Magma .
A pH level below 2 or above 12 is generally considered hazardous. These extreme pH levels can be corrosive and can pose significant health risks. It's important to handle substances with extreme pH levels carefully and use appropriate safety measures.
A placard identifying hazard class 6 describes the presence of a poisonous gas. For an image, see the related link, below.
Plutonium is considered highly hazardous due to its radioactivity, as it emits alpha particles that can damage cells in the body and increase the risk of cancer. Ingesting or inhaling even small amounts of plutonium can be harmful, and proper safety protocols must be followed when handling this material to prevent exposure.
About 10.7 inches below the Pacific or Atlantic Ocean floor.
Magma is mineral material that is in liquid form due to it's high temperature, and usually contains bubbles of gas. When it cools (below about 1400 degrees F) it becomes a solid.
Precautions for safe handling and use The name of the chemical materials as it appears on the warning label and hazardous materials inventory in the work place Who can provide additional information on the hazardous chemical and appropriate emergency procedures
One example of a substance that can exist as both a liquid and a solid is honey. At room temperature, honey is a thick liquid, but if cooled below its freezing point, it can solidify into a semi-solid state.
It is an circuit and find water level of material in a container falls below or above a set point with help of alarm. http://wiki.answers.com/What_is_a_level_alarm
metal liquid
Saturn's moon Titan has liquid methane on and presumably below the surface.
The rates of pay are very low and most definitely below minimum wage. Employees may be subject to employer abuse and work with hazardous material with little or no protective gear.