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6 OPERATIONS AND MAINTENANCE <br /> The proposed storm system consists of detention vaults and Stormfilters. <br /> These facilities will require periodic maintenance and inspection based on the <br /> procedures below. The procedures are based on Volume V of the 2010 <br /> Snohomish County Drainage Manual. <br /> Maintenance Defect Conditions When Results Expected <br /> Component Maintenance is When Maintenance is <br /> Needed Performed <br /> Catch Basins Trash &t Debris Trash or debris No trash or debris <br /> which is located located immediately in <br /> immediately in front of catch basin or <br /> front of the catch on grate opening. <br /> basin opening or is <br /> blocking inletting <br /> capacity of the <br /> basin by more <br /> than 10%. <br /> Trash or debris (in No trash or debris in <br /> the basin) that the catch basin. <br /> exceeds 60 <br /> percent of the <br /> sump depth as <br /> measured from <br /> the bottom of <br /> basin to invert of <br /> the lowest pipe <br /> into or out of the <br /> basin, but in no <br /> case less than a <br /> minimum of six <br /> inches clearance <br /> from debris <br /> surface to the <br /> invert of the <br /> lowest pipe. <br /> Trash or debris in Inlet and outlet pipes <br /> any inlet or outlet free of trash and <br /> pipe blocking debris. <br /> more than 1/3 of <br /> its height. <br /> Dead animals or No dead animals or <br /> vegetation that vegetation present <br /> could generate within the catch basin. <br /> odors that could <br /> July 2014 6-1 LDC Job No. 13-144 <br />