3702 TULALIP AVE 2016-01-01 MF Import

� SERS Public Sai 9-1-1 Communication Tower . P51 Report No. 704-05224-5 Uecember Z�, ZOOC Page 7 Water should not be allowed to collect in foundation excavations or on prepared subgrades of the construction area either during or after construction. Undercut or excavated areas should be sloped toward one corner to facilitate removal of any collected rainwater, groundwater, or surface runoff. Positive site drainage should be provided to reduce infiltration of surface water around the perimeter of the proposed construction. The grades should be sioped away from the proposed structures and surface drainage should be collected and discharged such that water is not permitted to infiltrate beneath the structures. Shouid excessive and uncontrolled amounts of seepage occur, the geotechnical engineer should be consulted. 5.2.2 Excavations/Slopes Temporary earth slopes may be cut near-vertical to heights of 4 feet. Excavations deeper than 4 feet should be performed in accordance with Department of Labor Occupational Safety and Health Administration (OSHA) guidelines. Permanent slopes shall be no steeper than 2 horizuntal to 1 vertical. Job site safety is the responsibility of the project contractor. In Federal Register, Volume 54, No. 209 (October 1989), the United States Departmeni of Labor, Occupational Safety and Heaith Administration (OSHA) amended its "Construction Standards for Excavations, 29 CFR, Part 1926, Subpart P. This document was issued to better insure the safety of personnel entering trenches or excavations. It is mandated by this federal regulation that excavations, whether they be utility trenches, basement excavations, or footing excavations, be constructed in accordance wilh lhe new OSHA guidelines. It is our understanding that these regulations are being strictly enforced and, if they are not c�osety followed, the owner and the contractor could be liable for substantia! penalties. The contractor is soleiy responsible for designing and constructing stable, temporary excavations and should shore, slope, or bench the sides of the excavations as required to maintain stability of both the excavation sides and bottom. The contractor's "responsible person", as defined in 29 CFR Part 1926, should evaivate the soil exposed in the excavations as part of the contractor's safety procedures. In no case should slope height, slope inclination, or excavation depth, including utility trench excavation depth, exceed those specified in local, state, and federal state regulations. We are providing this in(ormation solely as a service to our client. PSI does not assume responsibility for construction site safety or the contractor's or other parties' c�mpliance with local, state, and federal safety or otlier regulations. 5.3 Tower Foundation Support We understand that both a structural mat and drilled pier are being considered as foundation 2llernatives tor the proposed guyed taver Based on the soil conditions encountered, either alternative would be appropriate (rnm a geolechnical perspective. The final decision on which