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<br />E,XI-IJ/3IT C <br />Sioretention Area Maintenance Plan for <br />TRAILER VILLA <br />3401 EAST SA YSHORE ROAD <br />REDWOOD CITY <br />JUNE 13, 2009 <br /> <br /> <br />Bioretention areas function as soil and plant- <br />based filtration devices that remove pollutants <br />through a variety of physical, biological, and <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 /> <br />Project Address and Cross Street <br />3401 EAST BAYSHORE ROAD <br /> <br />Cross street: Seaport Boulevard <br />Redwood Citv. Ca <br />Assessor's Parcel No.: 055-010-170 and 250_ <br />Property Owner: Dohney-Vidovich Partners_ <br />Phone No.: 408-738-4444 <br />Designated Contact: STEVE FRAIDENBURG_ <br />Phone No.: 650-366-7886 <br /> <br />The property contains two bioretention area(s), located as described below and as shown <br />in the attached site plan 1. <br />. Bioretention Area No. 1 is located at the northwest corner of the property <br />. Bioretention Area NO.2 is located at the northeast corner of the property. <br /> <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 /> <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 /> <br />1 Attached site plan must match the site plan exhibit to Maintenance Agreement. <br />C:\6.6Bi_A11:atemplate.doc Page 1 <br /> <br />NOS Approved 12/5/07 <br />