| Variable | Description | Type | Begin Column | End Column |
|---|---|---|---|---|
| STID | FIPS State ID | I2 | 1 | 2 |
| CYID | FIPS County ID | I3 | 3 | 5 |
| ASCT | Area Source Category | A15 | 6 | 20 |
| PRRT | Annual Process Rate (process units/year) | I13 | 21 | 33 |
| ACUN | Activity units | A15 | 34 | 48 |
| DEC | Fractional December Throughput | F5.3 | 49 | 53 |
| JAN | Fractional January Throughput | F5.3 | 54 | 58 |
| FEB | Fractional Febuary Throughput | F5.3 | 59 | 63 |
| MAR | Fractional March Throughput | F5.3 | 64 | 68 |
| APR | Fractional April Throughput | F5.3 | 69 | 73 |
| MAY | Fractional May Throughput | F5.3 | 74 | 78 |
| JUN | Fractional June Throughput | F5.3 | 79 | 83 |
| JUL | Fractional July Throughput | F5.3 | 84 | 88 |
| AUG | Fractional August Throughput | F5.3 | 89 | 93 |
| SEP | Fractional September Throughput | F5.3 | 94 | 98 |
| OCT | Fractional October Throughput | F5.3 | 99 | 103 |
| NOV | Fractional November Throughput | F5.3 | 104 | 108 |
| WIN | Winter Throughput (Dec-Feb) (%) | I3 | 109 | 111 |
| SPR | Spring Throughput (Mar-May) (%) | I3 | 112 | 114 |
| SUM | Winter Throughput (Jun-Aug) (%) | I3 | 115 | 117 |
| FAL | Fall Throughput (Sep-Nov) (%) | I3 | 118 | 120 |
| HOURS | Code Value for Hourly Operation | I2 | 121 | 122 |
| DAYS | Code Value for Daily Operation | I2 | 123 | 124 |
| WEEKS | Weeks of Operation per Year | I2 | 125 | 126 |
| DAYYEAR | Days of Operation per Year | I3 | 127 | 129 |
| HOURYEAR | Hours of Operation per Year | I4 | 130 | 133 |