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Operations and Maintenance Guidelines for Bioretention Areas <br />Routine Maintenance Activities <br />The principal maintenance objective is to prevent sediment buildup and clogging, which <br />/u 11 - ¢ 1 l C fi�c d I t, �L ter <br />1 .., .. � ��.. r 1 -n TRO {l- <br />rer.i�ru�3'°ail?irl�c(P?['i-�i''�`tilvdr'crril;Y�l`it;y aliu'iTie'ty'I`cc�u 1V �iiuleriCrll113ii' c7ica raliia're: rruulli'rc <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. <br />Maintenance Task <br />Frequency of Task <br />1 <br />Remove obstructions, debris and trash from bioretention <br />Monthly, or as needed after storm <br />area and dispose of properly. <br />events <br />2 <br />Inspect bioretention area to ensure that it drains between <br />Monthly, or as needed after storm <br />I storms and within five days after rainfall. <br />I events <br />3. <br />Inspect inlets for than eels soil, o.�pnsure or otler <br />AAnnthl�after . ,or as needed aer storm <br />v y - <br />evidence of erosion. Clear obstructions and remove <br />events <br />I <br />sediment. <br />4 <br />Remove and replace all dead and diseased vegetation. <br />Twice a year <br />5 <br />Maintain vegetation and the irrigation system. Prune and <br />Before wet season begins, or as <br />tv L�� h^v r^+nn u'^%^+wrMa y ;-C : <br />n^,dcd <br />appearance. <br />6 <br />Check that mulch is at appropriate depth (3 inches per soil <br />Monthly <br />specifications) and replenish as necessary before wet <br />season begins. <br />/ <br />1 ............3 4:......L. II4:....I GILLQ IIVU ..1:..... <br />II IJL/GIA VIVI clG11UV11 area 4JII Il,. U10 QLtQId IGU IIIJI./GI.0 VII <br />IIIVIILI.1.. QIL..... 1.+....... ..1.......I .. ...1- <br />IVI Vllll lly, VI QIIGI I=IUU OlVllll GV GIItJ, <br />checklist, <br />and after removal of accumulated <br />debris or material <br />Prohibitions <br />rl__ ..__ _r .___.: _: _I__ _.__I _.. .: _1_.__1____ r_..i:c-_.__ <br />l i le use UI Pesticlues and ciulcR release ICI LIIIGeI 5 511-d11 LAC I I III III I IIGeu, dllU ll le LJI 11 IcIIJIe, ul <br />integrated pest management (IPM) followed: <br />1. Fmnlov non -chemical controls (biolonical- nhvsical and cultural controls) before usino <br />chemicals to treat a pest problem. <br />2. Prune plants properly and at the appropriate time of year. <br />3. Provide adequate irrigation for landscape plants. Do not over water. <br />4. Limit fertilizer use unless soil testing indicates a deficiency. Slow -release or organic <br />Icluutcl ro Nlv1c1 &JIc. % lII vvlul 111ui I INa ILy Ivl GP 111w lcyuirclilcllw. <br />5. Pest control should avoid harming non -target organisms, or negatively affecting air <br />and water qua►itv and public health. Apply chemical controls onlv when monitoring <br />indicates that preventative and non -chemical methods are not keeping pests below <br />acceptable levels. When pesticides are required, apply the least toxic and the least <br />persistent pesticide that wiii provide adequate pest controi. Do not appiy pesticides <br />on a prescheduled basis. <br />F Quiaan I In cnillarl fartili-nar nnrl naetir+irlae nn not ln10e111 Olniw nr hl Ini el Ir-h enilla <br />7. Do not over apply pesticide. Spray only where the infestation exists. Follow the <br />manufacturer's instructions for mixing and applying materials. <br />8. Only licensed, trained pesticide applicators shall apply pesticides. <br />9. Apply pesticides at the appropriate time to maximize their effectiveness and minimize <br />Ule likuNhuuu Ul UItiuhal'yllly pt:bilulueb Illlu IUIIUII. VVlll1 Uit UAUdPUUII UI PIld- <br />emergent pesticides, avoid application if rain is expected. <br />