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6.A. - Page 76 of 81 <br />Bio -retention Area <br />Inspection and Maintenance Checklist <br />Property Address:211/217 Vera Avenue, Redwood City, CA APN:053-091-080/090 <br />Treatment Measure No.: 2 Date of Inspection: Type of Inspection <br />Inspector(s): <br />Property Owner: Vera Ave RC LLC <br />❑ Monthly ❑Pre -Wet Season <br />❑After heavy runoff ❑ End of Wet Season <br />❑ Other: <br />Defect <br />Conditions When Maintenance Is <br />Maintenance <br />Comments (Describe maintenance <br />Results Expected When <br />Needed <br />Needed? (Y/N) <br />completed and if needed maintenance was <br />Maintenance Is Performed <br />not conducted, note when it will be done) <br />1. Standing Water <br />When water stands in the bio -retention <br />There should be no areas of standing <br />area between storms and does not drain <br />water once inflow has ceased. Any of the <br />within five days after rainfall. <br />following may apply: sediment or trash <br />blockages removed, improved grade from <br />head to foot of bio -retention area, or <br />added underdrains. <br />2. Trash and Debris <br />Trash and debris accumulated in the bio- <br />Trash and debris removed from bio - <br />Accumulation <br />retention area. <br />retention area and disposed of <br />properly. <br />3. Sediment <br />Evidence of sedimentation in <br />Material removed so that there is no <br />bio -retention area. <br />clogging or blockage. Material is <br />disposed of properly. <br />4. Erosion <br />Channels have formed around inlets, <br />Obstructions and sediment removed so <br />there are areas of bare soil, and/or other <br />that water flows freely and disperses over <br />evidence of erosion. <br />a wide area. Obstructions and sediment <br />are disposed of properly. <br />5. Vegetation <br />Vegetation is dead, diseased and/or <br />Vegetation is healthy and attractive in <br />overgrown. <br />appearance. <br />6. Mulch <br />Mulch is missing or patchy in appearance. <br />All bare earth is covered, except mulch is <br />Areas of bare earth are exposed, or mulch <br />kept 6 inches away from trunks of trees <br />layer is less than 3 inches in depth. <br />and shrubs. Mulch is even in <br />appearance, at a depth of 3 inches. <br />7. Subdrain <br />When water stands in the bio -retention <br />There should be no areas of standing <br />area between storms and does not drain <br />water once inflow has ceased. Clean <br />within five days after rainfall. <br />and flush subdrain. <br />8. Miscellaneous <br />Any condition not covered above that <br />Meet the design specifications. <br />needs attention in order for the bio - <br />retention area to function as designed. <br />61 Page <br />ATTY/AGR.2019.266/211/217 Vera (Page 33 of 38) <br />82 <br />