Map: Major exploration and drilling areas (in red)

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Some exploration and production (E&P) drilling wastes are disposed of in clay-lined, bermed, earthen pits at centralized and commercial drilling-fluid disposal sites (CCDD sites) in Texas, Louisiana, Oklahoma, and New Mexico.

This study is a census, compilation, and summary of information on active and inactive (including abandoned) sites in these four states. Information includes number and acreage of pits, waste volume, and levels of selected constituents in the waste and adjacent soil and groundwater.