The process usually requires 90 days to complete (from publication of solicitation to final Supplier Contract or Purchase order). ➢ Requests for Proposals (RFP).Pima County Community College District ("College") is seeking proposals from qualified firms to provide Chartered Ground Transportation Services. All submittals must be completed in ink or typewritten. One original shall be bound and single-sided. PROPOSAL SUBMISSION: An authorized agent of the Proposer must sign proposal.