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Mr. Brendan Kenny <br />October 13, 2022 <br />Page 2 <br /> o GP-10D, GP-10M, GP-10S <br />o GP-11D, GP-11M, GP-11S <br />o GP-12D, GP-12M, GP-12S <br />o GP-13D, GP-13S <br />o GP-14D, GP-14S <br />o GP-15D, GP-15M <br /> <br />The TO-15 sampling of these probes is completed on an annual basis and will be performed later in <br />the year during the fourth quarter, in conformance with the Order. <br /> <br />COMPLIANCE TESTING INSTRUMENTATION AND METHODS <br />Testing for methane gas, oxygen gas, carbon dioxide gas and pressure was performed using a <br />Landtec GEM-5000 Gas Analyzer calibrated to methane gas. The instrument measures combustible <br />gas concentrations as a percentage by volume (0 to 100 percent) in the gas sampled. The detection <br />limit for this instrument is approximately 0.10 percent by volume. Compliance testing for gas <br />monitoring probes is included below. <br /> <br />Gas Monitoring Probe Testing Procedures <br />• Connect sample tubing, open test valve; observe pressure and record data. <br /> <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 /> <br />• For probes more than 20 feet deep, turn on sample pump, extract a minimum of one probe <br />volume, observe and record methane, oxygen, and carbon dioxide gas concentrations, when <br />readings have stabilized for 30 seconds. <br /> <br />• Close test valve, disconnect sample instruments and secure sample location. <br /> <br /> <br />GCCS OPERATIONS AND MAINTENANCE <br /> <br />SCS is contracted by Forward to conduct the Operation and Maintenance (O&M) of the GCCS at the <br />Landfill. During the third quarter of 2022, the following O&M activities were conducted: <br />• Quarterly monitoring of LFG probes; <br /> <br />• Ongoing wellfield monitoring and tuning of the GCCS; and <br /> <br />• Inspection of condensate sumps and pumps for proper operations was conducted. Any <br />required maintenance as a result of the inspections. <br /> <br />There were no known GCCS system failures during the third quarter of 2022. The GCCS operated <br />continuously for 24 hours per day. The flare station experienced standard malfunction, shutdown <br />and startups, but there was no significant downtime. <br />