5348

aValues shown are HHV. In HHV measurements, the energy required to drive off the moisture formed during combustion is not deducted.

bValues assumed for the purpose of estimating overall values.

aValues shown are HHV. In HHV measurements, the energy required to drive off the moisture formed during combustion is not deducted.

bValues assumed for the purpose of estimating overall values.

toxic material in solid waste is in one of three categories:

• Toxic organic compounds, many of which are also flammable

The results of studies of toxic metals in solid waste vary. Table 10.3.6 summarizes selected results of two comprehensive studies performed in Cape May County, New Jersey (Camp Dresser & McKee Inc. 1991a) and Burnaby, British Columbia (Chandler & Associates, Ltd. 1993; Rigo, Chandler, and Sawell 1993). Reports of both studies contain data for additional metals and materials, and the Burnaby reports contain results for numerous subcat-egories of the categories in the table. The Burnaby reports also analyze the behavior of specific metals from waste components during processing in an MSW incinerator.

Franklin Associates, Ltd. (1989) provided extensive information on sources of lead and cadmium in MSW, and Rugg and Hanna (1992) compiled detailed information on sources of lead in MSW in the United States.

Most MSW referred to as household hazardous waste is so classified because it contains toxic organic compounds. Large quantities of toxic organic materials from commercial and industrial sources were once disposed in MSW landfills in the United States, and many of these landfills are now officially designated as hazardous waste sites. The large-scale disposal of toxic organics in MSW landfills has been largely eliminated, but disposal of household hazardous waste remains a concern for many. Generally, household hazardous waste refers to whatever toxic materials remain in MSW, regardless of the source.

Estimates of the abundance of household hazardous waste vary. Reasons for the lack of consistency from one

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