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Exhibit C <br />Bioretention Area' Maintenance Plan for <br />Broadway CVS Plaza <br />5/21/2020 <br />Project Address and Cross Streets: 1155 <br />- Broadway. Redwood City CA 94063 near <br />Woodside Rd and Bay Rd <br />STr� � •ii ���-,air , a_ •:. <br />�Y <br />All <br />it <br />Bioretention areas function as soil and plant - <br />based filtration devices that remove pollutants <br />through a variety of physical, biological, and <br />chemical treatment processes. These facilities <br />normally consist of a ponding area, mulch layer, <br />vegetation and biotreatment soil mix. <br />Assessor's Parcel No.: 054-022-070, 054- <br />022-200 054-022-160 054-022-170 and <br />054-022-150 <br />Property Owner: The Sobrato Organization, <br />LLC <br />Phone No.: (650) 876-7010 <br />Designated Contact: Peter Tsai <br />Phone No.: (650) 876-7010 <br />Mailing Address: 599 Castro Street, Suite <br />400. Mountain View, CA 94041 <br />The property contains 2 bioretention area(s), located as described below and as shown in <br />the attached site plane. <br />- Bioretention Pond TCM -11 is located along the North West corner of the CVS site east of <br />Woodside Road. <br />- Bioretention Pond TCM -12 is located along the South frontage of the CVS site North of Bay <br />road <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 Bloretentlon Areas <br />No. <br />Maintenance Task <br />Frequency of Task <br />1 <br />Remove obstructions, debris and trash from bioretention <br />Monthly, or as needed after storm <br />area and dispose of properly. <br />events <br />2 <br />Inspect bioretention area to ensure that it drains between <br />Monthly, or as needed after storm <br />storms and within five days after rainfall. If ponded water <br />events <br />does not drain within five days, check if drains are <br />clogged or consider removing the surface biotreatment <br />soil and replacing with the approved soil mix and replant <br />3 <br />Inspect inlets for channels, soil exposure or other <br />Monthly, or as needed after storm <br />evidence of erosion. Clear obstructions and remove <br />events <br />sediment. <br />4 <br />Remove and replace all dead and diseased vegetation. <br />Twice a year <br />1 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 />z Attached site plan must match the site plan exhibit to Maintenance Agreement. <br />Bioretention area O&M Page 1 of 3 <br />A7rY/AGR.2020.083/Broadway Plaza - Bay Block (Page 17 of 19) <br />