2008-213 - Laserfiche WebLink

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A radio communication, Remote Telemetry Unit (RTU) , complete with antenna and all data acquisition and control components, shall be supplied with the pump control system. The RTU shall be capable of acquiring analog and discrete data for transmission to the Central Telemetry Unit (CTU) ; The RTU shall also be capable of receiving instructions from the CTU for the operation of the pumps. 2 . 10 ACCESS COVERS A. The wet well shall be furnished with a single leaf, and valve vault with a double leaf, hinged, aluminum access cover, with recessed key wrench lock and stainless steel accessories . The wet well cover frame shall be placed and securely mounted above the pumps with stainless steel guide bar brackets accurately aligned. The frame shall be equipped with safety handles to maintain the door in an open position. The covers shall be fabricated from checkered plate aluminum sheet and shall be designed to withstand 300 psf loading. The valve pit access cover shall be identical in construction to the wet well access cover, except that it shall be a double leaf cover of larger opening size. Access covers shall be Bilco JD, or approved equal . Minimum size of the wet well opening shall be 446ot by 3 -foot; adequate to accommodate the two (2) pumps as shown on the Drawings . The stainless steel upper guide rail holder and a stainless steel level sensor cable holder shall be mounted to the frame of the wet well access cover. 2 . 10 MISCELLANEOUS CONCRETE A. All miscellaneous concrete pours shall have a design mix with a 28-day compressive strength of 3 ,500 pounds per square inch, and shall comply in all respects with the requirements of Division 03 of these specifications. B. Concrete used for tremie pours shall have the same design mix as miscellaneous concrete, except that the following admixtures shall be included in the mix: 1 . High-Range Water Reducing Admixture shall be incorporated into the design mix to provide enhanced: water reduction; high slump retention; high flowability; and self compacting properties. The admixture shall be based on polycarboxylate chemistry and shall be as manufactured by "Master Builders Technologies", Glenium 3030 NS , or approved equal. 2 . Anti-Washout Admixture shall be incorporated into the design mix to provide washout and segregation resistance. The admixture shall be based on liquid cellulose chemistry and shall be as manufactured by `BASF", Rheomac UW450, or approved equal. i C. Admixtures shall be incorporated into the design mix in accordance with manufacturer' s recommendations. Concrete supplier shall confirm compatability with any other admixtures to be used in the design mix. 2. 11 REINFORCING STEEL A. All reinforcing steel shall be grade 60 , and shall comply in all respects with the requirements of Division 03 of these specifications. 2. 12 PRECAST CONCRETE WET WELL SECTIONS 02539-8 02539 — Submersible Pump Station (Rev.) -