| Use this table to determine the appropriate Range Value for both the maximum amount present on any single day, and also the average daily amount. To calculate the average amount, total all the daily weights and divide by the number of the days the chemical was present at the site. Note that all these ranges are based on pounds (lb).
| Range Value | Weight Range (in pounds) |
| | From | To |
| 01 | 0 | 99 |
| 02 | 100 | 999 |
| 03 | 1,000 | 9,999 |
| 04 | 10,000 | 99,999 |
| 05 | 100,000 | 999,999 |
| 06 | 1,000,000 | 9,999,999 |
| 07 | 10,000,000 | 49,999,999 |
| 08 | 50,000,000 | 99,999,999 |
| 09 | 100,000,000 | 499,999,999 |
| 10 | 500,000,000 | 999,999,999 |
| 11 | 1 billion | higher than 1 billion |
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