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EXHI®IT C <br /> Bioretention Areal Maintenance Plan for <br /> Marsh Manor <br /> 5/26/15 <br /> ' ,rr, Project Address and Cross Streets <br /> ,� � # , , 3636 Florence St. and Marsh Rd. <br /> , l F.t. %7 - Assessor's Parcel No. : 055-215-010 <br /> a . 4‘ Property Owner: Delucchi Marsh Manor <br /> Ventures, LP, a California Limited Partnership. <br /> Phone No. : 650-851 -8142 <br /> ,. Designated Contact: <br /> Bioretention areas function as soil and plant- Phone No. : 650-851 -8142 <br /> based filtration devices that remove pollutants <br /> through a variety of physical, biological, and Mailing Address: 250 Willowbrook Dr. <br /> chemical treatment processes. These facilities <br /> normally consist of a grass buffer strip, sand bed, Portola Valley, CA 94028 <br /> ponding area, organic layer or mulch layer, <br /> planting soil, and plants. <br /> The property contains one bioretention area(s), located as described below and as shown <br /> in the attached site plant. <br /> • Bioretention Area No. 1 is located at westerly most corner of 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. Maintenance Task Frequency of Task <br /> 1 Remove obstructions, debris and trash from bioretention Monthly, or as needed after storm <br /> area and dispose of properly. events <br /> 2 Inspect bioretention area to ensure that it drains between Monthly, or as needed after storm <br /> storms and within five days after rainfall. events <br /> 3 Inspect inlets for channels, soil exposure or other Monthly, or as needed after storm <br /> evidence of erosion. Clear obstructions and remove events <br /> sediment. <br /> 4 Remove and replace all dead and diseased vegetation. Twice a year <br /> 5 Maintain vegetation and the irrigation system. Prune and Before wet season begins, or as <br /> weed to keep bioretention area neat and orderly in needed <br /> appearance. <br /> 6 Check that mulch Is at appropriate depth (3 inches per soil Monthly <br /> specifications) and replenish as necessary before wet <br /> season begins. <br /> Bioretention areas include linear treatment measures designed to filter water through biotreatment soils. A bioretention <br /> area that has no waterproof liner beneath it and has a raised underdrain in the underlying rock layer to promote <br /> infiltration, as shown in Section 6. 1 of the C.3 Technical Guidance, may also be called a "bioinfiltration area". <br /> 2 Attached site plan must match the site plan exhibit to Maintenance Agreement. <br /> Page 1 Revised 11/30/11 <br /> ATTY/AGR.2015. 130/3636 Florence St <br />