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Mr. Brendan Kenny <br />April 13, 2023 <br />Page 2 <br />limit forth is instrument is approximately 0.10 percent by volume. Compliance testing for gas <br />monitoring probes is included below. <br />Gas Monitoring Probe Testing Procedures <br />• Connect sample tubing, open test valve; observe pressure and record data. <br />• For probes 20 feet deep or less, turn on sample pump, observe and record methane, oxygen, <br />and carbon dioxide gas concentrations, when readings have stabilized for 30 seconds. <br />• For probes more than 20 feet deep, turn on sample pump, extract a minimum of one probe <br />volume, observed and record methane, oxygen, and carbon dioxide gas concentrations, when <br />readings have stabilized for 30 seconds. <br />• Close test valve, disconnect sample instruments and secure sample location. <br />GCCS OPERATIONS AND MAINTENANCE <br />SCS Engineers (SCS) is contracted by Forward to conduct the Operation and Maintenance (0&M) of <br />the GCCS at the Landfill. During the first quarter of 2023, the following 0&M activities were <br />conducted: <br />• Quarterly monitoring of LFG probes was conducted; <br />• Ongoing wellfield monitoring and tuning of the GCCS was performed; <br />• Inspection of condensate sumps and pumps for proper operations was conducted. Any <br />required maintenance as a result of the inspections was performed; <br />• There were no known GCCS system failures during the first quarter of 2023. The GCCS <br />operated continuously for 24 hours per day. The flare station experienced standard <br />malfunction, shutdown and startups, including coordinated shutdowns for GCCS construction <br />of perimeter header improvements, but there was no significant downtime; and <br />• The instantaneous total flow rate of LFG on March 17, 2023, was 1,402 standard cubic feet <br />per minute (scfm) at the LFG-to-energy (LFGTE) facility, 1,510 scfm at Flare A-1, and 1,510 <br />scfm at Flare A-2. <br />