Specifications include, but are not limited to: A. Supplier shall warrant that all fuels sold to the County shall be of high quality, with no more than a 10% ethanol additive as federally mandated, and suitable for the intended use. Supplier shall agree to provide Union County with a continuous supply of Regular Unleaded Gasoline (Octane-87) and diesel fuels #1 (or 1-D) or #2 (or 2-D) depending on the season. A winter additive is acceptable. We have no specific blend ratio, we just need fuel that will burn in cold weather. B. Supplier, at its own expense, shall assign a Purchasing-card, Credit-card, or Account card for each bulk tank location. The County employee, assigned as tank manager, may then use the card to order fuel without a Purchase Order being issued, and the appropriate amount will be charged to Union's account. • We will accept another form of order verification that can provide the same level of protection against fraudulent orders. C. The formula for calculating the final price to be paid by County would be: Oil Price Information Service (OPIS Gross Price) daily closing average price for lowest available unbranded rack the day prior to the delivery of fuel, +/- Margin/Markup above/below OPIS Gross Price daily closing average price = Calculated price per gallon to be paid by the County. The OPIS rack city to be used to determine the daily closing average price-Charlotte, NC. Monday deliveries will use the OPIS daily closing average price from the prior Saturday. The supplier will be required to show proof of the OPIS rack price for a given date upon request of the County.