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Exhibit C Bioretention Area' Maintenance Plan for BDC Phase IV Expansion November 11, 2016 Project Address and Cross Streets 700/720/740 Bav Road and Woodside Road Assessor's Parcel No.: 054-062-140. 054-062-120. 054-062-130 Property Owner: Phone No.: Designated Contact: Bioretention areas function as soil and plant- Phone No.: based filtration devices that remove pollutants through a variety of physical, biological, and Mailing Address: 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 one (1) existing bioretention area and three (3) proposed bioretention areas, located as described below and as shown in the attached site plane. Bioretention Area No. 1 is located at the north side of the yard adjacent to the northeast entry of Building 740. Bioretention Area No. 2 is located within a parking median in the parking lot north of Building 720 and west of Building 740. Bioretention Area No. 3 is located within the southwest corner of the parking lot just north of Building 720 and west of Building 740. Bioretention Area No. 4 is located adjacent to the southwest entry of Building 740. 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 area 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 1 Remove and replace all dead and diseased vegetation. Twice a year Bioretention areas include linear treatment measures designed to filter water through biotreatment soils. A bioretention area that has no waterproof liner beneath it and has a raised underdrain in the underlying rock layer to promote infiltration, as shown in Section 6.1 of the C.3 Technical Guidance, may also be called a "bioinfiltration area". 2 Attached site plan must match the site plan exhibit to Maintenance Agreement. Page 1 Revised 11/30/11 .� ea,axmorst.eeuus,m e�:ry z�..:asrmuxs�auouwnrw u�,em.�:: c.e�armamwma..�.e� ATTY/AGR.AGR.2015.123/BMR - Bay LP - STMMA