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i. Each stormwater system is unique and multiple criteria can affect maintenance frequency <br /> such as: <br /> a) System Design: pre-treatment/no-pretreatment, inlet protection, stand alone <br /> device. <br /> b) Surface Area Collecting From: hardscape,gravel, soil. <br /> c) Adjacent Area: soil runoff, gravel,trash. <br /> d) Seasonal Changes:fall-leaves,winter-salt/cinders. <br /> b. Second year plus; establish an annual inspection frequency based on the information collected <br /> during the first year.At a minimum an inspection should be perform semi-annually. <br /> c. Seasonal change; regional areas affected by seasonal change(spring, summer,fall, winter) may <br /> require additional inspections at the change of seasons in addition to semi-annually. <br /> 2. Inspect: <br /> a. Inspection ports. <br /> b. Inflow and outflow points including the inlet/manhole and pipes. <br /> c. Discharge area. <br /> 3. Identify and Report maintenance required: <br /> a. Sediment and debris accumulation. <br /> b. System backing up. <br /> c. Flow rate change. <br /> Maintenance Procedures: <br /> 1. Conform to all local, state and federal regulations. <br /> 2. Determine if maintenance is required. If a pre-treatment device is installed,follow manufacturer <br /> recommendations. <br /> 3. Using a vacuum pump truck evacuate debris from the inflow and outflow points. <br /> 4. Flush the system with clean water forcing debris from the system.Take care to avoid extreme direct <br /> water pressure when flushing the system. <br /> 5. Repeat steps 3 and 4 until no debris is evident. <br /> These maintenance guidelines were written by Brentwood Industries, Inc.with the express purpose of <br /> providing helpful hints.These guidelines are not to be construed as the only Brentwood approved <br /> methods for StormTankTM system maintenance or the final authority in system maintenance. Check with <br /> the stormwater system owner/project engineer for their contract/specification requirements and or <br /> recommendations. Contact your local StormTankTM distributor or Brentwood Industries for additional <br /> technical support if required. <br /> C� BRENTWOOD <br /> Revision: 610 Morgantown Road,Reading,PA 19611 <br /> 9/12/13 P:610-374-5109 F:610-736-1280 Email:Stormwater@brentwoodindustries.com 2 of 2 <br />