Question

surface impoundments are pond - like areas that are used to hold liquid hazardous waste. to be in compliance with current environmental laws, which of these is required? rock formations with many pores rocky or gravelly soil on top sandy soil for fast drainage a liner made of plastic, rubber, or clay

Explanation:

To prevent hazardous waste leakage from surface impoundments and comply with environmental laws, a liner is needed to act as a barrier. Rock formations with pores, rocky - gravelly soil, or sandy soil would allow leakage. A liner made of plastic, rubber, or clay can prevent the waste from seeping into the ground.

Answer:

a liner made of plastic, rubber, or clay