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Stantec <br /> BMP Designation Responsible Party Description of inspection and Maintenance Activity Frequency of Maintenance <br /> Extended Waste Evaluate health of vegetation and remove and Twice a year <br /> Detention Basin Management of replace any dead or dying plants. Remove all green <br /> Alameda County or waste <br /> Contracted Third <br /> Party <br /> Extended Waste Conduct regular mowing and remove all grass Weekly during rainy season, <br /> Detention Basin Management of cuttings. Avoid producing ruts when mowing. monthly during dry season <br /> Alameda County or <br /> Contracted Third <br /> Party <br /> Extended Waste Remove sediment from forebay when the sediment As needed <br /> Detention Basin Management of level reaches the level shown on the fixed vertical <br /> Alameda County or sediment marker. <br /> Contracted Third <br /> Party <br /> Extended Waste Remove accumulated sediment and regard when Every 10 years, or as needed <br /> Detention Basin Management of the accumulated sediment volume exceeds 10%of <br /> Alameda County or basin volume <br /> Contracted Third <br /> Party <br /> Extended Waste Remove accumulated trash and debris from the Twice a year (January and <br /> Detention Basin Management of extended detention basin at the middle and end of April) <br /> Alameda County or the wet season. <br /> Contracted Third <br /> Party <br />