1999-09-02_GENERAL DOCUMENTS - C1981016 (2)

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i Site and material conditions are such that extremely dusty conditions may result from the excavation, hauling and deposition of topsoil materials. PROJECT MANAGER may require CONTRACTOR to implement dust control procedures throughout the Project Area for the duration of the Project. Such practices, such as applying water to work areas and roadways, are considered to be normal construction practices, and shall not result in additional expense to'OWNER. Measurement and Payment There will be no measurement for payment. Payment for this task will be reflected in a lump sum bid under Item 3 on the Bid Schedule. This lump sum bid will cover all costs for excavation and transportation of topsoil, distribution of topsoil at the Work Area and final grading and ripping of the topsoil excavation area. Additionally, payment shall include all costs necessary and incidental to dust control activities. Such payment shall be considered full compensation for all labor, materials, equipment and all other items necessary and .incidental to the excavation and placement of topsoil as directed and described in the specifications. Payment for this task will be made only for the amount bid under Item 3 of the Bid Schedule. Payment shall be as this task is completed and approved by the PROJECT MANAGER. TASK 4 SURFACE ROUGHENING Mulch Application After the topsoil is spread to a depth of eight inches (8") over the entire Work Area, two (2) tons of certified weed free mulch shall be applied to the soil surface. Mulch shall be provided by CONTRACTOR, and shall conform to Section 20.2 of the Revegetation Specifications, attached, except that all mulch shall be certified as noxious weed free or noxious weed seed free by any authorized State or County Officer. Documentation of certification shall be provided to the PROJECT MANAGER prior to application of mulch. The mulch shall be evenly distributed over the soil surface. Surface roughening will occur simultaneously with distribution of the weed free mulch in order to prevent loss of the mulch due to wind. Surface Roughening Severe surface roughening will follow topsoil distribution and mulch application. In order to accomplish the degree of severity of roughening required, the following will be accomplished by CONTRACTOR: Apply Topsoil; Apply two (2) tons per acre weed free mulch, simultaneously with slope scarification (below); - Scarify the surface by using a trackhoe bucket to gouge or pull the topsoil and mulch toward the machine in a manner such that no less than fifteen inches (15") of vertical relief is created. These gouges shall be sufficiently close so that no more than eighteen inches (18") exists between the crest of one gouge and the crest of an adjacent gouge, in any direction. Roughening in this manner will occur at all areas disturbed during reclamation construction, including the Work Area and the topsoil excavation area. Roughening of the channel footprint (Task 5, Channel Construction) need not be accomplished. 7