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City of Everett 01 12 16 - 4 <br />Port Gardner Storage Facility - Facility Construction Package WO# UP-3525 <br /> <br /> <br />01 12 16 - 4 WORK SEQUENCE <br />2. DEWATERING WATER TREATMENT AND COST SHARING <br />a. In accordance with Section 31 23 19 Dewatering, the Contractor’s work shall <br />include methods for lowering or controlling groundwater, including the <br />treatment and disposal of dewatering water. Treatment of dewatering water <br />shall comply with the Ecology issued Construction Stormwater General Permit <br />and Companion Order prior to any discharging any dewatering water through <br />Deepwater Outfall 100. <br />b. The schedule and duration of dewatering water treatment may coincide with <br />the West Marine View Drive Conveyance Improvements, two concurrent City <br />Public Works contracts for conveyance improvements along West Marine <br />View Drive and Lower Norton Ave. The parallel contracts may include <br />treatment of dewatering water and discharge to Deepwater Outfall 100. The <br />Contractor shall share and coordinate discharge point hookups to the <br />Deepwater Outfall 100 when so requested. The Contractor shall coordinate <br />with the Owner and Owner’s Representatives to establish a structure for cost <br />sharing of the groundwater treatment system with the West Marine View Drive <br />Conveyance Improvement contracts when so requested. This cost sharing <br />shall minimize the need for the PGSF and West Marine View Drive <br />conveyance contracts to mobilize, operate, and demobilize independent <br />treatment systems. Examples of cost sharing may include simultaneous <br />treatment of dewatering water for both contracts or a reassignment of leased <br />equipment agreements between projects to minimize equipment mobilization <br />and demobilization fees. Simultaneous use by the parallel contracts shall also <br />be considered by the Owner and Owner’s Representatives that may result in <br />operational cost sharing, and potential upsizing of groundwater treatment <br />system. <br />c. Section 31 23 19 2.03 Dewatering Treatment and Disposal System Work Plan <br />shall include documentation of dewatering treatment cost sharing terms <br />negotiated with Owner and Owner’s Representative. <br />3. Archaeological monitoring <br />a. Any project related excavations that will produce visible spoils and will extend <br />deeper than 15 feet below ground surface require archaeological monitoring. <br />Installation of sheet piling and cement soil column or secant pile walls are <br />excluded from archaeological monitoring as they will not produce visible spoils <br />for inspection. <br />b. Durations of archaeological monitoring will be based on the Contractor’s <br />schedule developed under Section 01 32 16 Construction Progress Schedule. <br />The Contractor must notify the Owner at a minimum of two weeks prior to <br />starting excavation work that will penetrate the ground up to or beyond a depth <br />of 15 feet. <br />c. The Snoqualmie Tribe Cultural Resource Compliance Monitoring Manager <br />must be contacted at least seven days prior to ground disturbing activities. <br />Tribal representatives must be granted site access and the opportunity to <br />witness ground disturbing activities related to this project. The Tribe’s <br />Monitoring Manager can be contacted as follows: <br />Adam Osbekoff <br />425.292.0249 <br />adam@snoqualmietribe.us