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| Provide parking lot and site retrofits that allow for increased onsite stormwater and snow melt infiltration, water quality filtration, and may include interactive health and wellness functions. Combined, the retrofits would provide marked improvements in site aesthetics & site efficiency, while demonstrating Corporate Ecological Responsibility. |
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| Site Analysis |
- In conjunction with corporate environmental staff;
- Would determine viable outfall retrofit sites for bio-retention system candidates, and establish natural drainage patterns.
- Work with Health and Wellness Manager to investigate possible wellness facilities that might work in tandem with the stormwater program.
- Assist in Grant Writing.
- Provide support for Municipal and State Permitting.
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| Design / Build |
Provide engineered plans, hydrological analysis, system design, and would build the entire retrofit construction project, in accordance with local and state environmental order of conditions, local building codes, and corporate campus standards.
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| Annual Maintenance |
| Siltation monitoring and remediation: |
The bio-retention system captures Total Suspended Solids from influent flows that pass beyond conventional sump structures or from parking lot sheetwash conditions. If the siltation layer becomes too thick, it will choke out the plant material. Annual Maintenance includes removal of the siltation layer back to the original root zone mix. A minimum of 80% removal of TSS from influent flows would be the benchmark in the Operating Management Plan. Actual TSS removal percentage should be in the 90% level.
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| Plant maintenance: |
Conditions are harsh and vary greatly from site to site. Sometimes certain plant species do not perform well in specific environments and need to be replaced with a different species or varietals. Plant material may need periodic cutting, division, or may need intermittent low level organic fertilization.
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| Monitoring of Soil and Water: |
Corporate Environmental Staff would determine the need or the desired level of monitoring. As a monitoring benchmark, annual soil samples would be collected and tested for concentrations of Sodium (NA), Dissolved Inorganic Nitrogen (DIN), Total Phosphorus (TP), ph, Total Petroleum Hydrocarbons in the Diesel range
(TPH-D), and dissolved metals specifically Total Zinc (ZN). Influent and Effluent water samples would be tested for: TSS, DIN, TP, TPH-D, ZN, ph, and Hydrogen ions.
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| Photo analysis monitoring: |
Photos are taken to monitor plant growth, density, and seasonal effect. If applicable they are also used to demonstrate Storm Water Management Phase II compliance.
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