The UIC regulations in 40 CFR 144.87(c) allow states to delineate "other sensitive ground water areas" by January 1, 2004, unless EPA grants a one year extension. How does EPA define "other sensitive ground water areas?"
The UIC regulations in 40 CFR 144.86(g) define "other sensitive ground water areas" as areas in the state in addition to ground water protection areas that are critical to protecting underground sources of drinking water from contamination. Other sensitive ground water areas may include, areas overlying sole-source aquifers; highly productive aquifers supplying private wells; continuous and highly productive aquifers at points distant from public water supply wells; areas where water supply aquifers are recharged; karst aquifers that discharge to surface reservoirs serving as public water supplies; vulnerable or sensitive hydrogeologic settings, such as glacial outwash deposits, eolian sands, and fractured volcanic rock; and areas of special concern selected based on a combination of factors, such as hydrogeologic sensitivity, depth to ground water, significance as a drinking water source, and prevailing land-use practices.
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