To register as a vendor and view current bids, please visit the Purchasing Services webpage. Below you will find all of our current open RFI, RFP, and RFQ bids as well as instructional videos for the budget templates.Prequalification questionnaires must be submitted 10 days prior to a project's bid due date or they cannot be processed for that project. Compensation: By accepting this Purchase Order (PO), the. CCTA uses PlanetBids for the procurement process. Visit PlanetBids to sign up, download the RFP and other documents, and submit proposals. This page is home to all requests for proposal (RFPs) for new Contra Costa Health (CCH) projects.