Laserfiche WebLink
Injection Volume Limitation <br />Cumulative injected fluid volume limits are set to assure that injected fluids remain within the <br />boundary of the exempted area. Cumulative injected fluid volume Is limited when injection occurs <br />into an aquifer that has been exempted from protection as a USDW. <br />Presently, there are.no aquifer exemptions associated with this permit and no fluid volume limits. <br />Furthermore, in this process, as fluids are injected into the subsurface, the fluids are recirculated and <br />brought back up to the surface within the same well. <br />Mechanical integrity (40 CFR §146.8) <br />An injection well has mechanical integrity if:, <br />1. there is no significant leak in the casing or tubings (Part i); and <br />2. there is no significant fluid movement into a USDW through vertical channels adjacent to <br />the injection well bore (Part II). <br />The, Permit prohibits Injection into a well which lacks mechanical integrity. The Permit requires that <br />the well demonstrate mechanical integrity prior to injection and periodically thereafter. A <br />demonstration of mechanical integrity includes both internal (Part I) and external (PartII). The <br />methods and frequency for demonstrating Part I and Part iI mechanical integrity are dependent upon <br />well - specific conditions as explained below. <br />Internal Mechanical Integrity (Part i MI) will be demonstrated prior to beginning injection. A <br />successful Part I Mechanical Integrity Test (MIT) is required prior to receiving authorization to inject <br />and repeated no less than five years after the last successful MIT. A demonstration of Part I MI is <br />also required prior to resuming Injection following any workover operation that affects the casing. <br />Part I MI is demonstrated by using the maximum permitted injection pressure or 1,000 psi, whichever <br />is less, with'a ten percent or less pressure loss over thirty minutes. The pressure test requires <br />removing both tubings and setting a temporary packer or retrievable bridge plug at the base of the <br />longstring casing. <br />External Mechanical Integrity (Part II MI) will be demonstratecfby conducting a Temperature - Survey. -- <br />Kbaseline Temperature Survey will be conducted prior to authorization to inject. The first <br />demonstration following the baseline Temperature Survey will be•made within the two years after <br />injection has commenced. Subsequent demonstrations are required no less than five years after the <br />last successful MIT. <br />PART VI. Monitoring, Recordkeeping and Reporting Requirements <br />The goals of the proposed monitoring programs are to ensure that the well Integrity is not <br />compromised as a result of RDD activities. Temperatures and pressures will be closely monitored to <br />ensure certain established limits are not exceeded, and to monitor the water quality in the USDWs. <br />The monitoring program is described below and the requirements are summarized in APPENDIX D <br />of the Permit. <br />Once an alarm sounds or upon discovery that there is an exceedance in the permit condition, the <br />response and shutdown process will be followed. <br />Response and Shutdown Process <br />The response and shutdown process entails investigating the origin to determine that the permit <br />exceedance and /or alarm sounded as a result of a valid concern and not a false alarm before <br />Permit CO32210 -00000 13 Statement of Basis <br />