Fuel use and renewable share, Route 781, Saddle Crossing

Sources

• Arbor_Fleet_Transactions_2024-10-01_2026-09-30.xlsxFleet card export for 18 cards: card, site, product, gallons and amount per fueling1,440 rows
• Carver_Fuel_Invoices_Oct2024-Sep2026.pdfMonthly invoices for bulk deliveries to the site tanks24 invoices, 25 pages
• Carver_Delivery_Tickets_BOL_Tank1_Tank2.pdfDelivery ticket and bill of lading per drop: product, net gallons, tank and product transfer statement87 tickets
• Site_Tank_Meter_Log_2024-10_2026-09.csvFuel management system issues per unit and month13 units
• SP-07_Renewable_Diesel_Use_and_Fuel_Reporting.pdfSpecial provision: contract-year minimums, crediting rules, documentation and quarterly reporting9 pages
• Form_SR-4_Quarterly_Sustainability_Report_Fuel.xlsxThe Town’s report form19 fields
• Equipment_and_Vehicle_List_Route781.xlsxUnits, card numbers and assigned site tank31 units
• EPA GHG Emission Factors Hub, January 2025Table 2, Mobile Combustion CO₂; Table 5, CH₄ and N₂O for non-road vehicles; Table 11, Global Warming Potential (AR5)5 pages

Method

1. The card export was read row by row and each card matched to a unit through the equipment list. The product code sets the fuel: R99, B20 or ULSD.
2. Invoices and delivery tickets were read per drop: date, tank, product, net gallons and whether the ticket carries a product transfer statement with the renewable content.
3. Card lines on the supplier invoices were matched against the card export on card number, date, time and gallons. Matches count once.
4. Renewable share is credited renewable content divided by total diesel purchased, per quarter and contract year, as SP-07 sets out: R99 at 99%, B20 at 20%. R99 without a product transfer statement counts as petroleum diesel.
5. Emissions are reported in metric tons of CO₂e, the reporting unit the Hub describes as typical. Fossil CO₂ applies the Hub’s Diesel Fuel factor, 10.21 kg/gal (Table 2), to the petroleum share of each fuel. CH₄ and N₂O apply the Table 5 factors for construction/mining diesel equipment, 1.01 g CH₄/gal and 0.94 g N₂O/gal, to every gallon, renewable or petroleum, converted with the Hub’s 100-year GWPs of 28 and 265 (Table 11, IPCC AR5): 0.277 kg CO₂e/gal. Biogenic CO₂ from the renewable share is reported on its own line, outside the CO₂e total.
6. The tank meter log allocates site-tank fuel to each unit. Units on Tank 1 get the quarter’s credited share of R99 deliveries.
7. Form SR-4 was filled in from the calculation, with a source for each field.

Assumptions and limitations

• The share is by volume of diesel purchased, per SP-07, not by energy content.
• Renewable content is taken from the product: 99% for R99 and 20% for B20, as SP-07 credits them.
• Whether R99 can be supplied reliably to the job in Virginia, and what a product transfer document must state for its renewable content to count, are taken from SP-07 and Carver’s tickets. Neither has been checked against supplier terms or federal and state fuel documentation rules.
• The Hub has no renewable diesel row in Table 2, so its biogenic CO₂ uses the Diesel Fuel factor. Table 5 has no biodiesel or renewable diesel rows, so the diesel equipment factors also apply to R99 and B20.
• The card export has no odometer readings, so the per-mile on-road factors in Table 4 cannot be used. Dump trucks, service trucks and pickups also get the per-gallon equipment factors, which likely overstates their CH₄ and N₂O. CH₄ and N₂O are under 3% of the CO₂e total for petroleum diesel.
• Factors are tank-to-wheel combustion emissions only, as in the Hub. Upstream fuel production is not included.
• Site-tank inventory change is not part of the report. The vehicle view shows the difference between delivered and issued gallons.
• Subcontractor units that do not fuel on the contractor’s cards or from the site tanks are not included.
• The records cover Oct 1, 2024 through Sep 30, 2026. Contract Year 3 (60% minimum) began Oct 1, 2026 and goes in the next report.