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California Department of Resources Recycling and Recovery Log-sheet Cal Recycle 100 I Street-Sacramento, ig 95814 Waste Permitting Compliance&Mitigation Division (Engineering Support Branch) Project: Foothill Sanitary Landfill Instrument: QED GA 5000, flow specification = 550 cc/min = 0.194 cu ft/ min Location: 6484 N Waverly Road, Linden, CA 95236 Serial #: G510512 Calibration Date: 3/25/2026 Date: 23-Sep-26 Field Staff: Garrett Backus Weather Conditions: 70 degrees F, clear Comments: Field Calibration 1: Fresh Air Bar. Pressure: 29.69 inches Hg Field Calibration 2: 4% 02, balance N2, Gasco, lot# 304-403408333-1, C of A on file Field Calibration 3: 15% CH4, 15% CO2, Gasco, lot# 304-403559228-1, C of A on file. • • Field Observations • • • • • • . . example 100 0.50 0.13628 GA-5000 0.0194 7.0 120S 12 0.75 0.03680 GA-5000 0.0194 1.9 9:50 AM 9:53 AM 70 0.0 0.0 20.9 0.5 78.6 N/A N/A Purged and measured with the QED QA 5000. 1201 51 0.75 0.15639 GA-5000 0.1059 1.5 9:53 AM 9:56 AM 70 0.0 0.0 20.3 0.5 79.3 N/A N/A Purged one well volume with GilAir 5 pump and then measured with QED QA 5000. Start and end times are with the QED. 120D 94 0.75 0.28824 GA-5000 0.1059 2.7 9:56 AM 9:59 AM 70 0.0 0.0 20.0 0.4 79.6 N/A N/A Purged one well volume with GilAir 5 pump and then measured with QED QA 5000. Start and end times are with the QED. 119S 12 0.75 0.04 GA-5000 0.0194 1.9 10:05 AM 10:09 AM 70 0.0 0.0 20.7 0.3 79.0 N/A N/A Purged and measured with the QED QA 5000. 1191 36 0.75 0.11 GA-5000 0.1059 1.0 10:09 AM 10:12 AM 70 0.0 0.0 19.7 0.5 79.8 N/A N/A Purged one well volume with GilAir 5 pump and then measured with QED QA 5000. Start and end times are with the QED. 119D 66 0.75 0.20 GA-5000 0.1059 1.9 10:12 AM 10:15 AM 70 0.0 0.0 19.7 0.4 79.8 N/A N/A Purged one well volume with GilAir 5 pump and then measured with QED QA 5000. Start and end times are with the QED. 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. (6) GilAir 5 Pump with flow of 3 = 3000 cc/min = 0.1059 cfm. Measured with the bottom of the sphere on the flow 3 line 9/24/2026 amc