Describe two features of a solid waste $($sanitary$)$ landfill.

Describe two hazardous waste onsite remediation technologies.

Explain the purpose of an electrostatic precipitator $($EP$)$ and show an equation used to determine its efficiency. Use this equation to determine the efficiency of an EP with a collector plate area of $5000$ sq$.$ m$.,$ gas flow rate of $200$ m$/$s and an effective drift velocity of $0\mathrm{.}1$ m$/$s$.$

Provide the equation used to compute SPL $($in dB$)$ from sound pressure in $$bars$.$ If a bulldozer emits a sound level of $90$ dBA, what is the sound level $($dBA$)$ of two bulldozers next to each other?