A resolution approving an amendment to a Master Purchase Order (MPO) between the City and County of Denver and Vance Brothers, LLC. The amendment increases the funds for tack oil used at the Denver Asphalt Plant by $2,250,000.00, bringing the new total to $3,000,000.00. The original MPO was for $750,000.00. There is no change to the length of the MPO. Vance Brothers, LLC will supply and load tack oil, specifically CSS-1H Cationic Slow Setting Emulsified Asphalt and CRS2 Cationic Rapid Setting Emulsified Asphalt, into City trucks at vendor facilities.