COMPLIANCE INFO_1996-2003 - Laserfiche WebLink

Home Browse Search

v Landfill Ga. Austin Road Landfill 9ration and Control Evaluation Table 2 Gas Header Line Data Austin Road Landfill, Stockton, California 6130198 Vacuum Flow CH, CO2 N OZ Data Point in-water Wm) At Co-gen Plant -4.5 to-4.8 290 57.8 37.9 4.2 0.1 Near Co-gen Plant -4.15 na 54.0 na na na Bottom of Old Header -3.40 na 55.0 na na na Bottom of Haul Road -3.00 na 54.0 na na na Between 34&36 -1.63 na 57.0 na na na Condensate Knockout -0.80 na 59.5 na na na Table 3 Soil Gas Probe Data Austin Road Landfill, Stockton, California 6/30/98 Well Pressure CH4 Probe ID in-water SGP9 0.05 4.5 SGP10 0.04 0.0 SGP11A 0.27 60.0 SGP12A 0.08 54.0 SGP13 0.02 29.0 SGP14 0.07 11.0 Gas Migration Plume Soil gas probe data obtained during this monitoring event was consistent with data collected previously during the first half of 1998. Elevated methane concentrations detected at SGP11A and SGP12A indicate extensive off-site migration from the northern landfill waste boundary along the eastern end of the perimeter. Methane concentrations decrease as gas travels through the vadose zone towards SGP13 and SGP14,but are still above the compliance level of 5%measured as methane. Off-site gas migration control is being achieved on the western half of the site along the northern boundary as indicated by the non-detect recorded for methane at SGP10 and 4.5% methane at SGP9A,which is below the compliance limit. Expansion of the gas extraction system will target migration control along the northern perimeter of the waste fill from several hundred feet west of SGP14 to the northeast corner of the site. Gas control influence will extend through the depth of fill,which is approximately 30 feet below ground surface. Increased understanding of the geology in the vicinity of the soil gas probes SGP11A through SGP14 will be developed from a review of the drilling logs developed during the installation of the soil gas probes. CDM Camp Dresser&McKee 3 W9825=015