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s) T7ie outfall for the bia-rete�tian basins sha11 release#he disr.�arge <br /> near the base of the seasonal creek and shall not be allowed to flow <br /> over the tap of th�creek banks, <br /> t) Cut-offplugs consisting of cantrolle�density fill$bout 2�t wide <br /> and keyed urta the native soils s3�a11 be installe�at 25-to 50-�cwt <br /> int�vals along all pipeline lrenches ancE at the b�g�ning,midpoints, <br /> and�nds of the culvert and a113b-inch diameter det�ntian pipes. <br /> Specific recomm�dataons for the cut offpluge ahali be preseat�in <br /> the design-Ievel geatechnical report. <br /> u) All propased structures shall be designed in accordance�rith the <br /> sei�uc desiga eriteria of the 20 f 0 Galifarnia Buj1d#ng Code(CBG� <br /> or other recent applicabie building coda. <br /> v} Gtixt areas ir►serpenrinitc and exposed fill slopes compose�af <br /> serpentinite rock shal�be capped wifh asbestos-free sail. <br /> Mit�g�tio»Measure Cealogy-2:A design-level geotechnical investigation sha11 <br /> be camplet�d for e,ach lot and far�e utility improvements on Laurel Way. The <br /> geotechnical investigation shall include: <br /> a) Evaluaxion of the layout o�pmpased undergnound utilities,exterior <br /> hardscape,and retaining wal�s to evaluate whether swficiai soil <br /> c�eep vvould itnpac�tbese structunes; <br /> b) Detailed s�urf'ace and subs�u�ace�xplorations pe�'formed for each lot <br /> during the design-1eve1 geotechnical inves�igstion; data from these <br /> investigations shell be used to generate foundation design criteria; <br /> c) Cansideration of the n�eed for extra sfeel reinforcement of piexs and <br /> grads beams,�oids beneath grade bea,ms ta mitigafe uplif�distress to <br /> the stnuctu�res,pe�rixuete�r subdrains and moisture baxriex�,�nd <br /> measures zmplemented duning�onsshvc�ion to prevent concrete aver- <br /> �ours at the tops of the dri�ed piers; aad <br /> d) Consid�ration of�npacts arising fmm excavations of fo�ndation <br /> elements,including drilled piers. <br /> Recommeadativns in the design-Fevel inveskigation report sha11 be implemented, <br /> as appxoved by R�dwood CiLy. At a minimum,the recvmmeadations sha11 <br /> include: <br /> a) Recommendations for mitigating slope instabi�ity during <br /> construetian,if necessary,by utiliziiag temporary exea.vation support <br /> syst�rns or grading oontrals; <br /> b) Recoa�mendations for oorre�tive gra�ing measures to repla.c�e <br /> existing uadoeumented fill with engineered fill; <br /> c} Reoam�nendabions to reduce impacts to utility f�c�lities arising from <br /> dii�e�tial movement related to expansive soils; <br /> �;�� Reoammendations to reduce impacts tn shared hardscape{i.e., <br /> zloadways and sidew�ks)from expansive soils; <br /> 28 <br />