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1 • ' • • <br />- 1', <br />6.3 Present Areas of Responsibility <br />No formal agreement exists between the MOE and MNR, however, some <br />working relationships have developed. Available data suggest that the <br />limited number of disposal wells in the region has limited the interac- <br />tion between the two agencies. However, it is possible that an increas- <br />ing number of applications for injection well permits will be received, <br />and it many become desirable to formalize the working relationship <br />between the ministries. The diagram shown in Figure 19 shows the gen- <br />eral participation of each agency in the permitting process for the sev- <br />eral different types of injection well permits. The types of wells that <br />are covered by dual regulations are: <br />1. Industrial waste disposal wells, <br />2. Oisposal wells for brines produced with oil and gas, <br />3. Disposal wells for brines resulting from creation of storage <br />caverns in salt, ("ballast" brines used for displacement of <br />product from caverns i5 considered to be industrial waste), <br />4. Wells used for pressure maintenance of petroleum reservoirs. <br />(Secondary recovery wells). No "waste" disposal is involved. <br />The following types of wells are regulated exclusively by MNR: Oil <br />and gas wells, solution-mining wells, and storage cavern wells. <br />Water wells are regulated exclusively by MDE. <br />In the case of industrial waste disposal wells (Figure 19), the MNR <br />is generally responsible for permitting the well to be drilled, while <br />MDE is responsible for reviewing geologic data, engineering plans for <br />surface facilities and operational controls before issuing a Certificate <br />of Approval to use the well as a disposal facility. Note that disposal <br />of industrial wastes to the Detroit River Group is prohibited. The <br />117 <br />