This Request for Proposal (RFP) seeks proposals from qualified Offerors to provide calibration and leak testing services for Troxler 3430 or 3440 nuclear density gauges and decommissioning of Troxler nuclear density gauges, in accordance with the requirements and specifications stated herein. The Offeror should be able to provide new Troxler 3430 nuclear density gauges for purchase. The contract period will be from Notice of Contract Award through one (1) year, with four (4) additional one-year renewal option periods or any portion thereof. MoDOT will receive bids electronically through MissouriBUYS, via mail, UPS, or FEDEX. It is required to contact the buyer of record via e-mail at Nanci.Grannemann@modot.mo.gov.