Tips & Warnings. Steam the tamales in a specified steamer basket. If you have a steamer pot or basket that does not use a stove top for heating, you will need to pour boiling water into the base of the pot and cover with a lid for 1 to 2 hours. Make reference to the instruction manual provided for your particular model to verify.
Arsenic is a trace element that occurs naturally in very small amounts in the diet. Its exact functions are not known. The estimated adult daily intake of arsenic from a typical diet is 12-50 mcg. A dietary requirement of 12-25 mcg/day has been suggested.
Arsenic (chemical symbol As) occurs naturally in soil and bedrock in many parts of the United States, including parts of Massachusetts. During the 1800s it was mined commercially in New Hampshire, but since 1985 arsenic used in the U.S. has been imported.Activities that could have left arsenic residuals include apple orchard spraying, coal ash disposal, and use of some pressure treated wood.uring the 1800s it was mined commercially in New Hampshire, but since 1985 arsenic used in the U.S. has been imported. Activities that could have left arsenic residuals include apple orchard spraying, coal ash disposal, and use of some pressure treated wood.