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8 <br /> Biocell(Bioretention Cell) <br /> Location: PIN9874-71-7383 <br /> Important operation and maintenance procedures: <br /> • Immediately after the bio-retention cell is established,the plants will be watered twice weekly if needed until the plants <br /> become established(commonly 6 weeks). <br /> • Snow,mulch or any other material will NEVER be piled on the surface of the bio-retention cell.Heavy equipment will <br /> NEVER be driven over the bio-retention cell. <br /> • Wheeled or tracked equipment will NEVER be driven over the bioretention planting surface. <br /> • Special care will be taken to prevent sediment from entering the bioretention cell. <br /> • If standing water is present 2 days after rainfall,conduct an infiltration test of the soil media. <br /> After the bioretention cell is established,inspect it quarterly. Inspection activities shall be performed as follows and maintenance <br /> activities shall commence immediately to remediate any problems observed per the table below. <br /> SCM element: Potential problem: How to remediate the problem: <br /> The entire SCM Trash/debris is present. Remove the trash/debris. <br /> The perimeter of the SCM Areas of bare soil and/or erosive Regrade the soil to remove the gully,and plant a <br /> gullies have formed. ground cover and water until it is established. <br /> Provide lime and a one-time fertilizer application. <br /> Vegetation is too short or too long. Maintain vegetation at a height of approximately <br /> six inches. <br /> The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off-site. <br /> The pipe is cracked or otherwise Replace the pipe. <br /> damaged. <br /> Erosion is occurring in the swale. Regrade the swale to smooth it over and provide <br /> erosion control devices such as reinforced turf <br /> matting or riprap to avoid future problems. <br /> Stone verge is clogged or covered Remove sediment and replace with clean stone. <br /> in sediment(if applicable). <br /> The pretreatment area Flow is bypassing pretreatment Regrade if necessary to route all flow to the <br /> area and/or gullies have formed. pretreatment area. Restabilize the area after <br /> grading. <br /> Sediment has accumulated to a Search for the source of the sediment and remedy <br /> depth greater than three inches. the problem if possible. Remove the sediment and <br /> restabilize the pretreatment area. <br /> Erosion has occurred. Provide additional erosion protection such as <br /> reinforced turf matting or riprap if needed to <br /> prevent future erosion problems. <br /> Weeds are present. Remove the weeds,preferably by hand. <br /> Page 3 of 6 <br />