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Mr. Joyesh Chandra <br /> April 11, 2023 <br /> Page 2 <br /> • For probes more than 20 feet deep, turn on sample pump, extract a minimum of one <br /> probe volume, observed and record methane, oxygen, and carbon dioxide gas <br /> concentrations, when readings have stabilized for 30 seconds. <br /> • Close test valve, disconnect sample instruments and secure sample location. <br /> GAS MONITORING WELL TESTING <br /> In accordance with the approved testing schedule, all perimeter GW probes are to be tested at a <br /> minimum, on a quarterly basis. On March 2, 2023, all perimeter gas monitor probes defined as GW <br /> Nos. 1 through 9 were tested. Test results (Table 1) indicated that all GW probes tested exhibited no <br /> methane gas concentrations during the monitoring event. The next required quarterly monitoring <br /> event, second quarter 2023 (April through June), is scheduled to be performed before the end of the <br /> month of June 2023. <br /> STANDARD PROVISIONS <br /> This report addresses conditions at the subject site during the test date only. Accordingly, we <br /> assume no responsibility for any changes that may occur subsequent to our monitoring which could <br /> affect the quantity of LFG at the subject site or adjacent properties. <br /> Should you have any questions, do not hesitate to contact Justin Ruhle at(209) 279-4418. <br /> Sincerely, <br /> L� 'X <br /> Rebecca L. Lucero Justin C. Ruhle <br /> Project Coordinator Project Manager <br /> SCS Field Services SCS Field Services <br /> cc M. Houghton <br /> J. Acevedo <br />