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"There's a mean-sounding hiss emanating from one of a dozen pipes rising like stovepipe to feed into a desert-tan battery that intermittently flushes high volumes of fluids 4,500 feet below ground. Larry Pickerel, the robust production foreman for Legato Resources, explains how valves on the water-alternating-gas wellhead skid \u2014 as the installation is known \u2014 are wrenched open or shut to flood nearby oil wells with either water or carbon dioxide."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.sacurrent.com/sanantonio/cleaning-up-coal-in-west-texas-expected-to-help-fuel-sa-and-wring-out-the-oil-patch/Content?oid=2243757>