultural chemicals, fertilizers and pesticides will occur throughout the construction project and until all permanent stormwater facilities are placed back into final permanent operation. e) Concrete handling BMP's shall be employed by the contractor to treat stormwater runoff using pH modifying sources. This includes new concrete washing and curing waters and waste streams generated by concrete grinding and sawcutting, exposed aggregate processes and concrete pumping and mixer washout waters. Stormwater discharges shall not violate water quality standards for pH in receiving waters. f) Only COz or dry ice will only be used adjust pH. g) BMP C 151: The contractor will utilize concrete handling measures for limited concrete work required on -site. BMP C 152: The contractor will utilize sawcutting and surface pollution prevention BMP measures when required. Element #10: Control Dewatering a) Foundation or trench dewatering work is not planned for this construction project. In the event foundation or trench dewatering becomes necessary, the water discharged from the foundation or trench will be discharged to a waste truck and removed from the site. b) The use of a sedimentation bag is permitted for small volumes of localized dewatering. Element #11: Maintain BMP's a) All temporary erosion and sedimentation control BMP's will be maintained and repaired throughout the course of the repair project. b) All temporary erosion and sedimentation control measures will be removed from the site within 30 days of the completion of the repair project and placing the existing drainage system back into full and proper operation. 14037B C-SWPPP Narrative