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6.1.D. - Page 41 �XHIBIT C <br /> Bioretention Area (including Bioretention Swale) Maintenance Plan for <br /> Bair Island Road -- Phase 2 <br /> February 2013 <br /> '�F .• <br /> _ � � � Project Address and Cross Streets <br /> _. -°r ; Bair Island Road. Redwood Citv, CA <br /> ��} � Assessor's Parcel No.: 052-531-140 <br /> F:. <br /> �► '��t►"T � Pro ert Owner: RC Peninsula Park LLC <br /> �� � .��R f� ���` � � P Y <br /> ` '' - '�*`'� � -+. <� "± Phone No.: 303-371-9000 <br /> * y.�"'� � � � �*�' <br /> -• s - " � � Designated Contact: Matt Salmon <br /> Phone No.:510-453-0312 <br /> Bioreteniion areas funciion as soil and p/ant- <br /> based filiration devices that remove pollutants Mailing Address:270 St. Paul Street. Suite 300 <br /> through a variety of physical,biological,and <br /> chemical treatmeni processes. These facilities Denver, C� 80206 .. <br /> normally consist of a grass buffer strip,sand bed, <br /> ponding area,organic layer or mulch layer, <br /> p/anting soil,and plants. <br /> The property contains 10 bioretention area(s), located as shown in the attached site plan'. <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 Malntenance 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 /> 7 Inspect bioretention area using the attached inspection Monthly,or after large storm events, <br /> checklist. and after removal of accumulated <br /> debris or material <br /> �Attached site plan must match the site plan exhibit to Maintenance Agreement. <br /> Page 1 NDS Approved 12/5107 <br /> V�VOOtlIM]If-Bv Lhd0.a01/o!lNCOIM117 YDl Ph�e 2 ApeewmM�vvotr Iepa�em�a Ape�e�pp�R COee WitBbeLNqYN ONYados <br />