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the new Silva Cell frames does not exceed the 3" (7.6 <br />cm) maximum. If removing frames (or base and posts) or <br />decks, re -install the geogrid along the new perimeter of <br />the Silva Cell system and backfill along the new limits of <br />excavation per Silva Cell specifications. <br />6.0 Trc;e Rc—iac-rnent <br />Tree replacement may be necessary based upon <br />unforeseen or severe site, climate or circumstantial <br />conditions. Limit disturbance area as possible. Ensure all <br />equipment meets H-20 loading requirements. <br />Remove any structure at the tree opening (tree grate, etc.) <br />Remove mulch and any excess soil from above tree root <br />package. Do not damage Silva Cell frames (or base <br />and posts) or clecks. Remove soil using hand tools only <br />or HydroVac and set aside. If hand dug, ensure clean <br />storage of soil material by excavating into contained/ <br />isolated location and cover during utility work. Soil roust <br />be inspected and approved prior to reinstallation. <br />Consult a certified arborist to remove tree. If necessary <br />to cut tree roots from main root package, do not cut Silva <br />Cell It (or base and posts) or decks. Remove tree <br />root package from planting bed. If using construction <br />equil:rrnent to remove tree, ensure meeting of H-20 <br />loading requirements. <br />Prior to planting new tree, install additional planting soil, <br />to the depths indicated, within the tree opening adjacent <br />to paving supported by Silva Cells. Assure that the <br />planting soil under the tree root package is compacted to <br />approximately 85-90% to prevent settlement of the root <br />package. The planting soil within the tree opening shall <br />be the same soil as in the adjacent Silva Cells. See Silva <br />Cell specifications for further detail. Replace root barrier. <br />Plant tree according to owner specifications or at <br />the direction of consulting arborist. Cover the planting <br />soil finished grade with 2" (5crn; of mulch per Silva <br />Cell specifications. <br />When a large portion of a Silva Cell installation is to <br />be removed, first locate the area of disturbance. Limit <br />disturbance area as possible. Ensure all equipment meets <br />H-20 loading requirements. <br />Remove paving and aggregate base course. Carefully cut <br />geotextile to allow for removal of Cell decks. Ensure at <br />least 18" (45.7 cm) overlap into new limits of excavation. <br />Do not cut Silva Cell frames or decks. Unfold geogrid <br />from Cell decks and carefully fold away from Silva Cell <br />frames (or base and posts). Remove Silva Cell decks <br />by removing screws and set aside. Remove soil using <br />hand tools only or HydroVac and set aside. If hand dug, <br />ensure clean storage of soil material by excavating into <br />contained/isolated location and cover during utility work. <br />Soil must be inspected and approved prior to reinstallation <br />Remove anchoring spikes from Cell base and set aside. If <br />geotextile is at base of system, carefully cut geotextile at <br />least 6" (15.2 cm) within new limits of excavation. <br />Install aggregate base course and paving, ensuring no <br />damage to Silva Cells or other installation components. <br />J ,' tr ;n I _ ' 1 to b _ ,. l.; i_ai led 1�`,d;ac'r' <br />Exis ino Insta iatic <br />When additional Silva Cells are to be installed adjacent <br />to an existing Silva Cell system, first locate the area of <br />disturbance. Limit disturbance area as possible. Ensure all <br />equipment meets H-20 loading requirements. <br />Excavate up to 12" (30.5 cm) from existing Silva Cells. <br />Excavated remaining 12" (30.5 cm) by hand. Cut geogrid <br />from face of existing Silva Cell system. Do not cut Silva <br />Cell frames (or base and posts) or decks. <br />Silva Cell Operation and Maintenance Manual <br />