Thomco Construction Inc. 6/14/2021

' CITY OF EVERETT SPECIAL PROVISIONS ' On mains exceeding 1,200 feet, provide for sample collection at one of the water services shown on the Plans. If no water services are shown on the Plans, provide 3/4-inch sampling tap at appropriate locations along the main. ' For mid-line service taps not providing future customer service, plumb into dead- end meter setters and meter boxes at the street or sidewalk edge for use as future dedicated sampling locations in accordance with COE Standard Drawing No. 526. ' Locate sample tap upstream of the flushing hose connection for bacterial and disinfectant residual sampling. Due to sanitary and representative sampling issues, use only installed sample taps for collection of free chlorine or bacteriological ' samples. 7-09.3(24)J Repetition of Flushing and Testing Should the initial disinfection procedure result in an unsatisfactory bacteriological test, meaning total coliform bacteria is present, repeat the entire flushing and disinfection procedure until obtaining satisfactory test results. Unsatisfactory test results indicates Contractor's failure to keep the pipe, sample taps, and temporary filling attachments clean during construction, or to properly flush and disinfect the main. Supplement 7-09.3 by adding the following: 7-09.3(25) Mechanical Joint Restraining Devices (******) ' Restrain joints at bends, tees, dead ends and connections to existing water mains as shown on the Plans using mechanical joint restraining devices. Install joint restraint system in accordance with the manufacturer's recommendations. ' 7-09.4 Measurement Delete all paragraphs of 7-09.4 and substitute the following: Bid items of Work completed pursuant to the Contract Documents will be measured as described in Division B — Bid Item Descriptions of these Special Provisions and Section 1-09 MEASUREMENT AND PAYMENT of the Standard Specifications. 7-09.5 Payment Delete all paragraphs of 7-09.5 and substitute the following: Payment for bid items of Work completed pursuant to the Contract Documents will be as described in Division B — Bid Item Descriptions of these Special Provisions and Section 1-09 MEASUREMENT AND PAYMENT of the Standard Specifications. 7-12 VALVES FOR WATER MAINS 7-12.1 Description Supplement 7-12.1 as follows: ' 7-12.1(1) Submittals (******) Provide Type 2 Working Drawings for all materials and Standard Plans. ' 7-12.2 Materials Delete the first paragraph in 7-12.2 and substitute the following Provide materials meeting the requirements of the following: ' Gate Valves (2-inches to 12-inches) 9-30.3(1) Special Provisions Valve Boxes 9-30.3(4) Special Provisions Valve Stem Extensions 9-30.3(6) Special Provisions ' Tapping Sleeve and Valve 9-30.3(8) Special Provisions Water Main Replacement"V" Division 7—STORM,SEWER,WATER April, 2021 WO No.—UP3730 SP—179 ADDENDUM#1