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EXHIBIT C <br />Bioretention Area! Maintenance Plan for <br />Kaiser Foundation Hospitals <br />Redwood City Medical Center <br />July 3, 2018 <br />Bioretentron areas function as sots and plarb- <br />based 6tratfon devkes that remove poMulants <br />through a variety ofphysba; b'obgical and <br />chemcal treatment processes. These facR es <br />normaly consist of a grass buffer sit*), sand bed, <br />ponc6ng area, agent layer or muth foyer, <br />panting sal, and plants. <br />Project Address and Crass Streets: 1100 <br />Veterans Boulevard, Redwood City. CA 94063- <br />2026 Cross street Walnut <br />Assessor's Parcel No.: 053-202-140, 053-204- <br />050.052-376-030 <br />Property Owner: Kaiser Foundation Hospitals <br />Phone No.: 650-299-3048 <br />Designated Contact: Narsimha Irrinki. SSA <br />Phone No.:650-299-3254 <br />Mailing Address: 901 Marshall Street, Floor 3. <br />Redwood City. CA 94063 <br />The property contains ten (19) bioretention area(s), located as described below and as <br />shown in the attached site plan'. <br />• Bioretention Area No. 1— 9 are located in Parking Lot E-1. <br />• Siorentione area No.9 is located at hospital drop-off area <br />• Biorention Area No. 10 is located in Parking Lot N-1. <br />• BioretentionArea No. 11117 are located near MOB2. <br />• BioretentionArea No. 18.19 are located near Cypress Building. <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 7 <br />Routine Maintenance Activities for Bioretention Areas <br />No. <br />Maintenance Task <br />Frequency of Task <br />1 <br />Remove obstructions, debris and trash from bioretention <br />M onlhy, or as needed after storm <br />area and dispose of properly. <br />events <br />2 <br />Inspect bioretentlon area to ensurethat it drains betwaen <br />M ordhy, or as needed after storm <br />storms and within five days after rainfall. <br />events <br />3 <br />Inspect inlets for channels, soil exposure or other <br />M onthty, 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 ayear <br />I Bioretentim arms include linear tr®tment mmcasures designed to fillervater through biotreatm nt soils. A biord.entirm <br />area that has no waterproof liner beneath it and has a raised undadtain in the underlying rock layer to promote <br />infiltration, as shorn in Section 6.1 of the C.3 Technical Guidance, tory also be called a "bioinfilttation area'. <br />' Attach al site plan must match the site plan eAtibit to Mairbenance Agreement. <br />Page 18 of 24 <br />REV: 08-17-18 PR <br />ATTY/AGR.2018.195/Kaiser MOB2 - STMMA <br />