RecDoc 2021-156649 1390 Woodside Road

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Bioretention Area Maintenance Plan for 1390 Woodside Road 2021-04-07 Bioretention areas function as soil and plant - based filtration devices that remove pollutants through a variety of physical, biological, and chemical treatment processes. These facilities normally consist of a grass buffer strip, sand bed, ponding area, organic layer or mulch layer, planting soil, and plants. Project Address and Cross Streets: 1390 Woodside Road Redwood City, CA 94061. Proiect is located at the corner of Woodside Road and Massachusetts Ave. Assessor's Parcel No.: 069-111-150 Property Owner: 1390 Woodside LLC Phone No.: 650-845-8100 Designated Contact: 1390 Woodside LLC Phone No.: 650-845-8100 Mailing Address: 1801 Page Mill Road, Palo Alto, CA 9 The property contains four (4) bioretention area(s), located as described below and as shown in the attached site plant. • Bioretention Area No. 1 is located North of the driveway on Woodside Road. • Bioretention Area No. 2 is located South of the driveway on Woodside Road. • Bioretention Area No. 3 is located at the intersection of Woodside Road and Massachusetts Ave. • Bioretention Area No. 4 is located at the intersection of Woodside Road and Massachusetts Ave. I. Routine Maintenance Activities The principal maintenance objective is to prevent sediment buildup and clogging, which reduces pollutant removal efficiency and may lead to bioretention area failure. Routine maintenance activities, and the frequency at which they will be conducted, are shown in Table 1. Table 1 Routine Maintenance Activities for Bioretention Areas No. Maintenance Task Frequency of Task 1 Remove obstructions, debris and trash from bioretention Monthly during the wet season, or area and dispose of properly. as needed after storm events 2 Inspect bioretention area to ensure that it drains between Monthly during the wet season, or storms and within five days after rainfall. as needed after storm events 3 Inspect inlets for channels, soil exposure or other Monthly during the wet season, or evidence of erosion. Clear obstructions and remove as needed after storm events sediment. 4 Remove and replace all dead and diseased vegetation. Twice a year 5 Maintain vegetation and the irrigation system. Prune and Before wet season begins, or as weed to keep bioretention area neat and orderly in needed appearance.