Thomco Construction Inc. 6/14/2021

I CITY OF EVERETT SPECIAL PROVISIONS DIVISION 7 — DRAINAGE STRUCTURES, STORM SEWERS, SANITARY SEWERS, WATER MAINS, AND CONDUITS 7-08 GENERAL PIPE INSTALLATION REQUIREMENTS ' 7-08.1 Description Further supplement 7-08.1 as follows: 7-08.1(1) Submittals Provide Type 2 Working Drawings for all materials and Standard Plans. Provide Type 3E Working Drawings for dewatering plans, if any. 7-08.2 Materials Delete material items listed in 7-08.2 and substitute the following: Provide materials meeting the following requirements: Foundation Material Class A or B 9-03.17 Standard Specifications Gravel Borrow 9-03.14(1) Standard Specifications Controlled Density Fill 2-09.3(1)E Special Provisions Crushed Surfacing Base Course 9-03.9(3) Standard Specifications 7-08.3 Construction Requirements 7-08.3(1) Excavation and Preparation of Trench 7-08.3(1)A Trenches Revise the second paragraph in 7-08.3(1)A and to read as follows: Excavate trench in accordance with COE Standard Drawing No 614. Delete the second sentence in the third paragraph in 7-08.3(1)A and substitute the following: Contractor may excavate above the top of the pipe zone only as wide as necessary to meet OSHA requirements. 7-08.3(1)C Bedding the Pipe Delete the second and third paragraphs in 7-08.3(1)C and substitute the following: Provide pipe zone bedding in accordance with COE Standard Drawing 614 and I 615. If the Engineer determines the material existing in the trench bottom is satisfactory for bedding the pipe, then the bedding material specified in the COE Standard Drawing 615 is not required, provided the existing material is loosened, regraded, and compacted to form a dense, unyielding base. Supplement 7-08.3(1) by adding the following: 7-08.3(1)D Trench Dewatering This section specifies the definition, responsibilities and execution for dewatering associated with trench excavation for pipes, manholes, catch basins, cleanouts, side sewers and other buried utility work. Implement trench dewatering measures where necessary or directed by the Engineer. Implementation shall include, but not be limited to, the design, furnishing, installation, operation, maintenance, monitoring, reporting and removal of dewatering systems to achieve proper completion of Work performed under this Contract. Prevent the flow of surface water runoff into the trench excavation. Control surface ' water and other erosion control measures associated the Work in accordance with 8-01 of the Standard Specifications and modified in these Special Provisions. Water Main Replacement"V" Division 7—STORM,SEWER,WATER April,2021 ' WO No.—UP3730 SP—169