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Mr. Joseph Lipka December 27, 2017 • Page 2 For probes 20 feet deep or less, turn on sample pump, observe and record methane, oxygen, and carbon dioxide gas concentrations, when readings have stabilized for 30 seconds. • For probes more than 20 feet deep, turn on sample pump, extract a minimum of one probe volume, observed and record methane, oxygen, and carbon dioxide gas concentrations, when readings have stabilized for 30 seconds. • Close test valve, disconnect sample instruments and secure sample location. GAS MONITORING WELL TESTING In accordance with the approved testing schedule, all perimeter monitoring probes are to be tested at a minimum, on a quarterly basis. On December 11, 2017, all accessible perimeter Gas Monitoring Probes defined as Nos. GP -01 A, GP -02A, GP -03 and GP -04A through GP -08A were tested for the presence of LFG. Test results (Table 1) indicated that all monitoring probes tested exhibited methane gas concentrations below the LEL (5 percent by volume) or no methane gas was detected. These results indicated that the subject site perimeter probes are in compliance with the requirements of Title 27 CCR Article 6. Also, on December 11, 2017, SCS, at the direction of the client, performed replacement of the • previously mentioned damaged, by others, monuments for Perimeter Monitoring Probe Nos. GP - 04A and GP -08A restoring proper security and monitoring capabilities. SCS is scheduled to perform the first quarter monitoring of 2018 (January through March) of the monitoring probes by the end of the month of March 2018. STANDARD PROVISIONS This report addresses conditions at the subject site during the test dates only. Accordingly, we assume no responsibility for any changes that may occur subsequent to our monitoring which could affect the quantity of LFG at the subject site or adjacent properties. 40