2400 33RD ST CONTRACT AGREEMENT 2016-01-01 MF Import

ATTACHMENT A TO SECTION 01900 REVISIONS TO THE STANDARD PLANS AND SPECIFICATIONS Prior to placing the grout, the contact surface shall be thoroughly cleaned, roughened and wetted with water. The grout shall be covered with burlap sacks afTer the initial concrete set and wetted at regular intervals until ihe required strength is obiained. DRAINAGE STRUCTURES, CULVERTS AND CONDUITS Manhole Ring and Cover Section 9-05.15(1) is supplemer.ted with ihe following: �Nhere lock-type castings are calied tor, the locking device shall be such that ihe cover may be readily reieased from the ring, and all movable parts shall be made oi non-corrosive metals and otherwise arranged :o avoid possible binding. A bituminous coating shall be applied to all surfaces of manhole rings and covers. The finished coatinp shall be continuous, smooth, neither brittle when cold nor sticky when exposed to the sun, and shall be stro��gly adherent to lh� castin�. WATER DIS�RIBUTION MATERIALS D�ictile Iron Pipe Section 9-30.1(1) is revised to read: Ductile iron pipe shall be cenlrifugally cast and meet ihe requirements o( AWWA C151. Ductile iran pipe shall have a cement-mortar lining meeting the requirements oi AWWA C104. Cement mortar linings shall be coated with a seal coat per AWWA C704. Ductile iron pipe shall be Standard Thickness Class 52. 2. Non-resirained joints shall be rubber gasket, p�sh•on type, or mechanical type meeting the requirements of AWWA C11 i. 3. Restrained joints shall be as specified in Restrained Joints o( these Specia! Provisions. Res+.rained Joints Section 9-30.2(6) is revised to read: Mechanical joint restraining devices shall be "Megalug" as manufactured by EBAA Iron Inc., or approved equal. Mechanical join; restraining devices shall be installed in strict adherence to the manu(acturers recommendstions. Gate Valves (3-inches to 16 inches) Section 930.3�1) is revised 10 reacl: Gate valves shall be ductile iron body, resilient wedge, non-rising stem s��ch� as th2 American Flow Con�rol "Walerous" 2500 series or approvt� aqual. Er�ds to be as speci(ied in the Standard Drawings. Operator sfems shall be equipped with 2" standard AWWA operating nut, with "O" ring stem seals. Valves must be of a type that has two "O" ring stem seals in the s;aHing box of ihe valve to (acilitate seal replacement without valve dismanUirg. Buttertly Vaives Section 9-30.3(3) is revi�ed by repl�cirg the second paragraph with the iollowing: Manual operators shall conform to AWWA C504. Manual operators shali be of the traveling nut, selt locking type, ar � shall be designed to hoid tha valve in any intermediate position between tully open and (ully closed without creeping or (lutter. Ope-stors shall be equipped with mechanical stop- Capitaf Projeots Commuter Rail Attachment A to Seci,�n 01900 - 33 IF8 No. R7A/C.P 21-06 � Everett Station Phase 2REVISIUNS TO THE STANDARD PlANS AND SPECIFICATIONSAddendum �;0.4