This document provides instructions to bidders for a contract related to preventive maintenance and repair services for compressed breathing air systems. It covers various aspects such as bid submission, inquiries, exceptions to specifications, site inspection, pricing, proprietary information, authority to bind the firm, and bid preparation. Bidders are required to submit firm bids for county acceptance, with a minimum validity period of ninety days. The document emphasizes that any trade secrets or proprietary information shared by bidders will be protected and not disclosed under the Virginia Freedom of Information Act. It also outlines guidelines for signing and submitting bids, stating that bids received after the specified acceptance date and time will not be considered. Additionally, the document addresses the correction or withdrawal of bids and the cancellation of awards under competitive sealed bidding.