Walsh Construction Company II LLC 6/7/2021

I a. 24"diameter: single lap welded joint b. 30"and larger diameter: double lap welded joint c. Butt strap joints as indicated on the plans SECTION 33 16 10, PRESTRESSED CONCRETE WATER UTILITY STORAGE RESERVOIR ' Add the following paragraph: 2.10 PVC Liner ' A. Furnish and install a water-tight PVC liner below the reservoir foundation slab as shown on the Drawings. ' B. The liner shall be constructed by an agency with sufficient demonstrated experienced with typical impermeable liner installation. Submit experience history upon ENGINEER request. C. The liner shall have the following minimum characteristics. ' 1. Thickness: 30 mils 2. Tensile Strength at Break: 73 lbs/in 3. Elongation at Break: 380% ' D. Manufacturer 1. AccuGeo; or approved equal VOLUME 2, DIVISION 40 — PROCESS INTEGRATION SECTION 40 05 57, ACTUATORS FOR PROCESS VALVES AND GATES ' Replace paragraph 2.1, B with the following: D. Electric Motor Valve Actuators — Where specified in the contract documents, an electric valve actuator shall operate the valve. Electric valve actuator service shall be open-close. The actuator shall include gearing position and torque limiting switches mounted in a NEMA 4 enclosure. An auxiliary handwheel shall be provided to enable operation in the event of emergency. The operator shall be of sufficient size and torque to open and close the valve under full unbalanced pressure and to properly seat the valve. The motor shall be specifically designed for valve actuator service and shall be of low inertia high starting torque, totally enclosed, non-ventilated construction. Motor insulation shall be Class F. ' The actuator shall have three push-button control switches (0/S/C), a selector switch (L/O/R), a positioner, a 4-20 mA DC input, a 4-20 mA output for valve position, and a mechanical dial position indicator. The unit shall include reversing starters and ' Addendum 5 Page 3 CITY OF EVERETT • 3200 Cedar Street • Everett, WA 98201 • (425) 257-8800 • Fax (425) 257-8882