2025-03-11-minutes-solid-waste-and-maintenance

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Monitoring Well H8 Plans and Specifications Kittlta3 COurlty Solid Waato 2.3.5 Backfill Materials Backfill materials prior to installation of the well shall consist of either hydrated bentonite chips or silica sand filter pack, or other materials approved by the GEOLOGIST (I.e. pea gravel if voids are encountered). Installation of backfill prior to insertion of the well shall be billed at the backfilling unit price as detailed in Section 4. The protective casing serving as the aboveground monument shall be new, minimum 4.5 foot long, 6-inch diameter -schedule 40 Grade 8, seamless, rust -free, carbon steel pipe per ASTM A53 standard, and shall be completed with a lockable steel cap and casing, which shall be approved by the GEOLOGIST. The protective casing shall be painted with a high visible paint, In accordance with the manufacturer's recommendations, which matches the existing casing as the site or recommended by the OWNER. CONTRACTOR shall paint well monuments prior to installation. No painting at the drill site shall be allowed. The monument shall be cemented in place with a small cement pad surrounding the monument In accordance with Chapter 173-160 WAC. 2-3.7 Protective Bollards Protective bollards shall be a minimum 3-inch-diameter steel pipe and at least 4.5 feet long. and shall be painted with a high visible paint, in accordance with the manufacturer's recommendations, which matches the existing bollards at the site or recommended bythe OWNER. CONTRACTOR shall paint bollards prior to installation. No painting at the drill site shall be allowed. 2.3.8 Cement The monument and protective bollards shall be cemented in place using high strength cement (ability to withstand approximately 4,000 pounds per square inch). 2.4 Well Construction The design dimensions for approximate well completion are shown on the Plans and Table 1. The well shall be constructed in accordance with Chapter 173-160 WAG, Minimum Standards for Construction and Maintenance of Wells. Specific construction procedures are described in the following sections. Installation of backfill prior to insertion of the well shall be billed at the backfilling unit price as detailed In Section 4. Construction of the well screen, pack surrounding the screen, hentonite seal, and riser shall be billed at the well construction unit price as detailed in Section 4. The above -ground monument and bollards will be billed as a lump sum unit price. All depths of backfill and borehole bottoms shall be confirmed by the CONTRACTOR by physical tagging prior to and during placement of backfill, pack, and seal materials. Once final drilling depth is achieved, the CONTRACTOR will discuss the well assembly dimensions with the GEOLOGIST. The well assembly consists of PVC screen and riser pipe. The well screen and riser pipe shall be schedule 80 PVC, as shown on Sheet A-3 and noted in Section 2.3.2 and 2.3.3 The well assembly is anticipated to have a minimum of 20 feet of well screen. 12 February 2025 1 553.1763•010