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Mr. Robert McC1ellon <br />September 22, 2004 <br />Page 8 of ll <br />POTENTIAL CHEMICAL I-IAZARDS <br />Heavy Metals <br />Burn ash sample analysis obtained from previous waste characterization investigations from <br />other sites indicate that non-hazardous household or municipal waste contains various heavy <br />metals.Test results indicate the predominant metals of concern in burn ash are not readily <br />soluble in water, dierefore, not readily leachable into ground water.However, burn ash can pose <br />a risk if it becomes airborne and is inhaled, ingested, or in direct contact with the skin.Site <br />workers will utilize dust control measwres to minimize airborne dust. <br />Landfill Gas Constituents <br />Landfill gas is generated as a result of the waste breakdown at a landfill. Methane is the major <br />component of gas generated during biodegradation of solid waste buried in landfills.It is an <br />odorless and colorless gas.It does not chemically react with the body, but may cause <br />asphyxiation by displacing the oxygen in the air.Methane monitodng conducted by CIWMB <br />staff and their consultants did not detect appreciable methane gas. Staff workers will continue to <br />use appropriate precautions when excavating and trenching landfill areas, however. <br />Unidentiiied Drums <br />Unidentified drums may be present on-site.If dmms are uncovered during an excavation, the* <br />area shall be cordoned oH` and the CIWMB and EHD officer will be notified.The area shadl be <br />flagged and excluded from the work zone until the drum can be better characterized.At no time <br />shall any site personnel attempt to remove/handle any such item. <br />If any suspicious odors or other materials are identified by site workers, the suspect debris and/or <br />source will be cordoned off and Ground Zero will be contacted to conduct air monitoring or other <br />identification as appropriate. <br />PHYSICAL HAZARDS <br />There are numerous potential physical hazards associated with this project which,if not <br />identified and addressed, could present operational problems as well as accidents and personal <br />injury to the work force.In order to minimize physical hazards, standard safety protocols have <br />been developed and will be followed at all times.Mr. Palomino will observe the general work <br />practices of all personnel and enforce safe procedures to minimize physical hazards. <br />Trippinsz. Slippinsz. and Falling Hazards <br />Site persormel will be reminded daily to maintain sure footing on all surfaces.In order to <br />minimize tripping hamrds caused by debris, job supplies, and equipment, matedal will be <br />removed daily 'fiom the work areas and stockpiled in their respective storage areas, if feasible. <br />G:\GROUNDZE\Palomino\wp_sitcmitfina|.doc <br />Iflfb fn <br />w"'vf~>& <br />zf¢==~»~#