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