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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br />6. When no formed areas are available, washwater and leftover product shall be contained in a lined <br />container or a hole dug on site. Contained concrete shall be disposed of in a manner that does not <br />violate groundwater or surface water quality standards. <br />Maintenance Standards <br />Containers shall be checked for holes in the liner daily during concrete pours and repaired the same day. <br />3.2.19 BMP C152: Saw -cutting and Surfacing Pollution Prevention <br />Purpose <br />Sawcutting and surfacing operations generate slurry and process water that contains fine particles and <br />high pH (concrete cutting), both of which can violate the water quality standards in the receiving water. <br />This BMP is intended to minimize and eliminate process water and slurry from entering waters of the <br />state. <br />Conditions of Use <br />Anytime saw -cutting or surfacing operations take place, these management practices shall be utilized. <br />Sawcutting and surfacing operations include, but are not limited to, the following: <br />1. Sawing <br />2. Coring <br />3. Grinding <br />4. Roughening <br />5. Hydro -demolition <br />6. Bridge and road surfacing. <br />Design and Installation Specifications <br />1. Slurry and cuttings shall be vacuumed during cutting and surfacing operations. <br />2. Slurry and cuttings shall not remain on permanent concrete or asphalt pavement overnight. <br />3. Slurry and cuttings shall not drain to any natural or constructed drainage conveyance. <br />4. Collected slurry and cuttings shall be disposed of in a manner that does not violate groundwater <br />or surface water quality standards. <br />5. Process water that is generated during hydro -demolition, surface roughening or similar operations <br />shall not drain to any natural or constructed drainage conveyance and shall be disposed of in a <br />manner that does not violate groundwater or surface water quality standards. <br />6. Cleaning waste material and demolition debris shall be handled and disposed of in a manner that <br />does not cause contamination of water. If the area is swept with a pick-up sweeper, the material <br />must be hauled out of the area to an appropriate site. <br />Maintenance Standards <br />Continually monitor operations to determine whether slurry, cuttings, or process water could enter waters <br />of the state. If inspections show that a violation of water quality standards could occur, stop operations <br />and immediately implement preventive measures such as berms, barriers, secondary containment, and <br />vacuum trucks. <br />Volume 11— Construction Stormwater Pollution Prevention <br />3-31 <br />