Task 1: Inspection of Wetland 1 & Level Spreader 1 (together known as “SCM 1”) and Wetland 2 & Level Spreader 2 (together known as “SCM 2”): Consultant will be required to provide qualified personnel to perform inspections/investigations of SCM 1 & SCM 2, as identified on the plan set attached hereon hereby known as “Exhibit B, SCM Details” (Exhibit “B”). The inspection/investigation will include, but not limited to; Inventory of existing approved species of vegetation in SCM 1 & 2 and recommendations for supplementation, as required to fulfill the planting schedule shown in Exhibit “B”. Inventory of existing invasive species, not a part of the original project planting palette, in SCM 1 & 2 and recommendations for removal. Identification of any erosion within the limits of SCM 1 & 2 and recommendations to remediate. Inspection of wetland slopes (check for slope uniformity and conformance to the improvement plans, as shown in Exhibit “B”) Inspection, via CCTV or approved equivalent, of storm drain pipes conveying water from Wetland to Level Spreader. o Note: based on City observations there appears to be a drainage issue with the pipe system leading from Wetland 1 to Level Spreader 1. Consultant shall identify the issue and provide recommendations for remediation. Inspection of each wetland’s inlet structure and recommendation for maintenance or repair, if needed. Inspection of each wetland’s outlet structure and recommendation for maintenance or repair, if needed. Determination of sediment buildup in forebay and main pool for both SCMs and recommendation for limits of removal. Task 2: Inspection of Filterra Tree Well Units Consultant will be required to provide qualified personnel to perform inspections/investigations of the two (2) Filterra Tree Well Units, located at the roundabout at the intersection of Danube Lane and E Carver Street, and provide maintenance and repair recommendations. Note that at a minimum, trash and debris shall be removed from inside and around the SCM to restore any lost functionality. Any trash and debris within the curb and gutter within the vicinity of the Tree Well units shall be removed. Task 3: Maintenance of SCMs Consultant will provide the following maintenance services for the project’s SCMs; Mowing: o Mow to original clearing limits defined by a mature tree line around the perimeter of the SCM. o Take any tree that is less than four inches in diameter. (Note that this excludes any street trees along Carver Street and screening/buffer trees planted along the boundary of the SCM. Refer to the planting schedule in Exhibit “B”.) o Mow to the pond perimeter where the orange fence is located that surrounds the pond. o Within the vicinity or within the SCM, including the SCM dam, clear the berms of any woody vegetation. o Mow to the pond edge (beyond the fence) and around the riser. The limit of pond mowing shall be everything beyond 5’ from the SCM water edge. o Mow around the outfall headwall and riprap pad. The limit of mowing around the pond outfall shall be everything within 5’ of the headwall and riprap pad. o Mow to the street back of curb. Mow around and leave the planted Waxhalls and Redbuds. The Landscape Buffer Typical Section shows the pattern of tree plantings. o Remove and haul off all debris and woody stems including illegally dumped material, inorganic and organic. o Mowed clippings that are finely chopped can remain. The result should be similar to a mown pasture with vegetation at 6” high. o Mow the median water quality swale from Carver to Old Oxford. o Upon completion of SCM repairs by the Contractor, return to mow the SCMs and median up to four times during that 12 month As-built period. Wetland 1 & 2 Pumping o Pump Wetlands 1 & 2 down to remove all water for the Contractor to make repairs to the pond. (Care should be taken to protect waterlily and other existing wetland plantings.)
