MIL-HDBK-1005/16
reduce the potential for clogging. Chlorination of the
wastewater may be effective at minimizing microbiological
activity.
Acidization of the well is a process that involves
injecting a concentrated acid solution (typically hydrochloric
acid) down the well, shutting-in the well, allowing the acid to
react with the formation, then back-flushing the well or
continuing injection. Acidization is a very effective method of
restoring injection capacities in carbonate aquifer systems.
Another operational consideration is mechanical integrity (MI)
testing of the wells, which includes internal MI demonstrations
(to show no fluid movement is occurring due to leaks in the
casing) and external MI demonstrations (to show no annular fluid
movement is occurring around the casings installed). Most
injection wells require MI demonstrations every 5 years at a
minimum. See Ground Water Protection Council Class II Injection
Well Mechanical Integrity Testing Basic Training Course, Ground
Water Protection Council, 1994, for MI design criteria and
available technologies. The wells should be designed to allow
effective and economical well rehabilitation and testing
activities to be performed on a routine or permit-driven basis.
9.4
Aquifer Storage Recovery. Application or consideration
of this technology will require command or higher headquarters
approval. Aquifer storage recovery (ASR) stores water in a
suitable aquifer through a well during times when excess water is
available; the same water is later recovered through the same
well during times when it is needed. Most ASR applications in
operation today are for seasonal, long-term, or emergency storage
of potable (drinking) water. No ASR systems using treated
wastewater are known to exist; however many systems in Florida
are in various stages of development. Federal regulations for
reclaimed-water ASR systems are pending, although several state
programs, including Florida, are in the final stages of
development. In fact, Florida's reuse rules currently under
revision are encouraging and promoting reclaimed-water ASR
programs to provide seasonal storage of this increasingly
valuable commodity, allowing wastewater treatment plant operators
to more effectively manage their reclaimed water systems. Refer
to Groundwater Recharge and Wells, a Guide to Aquifer Storage
Recovery, David Pyne, 1994.
9.4.1
Applications Guidance. High-quality reclaimed water
may be stored seasonally in brackish aquifers for later recovery
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