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Bioretention Area <br /> Inspection and Maintenance Checklist <br /> Property Address: 1900 Davis Street,San Leandro,CA 94577 Property Owner: Costco Wholesale Corporation <br /> Treatment Measure No.: Date of Inspection: Type of Inspection: L Monthly i Pre-Wet Season <br /> iAfter heavy runoff 11 End of Wet Season <br /> Inspector(s): 7j Other: <br /> Defect Conditions When Maintenance Is Maintenance Comments(Describe maintenance Results Expected When <br /> Needed Needed?(Y/N) completed and if needed maintenance was Maintenance Is Performed <br /> not conducted,note when it will be done) <br /> 1.Standing Water When water stands in the bioretention There should be no areas of <br /> area between storms and does not standing water once inflow has <br /> drain within five days after rainfall. ceased. Any of the following may <br /> apply:sediment or trash blockages <br /> removed,improved grade from head <br /> to foot of bioretention area,or added <br /> underdrains. <br /> 2.Trash and Debris Trash and debris accumulated in the Trash and debris removed from <br /> Accumulation bioretention area. bioretention area and disposed of <br /> properly. <br /> 3.Sediment Evidence of sedimentation in Material removed so that there is no <br /> bioretention area. clogging or blockage. Material is <br /> disposed of properly. <br /> 4.Erosion Channels have formed around inlets, Obstructions and sediment removed <br /> there are areas of bare soil,and/or so that water flows freely and <br /> other evidence of erosion. disperses over a wide area. <br /> Obstructions and sediment are <br /> disposed of properly. <br /> 5.Vegetation Vegetation is dead,diseased and/or Vegetation is healthy and attractive <br /> overgrown. in appearance. <br /> 6.Mulch Mulch is missing or patchy in All bare earth is covered,except <br /> appearance. Areas of bare earth are mulch is kept 6 inches away from <br /> exposed,or mulch layer is less than 3 trunks of trees and shrubs. Mulch is <br /> inches in depth. even in appearance,at a depth of 3 <br /> inches. <br /> 7.Miscellaneous Any condition not covered above that Meet the design specifications. <br /> needs attention in order for the <br /> bioretention area to function as <br /> designed. <br /> Bioretention Area Maintenance Plan-Page 3 6214.010-C.doc <br />