http://webapps.rrc.state.tx.us/DP/drillDownQueryAction.do?fromPublicQuery=Y&name=MERCURY%2B1H&univDocNo=490373832
http://webapps.rrc.state.tx.us/DP/drillDownQueryAction.do?fromPublicQuery=Y&name=MERCURY%2B2H&univDocNo=490378886