JLW conducted analytical chemistry analyses, hydrogeology descriptions, geospatial analyses, statistical analyses, and performed quality checks and verification of all data collected; BEF, JMM, ZLH, DDC, and JLW analyzed data and provided conclusions for statistical analyses and geospatial relationships; TB and HR analyzed UOG drilling localities and common industrial practices; AFK, CPS, PH, TB, HR, CER and JLW provided comments, conclusions, and corrections on earlier versions of the manuscript; ZLH, BEF, DDC, JMM, PH and KAS wrote the paper.

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