C250322_IFB_Exhibit_A_SOW_APPDX_A-Methane_Detection_Equip_List.docx

This document is an Exhibit A Appendix detailing methane detection equipment specifications for the Orange County Transportation Authority's Methane Detection System Service and Maintenance contract. The scope encompasses service and maintenance of existing methane detection systems installed across five OCTA facilities: Garden Grove Base (44 SEC-3100 sensor transmitters with SEC 3500 Controller), Anaheim Base (56 SEC-3100 sensor transmitters with SEC 3500 Controller), Irvine Sand Canyon Base (26 Millennium Hydrocarbon Gas SEC-3100 sensor transmitters with General Monitor Model IR5000 Open Path Hydrocarbon Gas Monitoring System), Santa Ana Base (8 IR Combustible Sensors, 52 Model 5200-28-IT units, 2 Model 5200-02-IT units, and Sierra Monitor Corp Sentry Controller System with Allen Bradley SLC 500 components), and Laguna Hills Transportation Center (18 Model 5100-02-IT units with Sierra Control Panel 5000-16-IT). The contract is for a four-year term with a total budget of $260,000 and is designated as a prevailing wage contract.

The equipment list serves as an informational reference only and is not intended to limit the scope of required services and maintenance. Qualified contractors must be capable of servicing multiple manufacturer systems including Sierra Monitor Corporation and General Monitor equipment across all five geographic locations. The contract represents an ongoing operational maintenance commitment for critical methane detection infrastructure at transportation authority facilities in California.