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ZN�nng Propertp 9J-II-lO <br /> Ererett, ll�aslriwglnu <br /> 4.9 Drivewav Desien and Construction Considerations <br /> Areas underneath the proposed driveway prism should be prepared as outlined in <br /> Section 4.2 of this report prior to placement of structural fill and surfacing materials. <br /> After striping any existing fill, topsoil, organic or otherwise deleterious mat�erials, <br /> the subgrade should be proof-rolled to obtain a suitablc firm and non-yielding <br /> ground surface prior to placing fill or surfacing materials. <br /> We recommend that the followir�g minimum surfacing depths be used: <br /> 2.0 inches Class "B"Asphalt Concrete Paven:ent (ACP) <br /> 3.0 inches Cf7rshed S:ufacing Top Coruse (CSTCJ <br /> or <br /> 4.0 inches Concrete Puvement <br /> 3.0 inches C�7�shedSu�,facing Top Corrrse (CSTC) <br /> Any fill required between the subgrade and the CSTC shall meet the grading and <br /> � density requirements as stated in Section 43 of this report. <br /> 4.10 _Rockerv Desi�n Recommenda6ons <br /> A rockery is not a retaining wall. It is an erosion control device. Failure of a <br /> , rockery could occur if it is treated as a retaining wall. Fill and/or cut soil behind a <br /> rockery must be self-supporting or potential movement and failure of the rockery <br /> , � 3 GES, Inc. <br />