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II.0 Bio-Retention Area General Operation and Maintenance Checklist <br /> Frequency: Ongoing <br /> ❑ Observation: <br /> Before making any modification on-site to downspouts,grading, landscaping or drainage <br /> patterns, etc.,ascertain what effect such modification will have on the flow of water to the <br /> bio-retention area. <br /> O Maintenance Action: <br /> Refrain from any construction,grading, landscaping, piping or any other construction that <br /> will affect the flow of water to the bio-retention area. Correct any changes that divert <br /> stormwater away from treatment facility and otherwise reduce its effectiveness. <br /> Frequency: Monthly <br /> U Observation: <br /> Inspect the bio-retention area for litter,debris, leaves, dead vegetation and anything else <br /> that might interfere with flow,filtration or growth of grass or plants. <br /> O Maintenance Action: <br /> Remove all such litter,debris, leaves,dead vegetation,etc. by hand or with hand tools. <br /> Replace dead vegetation as appropriate. <br /> ❑ Observation: <br /> Inspect for growth of trees or invasive plants in bio-retention area. <br /> O Maintenance Action: <br /> Remove invasive plants,weeds,shrubs,trees,or anything with a woody stem from the bio- <br /> retention area. <br /> ❑ Observation: <br /> Inspect condition of grass or plants in the bio-retention area. Grass or plants must be of <br /> sufficient density and health to provide filtration and protect from erosion. <br /> O Maintenance Action: <br /> Mow as necessary,fertilize as necessary, note bare spots and reseed as necessary, remove <br /> dead grass and reseed as necessary. Fertilization is be performed by a licensed professional. <br /> Only the minimum effective amount of fertilizer is to be used,to prevent downstream <br /> eutrification. Fertilizers used should be the most environmentally benign products <br /> available. <br /> 2009 Farallon Drive Page 3 San Leandro,Ca <br />