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synthetic blankets are used, the soil should be hydromulched first. <br />100-percent biodegradable blankets are available for use in sensitive areas. These organic <br />blankets are usually held together with a paper or fiber mesh and stitching which may last up <br />to a year. <br />Most netting used with blankets is photodegradable, meaning it breaks down under sunlight <br />(not UV stabilized). However, this process can take months or years even under bright sun. <br />Once vegetation is established, sunlight does not reach the mesh. It is not uncommon to find <br />non -degraded netting still in place several years after installation. This can be a problem if <br />maintenance requires the use of mowers or ditch cleaning equipment. In addition, birds and <br />small animals can become trapped in the netting. <br />Maintenance Standards <br />. Maintain good contact with the ground. Erosion must not occur beneath the net or blanket. <br />Repair and staple any areas of the net or blanket that are damaged or not in close contact with <br />the ground. <br />. Fix and protect eroded areas if erosion occurs due to poorly controlled drainage. <br />2019 Stormwater Management Manual for Western Washington <br />Volume 11 - Chapter 3 - Page 295 <br />