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c. Existing soil conditions throughout the parcel; and <br />d. Existing contour data for the entire property with vertical contour data <br />consistent with City standards for all areas to be disturbed by proposed tree <br />removal operations, extending for a distance of at least fifty feet beyond the <br />limits of such areas. Indicated elevations may be based on United States <br />Geological Survey data. <br />Subd. 4. Tree Preservation Barriers <br />a. All tree protection areas are recommended to be designated as such with "Tree <br />Save Area" signs posted in addition to the required protective fencing. Signs <br />requesting sub -contractor cooperation and compliance with tree protection <br />standards are recommend for site entrances. <br />b. Before any construction or grading takes place, snow fencing or erosion <br />control fencing shall be placed around the borders of woodlots at the dripline <br />of large trees to be preserved. Signs shall be placed along this fence line <br />prohibiting grading beyond the fence line. <br />c. These fences will be orange polyethylene laminar safety fencing or of woven <br />polyethylene fabric (silt fencing). <br />d. Passive forms of tree protection may be utilized to delineate tree save areas <br />outside of the MUSA line with approval of the City. These areas must be <br />completely surrounded with continuous rope or flagging (heavy mil - minimum <br />4" wide). "Keep Out" or "Tree Save" signage must accompany all passive tree <br />protection methods. <br />e. No construction shall begin until this work has been completed, inspected, and <br />accepted by the City. <br />f. Silt barriers or similarly effective erosion control barriers shall be required in <br />any area where erosion or siltation may cause damage to protected trees. <br />g. <br />All protective tree fencing, staking or continuous ribbon and all erosion control <br />barriers must be installed prior to and maintained throughout the land <br />disturbance and construction process, and should not be removed until <br />acceptable vegetation is established. <br />Subd. 5. Critical Root Zone. The root system within the dripline is <br />generally considered to be the critical root zone. To protect these critical root zones, a tree <br />protection area shall be established around each tree or group of trees to be retained. <br />