Containment level H2
| Containment level H2 | |
| Barrier strip | Type of safety barrier |
| NH4 // AM | OSNH4/H2 OSAM/H2 |
| A-NH-94 // A-AM | O3A-1,3/H2-1 |
Containment level H3
| Containment level H3 | |
| Barrier strip | Type of safety barrier |
| NH4 // AM | OSNH4/H3 |
| A-NH-94 // A-AM | O4A-1,3/H3-1 |