Green construction is the future of construction, and with that in mind,keeping the environment in mind when excavating a site is essential. One of the main new practices in green excavation is the use of biodegradable fabric and/or synthetic material to control erosion and either promote the growth of the local ecosystem or be reused for another job later. This fabric is laid after excavation in an area is complete in order to keep it in place, reduce air pollution from the recently disturbed soil, and prevent erosion of the freshly graded area due to rain or other forces. Silt fence is also used and reused in order to prevent erosion of excavation sites maintain the project from water runoff. Also, once the excavation is relatively complete, quick growth seed or sod can be placed in order to quickly and environmentally consciously make the excavation remain in place and produce new life on site. Also, in dry areas that need moisture to better the excavation project, greywater can be used instead of potable water to wet the necessary areas effectively while conserving potable water for consumption. In order to retrievethis water, temporary ponds can be built to collect it so it is available for use. However, some areas receive too much rainwater and/or water from other sources, so excavations can be graded properly so water runs off naturally without the need for artificial aid. Rock and or vegetation can also be used to keep excavations in place without the need for harsh chemicals or artificial materials and in return also promote the environment naturally. All of these techniques are fall within the category of green excavation, however, it depends on the site at hand to choose which method(s) are best. Wet sites may require different techniques than drier sites, just as more permeable soil may require different preparations than that of a more non-permeable soil.
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