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•. 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 cutting of the CMP riser, offsite disposal of the excess CMP material, excavation of the embankment, form construction, purchase and installation of the bentonite, purchase and installation of the concrete, backfilling and compaction over the concrete, construction and installation of the hinged steel grate. Payment shall be as this task is completed and approved by the PROJECT MANAGER. Such payment shall be considered full compensation for all labor, materials, equipment and all other items necessary and incidental to the completion of Task 3, Sediment Pond Dewatering Device Repair. Task 4 Sealing Sediment Pond In order to minimize the infiltration of water from the sediment pond, bentonite will be placed within the pond. Bentonite shall be placed on the base of the pond and up the side slopes to the elevation of the lowest inlet of the CMP riser. The area of the pond to be affected by this Task is estimated to be fifteen feet (15') in width, three hundred feet (300') in length and about three feet (3') in depth. CONTRACTOR shall ensure that the pond is free of water prior to initiating this Task. Upon completion of dewatering, if necessary, CONTRACTOR shall stake the elevation of the side slopes of the pond at the elevation of the lower most inlet to the CMP riser. In order to ensure that the proper elevation is established, the use of a tripod mounted surveyors level is required. The surface area of the pond to be affected by this Task shall be scarified to a depth of four inches (4") through the use of a disc harrow. Two inches (2") of dry bentonite shall be placed on the prepared work area after the discing is completed. This material will be worked into the base and side slopes of the pond by discing the affected area until the bentonite is well incorporated into the scarified surface. Measurement and Payment There will be no measurement for payment. Payment for this task will be reflected in a lump sum bid under Item 4 on the Bid Schedule. This lump sum bid will cover all costs for identifying the area to be affected by this Task, preparation of the area, and purchase and installation of the bentonite materials. Payment shall be as this task is completed and approved by the PROJECT MANAGER. Such payment shall be considered full compensation for all labor, materials, equipment and all other items necessary and incidental to the completion of Task 4,Sealing Sediment. Task 5 Equipment Rental ' Areas in and adjacent to the Project Area may require slope reduction, excavation or erosion control work. CAT 416B Backhoe loader or equivalent 74 fhp machine with operator and a five (5) cubic yard onloff highway end dump truck with operator shall be furnished for additional work as needed. Additional rip rap materials may be needed to armor areas outside the rolled dip, and low water crossings. It is estimated that up to twenty cubic yards (20 yd ~) additional rip rap material may be required. Of this, ten cubic yards (10 yd 3) must consist oftwo-inch (2") screened rock, and ten cubic yards (10 yd 3) must consist of clean four inch (4") rock. The use of the rip rap material is NOT guaranteed. The hours outlined in Item 5 of the Bid Schedule are NOT guaranteed. All work will be accomplished according to Specification 19.0, Equipment Rental, attached. Measurement and Payment Measurement and payment will be made as per Specification 19.0, Equipment Rental, which is attached. Payment will be made at the unit prices established in Item 5 of the Bid Schedule. The hours outlined in Item 5 of the Bid Schedule are NOT guaranteed. Rip Rap will be paid by the cubic yard installed at the unit price bid in Item 5 of the Bid Schedule. The use of the additional rip rap material is NOT guaranteed.