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Project:Foothill Sanitary Landfill Instrument:QED GA 5000, flow specification = 550 cc/min = 0.194 cu ft / min, field calibration done at time of sampling <br />Location:6484 N Waverly Road, Linden, CA 95236 G509028 Calibration Date: <br />Date:4/9/2026 Field Staff:Garrett Backus <br />Weather Conditions:Clear, 54 degrees F Comments:Field Calibration 1: Fresh Air <br />Bar. Pressure:29.55 inches <br /> <br />Balance <br />(%) <br />H2S <br />(ppm) <br />example 100 0.5 0.14 GA-5000 0.0194 7.0 <br />106S 10 1 0.05 GA-5000 0.0194 2.8 7:28 AM 7:31 AM 54 0.0 0.0 0.7 78.6 N/A N/A <br />106I 61 1 0.33 GA-5000 0.0194 17.1 7:31 PM 7:50 PM 54 0.0 0.0 0.4 78.4 N/A N/A <br />106D 119 1 0.65 GA-5000 0.0194 33.4 7:50 PM 8:24 AM 54 0.0 0.0 0.3 78.5 N/A N/A <br />0.00 GA-5000 0.0194 0.0 0.0 0.0 N/A N/A <br />0.00 GA-5000 0.0194 0.0 0.0 0.0 N/A N/A <br />0.00 GA-5000 0.0194 0.0 0.0 0.0 N/A N/A <br />Notes: <br />(1) Yellow highlighted columns are calculated from non-highlighted inputted data. <br />(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. <br />(3) Start Time: Record time when meter is turned on to purge. <br />(4) End Time: Record time when final measurements are taken. <br />(5) Initial CH4 is the highest reading exhibited anytime during the purge window. <br />Probe ID <br />CO2 <br />(%) <br />End <br />Time4 <br />Probe Purge Calculations <br />One Purge <br />Volume (ft3) <br />Probe <br />Depth (ft) <br />Inside <br />Probe <br />Diameter <br />(inches) <br />O2 <br />(%) <br />Meter pump <br />rate (cfm) <br /> Initial CH4 <br />(%)(5) <br />Temp <br />(° F) <br />Monitoring Data <br />Serial #: <br /> CH4 <br />(%) <br />21.2 <br />Which gas <br />meter? <br />Purge <br />Time2 <br />(min) <br />Start <br />Time3 <br />Field Calibration 3: 15% CH4, 15% C02, lot# 304-403559228-1, C of A on file. <br />Field Calibration 2: 4% O2, balance N2, lot # 4517081, C of A on file <br />9/26/2025 <br />CO <br />(ppm) <br />Field Observations <br />21.2 <br />20.7 <br />California Department of Resources Recycling and Recovery <br />1001 I Street -Sacramento, CA 95814 <br />Waste Permitting Compliance & Mitigation Division <br />(Engineering Support Branch) <br />Log-sheet <br />4/9/2026 amc