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Exhibit "C-1" (1 OF 2) <br /> to Storrnwater Treatment Measures Maintenance Agreement <br /> Bioretention Areal Maintenance Plan for <br /> 900.Middlefield Road <br /> October 9, 2013 <br /> • _thy 1 (r( ` i- •- Project Address and Cross Streets <br /> _fir.yri ic '� "`S <br /> 900 Middlefield Road <br /> ap t `* 1 '%q ,i..; - Assessor's Parcel No.: 052-363-170, 180 & <br /> s ` Property Owner: Redwood City Partners, LLC <br /> cm-1,w--- 4'74g.'. ...'-ki-nt.... . — ' - .-,*--,''; ':- ,',f <br /> 'e.;-:"207,- -14:=4_tP-47:-. ‘V* .'"-'0.:si.,'"W' Phone No.: <br /> ~,, - Designated Contact: <br /> Bioretention areas function as soil and plant-based I Phone No_: <br /> filtration devices that remove pollutants through a <br /> variety of physical,biological,and chemical treatment Mailing Address: <br /> processes.These facilities normally consist of a grass <br /> buffer strip,sand bed,ponding area,organic layer or <br /> mulch foyer,planting sail,and plants <br /> • <br /> The property contains two bioretention area(s), located as described below and as shown in the <br /> attached site plane <br /> e Bioretention Area No I is located behind Building B near the City lot <br /> O Bioretention Area No,2 is located behind Building B,east of Bioretention Area No. 1 <br /> I Routine Maintenance Activities <br /> The principal maintenance objective is to prevent sediment buildup and clogging, which reduces <br /> pollutant removal efficiency and may lead to bioretention area failure. Routine maintenance <br /> activities, and the frequency at which they will be conducted, are shown in Table 1 <br /> Table 1 <br /> Routine Maintenance Activities for Bioretention Areas <br /> No. Maintenance Task Frequency of Task <br /> 1 Remove obstructions.debris and trash from bioretention Monthly, or as needed after storm <br /> area and dispose of properly events <br /> 2 Inspect bioretention area to ensure that it drains between Monthly. or as needed after storm <br /> 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 and Before wet season begins,or as <br /> weed to keep bioretention area neat and orderly in needed <br /> appearance <br /> Bioretention areas include linear treatment measures designed to filter water through biotreatment soils A bioretention <br /> area that has no waterproof liner beneath it and has a raised underdrain in the underlying rock layer to promote <br /> infiltration.as shown in Section 6 1 of the C 3 Technical Guidance, may also be called a"bioinfiltration area" <br /> Attached site plan must match the sire plan exhibit to Maintenance Agreement <br /> Page 13 of 19 <br />