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for reporting on the substances of concern and instead sets forth a much less definitive standard
requiring that the business demonstrate with certainty that there is "no significant risk" resulting from
exposure. With respect to carcinogens, the "no significant risk" level is defined as the level which is
calculated to result in not more than one excess case of cancer in 100,000 individuals exposed over a
70-year lifetime. In other words, if you are exposed to the chemical in question at this level every day
for 70 years, theoretically, it will increase your chances of getting cancer by no more than 1 case in
100,000 individuals so exposed. With respect to reproductive toxicants, the "no significant risk" level
is defined as the level of exposure which, even if multiplied by 1,000, will not produce birth defects or
other reproductive harm. In other words, the level of exposure is below the "no observable effect
level," divided by 1,000. (The "no observable effect level" is the highest dose level which has not been
associated with observable reproductive harm in humans or test animals.) Proposition 65 does not
clarify whether exposure is to be measured only in normal operation, or in the event of misuse such as
intentionally damaging, incinerating or consuming an Ambient Weather Product or component and
Ambient Weather has not attempted to evaluate the level of exposure.
A Proposition 65 warning means one of two things: (1) the business has evaluated the exposure and
has concluded that it exceeds the "no significant risk level"; or (2) the business has chosen to provide a
warning simply based on its knowledge about the presence of a listed chemical without attempting to
evaluate the exposure. The California government has itself clarified that "The fact that a product
bears a Proposition 65 warning does not mean by itself that the product is unsafe." The government
has also explained, "You could think of Proposition 65 more as a 'right to know' law than a pure
product safety law."
While using Ambient Weather Products as intended, we believe any potential exposure would be
negligible or well within the "no significant risk" range. However, to ensure compliance with
California law and our customers' right to know, we have elected to place the Proposition 65
warning signs on Ambient Weather Products.
For further information about California's Proposition 65, please
visit
https://oehha.ca.gov/prop65/background/p65plain.html
