Background
The Maine Departnment of Transportation, a cabinet-level private agency, employs 1,800 Maine residents with many locations across the entire state.¹ With nearly 18,000 lane miles of highway in their transportation infrastructure, the Maine DOT’s primary focus is statewide transportation safety and the most reliable transportation systems possible with available resources. The initiation of two pilot programs in the fall of 2020 with Maine Standard Biofuels (MSB) began after months of research on lowering carbon emissions and researching qualified potential suppliers.¹
First, by directly replacing traditional number 2 heating oil with MSB’s Bio20 heating oil blend in the Main Office and Main Garage in Scarborough, Main DOT found that they could significantly reduce their carbon emissions without any major changes in their daily operations. In April 2021, the Southern Maine DOT then introduced, MSB’s biodiesel gradually into their diesel vehicle fleet. To ensure that there wouldn’t be any maintenance or performance issues they started by implementing a B10 blend, increasing gradually to a B20 blend of biodiesel. After this succssful pilot study, the Maine DOT expanded the region to include all Southern Maine locations.
Challenges
With a mission to responsibly provide customers with the safest and most reliable transportation system possible, Maine DOT also holds environmental sustainability at the forefront of their operations. In 2020, the Maine State Govornment issued the four year climate action plan, Maine Won’t Wait, to put Maine on a trajectory of becoming carbon neutral by 2045.²
By implementing such bold climate actions, the first challenge was identifying the share of CO₂ emissions by their source in order to pinpoint where improvements could be made. The state’s Lead By Example report found that the top producers of CO₂ in Maine were diesel, electricity, gasoline, and heating oil.² The Maine DOT continues to show green leadership and has taken the initiative to implement green practices across the state, saving energy and reducing emissions.
Implementation
After a favorable study with the direct biofuel replacement, the pilot project offices and garages found no negative effects to their facilities or fleets. According to the Director of Fleet Services, no modifications were needed for their furnaces, and there were no maintenance or performance changes reported in their fleet operations.³ The resulting data from the study was a clear reduction in CO₂ emissions in comparison to their traditional past practices. The Maine DOT then planned to model the pilot study by introducing these green practices into all of their Southern Maine locations. To date, MSB now services eight Southern Maine DOT locations with heating oil, and fifteen garages with on-road biodiesel blends for their fleets.
Resolution and Data
In total, the Maine DOT has utilized over 154,000 gallons of biofuel since December 2019. Between on-road biodiesel and biobased heating oil, the resulting impact has shown a 15% reduction in greenhouse gas emissions without the need for any major changes.³ A cumulative report of biofuel usage during this phase shows that the Maine DOT utilized 77,427.4 gallons of B20, 39,409 gallons of B15, and 37,393.1 gallons of B10; resulting in a total of 154,229.5 gallons of biofuel. According to the Biodiesel Emissions Calculator, the aggregate total usage of biofuel used by the Maine DOT, displayed in Table 1 (See Green Leaders Report), shows a total carbon impact of 472,610.17 lbs.⁴
The partnership with Maine Standard Biofuels that the Maine DOT initiated for their environmental impact endeavors has accomplished a significant reduction in their carbon footprint. The total carbon reduction is equivalent to the removing of 46.6 cars from the road, recycling 72.9 tons of waste instead of landfilling, or planting 3,545 trees shown in the Figure 1 below.⁵
If Maine continues on this trajectory, it’s no doubt that the DOT will be able to meet their projections to significantly reduce carbon emissions in this sector. These locations plan on continuing their efforts to work with Maine Standard Biofuels to increase their total carbon reduction while expanding the adoption of these practices throughout the state. By continuing this partnership, the Maine DOT’s adoption of sustainably sourced fuel directly contributes to our states effort to, “Lead By Example”.
“Wherever possible, we will make buildings more energy efficient and we will tap into renewable energy, helping us fight climate change and saving taxpayer money in the long-run. Today, we take another step toward fulfilling our state motto, Dirigo, I lead.”
-Governor Janet Mills