4.4 EAW Attachment - Laserfiche WebLink

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Page 47 Table 33. Off-site Waste Management - Commercial Commercial Type Municipal Solid Waste Generation Estimated Gas Station Footprint1 Emission Factor Daily Total (tons of CO2eq) Gas Station 0.9 lbs./100 sqft/day 5,000 sqft 0.58 tons of CO2eq/ short ton 0.0131 Retail 0.046 lbs./sqft/day 20,000 sqft 0.2668 Total Annual Emissions 102.1453 tons of CO2eq Total Lifecycle Emissions 5,107.2650 tons of CO 2eq 1 Based on concept plan. 2 Expected lifecycle (50-year) Atmospheric Removals – Scope 1 Carbon removals from the atmosphere act to offset the emissions of CO2 to the atmosphere. For the sake of calculating emissions, it was estimated that ± 26.96 acres of existing woodland will be preserved (based on the current site plan). The development will also include tree plantings throughout the development. Trees will be planted/preserved throughout the greenway corridor. The development will abide by Chapter 30 Section 30-936 of the Elk River City Code. Two trees are required in all single-family uses. In an effort to convert the number of trees planted to an acreage, it was estimated that the future planted trees equate to at least six acres. The U.S. EPA’s Best Practices for Including Carbon Sinks in GHG Inventories, carbon sequestration rates for forest preservation, and afforestation (planting trees on lands previously not in forestry) were utilized (50). The estimated carbon sequestration rate in the U.S. is estimated between 0.66-2.87 tons of CO2/acre/year. The carbon sequestration rate in the U.S. is dependent of the existing carbon stock, and because a tree survey was not completed and the status of the woodland is unknown, the 0.66 tons of CO2/acre/year rate was utilized (Table 36). Table 34. Atmospheric Removals Forestry Practice Carbon Sequestration Rate Trees Provided/Preserved Annual Atmospheric Removal Afforestation1 0.66 tons of CO2/acre/year ± 6 acres of planted trees 3.96 tons of CO2 Forest Preservation2 0.66 tons of CO2/acre/year ± 26.96 acres of estimated tree preservation 17.79 tons of CO2 Total Lifecycle Estimate3 1,087.50 tons of CO2eq 1 Based on an estimate of tree planting required by the City code. 2 Based on aerial estimates of tree preservation based on the current concept plan. 3 Expected lifecycle 50 years. Mitigation The residential homes are anticipated to include energy efficient appliances. On-site landscaping will absorb a portion of greenhouse emissions and reduce the local urban heat island effect. Consideration of additional mitigation opportunities will continue through planning, design, and permitting.