Backfilling. i. Backfill shall be non-clumped native material from the excavated hole free of roots, rocks 2 inches or greater in diameter, subsoil, debris, weeds, and foreign matter. These materials shall be disposed of at the Proposer’s expense. Backfilling shall begin as soon as tree is placed in hole. This is particularly critical for bare root trees to prevent roots from drying out. Proposer shall firm the soil near the base, so the root ball is adequately supported. Proposer shall gently work backfill around and beneath the roots, so no air pockets remain. For bare root trees or trees with voids from removed nursery stakes, backfill shall be worked in between the roots by hand to avoid damaging roots. Proposer shall continue to monitor the trunk for straightness throughout the backfill process and alternate adding backfill material and tamping lightly until backfill material is level with the root flare. Any voids, including those from nursery stakes removed, shall be filled with soil. ii. Final soil level shall match grade of surrounding ground. If planted in a concrete cut-out or planting strip less than 4 feet wide, final soil level shall match the soil grade level of below the adjacent sidewalk, but never more than 4 inches lower than the sidewalk surface grade. iii. Proposer is responsible to supply additional backfill material if needed, to meet grade. If multiple trees are planted at one site, excess soil from one excavation may be used to backfill other tree holes at that site. Additional material shall be topsoil and consist of friable surface soil reasonably free of grass, roots, weeds, sticks, stones, or other foreign materials. The topsoil shall consist of ▇▇▇▇▇ loam, with soil particles within the following percentages: clay; 0-25; silt; 25-50; sand; 50-70; decomposed organic matter; 5-10. iv. Any excess backfill materials shall be incorporated into berms (see Basin Construction below) to a reasonable extent. Any remaining excess soil and rocks 2 inches and greater in diameter shall be removed from the site and disposed of in a proper manner by Proposer at the Proposer’s expense.
Appears in 4 contracts
Sources: Price Agreement for Tree Procurement, Planting, and Maintenance Services, Price Agreement, Price Agreement