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California Department of Resources Recycling and Recovery Log-sheet Calftcydeo1001 I Street-Sacramento,CA 95814 Waste Permitting Compliance&Mitigation Division (Engineering Support Branch) Project: North County Landfill Instrument: QED GA 5000, flow specification = 550 cc/min = 0.194 cu ft/ min, field calibration completed Location: 17720 E Harney Lane, Lodi, CA 95240 Serial #: G509028 Calibration Date: 9/26/2025 Date: 9/16/2026 Field Staff: Garrett Backus Weather Conditions: Clear, 63 degrees F Comments: Field Calibration 1: Fresh Air Bar. Pressure: 29.75 inches Hg Field Calibration 2: 4% 02, balance N2, manufacturer Gasco, lot# 304-403408333-1, C of A on file Field Calibration 3: 15% CH4, 15% CO2, manufacturer Gasco, lot#304-403559228-1, C of A on file. • • Field Observations example 100 0.5 0.136 GA-5000 0.0194 7.02 is 5.5 0.1875 0.001 GA-5000 0.0194 0.05 upper segment is 2.5 1.0000 0.014 GA-5000 0.0194 0.70 lower segment is 8 0.015 GA-5000 0.76 8:43 AM 8:45 AM 63 0.0 0.0 19.0 2.6 78.4 N/A N/A total purge volume and time 11 25.5 0.1875 0.005 GA-5000 0.0194 0.25 upper segment 11 2.5 1.0000 0.014 GA-5000 0.0194 0.70 lower segment 11 28 0.019 GA-5000 0.95 8:45 AM 8:48AM 63 0.0 0.0 20.7 0.1 79.1 N/A N/A total purge volume and time 1 D 44.5 0.1875 0.009 GA-5000 0.0194 0.44 upper segment 1 D 2.5 1.0000 0.014 GA-5000 0.0194 0.70 lower segment 1 D 47 0.022 GA-5000 1.14 8:48AM 8:50 AM 63 0.0 0.0 20.7 0.2 79.1 N/A N/A total purge volume and time 3S 8.5 0.1875 0.002 GA-5000 0.0194 0.08 upper segment 3S 2.5 1.0000 0.014 GA-5000 0.0194 0.70 lower segment 3S 11 0.015 GA-5000 0.79 8:22 AM 8:24 AM 63 0.0 0.0 17.7 1.8 80.5 N/A N/A total purge volume and time 31 18.5 0.1875 0.004 GA-5000 0.0194 0.18 upper segment 31 2.5 1.0000 0.014 GA-5000 0.0194 0.70 lower segment 31 21 0.017 GA-5000 0.89 8:24 AM 8:27 AM 63 0.0 0.0 19.7 0.8 79.5 N/A N/A total purge volume and time 3D 26 0.1875 0.005 GA-5000 0.0194 0.26 upper segment 3D 2.5 1.0000 0.014 GA-5000 0.0194 0.70 lower segment 3D 28.5 0.019 GA-5000 0.96 8:27 AM 8:30 AM 63 0.0 0.0 20.8 0.1 20.8 N/A N/A total purge volume and time Notes: (1)Yellow highlighted columns are calculated from non-highlighted inputted data. (2) Purge time: to determine seconds, multiply the number after decimal by 60. For example, for 1.2 minutes, multiply 0.2 by 60 = 12. Total purge time then is 1 minute, 12 seconds. (3) Start Time: Record time when meter is turned on to purge. (4) End Time: Record time when final measurements are taken. (5) Initial CH4 is the highest reading exhibited anytime during the purge window. 9/21/2026 amc