WORK PLANS - Laserfiche WebLink

Home Browse Search

PLANTING TREES IN ALDEN PARK Purpose The purpose of this task is to make the park more attractive and replace trees that have died. We will plant six new trees in Alden Park, chosen by a landscaper from the following list: o Liquid Amber* o Ghinko (male variety) * o Russian olive o Baily Acacia o Melia Azadirac o Saucer Magnolia These trees were carefully chosen with the help of plant specialists from UC Berkeley and Chevron. They were chosen to be compatible with the climate and soil conditions in the Tracy area and to add the most value to the park. The precise locations for the trees will be chosen by a landscaper working closely with the City of Tracy. However, the trees will not be located in the northeast, southwest or perimeter of the park as shown on Plate 8 . Some of these areas may be needed for installation of a site cleanup system or seep collection vaults (see next section) . Also, much of the area on the northeast side of the park should be preserved for public activities that require the large, open spaces. Planting Design The trees will be planted with a "flower pot" design to ensure their successful growth over the buried concrete slab in the park (see Plate 9) . A small excavation will be made, lined with concrete and filled with topsoil. In addition, a casing will be installed from the bottom of the excavation through the concrete slab to a depth of 15 feet below grade. The purpose of the pot is to keep the tree roots from reaching oily dirt in the formation, possibly stressing the roots by limiting their oxygen. The casing, also filled with topsoil, will ensure proper drainage and allow unimpeded growth of deeper roots. The following procedure will be followed to install each of the new trees: o General procedures given earlier will be followed. o Casing. A 24-inch diameter casing will be installed from the surface to 15 feet below grade and filled with soil . The hole through the slab will not be sealed around the casing. * Liquid Amber and Ghinko are on a list of trees preferred by the City of Tracy, therefore they will be planted if available. If they are not available we will seek approval from the city for planting trees from the other four choices. 8