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

ATTACHMENT A TO SECTION 01900 REVISIONS TO THE STANDARD PLANS AND SPECIFICATIONS The Contractor shall core drill, line di�ll or wall saw an opening to match the size of pipe to be inserted. Where line drilling is the method used, ihe drilled holes must be interconnected. Line drilling shali be accomptished by the use o( a smail core drill or a rotary hammer. Jackhammer shall not be used. All openings must p�ovide a minimum of 1 inch and a maximum of 2 inches clearance around the cir;umference of ihe pipe. Upstream pipes, except PVC pipe, penetrating ihe walls ot manholes shall be placed with the bell facing out such that the bell is placed snug against ihe outside wall of the structure as ihe angle of penetration allows. Pipe, excepl PVC pipe, leaving or entering manholes shall be provided w�th a flexible joint within �/z of a pipe diameter, or 12 inches, whichever is greater. All pipes except CMP and PVC pipe entering or leaving the manhole shall be provided with (lexible joints within Yt of a pipe diameter, or 12 inches, whichever is greater, from the outside (ace oi the manhole structure. The pipes shall be placed on firmly compacted bsdding, particularly within the area of the manhole excavation ihat normally is deeper than ihat of the sewer trench. Special care shall be taken to see that the openings ihrough which pipes enter the manhole are completely and tirmly rammed fuil of non-shrink grout to ensure water tighiness. PVC pipe connecting to manhole shall be provided with a manhole adapter complete with gasket and approved by the Resident Engineer. No pipe joint in PVC pipe shall be placed within 10' of ihe outside iace of the manhole. Furnish and Instaii Locking Solid Lid for Catch Basins Where shown in the Plans, new solid locking lids shall be turnished and installed on existing catch basins. The solid lids shall conform to Section 9-05.15 oi the Standard Speciiications and to City of Everett Standard Drawing 607. Solid round lids shall have "DRAIN" in 3-inch raised letters. CLEANING EXISTING DRAINAGE STRUCTURES Consiruction Requirements Section 7-07.3 is supplemented with the following: Prior to construction, the Coniractor and Resident Engineer shall inspect the existing vaults A and B, where shown on ihe Plans at the south end ot the South Parking Lot, for existing silt Ievel. At completion of ihe project ihe vaults shall be inspected again, and the Contractor shall remove any additional accumulation o( silt caused by construction operations. GENF.RAL PIPE INSTALLATION RE�UIREMENTS Construction Requirements Section 7-08.3 is supplemented with the toilowing: Recent work in the project area indicates signific=.nt amounis ot perched water may be encountered, depending on ihe type of soil in the localized work area. Where water is encountered in the trench, it shall be removed d�ring pipe-laying operations and ihe trench so maintained until the ends oi the pipe are sealed and provisions are made to prevent floating of ihe pipe. Trench water or other deleterious materials shall not be allowed to enter the pipe at any time. It shall be the Contractor's responsibility to furnisli, install, and operate all necessary machinery, appliances, and equipment to keep excavation� (ree from water during consiruction. Trenches � The second and third paragraphs of Section 7-08.3(1)A are deleted and replaced with the foliowing: - Capital Projects Commuter Rail Atlachment A to Section 01900 - 18 IFB No. RTA/CP 21-06 � Everett Station Phase 2REVISIONS TO THE STANDARD PLANS AND SPECIFICATIONSAddendum No.4