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All manholes and catch basins will be set plumb. All openings along the line of Stonn Sewer shall be' securely closed, as directed, and at the suspension of work at any time, suitable stoppers shall be placed to prevent earth or any substance trom entering the storm sewer. Ifwater is present in the trench, the seals shall remain in place until the trench is completely dry, Where pipe cannot be placed by open trench excavation, the method of placing and payment therefore shall be stated in the "Special Conditions" Section 100. 504.0 METHOD OF MEASUREMENT AND BASIS OF PAYMENT 504.1 PIPE IN PLACE Pipe shall be measured and laid by the lineal foot for each size and class regardless of the excavation depth. Elbows, tees, reducers, wyes, sections and connectors will be incidental to the pipe. 504.2 MANHOLES AND CATCH BASINS .j j 1 J I I J J .} J .1 Manholes will be measured ftom flowline to top of casting. Catch basins will be measured nom flowline of pipe to flowline of casting. 504.3 CASTINGS Castings shall be measured and paid by the unit price for each type of casting. 504.4 APRONS WITH TRASH GUARDS Aprons with trash guards shall be measured and paid by the unit for each size. 504.5 INSULATION Insulation shall be measured and paid by the linear foot in place including all labor and materials necessary. 504.6 BREAK INTO EXISTING MANHOLE Break into existing manhole shall be measured as a unit and paid for at the Contract Unit. Price. 504.7 REARRANGEMENT OF INPLACE FACILITIES The removal, relocation, extension, or adjustment of in-place facilities such as hydrants, valves, curb stops, pipe, etc., will be measured, as indicated in the Proposal, by the number of complete units of each item on a lump sum basis or by the number of linear feet of each item such as pipe. 500-5