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EXHIBIT C <br />Bioretention Area' Maintenance Plan for <br />2002 Davis Street <br />Project Address and Cross Streets: 2002 Davis Street San Leandro CA <br />Assessor's Parcel No.: 079A-0417-001-18 <br />Property Owner: EWA San Leandro 2002 Owner, LLC Phone No.:415-839-9228 <br />Designated Contact: Alpha Lam Phone No.: 415-839-9228 <br />Mailing Address: 1099 18th Street, Suite 2900, Denver, CO 80202 <br />The property contains 1 bioretention area(s), and outfall structure located as described <br />below and as shown in the attached site plane. <br />■ Bioretention Area No. 1 is located at the north side of the property <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 Bioretention Areas <br />No. <br />Maintenance Task <br />Frequency of Task <br />1 <br />. Remove obstructions, debris, accumulated sediment and <br />Monthly, or as needed after storm <br />trash from bioretention area and dispose of properly. <br />events. <br />• Maintain vegetation and the irrigation system. Prune and <br />weed to keep bioretention area neat and orderly in <br />appearance. <br />2 <br />• Remove and replace all dead and diseased vegetation <br />Before wet season (August or <br />(replace plants in kind, or per Alameda Countywide <br />September), and <br />Clean Water Program C.3 Technical Guidance Appendix <br />After wet season (May) <br />B plant list). <br />• Till or replace soil (using biotreatment soil mix specified <br />in C.3 Technical Guidance Appendix K) as necessary to <br />maintain the design elevation of soil. <br />3 <br />. Inspect bioretention area using the attached inspection <br />Before wet season (inspect in <br />checklist. <br />August make all corrections by <br />Provisions for rip rap areas and overall structure. <br />September 30), and <br />After wet season (May), and <br />Monthly during wet season <br />(October through April) <br />4 <br />. Remove obstructions, debris, accumulated sediment and <br />Monthly, or as needed after storm <br />trash from outfall structure. Inspect cracks on weir plate <br />events. <br />and clean orifice if clogged. <br />Bioretention areas include linear treatment measures designed for water to filter through biotreatment soils. <br />A bioretention area that is unlined and has a raised underdrain in the underlying rock layer to promote <br />infiltration, as shown in Section 6.1, may also be called a "bioinfiltration area". <br />2 Attached site plan must match the site plan exhibit to Maintenance Agreement. <br />Page 1 of 3 Revised 12/08/2020 <br />