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La <br />s <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 />6.4 REFUSE <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 EHD officers will be notified. <br />The area shall be flagged and excluded from the work zone until the drum can be <br />better characterized. At no time shall workers attempt to remove or handle any <br />such item. If any suspicious odors or other materials are observed by workers, <br />the suspect debris and/or source shall be cordoned off and CIWMB and EHD <br />shall be contacted to conduct air monitoring or other identification as appropriate. <br />6.5 DRILLING SAFETY <br />Characterization of materials encountered during drilling will be performed by <br />inspection above original grade. Workers will not break the plane of an drilling <br />location with mouth or nostrils unless the safety of the excavation is first <br />monitored to verify that the environment meets OSHA requirements for oxygen <br />and combustible gas. Such monitoring will be with portable electronic test <br />equipment designed for that purpose with (Lantec GEM or equivalent). <br />Workers will not perform work that involves sources of combustion (such as <br />welding equipment) or any other work that generates temperatures that could <br />ignite methane, unless the safety of the area has been verified. <br />6.6 EQUIPEMENT <br />The driller will provide all necessary drilling equipment. All personnel working <br />around heavy equipment will be required to wear safety glasses and hard hats. <br />Work Plan — Soil Gas Monitoring Well Installation San Joaquin County <br />Corral Hollow Sanitary Landfill Public Works Department <br />Page 6 of 7 Solid Waste Division <br />