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Module 8 — Protecting Your Well From Contamination
Figure 2 Multi-Aquifer Well Completion
Figure 1 Annular or Casing Seal
Old Wells
Old unused wells that are poorly constructed or have corroded steel casing can lead to
contamination of an aquifer. Nearby wells, completed in that aquifer, may eventually
become contaminated.
Prevention:
Old unused wells must be properly plugged. See Module 9 "Plugging
Abandoned Wells."