2505 PACIFIC AVE 2018-01-01 MF Import

Sierra Construction Services , Inc. JN 92276 July 1 , 1992 Page 9 recommend using Supac SNP, manufactured by Phillips Petroleum Compaiiy: or a non-woven fabric with equivalent strength and permeability characteristics. The subgrade should be evaluated by Geotech Consultants, Inc. after the site is stripped and cut to grade. Recommendations ' for compaction of structural fill beneath pavements are given in a later sub-section e�titled GENERAL EARTHWORK AND $TRUCTURAL FILL. The performance of site pavements is ' directlY related to the strength and stability of the underlying subgrade. The pavement section for lightl y-losded traffic and parking arees should consist of two (2) inches of asphalt concrete (AC) over four (4) inches of crushed rock base (CRB) or three (3) inches of asphalt treated bese (ATB) . We recommend thet heavily-loaded areas be provided with three (3) inches of AC over stx (6) inches of CRB or four (4) inches of ATB. The heavily loaded areas are typically mai � driveways, dumpster . ereas , loading docks, or areas where truck traffic occurs , especially wherc trucks often turn. The pavement section recommendations and guidelines presented in this report are based on our experience in the area and on whet has beer, successful in similar situations . Some maintenance and repair of limited areas can be expected. To provide for a design without the need for any repair Mould be � uneconomical . j EXCAVATIONS AND SLOPES In no case should excavation slopes be greater than the limits specified i � local , state, and national government safety regulations. Temporary cuts to a depth of about four (4) feet in unsaturated soils may be ettempted verticelly. Besed upon Washington Administrative Code (wAC) 296 , Part N, the soil type at the site would be clessified as Type e, and therefore I slopes greater than four (4) feet cannot be excavated steeper than 1 : 1 (Horizontal :Vertical ) extending continuously between the top and bottom of the cut. The ebove recommended temporary slope inclination is based on what has been successful at other sites having similar soil conditions . 7emporary cuts are those that will remain unsupported for a relatively short duration to allow construction of foundations , retaining walls , or utilities . � These cut slopes should be backfilled or retained as soon as i GEOTECH CONSULTANTS , INC.