Characteristics: Bismuth is a brittle, silvery-green metal that has a low melting temperature and high specific gravity. Being both stable and non-toxic, bismuth is often used as a replacement for toxic metals such as antimony, cadmium, lead and mercury.
1 (Minimums vary by location and tank size, and can range from 100-1,500 gallons.) More often, the propane company charges a fee of anywhere from $25-$250 a year but averaging around $75-$130 annually, depending on local rates, the size of the tank and whether it's aboveground or underground.
1 The annual average price of gasoline in 2014 was $3.34 per gallon, which was about 15 cents less than last yearâs annual average of $3.49 per gallon.2  In other recent years, gas prices have averaged $3.60 (2012), $3.51 (2011) and $2.78 (2010). Consumers this month spent about $215 million per day less on gasoline compared to December 2013. 2  Todayâs national average price of gas is $1.06 per gallon less than a year ago. 3  Many drivers are saving $15-$30 every time they go to the gas station compared to a year ago.