Laserfiche WebLink
� Valota Road 5-Lot Residential Development Decer$�B� - Page 131 <br /> � <br /> �� <br /> 4. The previously-overexcavated material can be re-used as f 11 provided that it is c�eared of <br /> ez�cess�ve quantities of arganics ax other potentially deleterzous rnaterials. The f 11 should <br /> be plac�d in moisture conditioned lifts not exceeding 8 znches in non-conapacted <br /> thickness. The fill should be compacted to a minimum of 90 percent of maximum dry <br /> density. <br /> 5. If fill is to be irriported for general use at the site, the fill should be c�arse gra.�ned (ASTM <br /> D 2487-Ob) with a plasticity index (ASTM D 431$-OS) of 15 or less. Proposed impor�ed <br /> soils should be evaluated by a representative of Earth Systems Pacific befare being <br /> transported to tl�e szte, az�d an azi intermittent basis during placement on the site. <br /> 6. In areas to be paved, the upper 8 incl�es of subgrade soil should be campacted to a <br /> minimum 90 percent of maximum dry density. The aggregate base courses should be <br /> compacted to a minimum 95 percent of maximun� dry density. The subgrade and base <br /> should be firm arad unyie�d'zng when proofrolled with heavy,r�zbber-tired equipment priar <br /> to paving. The pavez�z�ent subgrade soils should be periodically moFStened as necessary <br /> prior to placement of the aggregate base to znaintain t�e soil rnoisture content near <br /> opti�num. <br /> 7. Due to the fine-grained nature of t�ie upper soils, and depenc�ing on moisture conditions at <br /> the time of constructior�, there is a potential for the soils to become unstable during <br /> grading. Unstable sails hznder compactive effort ar�d are inappropriate for placement of <br /> additional �I�. Alterz�atzve� ta correct instability i�zclude aeration to dry the soils, �ime <br /> treatment, and the use o�gravel ox geotextiles as stabi�izing m.easures. Recommendations <br /> fox stabilizatipn should be provided by a representative of Eart� Systems Pacific, as <br /> needed, during const�ction. <br /> 8. Cut and fill slopes should rzot be steeper tharF 2:1, meas�xed k�orizontally to vertically. <br /> Foundations <br /> 1. Due to the presence of expansive soil on the site the proposed residences shonld be <br /> supported by either post-tensioned slabs or stru.ctural mat foundations. <br /> 2. �f a post-tensioned slab is to be utilized, the post-tensioned slab should be designed in <br /> accordance with tne provisions of the California Building Code and the r�cornrnendations <br /> of the Post-Tensioning Insti�ute. The following design criteria were based on <br /> 11 <br />