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4. On long or wide slopes, or slopes subject to wind,tape all seams. <br /> 5. Place plastic into a small (I 2-inchwide by 6-inch deep) slot trench <br /> at the top of the slope and backfill with soil to keep water from <br /> flowing underneath. <br /> 6. Place sand filled burlap or geotextile bags every 3 to 6 feet along <br /> seams and tie them together with twine to hold them in place. <br /> 7. Inspect plastic for rips, tears, and open seams regularly and repair <br /> immediately. This prevents high velocity runoff from contacting <br /> bare soil which causes extreme erosion. <br /> S. Sandbags may be lowered into place tied to ropes. However, all <br /> sandbags must be staked in place. <br /> • Plastic sheeting shall have a minimum thickness of 0.06 millimeters. <br /> • If erosion at the toe of a slope is likely,a gravel berm,riprap, or other <br /> suitable protection shall be installed at the toe of the slope in order to <br /> reduce the velocity of runoff. <br /> Maintenance • Torn sheets trust be replaced and open seams repaired. <br /> Standards • Completely remove and replace the plastic if it begins to deteriorate <br /> due to ultraviolet radiation. <br /> • Completely remove plastic when no longer needed. <br /> • Dispose of old tires used to weight down plastic sheeting <br /> appropriately. <br /> Approi,ed as Ecology has approved products as able to meet the requirements of B MP <br /> Equivalent C 123. The products did not pass through the Technology Assessment <br /> Protocol—Ecology (TAPE)process. Local jurisdictions may choose not <br /> to accept this product approved as equivalent, or may require additional <br /> testing prior to consideration for local use. The products are available for <br /> review on Ecology's website at <br /> http://www.cc_y wa.gov/profit•anis/wellstorniw,itei/neN,vtecli/egtliva_t_e11t litml <br /> BMP C124: Sodding <br /> Purpose The purpose of sodding is to establish permanent turf for immediate <br /> erosion protection and to stabilize drainage ways where concentrated <br /> overland flow will occur. <br /> Conditions of Use Sodding may be used in the following areas: <br /> • Disturbed areas that require short-term or long-term cover. <br /> • Disturbed areas that require immediate vegetative cover. <br /> • All waterways that require vegetative lining. Waterways may also be <br /> seeded rather than sodded, and protected with a net or blanket. <br /> Vohnne 11—Construction Stonnivater Pollution Prevention-August 2012 <br /> 4-27 <br />