Laserfiche WebLink
�� All proposed structures and imp�,ovements shall be set�approp�iate <br /> distance fmm the top of#he existing c�eek banks as determined by the City <br /> and per the r�quirements of Zoning Q�tdxna�a�e Section 32.12. <br /> m) Cansideratian shall be given to biotechnical creek bank stabilizatian <br /> methods and litniting surFace water nmoff into tbe areek. <br /> n) Install a subdrain system of perforated pipe and penneab�e drain m�lc ar <br /> gravel as needed to mitigate pot.�ntial sprin�s that caufd acc�r dwring the <br /> winter. Subd�a.ins shall be inst�lled where seeps�ge is obsaved,and a <br /> canceptual subdrain plan shall be prepared once grading plans have been <br /> finalized. <br /> o) A geotechnical engineer shall be on site during or jusi�following heavy <br /> rainstrnms to evaluate�a.d map the locations of springs�n t�e site,and <br /> provide r�oommendations for mitigating the adver�e itnpacts of spiin.gs or <br /> seeps,ifnecessary. <br /> p) The shallaw landslide area on Lots �4 and 15 shall be comple�elyremoved <br /> down to be�k, and the grade rebuilt with a key��d benched <br /> engineered buttress fill containing subdrains. <br /> c� �irther evaIuation of the questionable landslide near the�iottam of Lots 3 <br /> and 4 shal]�e performed during�he design-1�e1 g�otechnical investigation.s <br /> for Lots 1 through 4 to pravide detailed r�commendation.s for keyways, <br /> benching, and subdrains.The�esign-level geotechnical investigation shatl <br /> determine whether mitiga�ion is needed tfl reduce the potential for damage <br /> to the plannal site imp�rovem�nts and the po�ntial for adversely affecting <br /> neighborin8 l�P�es. <br /> r) The bottom of#he bio-retention basins an Lots 5, 7, 8,9, and 10 sb�a11 be <br /> lined with HDPE liner to limit water infiltration into the native�ils below <br /> the p�rmeable filt�r soi�s.A subdrain shall be instail8d abavc the HDPE <br /> liner to intercept the excesa water aad direct it to a suitable discharge point, <br /> The spe�ific reoomm�nda�ians far the HDPE liner syste�n and subdrains <br /> shall be presented in the design-level geot$chnical repart. <br /> s} The outfall for the bao-rete�ian basins shall release the discl�arge near the <br /> b�se of the seasonal creek and shall not be allawed tn flaw aver the top of <br /> th�c�eek banks. <br /> t) Cut-ufFplugs consisting 4f control�ed density fil] about 2 feet wide and <br /> keyecl into the native soils shall be installed at 2S- to 50-foot inter�als a�lang <br /> all pip�line trenches and at the beginning,midpoznts,and ends of the culvert <br /> and a1136-inch-diameter de�tion pipes. Specific recoxnm�darions for the <br /> cut offpluge shall be presented in the d�sign-leve�geatechnical repozt <br /> u) All gropased structure,s shall be t�fesigned in accordance ws'th the seismie <br /> design criteria of the 2010 Califc�rnia Building Code(GBC)nr othez re�nt <br /> applicable building code. <br /> v) Cut areas in serpentinite and exposed fill slopes composed of serpentinite <br /> rock shall be capped with asbestoa-free saiI. <br /> 21 <br />