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No. 22-Facility Discharge Points <br /> Drainage System Potential Conditions When Maintenance Is Results Expected When Maintenance <br /> Feature Defect _ -Needed Is Performed Or Not Needed <br /> Monitoring Inspection of Sheen,obvious oil or other Identify and eliminate pollution source <br /> Discharge Water contaminants present. AND report discharge to Snohomish <br /> for Obvious County Surface Water Management <br /> Signs of Poor Division. <br /> Water Quality. <br /> Effluent discharge from facility should be <br /> clear. <br /> Receiving Area Water in receiving area is causing Receiving area sound. <br /> Saturated substrate to become saturated and <br /> unstable. <br /> General Rock Pad- Only one layer of rock exists above Rock pad replaced to design standards. <br /> Missing or native soil in area five square feet or <br /> Moved Rock larger,or any exposure of native soil <br /> where pad was originally installed. <br /> Rock Pad- Soil erosion in or adjacent to rock pad. Rock pad replaced to design standards. <br /> Erosion <br /> Obstructions, Roots or debris enters pipe or deforms Use mechanical methods to remove root <br /> Including Roots pipe,reducing flow if possible.Use of chemicals to remove <br /> roots shall be done in accordance with <br /> Integrated Pest Management plan. If <br /> necessary,remove the vegetation over the <br /> line <br /> Pipe Rusted or Any part of the pipe that is broken, Pipe repaired or replaced. <br /> Deteriorated crushed or deformed more than 20%or <br /> any other failure to the piping <br /> September 2010 Snohomish County Drainage Manual Volume V-Runoff Treatment BMPs 50 <br />