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...... .. . ......._ ■ I- <br /> Bioretention Area' Maintenance Pian for <br /> Multi-Family Residential Development <br /> November 4, 2014 <br /> � <br /> Project Address and Cross Streets: 1022-1024 <br /> � 10`�Avenue.San Mateo.CA 94601 <br /> � � �� <br /> `�'` <br /> ���` �`� ��'� ����Assessor's Parcel No.: 055-043-830 <br /> � „n� <br /> Property Owner: 10"'Avenue Partners.LLC <br /> A�Phone No.: (650�42-3030 <br /> Designated Contact: Kevin Phillins <br /> Phone No.: (6501342-3030 <br /> e�orctentlon areas junctlon os sot!and plant based M��g Address: 311 South Ellsworth <br /> �rkration devices that remove poilutanis San Mateo,CA 94401 <br /> through a variery of physicol,btoloylcal,and <br /> chemicol trcatment processes.These facilities <br /> normaliy consist of o pross bufter strip,sand bed, <br /> ponding area,oryanic layer or mulch Myer, <br /> planting soil,and plants. <br /> The properiy conta.ins one bioretention area(s),located as described <br /> below and as shown in the attached site plan2. <br /> ❑ Bioretention Area No.l is located at the easterly end of development between a residence and"back" <br /> property line. <br /> ❑ Sump Pump No.l is located along the north pmperty line in a catch basin near the site entrance. <br /> I. Routine Maintenance Activities <br /> The principal maintenance objective is to prevent sediment buildup and clogging,which <br /> reduces pollutant removal efficiency and may lead to bioretention area failure.Routine <br /> maintenance activities,and the frequency at which they will be conducted,are shown in <br /> Table 1. <br /> Table 1 <br /> Routine Maintenance Activities for Bioretention Areas <br /> No. Maintenance Task Fre uen of Task <br /> 1 Remove obstructions,debris and trash from Monthly,or as needed after storm <br /> bioretention area and dis ose of ro erly. events <br /> 2 Inspect bioreiention area to ensure that it drains Monthly,or as needed after storm <br /> between storms and within five days after rainfall. events <br /> 3 Inspect inlets for channels,soil exposure or other Monthly,or as needed after storm <br /> evidence of erosion.Clear obstructions and remove events <br /> sediment <br /> 4 Remove and replace all dead and diseased vegetation. Twice a year <br /> 5 Maintain vegetation and the irrigation system.Prune Before wet season begins,or as <br /> and weed to keep bioretention area neat and orderly needed <br /> in a e�rance <br /> Bioretention areas include Nnear treatment measures designed to filter water through bfotrcatment soils.A bioretention <br /> area that has no waterproof Iiner beneath it and has a raised underdrein in the underlyfng roek layer to promote <br /> Mfihntion,as shown in Section 6.1 of the C.3 Technical Guidance,may also be called a"bioinfiftration area". <br /> ATTY/AGR.2014.260/102210th Ave <br />