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City of Stockton — Austin Road Landfill TL A68102.01 <br />February 21, 1995 Page 3 <br />"MONEDWO 301614WOU <br />Field activities are summarized in the following subsections. <br />3.1 Soil Gas Monitoring. Soil gas concentrations were measured using a Gastechtor Model No. <br />1314SMPN calibrated for methane. Each gas probe was purged for five minutes. After the five <br />minute purge time, oxygen and lower explosive limit (LEL) percentages were recorded. Methane <br />gas concentrations measured in site structures were recorded when the readings stabilized. <br />Methane gas monitoring results for the first quarter of 1995 are summarized in Table 2. <br />Notes: 100% LEL = 5% Methane <br />::»;:;>.>::;:>.:;:>:>.:........... .................. <br />PLR�aT.LFL.................... .................... <br />SGP1 <br />0 <br />SGP2 <br />38 <br />SGP 3 <br />SGP4 <br />0 <br />SGP5 <br />0 <br />....................................................................................................................... <br />SGP6 <br />........................................................................................................................ <br />....................................................................................................................... <br />_........................................................................ <br />....................................................................................................................... <br />SGP7 <br />0 <br />SGP8 <br />0 <br />SGP9 <br />0 <br />SGP10 <br />0 <br />SGP11 <br />37 <br />SGP12 <br />0 <br />Scale House <br />0 <br />Cargo Box 1 <br />0 <br />Cargo Box 2 <br />0 <br />Cargo Box 3 <br />0 <br />Notes: 100% LEL = 5% Methane <br />