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1. Troubleshooting

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

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