2013-03-01_HYDROLOGY - P2010026 - Laserfiche WebLink

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proceeding to the shutdown process. The shutdown process entails immediately ceasing injection, to determine cause and remedlate the problem. All events that trigger the shutdown process will be • reported to the EPA within 24 hours. All events that sound an alarm due to a permit condition exceedance will be documented and reported in the quarterly report. Injection Well Monitoring Program Continuous monitoring will be carried out with instrumentation that will be capable of recording at least one value for each of the parameters (annulus pressure, injection and production densities, flowrates, volumes, pressures, and temperatures) at least every thirty (30) seconds. Recordings should be made at least once every ten (10) minutes. Monthly averaged, maximum, and minimum values for annulus pressure, injection and production densities, flowrates, volumes, pressures, and temperatures are required to be reported as part of the Quarterly Report to the Director. TUBING CASING ANNULUS MONITORING The annulus between the injection and production tubings and longstring casing will be continuously monitored to ensure that the pressure of the gas blanket does not exceed the MAIP. Additionally, abnormal changes-in pressure will be investigated to provide indication of problems with the casing or tubing Integrity. INJECTA. TEAND PRODUCTION FLUID SAMPLING The Permittee will be required to provide access for sampling the injected fluid, via a tap, isolated by shut -off valves. All sampling and measurement taken for monitoring must be representative of the monitored activity. Sodium bicarbonate equivalent assay will be derived from continuous gravimetric measurements of the injection fluid and produced fluid. Such equivalent assays from gravimetric measurements will be derived from periodic chemical analysis of the injection and recovery streams, and corrected for dissolved solids other than sodium bicarbonate. The information will be used to better understand leaching interval growth. A weekly bicarbonate assay will be performed on the injected_ barren_ liquor - as - well asthe fluid -to provide chemistry information on the injectate and produced fluid. The Permittee must also analyze, quarterly, a sample of the injectate for the pH, TDS, specific gravity, and specific. conductivity. This analysis will be reported to EPA as part of the Quarterly Report to the Director. • WELLHEAD MONITORING • The Permittee will be required to install and maintain wellhead equipment. Required wellhead equipment includes but Is not limited to; 1) continuous recording devices for injection pressure, produced fluid and injectate temperatures, production and injection flow rates, and annular pressure, 2) shut -off valves located at the wellhead on the injection; 3) flow meters that measure the cumulative volumes of injected and produced fluids; 4) fittings, thermocouples, or transducers attached to the production tubing and the annulus between the longstring casing and tubings. TEMPERATURE AND PRESSURE • The injectate temperature will be continuously monitored to ensure that the operating temperature does not exceed the permit limit of 400 deg F and does not adversely affect the formations containing USDWs. Fluid temperature in the formation will be provided by two dual thermocouples on the production tubing string, and will provide four discrete temperature readings between the • depths of approximately 2,148 feet to 2,260 feet, corresponding to the main leaching targets. For the Permit CO32210 -00000 14 `';' 'M:'r Statement of Basis