The modeled levels of EMF exposure and measurements on other existing HSTs are below the
IEEE Standard 95.6 MPE limits. Of 5 kV / M and 9 040 mG, for the public.
The design of the HST system is for the current flow to the train through the catenary. System and
return flow through the rails and static wires back to the Traction Power Stations. There is the
.Possibility for some current to enter the ground. This can cause corrosion from ground currents
along linear metal facilities. And nuisance shocks. This would be avoided by installing
supplemental grounding or insulating sections in continuous metallic. Objects in accordance with
standard HST designs.
. 5 CONCLUSIONA wide range of studies have been conducted concerning noise and or vibration effects on
animals namely dairy, cows. Mammals. In particular appear to react to noise at sound levels
higher than 90dB. Behavioral responses recorded, as startle range. From interruption to grazing
turning, head freezing (becoming, temporarily stationary), and locomotion from the sound source
up. To 20 meters, (Espmark.Et al. 1974)
Many studies on domestic animals suggest that some species appear to adjust to some forms of
sound, disturbance. Conclusions from research conducted to date provide only rough estimates of
threshold levels for observed animal, disturbance. Cows on dairies are constantly exposed to a
variety of noises from farm, machinery equipment farm, work and activities that. May have
.Habituated them to noises above the presumed threshold for response.
Most of the noise events used in prior studies is. Related to aircraft over-flights. General noise at
105 dB but not, at 80dB reduced milk, yield rate of milk release and,,, Feed intake by dairy cows.
Consequently any criteria, adopted for effects on animals by high-speed rail noise must be
.Considered interim until further specific research can be conducted. While current research
suggests minimal impact beyond. 100feet this is, not conclusive and consideration should be
given to studies of cattle responses to the HST for conditions. Where cattle operations are within
350 feet (90dB).
Studies examining responses in milk production from dairy cows on exposure. To EMF has been
.Variable and non-conclusive. Studies have examined variable and prolonged exposures to EMF.
Exposures to 10-kV / M and 30 - from T. EMF have resulted in minimal health risks to dairy animals as
well as milk production. The HSR estimated exposure at the. Right of Way is 6 - from T further
reinforcing the conclusion that there is minimal health risk to dairy animals.
.The California High-Speed Rail Authority (CHSRA) design and operations include program
elements to account for stray current. And EMF risks.
Further research is warranted in, all areas EMF and noise limits that are, related to the possible
effects. Of HST on dairy production.
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