Betreff:
Auditor General
Petition |
Von: Martin Weatherall |
Datum:
Fri, 15 Jun 2007
16:55:40 -0400 |
|
Mr. Gerry Higgins has been fighting against overexposure to electro
magnetic radiation for six years, even the tragic loss of his wife has not
stopped him.
He has been raising awareness in Newfoundland, about
the dangers of transformers and powerlines, at every opportunity. He has
been very successful and Newfoundland Municipalities have called on the
Provincial Government and the Federal Government for an inquiry into the
situation.
Gerry has just submitted a environmental petition to
the Auditor General. It is attached to this message, along with some
research documents about the dangers caused by electro magnetic radiation. Please
read 'Gerry Higgins petition to the Auditor General'.
http://www.buergerwelle.de/pdf/emf_links_to_cancer_court_testimony_conneticut.pdf
http://www.buergerwelle.de/pdf/power_line_emf_exposure.pdf
http://www.buergerwelle.de/pdf/werrington_survey_jan_06_rentham_u.k.pdf
Martin Weatherall
WEEP (Wireless Electrical and Electromagnetic
Pollution).
----- Original Message -----
From:
Gerry Higgins
To: weather
Sent: Friday,
June 15, 2007 3:13 PM
Subject: Fw: Auditor
General
>Box 157
>Norris Arm
>Newfoundland
>A0G 3M0
>15 June 2007
>
>Dear Ms Smith
>
>I have attached my environmental petition to the Auditor General.
>
>I have already sent a signed hard copy to the Auditor General by registered
>mail.
>
>In this message I have attached several documents which support the
>concerns that I have mentioned in my petition.
>
>Please note, that the dangers from electro magnetic fields, that are
>mentioned in the attached documents about electrical powerlines, are also
>the same as those from electrical transformers.
>
>If you need to contact me, I can be reached at Tel # 709 653 2152.
>
>Yours sincerely
>
>Gerry Higgins
* Power stands charged- Disturbing story about transformers and cancers
(12/03/03)
* Power stands charged- Disturbing story about transformers and
cancers (12/03/03)
Power stands charged
(Please remember Sir Richard Doll's viewpoint below - And
stay
tuned for more to follow on similar views by Doll on other
environmental problems.)
Are electromagnetic fields causing women to miscarry,
triggering childhood leukaemias, and even driving some
people
to suicide? As new studies emerge, the experts are divided
YOU CAN'T SEE, smell, hear or feel them, but they surround
you
at work and at home. And, according to some scientists,
the
electromagnetic fields given off by electrical appliances,
house wiring, computers or overhead power lines are far
from
innocuous - they constitute an invisible menace eating
away at
our health and are responsible for such diverse ills as
childhood leukaemias, brain cancers, miscarriage,
depression
and even suicide.
Last year, the National Radiological Protection Board
(NRPB),
the government-funded organisation which sets safety
limits on
exposure, concluded that high electromagnetic fields
(EMFs)
might double the risk of childhood leukaemia, and was
probably
responsible for an additional two deaths from the disease
each
year. Now a massive report from researchers in the United
States has cast the net of doubt much wider. The report,
conducted by three senior figures at the California
Department
of Health Services, concluded that the authors "are
inclined
to believe that EMFs can cause some degree of increased
risk
of childhood leukaemia, adult brain cancer, Lou Gehrig's
disease (a degenerative neurological condition similar to
motor neurone disease) and miscarriage".
The link to miscarriage was especially dramatic - as many
as
one in 20 pregnancies may end prematurely due to EMF
exposure,
the report said. Whether by coincidence or serendipity,
the
NRPB, which is independent of the power industry, will
shortly
issue a discussion document on whether action is needed.
The miscarriage link is controversial - both the NRPB and
the
Electricity Association, which speaks for power companies,
say
the studies on this were flawed.
But Denis Henshaw, a professor of physics at Bristol
University, who argues that power lines can make people
sick,
says that the new findings on miscarriage turn this into a
major public health issue.
"We're talking about an absolute extra risk of miscarriage
of
5 to 10 per cent, which is considerable," Henshaw says.
"The
power industry has always argued that even if there was an
increased risk of childhood leukaemias, they are still
very
rare, and so it wasn't a public health matter. This is a
much
bigger can of worms." Henshaw believes that EMFs are
responsible for skin cancers, lung cancers, depression and
around 60 suicides a year.
The authors of the American report, which took ten years
to
complete, cost $7 million (£4.4 million) and runs to 400
pages, couldn't rule out links with suicide or adult
leukaemia. All three scientists were "close to the
dividing
line between believing and not believing" that EMFs put a
person at increased risk of these. They did not believe
that
EMFs were implicated in birth defects, other cancers,
heart
disease, Alzheimer's disease or depression. The report did
not
look at the EMFs from mobile phone masts.
Henshaw has hailed the report, the final draft of which
was
released on the internet without announcement last summer,
as
"groundbreaking". He says: "(The report) is unprecedented
in
its depth. The power industry has tried to ignore it, but
it's
so substantive that people can't really complain about it.
Importantly, it's also been independent from industry
pressure. It should wake people up."
Henshaw argues that the NRPB should follow the examples of
Switzerland and Sweden in reducing the maximum safe
exposure
levels. The doubling of childhood leukaemias was seen at
levels of 0.4 millionths of a Tesla (0.4 microTesla). The
safe
limit is set at 4,000 times that, at 1600 microTesla.
Four years ago, Switzerland dropped the maximum to just 1
microTesla. To drop the limits any less dramatically,
Henshaw
comments, "would be as irrelevant as reducing the speed
limit
on the motorway from 1,000mph to 500mph". He also believes
that houses should no longer be built near power lines or
substations, and that cables should be buried underground.
Dr Michael Clark, scientific spokesman for the NRPB, says
the
Californian report "can't be dismissed but, because it is
a
review of existing work rather than new research, it
doesn't
substantially change anything". He cautions against being
too
prescriptive about exposure levels because the
conveniences of
modern life might be as much to blame as pylons and power
lines. "Hairdryers produce large fields, as do car
engines,
but can we really tell people not to drive their cars?"
While someone standing directly beneath a power line might
experience a magnetic field of 40 microTesla, a hairdryer
or
electric razor can produce 1000 microTesla. However, Dr
John
Swanson, scientific adviser on EMFs to the Electricity
Association, says that these high exposures come in short
bursts, and holding a hairdryer even a few inches away
from
the head cuts the level to about 100 microTesla.
Clark says that because many factors probably contribute
to
miscarriage, it is vital to be sure that the role played
by
EMFs is genuine.
The NRPB has appointed Sir Richard Doll, the
epidemiologist
who famously spotted the association between smoking and
lung
cancer, to review all the evidence, including that on
miscarriage. Under his guidance, the NRPB believes that
there
is "(no) substantial evidence of increased risk of
miscarriage
attributable to exposure to above-average magnetic fields"
and
therefore no regulatory action is called for.
Doll's scepticism is shared by Swanson, who says: "The
miscarriage studies are sufficiently flawed for me to be
wary.
For example, the participation rate was only about 39 per
cent
of the women approached, and most epidemiologists would
look
for a rate of at least 50 per cent. The questions raised
are
valid but these studies don't answer them.
"I think the California report is wrong. Their conclusions
are
out of line with most other reputable research groups
around
the world."
What is really needed to resolve the issue is harder
statistical evidence, or a killer fact - a convincing,
provable scientific theory of how EMFs can physically
damage
the body. Such a theory would not only settle the
uncertainty,
but would also pave the way for legal action. Lawyers such
as
Martyn Day, whose London firm Leigh & Day is in touch with
potential litigants, say that the California report is an
important new weapon in the battle. "It's a significant
new
piece of evidence which has pushed me back to the edge,"
he
says.
"But I could see the courts being very nervous about this
one.
There is evidence that EMFs affect molecules, but not
enough
to break them apart. And it is always possible that it is
something else, rather than the EMF, that's causing the
damage." And so, in the midst of blurred, ambiguous
statistics, the controversy lingers. People living in the
shadow of power stations continue to pile up anecdotal
evidence of ill-health, miscarriage and suicide. And, in
the
absence of hard figures, scientists remain reluctant to
believe that the power lines that lattice the landscape
could
damage unborn babies and make people take their own lives.
http://www.timesonline.co.uk/article/0,,589-597038,00.html
Informant: Don Maisch
Disturbing story about transformers and cancers
A few days ago I received a phone call from Mr. Gerald
Higgins
from Newfoundland. He told me a disturbing story about
transformers and cancers and when I suggested that he send
his
story to some of the EMF newsgroups for circulation he
asked
if I would send it on his behalf because he's "new to
email
and is a slow typist".
I agreed. What follows is a much-abbreviated version of
Gerald
Higgins' saga.
Gerald Higgins bought a small house measuring 12 feet by
26
feet and skidded it to it's new home on a half acre parcel
of
land in Norris Arm, NL, Canada. He placed his home
directly
beneath a power line, moved into it in October 1980, and
Light
and Power duly hooked it up for him. The 13.8 kV power
line
was about 15 feet above his roof. He didn't know that this
was
not a good place for a power line and Light and Power
didn't
comment about it either.
In the mid to late 1990s the weather began to change as
sleet
storms became more common. Gerald Higgins was concerned
that
the power line might fall directly on his house after one
of
these storms so in 1998 be asked the power company to move
the
line, but they refused.
In May 2000, Gerald Higgins' wife, Margaret, was diagnosed
with breast cancer. She was 39 years old and had no
history of
breast cancer in the family. She had months of
chemotherapy in
Grand Falls and radiation therapy in St. John's during
which
time Mr. and Mrs. Higgins stayed at Agnes Cowan Hostel.
During
the therapy sessions, Gerald Higgins spoke to well over a
4000
people and found that all but 9 of them lived within 100
feet
of a transformer.
He talked to 7 married couples where both partners had
bowel
cancer.
He learned about a leukemia patient who was diagnosed when
he
was 18 years old and died at the age of 25. Two
transformers
were within 50 feet of his house. His father was later
diagnosed with prostate cancer at the age of 52.
In Cornerbrook, a couple in their early 50s lived within
33
feet of a transformer. The husband had thyroid cancer and
the
wife had breast cancer. They were both blind.
Then there are horror stories of transformers crashing to
the
ground and dumping their chemical waste. In one such
example
in St. Stephens, a transformer fell in the fall of 1998
and
splashed a nearby home and yard with its chemical waste.
The
husband was diagnosed with brain tumor in April 1999 and
he
died in August of that year. In June 2000, the wife was
operated on for colon cancer. The brother-in-law who lived
50
feet away died of lung cancer two months later and the
nephew
who lived across the street and within 50 feet of a
transformer developed stomach cancer and has since died.
Light
and Power dumped gravel in the yard and said there was no
danger with the spill.
Gerald Higgins has hundreds of similar stories.
After his wife developed breast cancer, Gerald Higgins put
more pressure on Newfoundland Power and they moved the
line 20
feet away and placed it on higher poles during the winter
of
2002. The magnetic field on the roof immediately above the
bedroom now reads 5.7 mG, so we can image how high it was
when
the line was directly overhead.
Gerald. Higgins has become a man with a mission. He wants
the
government to fund a properly conducted, independent
survey to
assess the link between cancer and proximity to
transformers.
If people living near transformers have a higher risk of
developing cancer then he wants the transformers moved.
Support for Gerald Higgins is mounting. After he appeared
on a
talk show and was quoted in the local newspaper, The
Herald,
mayors and city clerks from around the island began to
write
to him with their own mini surveys. Here are a few of
them.
Brent's Cove has a population of 283. Nine transformers
can be
found within 100 feet of houses. In one family, consisting
of
15 family members who lived 54 feet from a transformer,
only 4
are living. The rest had died of cancer within the past 10
years. Another person who lived 105 feet from the same
transformer was diagnosed with cancer and has since died.
In Carmanville, the Justice of the Peace conducted a
survey on
October 6, 2002. He found people with cancer in 19 homes.
Sixty percent (60%) of these homes were within 30 feet of
a
transformer and the rest were within 100 to 150 feet.
In East Port, of the 51 cancer patients identified, 49
lived
within 100 feet of a transformer and some lived "very
close"
to transformers according to one of the Councilors who
conducted the survey.
The Mayor of Fleur de Lys said that during the past 10
years
all cancer cases lived within 100 feet of a transformer.
In
five homes across the road from a fish plant with a large
power source, 4 people developed cancer.
In Flowers Cove, of the 25 transformers near homes, 18
transformers were near homes where people had developed
cancer.
In Hermitage, the Town Clerk conducted an independent
survey
and found that many of the cancer patients who died had
transformers in their yards.
In Gaskiers and Point La Haye the Town Manager reported
that
21 out of 23 people diagnosed with cancer lived near
transformers on utility poles. So far 14 have died.
In Engelee, the City Clerk reported that out of 8 or 10
people
with cancer most lived within 100 feet of a transformer.
All
but 2 have died.
Joe Batt's Arm has 40 transformers within the community
and 33
are in close proximity to homes where people have died of
cancer according to the Mayor.
The Mayor of La Scie reported that of 52 cancer cases 46
lived
within 100 feet of a transformer.
There are 12 transformers and a population of 176 people
within the community of Plate Cove. Of the 25 people
diagnosed
with cancer in this community, most live "close" to a
transformer according the Mayor.
In Pools Cove, the Mayor reported that transformers were
within 50 to 125 feet from homes where people had been
diagnosed with cancer. In this small community during the
past
20 to 25 years, 18 people have been diagnosed with cancer
and
12 of them have died.
In Port Rexton, the Town Manager reported that within the
past
10 years or so, of the 21 cancer-related deaths, 15 lived
within 100 feet of pole-mounted transformers. Three cancer
survivors still live within 100 feet of a transformer.
In Port Saunders, 19 of the 20 people diagnosed with
cancer
during the past 10 years lived within 50-100 feet of a
transformer.
In Port Union, the Mayor reported 12 cancer cases within
the
past 10 years. All 12 lived within 200 feet of a
transformer
and 9 lived within 100 feet. Nine of these people have
since
died.
In Seal Cove West, the Mayor drove around to survey the 28
transformers and cancer cases. A total of 18 people
developed
cancer of which 11 have died and all lived within "close
proximity" to a transformer.
The Mayor of St. Alban's reported that of the 38 people
with
cancer that he phoned 47% lived within 50 feet, 32% within
50-100 feet, 13% within 100-150 feet, and 8% lived beyond
150
feet of transformers.
In St. Lunaire-Griquet, the Mayor reported that of the 14
people with cancer, 11 lived within 30 to 50 feet of a
transformer.
In St. Mary's, the Mayor was diagnosed with cancer and
died
recently. She lived "2 arm lengths" or about 12 feet from
2
transformers.
In Trespassey, a 33 year old, non-smoking woman who
developed
a tumor on her leg had a transformer in her yard.
Woodstock has a population of 300 people and a total of 16
transformers within the community, according to the Deputy
Mayor. Within the past 10 years 8 people have died of
cancer
and 11 are living with cancer. All live within 50 to 100
feet
of a transformer. There is also a transformer within 50
feet
of the school that has a kindergarten.
In Norris Arms, 300 residents, almost 50% of the
population,
signed a petition to ask the Minister of Health to fund an
independent study to determine the relationship between
cancer
incidence and transformers. They ask that the study be
coordinated by the Public Health Department and that it be
conducted at arm's length from NFL Power.
This request seems perfectly reasonable to me considering
that
scientific studies report a two-fold increased risk of
childhood leukemia for children who live near power lines
and
are exposed to magnetic fields above 2 mG. Other research
shows that electromagnetic fields may promote the growth
of
cancerous cells. These scientific studies in combination
with
the informal survey conducted by Gerald Higgins and the
Mayors, Clerks and Councilors across Newfoundland are
trumpeting a loud wake-up call to our public health
officials.
I trust they are listening.
Mr. Higgins is determined not to let this issue die. If
you
would like to contact Gerald he can be reached via email
at
GerryHiggins55@hotmail.com or by phone at 709 653-2152.
Message from Magda Havas
Citizens' Initiative Omega
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May 30, 2007 |
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Magnetic fields tied
to railway workers' cancer |
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By Amy Norton NEW YORK (Reuters Health) - Railway workers exposed to low-frequency
magnetic fields may have an elevated risk of certain blood cancers, new study
findings suggest. In a study of more than 20,000 Swiss railway workers who were followed
for 30 years, researchers found that certain workers' risk of myeloid
leukemia and Hodgkin's lymphoma climbed in tandem with their exposure to very
low-frequency magnetic fields. Train drivers, who had the greatest exposure, were nearly five times
more likely to develop myeloid leukemia than station managers, the workers
with the lowest exposure to magnetic fields. Drivers were also more than three times as likely to be diagnosed with
Hodgkin's disease, a cancer of the lymph system. The findings appear in the journal Occupational and Environmental
Medicine. Electric and magnetic fields (EMFs) are areas of energy surrounding
electrical devices, including appliances, computers, electrical wiring and
power lines. They also occur naturally in the environment. Numerous studies have investigated whether human-made EMFs promote
cancer. Overall, there is little evidence that everyday exposure to EMFs --
from power lines or electric blankets, for instance -- raise the risk of
cancer in adults. Studies have been less clear about whether on-the-job
exposure creates a cancer risk. For the current study, researchers led by Dr. Martin Roosli of the
University of Berne looked at the relationship between railway workers'
cancer rates and their long-term exposure to extremely low-frequency magnetic
fields. Drivers had the greatest exposure to low-frequency magnetic fields,
from spending long hours in train engine cabs. They had from 3- to 20-times
the exposure of yard engineers, train attendants and station managers. As mentioned, drivers also had the highest risks of myeloid leukemia
and Hodgkin's disease, Roosli and his colleagues found. There was no link,
however, between magnetic field exposure and other forms of leukemia or
lymphoma, or brain cancer. The reasons for the connection between magnetic field exposure and
certain cancers aren't clear, Roosli told Reuters Health. As a precautionary
measure, he and his colleagues say, new railway equipment should be designed
to minimize magnetic field exposure, especially when it comes to drivers. "We found considerable differences in the (magnetic field) levels
for different engines," Roosli said. These differences, he explained,
were mainly due to the construction of the engine -- such as the distance
placed between the driver and the electrical supply. Roosli and his colleagues stress that the findings apply to workers,
whose exposures to magnetic fields are far higher than those of train
passengers. "Train passengers spend considerably less time in trains than the
people with the occupations studied and their exposure levels and potential
health risk are therefore negligible," the researchers conclude. SOURCE: Occupational and Environmental Medicine, May 24, 2007 online. ADVERTISEMENT |
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©
1996-2007 Scientific American, Inc. All rights reserved. |
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Betreff: #554: Why 4 mG
is preferable to 100o mG as an acceptable health based standard |
Von: EMFacts Consultancy |
Datum: 20 Sep 2006 23:12:53 -0500 |
An: weather@golden.net |
A new entry titled '#554: Why 4 mG is preferable to 100o mG as an acceptable
health based standard' has been posted to EMFacts Consultancy.
The weblog version of this message
is at:
http://www.emfacts.com/weblog/index.php?p=554
In the last message note where Health
Canada blindly refers to ICNIRP's 1000mG residential exposure level as
an acceptable level for the affected residents of Tsawwassen. To Quote: "The
agency says residents would be exposed to electromagnetic fields that are
"well within" international guidelines -- which are based on studies
of humans, animals and cell systems."
This is the same problem we face in
Australia, be it Ross House, RMIT Building 108, Capalaba Post Office and a host
of other buildings were excessive 50 Hz magnetic fields are found and concerns
have been raised. "No need to worry as all levels are well below the safe
limits". The most recent example in Australia is close to home in
Tasmania. About a month ago I was contacted by two staff members from a special
needs school concerned about the high level of cancer amongst the staff, with a
further two breast cancer cases diagnosed after I was initially contacted. The
situation was concerning. The school was built right next to transmission
lines, with a large substation located under the building in the basement.
Heavy corrosion on the water pipes indicated the possibility of electrical
ground currents on the pipes which could give rise to unbalanced loads and high
magnetic fields. I advised the principle of the concerns and recommended that a
survey be conducted of the ! building by the education department. This was
done with Aurora Energy taking various readings in the school. However my
recommendations were not followed and the only readings taken were by the
substation and switchboards, not where people worked. This made the survey
worthless as far as finding out what people were actually being exposed too.
Suspiciously Aurora's readings of 10 to 12 mG immediately below the
transmission line were well less than half of my readings, taken at various
times of the day, over several days. The Aurora report then stated: "All
of the reading taken were well below the 1000 milligauss limit of exposure for
the general public as published in the interim Guidelines on Limits of Exposure
to 50/60 Hertz Electric and Magnetic Fields (1989)".
I replied to this with an email to
the education department that reliance on these high levels was no longer
justifiable as they were totally irrelevant to the cancer question, and gave
reasons why. Their reply ask me that, if I thought 1000 mG was not acceptable,
what level would I recommend. The following was my reply.
Don
************************************************************************
Why 4 mG is preferable to the
NH&MRC´c 1000mG as a reference level for a health based environmental EMF
exposure limit
Don Maisch Sept 7, 2006
EMFacts Consultancy
http://www.emfacts.com
Introduction
Over the past decade there have been
a number of buildings in Australia where concerns have been raised over
apparent excess rates of cancer and other illnesses amongst the occupants.
Examples are Ross House (Melbourne)(1) RMIT Building 108 (Melbourne)(2) and the
Capalaba Post Office (Queensland)(3). In each case, in response to concerns
that the illnesses may be due to 50 Hz extremely low frequency (ELF) magnetic
fields, and measurements were made, reassurance was given that the measured
levels were well below the National Health & Medical Research Council´s
Interim guideline reference level of 1000 milliGauss (mG) for residential
exposures (4). The impression given was that the NH&MRC limits were
designed to protect against the possibility of ill health as long as exposures
were kept under that level.
In the example of RMIT Building 108,
ELF magnetic field measurements were taken by EMC Technologies but it was
stated in their initial report that "the extra [extremely] low frequency
(ELF) magnetic field recommendations set by NH&MRC for the general population
were used as limit recommendations" (5). Individual room ELF magnetic
field measurements are given as well as the % of the NH&MRC´s 1000 mG
public limit recommendation (6). The reader was to assume that compliance with
the limits assured safety in relation to the apparent brain tumour cluster in
the top floor of the building. However in the RMIT Final Report, they made a
departure and used a reference level of 4 mG . Subsequent testing determined
that there was no association with the brain tumour cases and occupancy of
offices with ELF magnetic fields greater than 4 mG (7).
Another departure from the norm is
seen in the current controversy over the ABC studies at Toowong, Qld., where a
high incidence of breast cancer is reported. In this case, the expert panel
conducting the environmental risk assessment on all possible factors in the
building, has specifically stated, that in relation to ELF magnetic fields,
comparisons with other workplaces should be made and not just assessed against
the "accepted reference levels"(NH&MRC)(8).
This article briefly examines the
foundation of the NH&MRC recommendation of 1000mG, what level of health
protection it provides, and what may constitute a more realistic reference
level in relation to providing a measure of protection against possible cancer
and other illnesses in the built environment. The point being made is not that
there may be a link between EMF exposure and cancer and other illnesses in the
above mentioned cases, but that the NH&MRC Interim guidelines are irrelevant
to environmental EMF exposures, do not address cancer and other illnesses, and
therefore should not be used as a reference level in building EMF assessments.
The NH&MRC Interim guidelines
for 50 Hz
The ELF limit recommendations in the
NH&MRC Interim guidelines (1989) are based on the International Radiation
Protection Association´s (IRPA) interim guidelines which also served as the
basis for the current guidelines of the International Commission on
Non-Ionizing Radiation Protection (ICNIRP). The same rationale for setting
exposure limits applies to the ELF guidelines set by the UK´s National
Radiation Protection Board (NRPB). The rationale for all these guidelines is
based on providing health protection only against immediate health hazards from
high levels of exposure. This limitation was explained by the predecessor to
ARPANSA, the Australian Radiation Laboratory in 1994, in discussing a 1994
Senate report criticising the limitations to the standards.
To Quote:
"The criticism of the IRPA
interim guidelines (and consequently of the NH&MRC counterpart) derives
from their ambiguity about what parts of the available evidence can be used in
standard setting at present (and consequently what health effects can be
confidently prevented by their implementation) and the expectation of the
public. The NRPB has explicitly qualified the scope of their guidelines (based
on the same rationale as the IRPA limits):
Restriction on exposure to extremely
low frequency magnetic fields are expressed in terms of induced current density
and are intended to avoid the effects of induced electric currents on function
of the central nervous system such as the control of movement and posture,
memory, reasoning and visual processing" (McKinlay, 1993)" (9).
Similar comments about the
limitations and purpose of the NH&MRC guidelines were made in 1991 by Dr.
Keith Lokan, from the Australian Radiation Laboratory, in a conference paper
published in Radiation Protection in Australia:
"One thing which we have done,
though it has little direct bearing on the issue of chronic low level exposure,
is to adopt the (above) recommendations on field limits. These limits represent
plausible field values, below which immediate adverse health effects are
unlikely, and as such serve a useful purpose. They are not intended to provide
protection against possible cancer induction by continued exposure at the lower
field levels implicated in the studies..." (10).
As cancer takes many years to
develop after exposure to an environmental agent, such as asbestos (an obvious
example), the NH&MRC ELF limits are clearly not relevant to the above
mentioned cases. It is therefore deceptive to infer that compliance with such
limits removes the risk of cancer from exposure below these limits.
As clearly stated by Dr. Keith Lokan in 1991, the MH&MRC´s recommendation
of 1000 mG is not relevant to the question of exposure levels and cancer so any
reference to it in relation to cancer risk is not justified, to say the least.
A far more useful level from both a public health and an occupational health
and safety viewpoint would be one that is consistently related with an increase
risk or incidence of cancer in humans. A level of 4 mG is recommended for the
following reasons.
* On June 24, 1998, the National
Institute for Environmental Health Sciences (NIEHS) Working Group voted to
classify ELF-EMF as a Group 2B possible carcinogen. The Working Group saw this
as "A conservative, public health decision based on limited evidence for
an increased occurrence of childhood leukemia and an increased occurrence of
chronic lymphocytic leukemia in occupational settings."
The NIEHS Working Group identified a magnetic field level range of 2 –5 mG in
the scientific research literature as being related to an increased risk of
leukemia. They recommended that "prudence would establish firm EMF limits
below 2 mG by some reasonable margin of safety" (11).
* In 2001 the International Agency
for Research on Cancer (IARC) reviewed the scientific evidence on the potential
carcinogenicity of ELF - EMFs and using the IARC classification system,
classified power frequency EMFs as "possibly carcinogenic to humans",
based on a fairly consistent statistical association between a doubling of risk
of childhood leukemia and ELF magnetic field exposure above 4 mG. However, the
IARC found no consistent evidence that ELF magnetic fields increased cancer
risk in adults (12).
* The Advisory Group on Non-Ionizing
Radiation (AGNIR) in March 2001 called a 4 mG level as a "relatively
heavy" average exposure that is "associated with a doubling of the
risk of leukaemia in children under 15 years of age" (13).
* In a summary of the overall
evidence, Cindy Sage from Sage Associates, Santa Barbara, California, USA saw
an increased risk of both childhood and adult cancers at exposure ranges
associated with increased risk of cancer in the order of 2 –5 mG (Time Weighted
Average-TWA) and up to 16 mG intermittent exposure levels (14).
* In an interview with Microwave
News in May 2001, Dr. David Savatz, said that he was pessimistic about the
value of conducting further epidemiological studies because he did not think
that the public health threat was great enough to prioritize EMF work over
other research. However he agreed with recommendations to follow a policy of
prudent avoidance – reducing exposures when one can do so at low cost. He felt
that "the epidemiological research suggests that limiting exposures to
less than 0.4 – 0.5 uT (4 – 5 mG) could have a health benefit" (15).
* On 18th March 2002, a Queensland
judge made a ruling that ELF-EMFs from a proposed substation next to a
predominantly residential area, should not exceed 0.4 microtesla (4 mG).
Energex, the power supply company named in the case accepted the decision. The
judge´s precautionary ruling stated the following:
"The issues relating to the
placement of the substation are significantly different from those that may
have existed in the past, as research now available accepts that a possible
risk to the surrounding community may exist. Not only were the magnetic field
levels in and around the substation to be taken into account, but recognition
of the fields from the infeed and distribution cables had to be limited, by
undergrounding, and monitoring, to ensure compliance with the 0.4 microtesla
maximum allowed magnetic flux density" (16).
According to Powerwatch News, Roger
Lamb, a Melbourne based electrical engineer who sat in for the five day
hearing, said it would hopefully provide a model for the resolution of similar
situations in the future. In response to the level of scientific uncertainty as
to the extent of a health hazard, which Energex´s expert witnesses couldn´t
deny, the judge stated that "The supply of electricity must not only be
reliable, it must be as safe as it reasonably can be" (17).
* In June 1995, the Australian
Services Union and library equipment manufacturer RAECO signed an Australia
wide agreement that the Union considered necessary to protect ASU library
members from exposure to ELF-EMFs associated with some library security
systems. The agreement stated that no ASU member should be exposed to a
magnetic field of more than 4 mG averaged over a normal working day. As for the
justification for using a 4 mG level the agreement stated that:
" Current studies indicate that
Extra Low Frequencies (ELFs) increase susceptibility to cancers, they do not
generate cancers. It is thought that ELF´s "degrade" the immune
system. This susceptibility to cancers is only during the period of exposure;
it doesn´t result in permanent degradation of the immune system. Therefore the
longer the exposure, the longer the opportunity for the cancers to take hold.
The current understanding is that the greatest exposure risk is to the head and
torso. Current evidence suggests health problems could arise with prolonged
exposure above 4 mG" (18).
* An important development in Europe
has been the decision in 2004-5 by the he Dutch Ministry of Housing, Spatial
Planning and the Environment to prepare a precautionary policy in setting a 4
mG (0.4 uT) exposure limit for new transmission lines, and banning the
construction of buildings and developments that would expose people to
prolonged magnetic fields of 4 mG and over (19).
In response to this precautionary
policy, TenneT the administrator of the Dutch electrical grid, in tandem with
Holland Railconsult, have designed a new high voltage transmission line concept
featuring significantly reduced magnetic field intensity compared to existing
lines. This will ensure that the maximum levels at the right-of-way boundary of
the new transmission lines will conform to the 4 mG limit. (20)
Conclusion
As far as how common environmental
exposures to 4 mG are in Australia, no comprehensive nation-wide estimations
have yet been done. A small scale survey by the Australian Radiation Protection
& Nuclear Safety Agency (ARPANSA) in Melbourne in 2005 found approximately
12%of homes surveyed had levels above 4 mG in areas where children were likely
to spend large amounts of time, but this could not be extrapolated as typical
in Australian homes (21). In the U.S. it has been estimated that about 4% of
the US population is subjected to prolonged ELF-EMF levels at or greater than 4
mG (22). If we consider 1000mG however, it would be highly unlikely that any
homes or workplaces (outside of electrical switchyards, aluminum smelters,
etc.) in Australia would ever approach this high level.
So, in response to the concerns of
people working in buildings where there are apparent cancer clusters or other
illnesses, and EMFs are thought to be a possible issue, we might ask: Which is
preferable as a reference level: The NH&MRC´s 1000 mG limit that is
"not intended to provide protection against possible cancer
induction" or one (4 mG) that has been classified as "possibly
carcinogenic to humans"?
References
1) http://www.emfacts.com/papers/ross-house.html
Accessed Sept 6, 2006.
2) http://www.emfacts.com/papers/rmit.pdf Accessed Sept 6, 2006.
3) http://www.emfacts.com/weblog/?p=480 Accessed Sept. 6, 2006.
4) For occupational settings the NH&MRC reference level is 5000mG.
5) NH&MRC Interim guidelines on limits of exposure to 50/60 Hz electric and
magnetic fields, Radiation Health Series 30, 1989.
6) Radiofrequency Fields Survey at RMIT Building 108, EMC Technologies, Interim
Report No. M060514_1 Ver 3, http://mams.rmit.edu.au/ypwsbsrq3q3p1.pdf Accessed
June 12, 2006.
7) Medical Investigation of Tumours Detected in RMIT Building 108, Southern
Medical Services Pty.Ltd., Final Repot, August 1, 2006.
8) Breast cancer cluster, ABC Toowong Queensland, First progress report of the
independent Review and Scientific Investigation Panel: Outline of proposed
approach to its task.
http://72.14.235.104/search?q=cache:cCqFQEA2CjcJ:abc.net.au/corp/pubs/documents/ABC_Progress_report_1_final_060817.doc+ABC+studios+Toowong+Breast+cancer&hl=en&gl=au&ct=clnk&cd=1&ie=UTF-8
Accessed Sept. 6, 2006.
9) Australian Radiation Laboratory, ?Comments on the Maisch Report,
Non-Ionizing Electromagnetic Fields and Human Health´, December 1994.
10) Lokan KH, Risk, ?Risk Perception and Regulation-What Should the Regulator
Do?´ Radiation Protection in Australia, Vol. 9, No.4: 134-136, 1991.
11) ?Assessment of Health Effects from Exposure to Power-Line Frequency
Electric and Magnetic Fields´, NIEHS EMF Working Group Report, National
Institutes of Health, 1998.
12) Slesin L, ?IARC Panel Finds EMFs Are Possible Carcinogens´,
http://www.mikeholt.com/mojonewsarchive/USEI-HTML/HTML/EMFsPossibleCarcinogens~20020519.htm
Accessed June 15, 2006.
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Group on Non-Ionizing Radiation´, Documents of the NRPB, vol. 12, no.1, March
6, 2001.
http://www.hpa.org.uk/radiation/publications/documents_of_nrpb/abstracts/absd12-1.htm#concs
Accessed June 12, 2006.
14) Sage CL, Sage SA, ?Briefing Report on Electromagnetic Fields (Health
Effects/Policy/Site Planning´, unpublished, Jan. 2006
15) Savitz D, ?EMF Epidemiology Has Reached Its Limits´, Microwave News, vol.
XXI, no. 3, page 3, May/June 2001.
16) As reported in Powerwatch News (UK), March 18, 2002, http://www.powerwatch.org.uk/news/20020506_emf.asp
Accessed June 19, 2006.
17) Ibid.
18) Electromagnetics Forum, ?Agreement to limit EMF levels in libaries sets
precedent, vol. 1, no. 1, Article 14, December 1996.
http://www.emfacts.com/forum/issue1/mag_14.html Accessed June 24, 2006.
19) http://www.tennet.nl/english/projects/news/wintrack.aspx Accessed Sept. 6,
2006.
20) http://www.tennet.nl/english/images/050531_Wintrack_UK_DEF_tcm43-9884.pdf
Accessed Sept. 6, 2006.
21) Karipidis KK, Martin L, "Pilot Study of Residential Power Frequency
Magnetic Fields in Melbourne", ARPANSA Technical Report Series No. 142,
2005.
22) Kheifets L, Shimkhada R, ?Review-Childhood Leukemia and EMF: Review of the
Epidemiological Evidence´, Bioelectromagnetics Supplement 7, S51-S59, 2005.
.