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6. Place sand filled burlap or geotextile bags every 3 to 6 feet along seams and <br /> 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 bare soil <br /> which causes extreme erosion. <br /> 8. Sandbags may be lowered into place tied to ropes. However, all sandbags <br /> 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 suitable <br /> protection shall be installed at the toe of the slope in order to reduce the velocity <br /> of runoff. <br /> Maintenance Standards <br /> • Torn sheets must be replaced and open seams repaired. <br /> • Completely remove and replace the plastic if it begins to deteriorate due to <br /> ultraviolet radiation. <br /> • Completely remove plastic when no longer needed. <br /> • Dispose of old tires used to weight down plastic sheeting appropriately. <br /> Approved as Equivalent <br /> Ecology has approved products as able to meet the requirements of BMP C123: Plastic <br /> Covering. The products did not pass through the Technology Assessment Protocol — <br /> Ecology (TAPE) process. Local jurisdictions may choose not to accept this product <br /> approved as equivalent, or may require additional testing prior to consideration for local <br /> use. The products are available for review on Ecology's website at <br /> http://www.ecv.wa.qov/programs/wq/stormwater/newtech/equivalent.html <br /> Page 135 <br />