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Califfia Integrated Waste Mana ernt Board <br /> g g <br /> Dan Eaton, Chairman <br /> ■rrrr■ <br /> rrrr• 8800 Cal Center Drive Sacramento California 95826 • (916)255-2200 <br /> www.ciwmb.ca.goV. <br /> C1d nfl, 23 pm Gray Davis <br /> Winston H.Hickox !_`1 12 0o Governor <br /> Secretary for <br /> Environmental <br /> Protection <br /> March 20, 2000 <br /> Robert McClellon, REHS <br /> LEA Program Manager <br /> Public Health Services <br /> P.O. Box 388 <br /> Stockton, CA 95202--0388 <br /> SUBJECT: GAS MONITORING AT HARNEY LANE SANITARY LANDFILL <br /> SWIS#39-AA-0003 <br /> Dear Mr. McClellon: <br /> I would like to thank you for your time in assisting me in conducting a site visit at the Harney <br /> Lane Sanitary Landfill. The purpose of our site visit was to perform gas monitoring from all <br /> of the gas monitoring probes so that we can adequately assess the landfill gas situation, <br /> however due to time constraints, I was not able to complete the gas sampling and monitor all <br /> of the probes as I had originally planned. <br /> As you noticed during our gas sampling from the four gas monitoring probes, GW 1 through <br /> GW4, landfill gas was detected at methane concentrations ranging from 0.1% in the GW1 <br /> Intermediate probe to 3.5% in the GW3 Deep probe,by volume. At these concentrations, <br /> methane gas does not pose an explosive hazard as it is below the Lower Explosive Limit, <br /> however, it should be closely monitored, specially in light of the fact that these probes are <br /> located immediately adjacent to the migrant farm labor camp. <br /> During our site visit, I noted landfill gas odor in the flare station house from one of the <br /> blowers, however the odor was not as strong as it was detected during our last visit. I also like <br /> to point out that the site continues to suffer from drainage and erosion problems as well as <br /> settlement as was noted during our last site visit and pointed out in our letter of January 18th, <br /> 2000. <br /> Please have the operator provide this office with the most recent four quarterly gas sampling <br /> results from this site. Furthermore, since the probes at this site have shown detectable <br /> concentration of methane gas, we would like to set up a time to sample all of the gas <br /> monitoring probes at this site. <br /> California Environmental Protection Agency <br /> ;.7'rinted on Recycled Paper <br />