A-1 Landscaping and Construction, Inc. 7/20/2016

Turbiditycurtains should be oriented parallel to the direction of flow to the extent it can be. The curtain height shall provide sufficient slack to allow the top of the curtain to rise to the maximum expected high-water level (including waves) while the bottom maintains continuous contact with the bottom of the water body. The bottom edge of the curtain shall have a weight system capable of holding the bottom of the curtain down and conforming to the bottom of the water body, so as to prohibit escape of turbid water under the curtain. The turbidity curtain shall be located beyond the lateral limits of the construction site and firmly anchored in place. The alignment should be set as close to the work area as possible but not so close as to be disturbed by construction equipment. The height of the curtain shall be a minimum 20 percent greater than the depth of the water to allow for water level fluctuations. The area of proposed installation of the curtain shall be inspected for obstacles and impediments that could damage the curtain or impair its effectiveness to retain sediment. Supplemental anchors of the turbidity curtain toe shall be used, as needed, depending on water surface disturbances such as boats and wave action by winds. Monitoring The turbidity curtain shall be inspected daily and repaired or replaced immediately if damage or failure is noticed. If the curtain is oriented in a manner that faces the prevailing winds, frequent checks of the anchorage shall be made. While inspecting, look for areas where turbid water is escaping into the larger water body. The contractor shall be responsible for maintenance of the filter curtain for the duration of the project in order to ensure the continuous protection of the watercourse. When the curtain is no longer required as determined by the inspector, the curtain and related components shall be removed in such a manner as to minimize turbidity. Remaining sediment shall be sufficiently settled before removing the curtain. Sediment may be removed and the original depth restored. Any spoils must be hauled away or taken to upland area and be stabilized. Any floating construction or natural debris shall be immediately removed to prevent ' damage to the curtain. Section 8-01.4 page 111 is revised as follows: Measurement Section 8-01.4 is supplemented with the following amended as follows: (August 3, 2015******) When the Bid Proposal contains the lump sum item "Erosion Control and Water Pollution Prevention" there will be no measurement of unit or force account items for Work defined in Section 8-01. If the Bid Proposal includes the Bid item "ESC Lead" the measurement is not deleted and the Work under that item will be measured as specified. (******) No measurement will be made for "Turbidity Curtain". (******) No measurement will be made for"Wetland Seeding" and "Upland Seeding". No measurement will be made for"Water Control". 5 1