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EXHIBIT C Bioretention Area Maintenance Plan for TK Services March 2015 I" ,cv I: , _`" �_ Project Address and Cross Streets: 41104 -. �` -`' 1470 Doolittle Drive, San Leandro, CA , 1300'±south of Davis Street Bioretention areas function as soil and plant- based filtration devices that remove pollutants through a variety of physical,biological,and Assessor's Parcel No.: 077A-0680-002-03 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. The property contains 2 Bioretention areas, located as described below and as shown in the attached site plan. • Bioretention Areas No. 1 & 2 [labeled on Exhibit Bj are located on the south side of the property for above noted address. 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,or as needed after storm areas and dispose of properly. events 2 Inspect bioretention area to ensure that it drains between Monthly,or as needed after storm storms and within five days after rainfall. events 3 Inspect inlets for channels,soil exposure or other Monthly,or as needed after storm evidence of erosion.Clear obstructions and remove 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. 6 Check that mulch is at appropriate depth(3 inches per soil Monthly specifications)and replenish as necessary before wet season begins.