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<br /> <br /> <br /> <br /> <br /> <br />Emerald Ash Borer Management Plan <br />City of St. Anthony Village, MN <br />WSB Project No. 022315-000 Page 13 <br />Average age estimates can be completed by multiplying an “age factor” <br />by the tree’s DBH. The green ash’s age factor is 4 (Morton Arboretum). <br /> According to the USDA Forest Service’s i-Tree “My Tree” application, one 20” <br />diameter ash tree in good condition growing in the City of St. Anthony Village <br />produces myriad benefits to the community that can be quantified and <br />measured (itreetools.org). <br /> <br /> <br /> <br />Table 4: Tree Benefits from a 20” Diameter Good Condition Ash Tree over 20 <br />Years <br /> <br />The benefits include reductions in stormwater, electricity, natural gas, and uptake of <br />carbon dioxide along with improved air quality, and property values. When there are <br />thousands of ash trees lost in a community on public and private land during a short <br />period of time before a canopy can rebound, the lost benefits can compound. <br />One example of that effect occurred in one of the first communities hit by EAB in <br />Westland, Michigan. According to a study by Deborah McCollough published in the <br />January-March 2012 International Journal of Pest Management ; the removal of <br />Westland’s 3,000 municipal ash trees killed by EAB “led to a 33 percent increase in <br />outdoor water consumption, which subsequently caused the regional water authority <br />to levy a 10 percent surcharge on the City.” <br />In summary, the trunk injection of emamectin benzoate is preferred to other trunk <br />injections, spray, or soil-applied insecticides because: <br /> Research data indicates it is the most effective to kill EAB. <br />Carbon Dioxide Uptake $81.85 <br />Carbon Dioxide Sequestered (1) 959.85 pounds <br />Carbon Dioxide Equivalent (2) 3,519.47 pounds <br />Storm Water Mitigation $98.47 <br />Runoff Avoided 11,019.66 gallons <br />Rainfall Intercepted 37,928.53 gall ons <br />Air Pollution Removal $90.03 <br />Carbon Monoxide 3.48 ounces <br />Ozone 253.39 ounces <br />Nitrogen Dioxide 68.85 ounces <br />Sulfur Dioxide 21.65 ounces <br />Particulate matter 2.5 microns or less 12.88 ounces <br />T OTAL DOLLARS OVER 20 YEARS $262.11 <br />Benefits are based on USDA Forest Service research and are meant for guidance only. <br />Visit www.itreetools.org <br />All monetary values are DISPLAYED in US dollars. <br />1 For large trees sequestration is overtaken by CO 2 loss with decay/maintenance. <br />2 CO 2 equivalent is estimated by calculating how much atmospheric CO 2 is taken in by trees to <br />provide the carbon stored in the tissues of individual trees. <br />*Positive energy values indicate savings or reduced emissions occur when the tree is adjacent to a <br />building. <br />This location is supported by i -Tree. Localized data have been used to estimate its tree benefits.