Some states say that social hosts, including employers, must monitor how much their guests drink and make “reasonable assumptions” about whether they're impaired. You need to designated monitors or other persons to do this; you also need to show them how to judge impairment. Here's a form to help you do that. It shows the legal rate of impairment by Blood Alchohol Content of men and women of different weights. The data come from U.S. government sources. And while they're not 100 percent accurate, they should be enough to enable your monitors to make reasonable assumptions about impairment.

Your body can get rid of one drink per hour.
One drink is 1.5 oz. of 80 proof liquor, 12 oz. of beer, or 5 oz. of table wine.

Your body can get rid of one drink per hour.
One drink is 1.5 oz. of 80 proof liquor, 12 oz. of beer, or 5 oz. of table wine.
Data supplied by the Pennsylvania Liquor Control Board.

NOTES

• For purposes of this chart, one drink is equal to 1.5 oz. of 80 proof liquor, 12 oz. of beer or 5 oz. of table wine.
• Under Canadian Criminal Law, a person with a .08% Blood Alcohol Concentration (BAC) is considered legally impaired and can’t drive.
• Impairment for everybody begins with the first drink.

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