Exhibit_E_Green_Infrastructure_Maintenance_Checklists.pdf
PDF 658 KB Posted
- Attached to
- Landscaping and Grounds Maintenance Services
- Solicitation number
- 2026-RFP-00070
- Issued by
- San Mateo County, California
About this file
These documents are four separate Inspection and Maintenance Checklists for stormwater management infrastructure: Bioretention Area, Flow-Through Planter, Tree Well Filter, and Pervious Pavement. The checklists provide comprehensive guidelines for weekly inspections and maintenance of various green stormwater infrastructure elements, with consistent structured approaches across different treatment measures. Each checklist includes specific defect categories, conditions triggering maintenance needs, expected maintenance actions, and desired results when maintenance is performed.
The checklists are designed to ensure optimal performance of stormwater treatment measures by addressing issues such as standing water, vegetation health, sediment accumulation, trash and debris, erosion, mulch coverage, and structural soundness. Common maintenance triggers include water not draining within specified timeframes (3-5 days), vegetation becoming dead or overgrown, exposed bare earth, sediment blockages, and surface damage. The documents emphasize weekly inspection and documentation, with maintenance to be conducted when specific conditions are met, ultimately aimed at maintaining the design specifications and functional integrity of each stormwater treatment measure.
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Bioretention Area Maintenance
Bioretention Area Inspection and Maintenance Checklist
Treatment Measure No.: Date of Inspection: Type of Inspection: □ Weekly □ Pre-Wet Season
□ After heavy runoff □ End of Wet Season
Inspector(s): □ Other:
Defect Conditions When Maintenance Is Needed
Maintenance
Needed? (Y/N)
Comments (Describe maintenance completed and if needed maintenance was not conducted, note when it will be done)
Results Expected When Maintenance Is Performed
1. Standing Water When water stands in the bioretention area between storms and does not drain within five days after rainfall.
There should be no areas of standing water once inflow has ceased. Any of the following may apply: sediment or trash blockages removed, improved grade from head to foot of bioretention area, or added underdrains.
2. Trash and Debris Accumulation
Trash and debris accumulated in the bioretention area.
Trash and debris removed from bioretention area and disposed of properly.
3. Sediment Evidence of sedimentation in bioretention area.
Material removed so that there is no clogging or blockage. Material is disposed of properly.
4. Erosion Channels have formed around inlets, there are areas of bare soil, and/or other evidence of erosion.
Obstructions and sediment removed so that water flows freely and disperses over a wide area. Obstructions and sediment are disposed of properly.
5. Vegetation Vegetation is dead, diseased and/or overgrown.
Vegetation is healthy and attractive in appearance.
6. Mulch Mulch is missing or patchy in appearance.
Areas of bare earth are exposed, or mulch layer is less than 3 inches in depth.
All bare earth is covered, except mulch is kept 6 inches away from trunks of trees and shrubs. Mulch is even in appearance, at a depth of 3 inches.
7. Miscellaneous Any condition not covered above that needs attention in order for the bioretention area to function as designed.
Meet the design specifications.
Property Address: Site Name:
Inspection and documentation of each treatment measure will occur weekly, and maintenance will occur when conditions are met
Flow-Through Planter Maintenance
Flow-Through Planter Inspection and Maintenance Checklist
Treatment Measure No.: Date of Inspection: Type of Inspection: □ Weekly □ Pre-Wet Season
□ After heavy runoff □ End of Wet Season
Inspector(s): □ Other:
Defect Conditions When Maintenance Is Needed Maintenance
Needed? (Y/N)
Comments (Describe maintenance completed and if needed maintenance was not conducted, note when it will be done)
Results Expected When Maintenance Is Performed
1. Vegetation Vegetation is dead, diseased and/or overgrown.
Vegetation is healthy and attractive in appearance.
2. Soil Soil too deep or too shallow. Soil is at proper depth (per soil specifications) for optimum filtration and flow.
3. Mulch Mulch is missing or patchy in appearance.
Areas of bare earth are exposed, or mulch layer is less than 3 inches in depth.
All bare earth is covered, except mulch is kept 6 inches away from trunks of trees and shrubs. Mulch is even in appearance, at a depth of 3 inches.
4. Sediment, Trash and Debris Accumulation
Sediment, trash and debris accumulated in the flow-through planter. Planter does not drain as specified.
Sediment, trash and debris removed from flow-through planter and disposed of properly. Planter drains within 3-4 hours.
5. Clogs Soil too deep or too shallow. Sediment, trash and debris accumulated in the flow-through planter. Planter does not drain within five days after rainfall.
Planter drains per design specifications.
6. Downspouts and Sheet Flow
Flow to planter is impeded. Downspouts are clogged or pipes are damaged. Splash blocks and rocks in need of repair, replacement or replenishment.
Downspouts and sheet flow is conveyed efficiently to the planter.
7. Overflow Pipe Does not safely convey excess flows to storm drain. Piping damaged or disconnected.
Overflow pipe conveys excess flow to storm drain efficiently.
8. Structural Soundness
Planter is cracked, leaking or falling apart. Cracks and leaks are repaired and planter is structurally sound.
9. Miscellaneous Any condition not covered above that needs attention in order for the flow-through planter to function as designed.
Meet the design specifications.
Inspection and documentation of each treatment measure will occur weekly, and maintenance will occur when conditions are met
Tree Well Filter Maintenance
Tree Well Filter Inspection and Maintenance Checklist
Treatment Measure No.: Date of Inspection: Type of Inspection: □ Weekly □ Pre-Wet Season
□ After heavy runoff □ End of Wet Season
Inspector(s): □ Other:
Defect Conditions When Maintenance Is Needed
Maintenance
Needed? (Y/N)
Comments (Describe maintenance completed and if needed maintenance was not conducted, note when it will be done)
Results Expected When Maintenance Is Performed
1. Vegetation Vegetation is dead, diseased and/or overgrown.
Vegetation is healthy and attractive in appearance.
2. Planting Mix Planting mix too deep or too shallow. Planting mix is at proper depth for optimum filtration and flow.
3. Mulch Mulch is missing or patchy in appearance.
Areas of bare earth are exposed, or mulch layer is less than 3 inches in depth.
All bare earth is covered, except mulch is kept 6 inches away from trunks of trees and shrubs. Mulch is even in appearance, at a depth of 3 inches.
4. Trash and Debris Accumulation
Trash and debris accumulated in the tree well filter. Filter does not drain as specified.
Trash and debris removed from tree well filter and disposed of properly.
Filter drains per design specifications.
5. Sediment Evidence of sedimentation in tree well filter.
Material removed so that there is no clogging or blockage. Sediment is disposed of properly.
6. Standing Water When water stands in the tree well filter between storms and does not drain within five days after rainfall.
There should be no areas of standing water once inflow has ceased. Any of the following may apply: sediment or trash blockages removed, overflow pipe repaired.
7. Overflow Pipe Does not safely convey excess flows to storm drain. Piping damaged or disconnected.
Overflow pipe conveys excess flow to storm drain efficiently.
8. Miscellaneous Any condition not covered above that needs attention in order for the tree well filter to function as designed.
Meet the design specifications.
Inspection and documentation of each treatment measure will occur weekly, and maintenance will occur when conditions are met
Pervious Pavement Maintenance
Pervious Pavement Inspection and Maintenance Checklist
Property Address: Site Name:
Treatment Measure No.: Date of Inspection: Type of Inspection □ Weekly □ Pre-Wet Season
□ After heavy runoff □ End of Wet Season
Inspector(s): □ Other:
Defect Conditions When Maintenance Is Needed
Maintenance
Needed? (Y/N)
Comments (Describe maintenance completed and if needed maintenance was not conducted, note when it will be done)
Results Expected When Maintenance Is Performed
1. Standing Water Water stands in the pervious pavement and does not drain within 30 minutes after storm event
There should be no areas of standing water once storm event has ceased.
Restorative surface cleaning with a vacuum sweeper and/or reconstruction of part of the pervious surface may be required.
2. Trash, or Sediment and Debris Accumulation
Trash, sediment or debris accumulated on pervious pavement
Trash and debris removed from pervious pavement and disposed of properly. Adjacent areas do not contribute to sediment and debris.
3. Damage Surface deformation or broken pavers Surface restored; no deformation or broken pavers.
4. Vegetation Weeds growing on pervious pavement No weeds on pervious pavement.
5. Underdrain Outlets Water accumulates due to trash/sediment accumulation in outlets.
No standing water observed. Clean underdrain outlets and cleanouts.
5. Miscellaneous Any condition not covered above that needs attention in order for the pervious pavement to function as designed.
Meets the design specifications.
Inspection and documentation of each treatment measure will occur weekly, and maintenance will occur when conditions are met
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