| http://www.w3.org/ns/prov#value | - And it specifically exempts hydraulic fracturing fluids from the definition: ???This term does not mean ??? (b) water, gas, or other material which is injected into a well to facilitate production of oil or gas, or water derived in association with oil or gas production and disposed of in a well, if the well used either to facilitate production or for disposal purposes is approved by the authority
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