Laserfiche WebLink
r. <br /> i <br /> f i <br /> Generally,products come in 40-50 pound bags and include all <br /> necessary ingredients except for seed and fertilizer. <br /> • BFMs and MBFMs provide good alternatives to blankets in most <br /> areas requiring vegetation establishment. Advantages over <br /> r blankets include: <br /> BFM and MBFMs do not require surface preparation. <br /> i <br /> Helicopters can assist in installing BFM and MBFMs in remote <br /> areas. <br /> • On slopes steeper than 2.5H:IV, blanket installers may require <br /> ropes and harnesses for safety. <br /> • Installing BFM and MBFMs can save at least$1,000 per acre <br /> 9 compared to blankets. <br /> Maintenance Reseed any seeded areas that fail to establish at least 80 percent cover <br /> Standards (100 percent cover for areas that receive sheet or concentrated flows). If <br /> Y reseeding is ineffective,use an alternate method such as sodding, <br /> mulching, or nets/blankets. If winter weather prevents adequate grass <br /> growth,this time limit may be relaxed at the discretion of the local <br /> authority when sensitive areas would otherwise be protected. <br /> • Reseed and protect by mulch any areas that experience erosion after <br /> achieving adequate cover. Reseed and protect by mulch any eroded <br /> f area. <br /> • Supply seeded areas with adequate moisture, but do not water to the <br /> extent that it causes runoff. <br /> i <br /> Approved as Ecology has approved products as able to meet the requirements of B.MP <br /> Equivalent C 120. The products did not pass through the Technology Assessment <br /> Protocol—Ecology TAPE process. Local jurisdictions may choose not to <br /> � gY( )P' .l y <br /> accept this product approved as equivalent,or may require additional testing <br /> prior to consideration for local use. The products are available for review on <br /> Ecology's website at <br /> httn://www.ecy.iva.gov/programs/�vq/stormwater/iiewtecli/equivalent.litml <br /> f( � <br /> k <br /> BMP C121: Mulching <br /> Purpose Mulching soils provides immediate temporary protection from erosion. <br /> Mulch also enhances plant establishment by conserving moisture, holding <br /> fertilizer, seed,and topsoil in place, and moderating soil temperatures. <br /> There is an enormous variety of mulches that can be used. This section <br /> discusses only the most common types of mulch. <br /> Conditions of Use As a temporary cover measure, mulch should be used: <br /> For less than 30 days on disturbed areas that require cover. <br /> • At all times for seeded areas, especially during the wet season and <br /> Vohtnte II—Consiniction Sionnwater Po//U11ott Prewittion-August 2012 <br /> 4-19 <br />