Payment

(1) Dewatering during excavation and construc­tion. Payment for furnishing all designs and engineer­ing data, plant, labor, equipment, material, and appur­tenances and for performing all operations in connec­tion with designing, furnishing, installing, operating, and maintaining the dewatering system until the work in the area is completed and accepted will be made at the applicable contract lump sum price for “Dewater­ing A-l Test Stand Area, Deep Wells,” and “Dewater­ing A-l Test Stand Area, Except for Deep Wells.” Twenty-five percent of the contract price for each item will be paid upon completion of the installation of the dewatering system for the excavation. A second 25 percent of the contract price for each item will be paid upon satisfactory completion of 80 percent of the esti­mated excavation quantity. A third 25 percent of the contract price for each item will be paid upon satisfac­tory completion of 100 percent of the required excava­tion. Fifteen percent of the contract price for each item will be paid when final acceptance of all work in the excavation is made. The remaining 10 percent of the contract price for each item will be paid after writ­ten notice to cease dewatering operations has been is­sued and final cleanup and final acceptance of all work has been made.

(2) Maintaining area in dewatered condition. Pay­ment for furnishing all plant, labor, equipment, and material and for performing all operations in connec­tion with maintaining the accepted excavations in a dewatered condition will be made at the applicable contract unit price per calendar day for “Maintaining A-l Test Stand Excavation in Dewatered Condition.” No payment will be made for this item for periods, measured to nearest hour, during which the dewater­ing system is not operated and maintained as specified hereinbefore.

(3) Removal of systems. Payment for furnishing all plant, labor, equipment, and material and for per­forming all operations in connection with removal of

the dewatering system will be made at the applicable contract lump sum price for “Removal of A-l Test Stand Dewatering System.” However, if the Contrac­tor so elects to sell the installed and operating system to the succeeding Contractor or to dispose of the sys­tem in place by other means, as approved by the Con­tracting Officer, the Contractor shall be relieved from the requirements of the specified removal work and no payment will be made for this item.