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Regional Water Quality Cantrol Board for approval.The SPCC Plaa wou�ld be <br /> required to bs implemented and would describe p�revenkion measures and r�p�nse <br /> measures for spills of hazardous materials,which would miw�rn��e impacts an <br /> water quality. Impact 3,7-2�nd propo�e�i mitigat�on are described on Draft EIR <br /> pages 3.7-13 and 3.7-14 and Revised Final EIR pages 4-22 and 4-23,which are <br /> hereby incorporated by referen�e. <br /> Impact 3.7-4 <br /> ������� Starmwater runoff would likeiy increase during constrnctinn as ground oover is <br /> �removed,and an increase in impervious surface a�cea in the post-cnnstructio�n <br /> period rould result in an increase in peak anuioff at downstream drainage facilities. <br /> Thes�effects cnu�d potentially exac�bate downsiream drainage,flooding,and <br /> erasian problem.s, crea,ting the potential to re�ult in an increase in peak dischar,ge <br /> at downstream d�tainage:facilities,increasing erosion or flaoding off site, <br /> Mitigation: Mitigation Mea�ure Hy�rology-1: Prior to is�ance of grading pe�mifs or <br /> approval 4f improvement plans,the applicaat shall submit a detailed Erosion <br /> Control Plan{ECP)to the Director of Public Warks nf Redwood City fnr review <br /> and appmval.. The pu.rpose of the ECP shall be to mitigate emsion and <br /> sedimentatioz�impacts during the construction period. 'I'he applicant shall <br /> implement the approved E�P.The detailed ECP shatl be acoompanied by a <br /> writt�n narra.tive and shall include, at a minimum,the followi.ng: <br /> a) Proposed scheduls of grading actiirities,monitoring,aAd infrastructure <br /> mil�atanes in chinnological format <br /> b) Identification of critical a�reas af high eradibility potential and/or unstable <br /> slopes <br /> �} Use of soil stabiliz�tion techniques s�xch as shott-term biodegradable enasion <br /> contml bl�nkets and hydroseeding. Silt fences ahall be instailed dovsmslope <br /> of all graded s�opes. Straw wattles or another approptiate BMP sha11 be <br /> installed im the flow path of graded areas receiving concentrated flows,as <br /> well as around storm drain inlets <br /> d) Description of erosion controllneaswes on s�opes,lots, and streets <br /> e) Contour aad spot elevations indicating runai��a.tterns before and after <br /> �'�� <br /> � Filter systems at catch basins(drop iniets)in private streets as a means of <br /> sediment control <br /> g) Post constru�tion inspecxion af all dra�in.age facili�ies for accumulated <br /> sediment,and the clearing of these drainage structures of debris and <br /> seditnent <br /> Mitigation Measure Hydrology-�: Prior to issuance a f a grading permit,#1�e <br /> applicant sh�ll subinit evid�nce to the G`ity Engineer of Redwood City that <br /> caverage under the atate�+ide t�eneral Carisbruction Acrivides Stormwater Permit <br /> �G�eral PerrQit)has been obtained.The applicaut sha11 comply with the NPDES <br /> 39 <br />