Site work for a water / sewer project in Lakewood, Washington. Completed plans call for site work for a water / sewer project.

Production Well G-4 Installation and Testing Work to be performed includes: Lakewood Water District (Owner) desires to drill, construct, and test a new production well at its Scotts Wellfield located in Lakewood, Washington (Figure 1). The project will be contracted and managed by the Owner. Mott MacDonald will be the project geologist (Geologist) and will represent the Owner with the drilling, design, construction, development, and testing of the well. The Owner will provide access to the site prior to mobilization. The Owner shall be responsible for site preparation, disposal of drill cuttings, and water disposal. Drilling water will be provided onsite via a standard garden-hose fitting at one of the nearby well houses. Drilling will be completed using either cable-tool or reverse-circulation mud rotary methods to complete the exploratory drilling to a depth of approximately 600 feet. The selected well drilling contractor (Contractor) shall furnish all labor, equipment, and material necessary to construct and test the new well in accordance with these Specifications. The Contractor will complete either bid Schedule A for cable-tool methods or bid Schedule B for rotary methods. Under Schedule A, the Contractor will be responsible for drilling a minimum 16-inch-diameter casing to the target depth of 600 feet, with the final depth determined by the Geologist. Initial drilling will be with 24-inch casing to at least 200 feet, 20-inch casing drilled to a depth of approximately 320 feet, and 16-inch casing drilled to a total depth of about 600 feet. A continuous aquifer seal will be installed in the annular space between the 16-inch and 20-inch casings as the 20-inch casing is withdrawn from the borehole. A permanent seal will then be installed between the 20-inch casing and the 24-inch casing as the 24-inch casing is removed. The screen design, diameter, length, and slot size will be determined based on field conditions by the Geologist and the District. The screen design will likely include a sand pack but may be completed with natural formation material around the screen if aquifer conditions allow. Under Schedule B, the Contractor will be responsible for drilling a minimum 16-inch-diameter borehole to the target depth of 600 feet, with the final depth determined by the Geologist. Initial drilling will use rotary methods to drill a boring to install a 24-inch-diameter casing to approximately 200 feet, a 20-inch borehole drilled to install a 16-inch casing to a depth of 320 feet, and a 16-inch-diameter boring to a total depth of about 600 feet. A continuous aquifer seal will be installed in the annular space between the 20-inch borehole and the 16-inch casing up to 200 feet and then between 20-inch borehole and 24-inch casing as the 24-inch casing is withdrawn from the borehole. This will seal the well through the shallow Aquifers A3 and C, meeting the requirements of WAC 173-160-181 and 173-160-241. The screen design, diameter, length, and slot size will be determined based on field conditions by the Geologist and the District. The screen design will likely include a sand pack but may be completed with natural formation material around the screen if aquifer conditions allow. The proposed new well location is in an operating wellfield with three wells (Figure 1). Two wells are less than 200 feet deep; the third well is approximately 900 feet deep. A representative well log is attached. The aquifer is highly transmissive, and the Owner is concerned about introducing turbidity while drilling through the shallow aquifer. The wellfield will not be in use while penetrating this aquifer, but the Contractor should make every effort to minimize turbidity during drilling of the aquifer zone. The Contractor shall take precautions to prevent contamination from accidental spills of motor fuel, oil, grease, solvents, or other potential contaminants. The Contractor shall protect the surface and underground infrastructure along access routes and the well site and shall maintain clean sites and control litter during all phases of construction and testing. The wellfield is fenced, and the Contractor shall conform to site security measures established by the District. All work and materials shall conform to Washington Administrative Code (WAC) Chapter 173-160, Minimum Standards for the Construction of Wells. Questions concerning this request for bids may be directed to: Shukri Sharabi, PE, LWD Project Manager Lakewood Water District Email: ssharabi@lakewoodwater.org Telephone: 253-588-4423 Burt Clothier, Project Manager Pacific Groundwater Group Telephone: 360-413-1520 Email: Burt@pgwg.com By G. Barton, Secretary Lakewood Water District Board of Commissioners