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0LFR <br /> LEVINE-FRICKE <br /> August 27, 2002 001-07979-00-002 <br /> 9ECIS DD <br /> Mr. Robert McClellon AUG 2 8 2002 <br /> San Joaquin County Environmental Health Division ENVIRONMENT HE>aLi H <br /> 304 East Webber Avenue, 3rd Floor PERMIT/SERVICES <br /> HEAL <br /> Stockton, California 95202 <br /> Subject: Third Quarter 2002 Soil Gas Monitoring Report, Austin Road Landfill, San Joaquin <br /> County, California <br /> Dear Mr. McClellon: <br /> This letter report presents results of soil gas monitoring conducted by LFR Levine-Fricke (LFR) <br /> on behalf of Forward Incorporated (Forward) at the Austin Road Landfill in San Joaquin County <br /> during the third quarter of 2002. Forward has retained LFR to conduct quarterly soil gas and <br /> water quality monitoring at the Austin Road Landfill. Soil gas monitoring was conducted on <br /> August 12, 2002 at the scale-house and soil gas probe locations presented on Figure 1. <br /> Due to activities associated with the redirection of Littlejohn Creek on Austin Road Landfill <br /> property, soil gas probes SGP-8A, SGP-9A, SGP-10B, and SGP-14 have been abandoned. <br /> According to Forward personnel, these probes will be replaced after creek relocation activities are <br /> completed. <br /> Procedures <br /> Concentrations of methane, oxygen, and carbon dioxide within the eight remaining soil gas probes <br /> and within the scale house were monitored using a calibrated Landtec GEM 2000 gas analyzer and <br /> extraction monitor (GEM). The GEM was certified as calibrated to factory specifications by the <br /> rental supplier, EquipCo, prior to each sampling event. <br /> At each probe, a reading of ambient air in the vicinity of the probe being tested was recorded <br /> before soil gas was monitored within the probe. Initially, the GEM was attached to the soil gas <br /> probe, the valve was opened, and the initial soil gas probe pressure was monitored and recorded. <br /> Then the GEM's internal pump was activated to extract soil gas from the probe. Readings for <br /> methane, oxygen, and carbon dioxide were monitored until the readings stabilized. The stabilized <br /> readings were recorded on the LFR technician's field sheet. After the readings were recorded, the <br /> internal pump was deactivated and the post reading soil gas probe pressure was monitored and <br /> recorded. The soil gas probe valve was then closed, and the GEM was disconnected. At the scale <br /> house, a reading of ambient air outside the scale house was recorded before monitoring was <br /> conducted within the building. <br /> 4080CavittStailmanRoad,Suite 100,Granite Bay,California 95746-9460 - (916)766-0320 - fax(916)786-0366 - www.lfr,com <br /> Offices Worldwide <br />