EGX_PROD_n6923390_191_Hollett_Road,_Noosaville_L53_SP163571

      J&P Richardson Industries Pty Ltd         -7-


3.3   Prudent Avoidance

      ENA recommends to members that they design, operate and maintain their networks
      prudently with regard to EMF exposure. Prudent avoidance has been defined in an
      Australian context by the former Chief Justice of the High Court of Australia, Sir Harry
      Gibbs as doing what can be done without undue inconvenience and at modest expense to
      avert the possible risk to health from exposure to new high voltage transmission facilities. In
      practical terms, this means designing new Transmission and Distribution facilities having
      regard to their capacity to produce EMF’s, and siting them having regard to the proximity of
      houses, schools, and the like.

      The ENA EMF handbook lists key guiding principles for applying prudent avoidance in
      relation to EMF, including the following :

            Measures to reduce exposure should be used if they can be implemented at ‘no
             cost’ or ‘very low cost’ and provided they do not unduly compromise other issues.

            There is no reliable scientific basis for the adoption of arbitrary low exposure limits
             or setbacks or for a specific exposure level at which precaution should apply.

            Prudent avoidance / precaution does not operate in isolation but rather is one of
             many issues that need to be given due consideration in the design and operation of
             the electricity supply system.


3.4   Electronic Devices

      Cathode ray tube (CRT) based computer monitors are susceptible to interference from low
      frequency magnetic fields. Immunity levels for CRT’s and other electronic devices are listed
      in AS/NZS 4251.1 “Electromagnetic compatibility – generic immunity standard”, and are
      summarized in Table 4 below.

      Table 4        LF magnetic field Immunity limits for electronic devices

          Device type          Residential / commercial environment
       CRT displays                            12.5mG
       Other equipment                         37.5mG




      Hollett Road EMF Study                                                           V1.0