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Site t3esign & landscape Planning SD-1~ <br />regulations to c}iscourage the cleari27g, filli2lg, and. c11aIllleliration of these f'eatures. Utilie <br />tl2em in drainage net~L•orks in lx•eferenc;e to pipes, ctll4~erts, alld en~;ineercd ditches. <br />};valuating infiltratian apporhlnities by referl•ing to the st:ormwater nla2lagcnlt~nt rnanl2al for <br />the jurisdiction and pay particular attention to the. selcctio2l critel•ia ft2r ~~~=aiding <br />grollnd~vater co22ta2ninatior2, potar soils, ar2cl hyclrogeoltlgical conditions tl2at cause these <br />f~lcilitie:s tts fail. 'If 2lecessal'y, lacatt: tlel=elopments with large. amounts t2i' imps rti=ions <br />surfaces tsr a potentill} to produce relativt:h- ctsntaminated runc>i'f <l~a'fly franl grtal2ndl~°atc~r <br />recharge aI•eas. <br />~l'O~~C~2C11I t~f S'lvpes c€rIa t;')Ia~ra2e7s duI•irlc~ hulldsca~a€~ llesiy~~I <br />^ Con~•t~y runoff safely fro2n the tops of slopes. <br />^ .void disturbing stt~ep «r elnstal~e slopes. <br />^ A~=oid disturk~ing natura}channels. <br />^ Stal7ilize disturbed stapes as quickly as possible. <br />^ t'egetate slopes wit12 nat~=e or druul;l2t toler€~nt .•e~ettrtion. <br />^ ~: ontrol .Ind treat flo~~~s i22 landscaping and f or other cc:~I2trols prior to reaching existing <br />natural drainage systems, <br />^ Stabilise tc;Inpora2y illld pcrmal2ellt chan21c1 crossings. as quickly as passib}c, and elrsurC th;~It <br />increases in run-off ~~elocity and frequency callst;d by the project da not C~rc~de the chanllcl. <br />^ Install energy dissipaters, such. as riprap, at the: out}.tts of ne~v starnl drains, cuh~crts, <br />conduits, or channe}s that. enter unlined t:hannt:l.s in accordance ~,,ztll applica}ale <br />specificatians to mi2limize erosion. Energy dissipaters shat} be installed in such. a ~~~=ly as to <br />Il'1m1m2LC. 2mpaC t5 t{} reCel~Ilg 1"~'ateI'S. <br />^ I..ine an-sit€~ cont-e~,=ance channels ~r~•here appral~riate, to redtlcc crosic.>n ctll.~:st:tl lati incre~ascd <br />f csti~~ velcscit}-due tcs increases iI2 tributary illllser~ ions area. The first c}2;:lice. for linings <br />should lie grass or some other ~°cgetative suI•face, since these Inatel•ials nc>t tanly rt~dl2ce. <br />ralnoff ~~elocities, but also pra~~itle ~>=atC;r qurl}ity hcnc~ts front filtration and infilt2•atioxl. If <br />ti=e}acities in the channel are high enal€gh trs oracle grass o2° other vt:getaltit-e linings; riprap, <br />ctxlcrete, soil celrlcnt, csr gees-grit} ~ta.bilizatioll <Ire other alternatives. <br />^ ~'ansitler other de,5igl2 principles tl2at are. cornl2aral~le and equally effective. <br />Redeuelvpinrj I;xisi"i1~g Instnllat-ions <br />L?ariaus j€2risdictiona} storln~~rater mtll2agelnealt arltl mitigation p}.ales (SLS?~iP, ~VC~IO=II', t°tc.} <br />defiz:€~ "redevelcsp2nent" in t.errlls cif rln2as€lnts of aclditio12a1 irnf,ervicsus aroa, inc2ea5e°s in gross <br />floor area andJor exterior construction,l2nd }and. d.istclrbirlg activities i~~ith structural ter <br />inlper~=ious surfaces, T:hr detinition of " redevelopment'` nnlst be corlsu ted to dcternline <br />xti=hctllCr or not-the requirt~2~gnts for nel~= tlc~t~ls>pment apphr ta:I zlroas intc~nr3cd for <br />redC'JelC)1)1T1C'dlt. If the dC't1n2t2CJ22 applies, tl2E Ste})S ant}I11EC1 I1nC}C'I "C1C'..Signin~?, t1C~~ti IYl~tall~tit331s" <br />abrwe should he fcsllauft;d. <br />ian;a~rjr 2~J0~ Caiifarnfa Sto~mwaCer B'~iP N~~dizook 3 of ~~ <br />Nati+~~ 1?~ve~o~m~rt: ~ncl €"<~~~v~dpprner3€ <br />www,catampt~ar~df5~o[c~.can~ <br />20D-34 <br />