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Exhibit "C" <br /> Bioretention Areal Maintenance Plan for <br /> Design Tech Charter School <br /> June 3, 2016 <br /> : y' Project Address and Cross Streets <br /> : s <br /> n <br /> „ , a i 275 Oracle Parkway, Redwood City, CA 94065 <br /> " Assessor's Parcel No.: 095-040-999 <br /> ,t" r <br /> ff "` Property Owner: Oracle America Inc. <br /> T <br /> } -y,� Phone No.: <br /> ` ' .h ;k '. i �Sd '.5 <br /> A Designated Contact: <br /> a <br /> .� . �s ti "� ">, 11,'"`� Phone No.: <br /> Bioretention areas function as soil and plant- Mailing Address: 500 Oracle Parkway 50P-8 <br /> based filtration devices that remove pollutants 9 <br /> through a variety of physical, biological, and Redwood Shores, CA 94065 <br /> chemical treatment processes. These facilities <br /> normally consist of a grass buffer strip, sand bed, <br /> ponding area, organic layer or mulch layer, <br /> planting soil, and plants. <br /> The property contains 6 bioretention area(s), located as described below and as shown in <br /> the attached C6.0 & C6. 1 Stormwater Management Plan. <br /> • Bioretention Area No. 1 is located within DMA-00 & DMA-01 , southwest of the parking lot. <br /> • Bioretention Area No. 2 is located within DMA-02, northwest of the school. <br /> • Bioretention Area No. 3 is located within DMA-03, northwest of the school. <br /> • Bioretention Area No. 4 is located within DMA-08, northeast of the school. <br /> • Bioretention Area No. 5 is located within DMA-13, southeast of the school. <br /> • Bioretention Area No. 6 is located within DMA-18, north of the BCDC parking area. <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 /> ' Bioretention areas include linear treatment measures designed to filter water though 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 /> Page 1 Revised 11/30/11 <br /> Petal ume..e['e nax'oeonewnonew.va018NWT &Pi <br /> ATTY/AGR/2016.160/CENTRUM OWNERS ASSOCIATION - STMMA <br /> REV: 06-22-16 JS <br />