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1 <br /> 1 <br /> 1 1Itü <br /> Maintenance <br /> ' Simple maintenance of the Filterra® is required to continue effective pollutant removal from <br /> stormwater runoff before discharge into downstream waters. This procedure will also extend the <br /> longevity of the living biofilter system. The unit will recycle and accumulate pollutants within <br /> the biomass, but is also subjected to other materials entering the throat. This may include trash, <br /> silt and leaves etc. which will be contained within the void below the top grate and above the <br /> mulch layer. Too much silt may inhibit the Filterra's® flow rate, which is the reason for site <br /> stabilization before activation. Regular replacement of the mulch stops accumulation of such <br /> sediment. <br /> ' Americast includes a 1-year maintenance plan with each system purchase. Annual maintenance <br /> consists of a maximum of two (2) scheduled visits. The start of the maintenance plan begins <br /> when the system is activated for full operation. Full operation is defined as the unit installed, <br /> curb and gutter and transitions in place and activation (by Supplier) when mulch and plant are <br /> added and temporary throat protection removed.Activation cannot be carried out until the site is <br /> fully stabilized (full landscaping, grass cover, final paving and street sweeping completed). <br /> Maintenance visits are scheduled seasonally; the spring visit aims to clean up after winter loads <br /> U <br /> including salts and sands.The fall visit helps the system by removing excessive leaf litter. <br /> Some sites may be subjected to extreme sediment or trash loads, requiring more frequent <br /> maintenance visits. This is the reason for detailed notes of maintenance actions per unit,helping <br /> the Supplier and Owner predict future maintenance frequencies, reflecting individual site <br /> conditions. <br /> Owners must promptly notify the (maintenance) Supplier of any damage to the plant(s), which <br /> constitute(s) an integral part of the bioretention technology. Owners should also advise other <br /> landscape or maintenance contractors to leave all maintenance to the Supplier(i.e. no pruning or <br /> fertilizing). <br /> ' Exclusion of Services <br /> It is the responsibility of the owner to provide adequate irrigation year around to the plant of the <br /> ' Filterra®system. <br /> Clean up due to major contamination such as oils, chemicals, toxic spills, etc. will result in <br /> ' additional costs and are not covered under the Supplier maintenance contract. Should a major <br /> contamination event occur, the Owner must block off the outlet pipe of the Filterra® (where the <br /> cleaned runoff drains to, such as drop-inlet) and block off the throat of the Filterra®. The <br /> ' Supplier should be informed immediately. <br /> 12/29104 www.filterra.com <br /> I <br />