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LFG may also contain trace concentrations of organic compounds. Dilution of <br />LFG in air to below the OSHA safety limits of 0.5 percent methane (10 percent of <br />the Lower Explosive Limit) usually reduces the concentration of trace <br />components to below detection limits. <br />LFG can move through soils, especially through sandy layers that exist at the <br />site. Movement through soils can remove the odorous compounds of LFG, such <br />that the LFG can be detected only with the proper test equipment. <br />Refuse will not be excavated in this investigation. The following is provided for <br />completeness. <br />The landfill contains household refuse, demolition debris, tree trimmings, and <br />miscellaneous refuse. To the best knowledge of the County, hazardous <br />materials have not been disposed at the site. However, some items that are <br />currently defined as hazardous waste (paint, insecticides, etc.) may have been <br />included in household waste disposed at the site. <br />Potential hazards associated with the direct contact with refuse include: <br />1. Biological infection <br />2. Household hazardous waste <br />Unidentified drums may be present in the refuse. If drums are uncovered during <br />pot -holing and excavation, the area shall be cordoned off and the California <br />Integrated Waste Management Board (CIWMB) and San Joaquin County <br />Environmental Health Department (EHD) officers will be notified. The area shall <br />be flagged and excluded from the work zone until the drum can be better <br />characterized. At no time shall workers attempt to remove or handle any such <br />item. If any suspicious odors or other materials are observed by workers, the <br />suspect debris and/or source shall be cordoned off and CIWMB and EHD shall <br />be contacted to conduct air monitoring or other identification as appropriate. <br />CAL/OSHA safety rules and regulations will be followed fully and completely <br />during this project. Personnel working near the construction area will be required <br />to wear hard hats, safety glasses and safety vests. All personnel will be advised <br />to avoid contact with refuse. <br />Health & Safety Plan San Joaquin County <br />Corral Hollow Sanitary Landfill Public Works Department <br />Page 3 of 5 Solid Waste Division <br />