Laserfiche WebLink
PERIMETER LFG MIGRATION MONITORING WELL DATA <br />CORRAL HOLLOW LANDFILL <br />Date:1/27/2025 9:00AM Ken Espinoza <br />Weather Conditions Gas Testing Apparatus Utilized:GEM 5000 <br />Ambient Temp: 46 ° F Inches Hg <br />Wind Direction:SE Wind Speed: 8 MPH <br />Weather: Sunny <br />Name <br />Methane <br />(% by vol) <br />Carbon <br />Dioxide <br />(% by vol) <br />O2 <br />(% by vol) <br />Balance <br />(% by vol) <br />Pressure <br />(Inches <br />W.C.)Comments <br />GW-1D 0.0 0.1 20.8 79.1 -0.17 <br />GW-1M 0.0 0.4 20.6 79.0 -0.26 <br />GW-1S 0.0 0.3 20.6 79.1 -0.22 <br />GW-2D 0.0 0.8 18.5 80.7 -0.15 <br />GW-2M 0.0 1.0 17.5 81.5 -0.23 <br />GW-2S 0.0 0.2 21.0 78.8 -0.17 <br />GW-3D 0.0 0.7 20.7 78.8 -0.27 <br />GW-3M 0.0 0.5 20.9 78.6 -0.14 <br />GW-3S 0.0 0.2 21.3 78.6 -0.18 <br />GW-4D 0.0 0.2 20.2 78.5 -0.03 <br />GW-4M 0.0 0.4 18.4 79.6 -0.03 <br />GW-4S 0.0 0.2 19.5 81.2 -0.04 <br />GW-5D 0.0 0.9 19.7 80.3 -0.06 <br />GW-5M 0.0 0.8 19.7 79.4 -0.05 <br />GW-5S 0.0 1.3 19.4 79.5 -0.27 <br />GW-6D 0.0 1.3 19.7 79.3 -0.31 <br />GW-6M 0.0 1.5 19.6 79.0 -0.26 <br />GW-6S 0.0 0.7 19.5 78.9 -0.76 <br />GW-7M 0.0 3.5 16.8 79.8 -0.04 <br />GW-7S 0.0 0.4 20.1 79.7 -0.11 <br />GW-8S 0.0 0.8 19.5 79.5 -0.11 <br />GW-8D 0.0 0.1 20.5 79.7 -0.14 <br />GW-9D 0.0 0.2 20.4 79.4 -0.38 <br />GW-9M 0.0 1.1 19.6 79.3 -0.12 <br />GW-9S 0.0 3.1 18.5 78.4 -0.12 <br /> GAS TESTING INSTRUMENTATION AND METHODS <br />Testing for methane gas, oxygen gas, carbon dioxide gas and pressure was performed using a Landtec GEM-5000 <br />Gas Analyzer calibrated to methane gas. This instrument measures combustible gas concentrations in air directly on <br />either of two scales, the first as percent by volume of the lower explosive limit (LEL) of methane gas in air (0 to 5 <br />percent); the other as percent by volume (0 to 100 percent) in the gas sampled. The detection limit for this <br />instrument is approximately 0.10 percent by volume. <br />Gas monitoring well testing procedures are as follows: <br />• Connect sample tubing, open test valve, observe pressure, and record data. <br />• For probes 20 feet deep or less, turn on sample pump, observe and record methane, oxygen, and carbon dioxide <br />gas concentrations, when readings have stabilized for 30 seconds. <br />• For probes more than 20 feet deep, turn on sample pump, extract a minimum of one probe volume, observed and <br />record methane, oxygen, and carbon dioxide gas concentrations, when readings have stabilized for 30 seconds. <br />• Close test valve, disconnect sample instruments and secure sample location. <br />Barometric Pressure: 30.18 <br />Certified By: <br />N:\1Corral Hollow\LFG Migration Monitoring\Perim Monitoring\2025\CH_Perim LFG Mig Monit 1st Qtr 2025 Revised_10-24-11