Table 5-2 of the HRS Rule (page 51647)
|Tier||Measure||Units||Equation for assigning valuea|
|A||Hazardous Constituent Quantity (C)||lb||C|
|Bb||Hazardous Wastestream Quantity (W)||lb||W/5,000|
|Surface impoundment c||yd3||V/2.5|
|Tanks and containers other than drums||yd3||V/2.5|
a Do not round to nearest integer.
b Convert volume to mass when necessary: 1 ton=2,000 pounds=1 cubic yard=4 drums=200 gallons.
c Use volume measure only for surface impoundments containing hazardous substances present as liquids. Use area measures in Tier D for dry surface impoundments and for buried/backfilled surface impoundments.
d If actual volume of drums is unavailable, assume 1 drum=50 gallons.
e Use land surface area under pile, not surface area of pile.