Answer: Rift zones are common places for igneous rock to form because the pulling apart of rocks decreased the pressure on buried rocks.
Explanation: magma can then form and solidify.
What is the legal limit?
The lowest concentration that can officially be reported for any constituent in drinking water is known as the "Legal Limit".
Contamination of water:
The level that safeguards human health and that water systems can attain with the finest technology is reflected in the regulatory limit for a contaminant.
<u><em>How does it occur:</em></u>
- Plumbing components are the main way that lead and copper enters the drinking water. The health effects of lead and copper exposure can range from brain damage to stomach discomfort.
- Nitrogen, bleach, salts, pesticides, metals, bacterial toxins, and human or animal medications are examples of chemical pollutants. Organisms in the water are biological pollutants. Other names for them include microorganisms and microbiological pollutants.
In order to control corrosion, the system must take a variety of additional measures if lead concentrations reach an action threshold of 15 ppb or copper concentrations exceed an action level of 1.3 ppm in more than 10% of measured customer taps.
Learn more about the contamination of water here,
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I think it is b sorry if wrong
