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(a) Injection pressure: a continuous pressure monitoring device in the 2-3/8 <br />tubing at the wellhead connected to an instrument with a sampling <br />frequency of at least every 15 seconds and aone-half (1/2) inch Female Iron <br />Pipe (F1P) fitting, isolated by plug or globe valves and located on the tubing <br />to allow attachment of one-half (1/2) inch Male Iron Pipe (1VIIP) pressure <br />gauges or the attachments for equivalent "quick-disconnect" pressure gauges <br />certified for ninety-five (95) percent accuracy, or better, throughout the <br />range of permitted operation in order to verify values for injection pressure <br />being recorded from the continuous monitoring device. <br />(b) Wellhead pressure of the tubing/casing annular space: a continuous <br />pressure monitoring device in the wellhead casing/tubing annulus that is <br />connected to a device with a sampling frequency of at least every 15 <br />seconds and aone-half (1/2) inch Female Iron Pipe (FIP) fittings, isolated <br />by plug or globe valves, and located on the tubing/casing annulus; and the <br />above fittings will be positioned to allow attachment of one-half (1/2) inch <br />Male Iron Pipe (MIP) pressure gauges or the attachments for equivalent <br />"quick-disconnect" pressure gauges certified for ninety-five (95) percent <br />accuracy, or better, throughout the range of permitted operation in order to <br />monitor the annulus fluid pressures. <br />The tubing/casing annulus must be maintained full of either fresh water <br />treated with anon-toxic corrosion inhibitor or other packer fluid as <br />approved, in writing, by the Director. This fluid must be maintained under <br />a positive pressure using a nitrogen gas blanket. A diesel freeze blanket or <br />other fluid as approved, in writing, by the Director may be circulated from <br />surface to below frost level at completion to prevent freezing and possible <br />equipment failure during winter months. <br />(c) Because the well will be operating under reasonably high pressures, the <br />continuous monitoring system must have an automatic well shut down <br />switch installed based on the following Parameters: <br />(i) The surface injection (tubing) pressure shall be maintained between <br />200 to 930 psi. Any operation outside of this range shall result in an <br />immediate shut down of the injection pumps; <br />(ii) Because the gas pressure will vary as a result of fluctuation in the <br />injectate temperature, the tubing/casing annulus pressure will not <br />stay at a fixed value. The Pemut establishes and operating range to <br />allow for natural fluctuation. The pressure must be maintained <br />between 20 and 80 psi. Any operation outside of this range shall <br />result in an immediate shut down of the injection pumps. When <br />Statement of Basis for EPA Permit No. CO 10932-04664 Page 7 of 18 <br />