Simultaneous Testing – 422.130.(c)

  1. Simultaneous testing shall be comprised of a minimum of 2 indoor radon measurements conducted simultaneously with similar measurement devices (see Appendix C).
  2. Simultaneous tests shall be:
    • Co-located and spaced 4 to 5 inches apart;
    • Exposed for the same measurement period; and
    • Produce results in the same units (pCi/L or WL).
  3. The results of both measurements and the average of the simultaneous measurements shall be reported and shall be considered appropriate as the basis for determining the need for mitigation.

32 ILAC 422.130(c)