1710 W MARINE VIEW DR 2024-01-03

. Always use forms or solid barriers for concrete pours, such as pilings, within 15-feet of surface waters. . Refer to BMP C252: Treating and Disposing of High pH Water for pH adjustment require- ments. . Refer to the Construction Stormwater General Permit (CSWGP) for pH monitoring require- ments if the project involves one of the following activities: • Significant concrete work (as defined in the CSWGP). • The use of soils amended with (but not limited to) Portland cement -treated base, cement kiln dust or fly ash. • Discharging stormwater to segments of water bodies on the 303(d) list (Category 5) for high pH. Maintenance Standards Check containers for holes in the liner daily during concrete pours and repair the same day. BMP C152: Sawcutting and Surfacing Pollution Prevention Purpose Sawcutting and surfacing operations generate slurry and process water that contains fine particles and high pH (concrete cutting), both of which can violate the water quality standards in the receiving water. Concrete spillage or concrete discharge to waters of the State is prohibited. Use this BMP to minimize and eliminate process water and slung created through sawcutting or surfacing from enter- ing waters of the State. Conditions of Use Utilize these management practices anytime sawcutting or surfacing operations take place. Saw - cutting and surfacing operations include, but are not limited to: . Sawing . Coring . Grinding . Roughening . Hydro -demolition . Bridge and road surfacing 2019 Stormwater Management Manual for Western Washington Volume 11 - Chapter 3 - Page 317