Add the normal occupant activity score and the three averages to get a total.
| Assessment factor | Score | Examples of score variables | |
|---|---|---|---|
| Normal occupant activity | |||
| Main type of activity in area | 0 | Rare disturbance activity (eg little used store room) | |
| 1 | Low disturbance activities (eg office type activity) | ||
| 2 | Periodic disturbance (eg industrial or vehicular activity which may contact ACMs) | ||
| 3 | High levels of disturbance, (eg fire door with asbestos insulating board sheet in constant use) | ||
| Total | |||
| Likelihood of disturbance | |||
| Location | 0 | Outdoors | |
| 1 | Large rooms or well-ventilated areas | ||
| 2 | Rooms up to 100 m2 | ||
| 3 | Confined spaces | ||
| Accessibility | 0 | Usually inaccessible or unlikely to be disturbed | |
| 1 | Occasionally likely to be disturbed | ||
| 2 | Easily disturbed | ||
| 3 | Routinely disturbed | ||
| Extent/amount | 0 | Small amounts or items (eg strings, gaskets) | |
| 1 | £10 m2 or £10 m pipe run. | ||
| 2 | >10 m2 to £50 m2 or >10 m to £50 m pipe run | ||
| 3 | >50 m2 or >50 m pipe run | ||
| Average of scores for location, accessibility and extent/amount | |||
| Human exposure potential | |||
| Number of occupants | 0 | None | |
| 1 | 1 to 3 | ||
| 2 | 4 to 10 | ||
| 3 | >10 | ||
| Frequency of use of area | 0 | Infrequent | |
| 1 | Monthly | ||
| 2 | Weekly | ||
| 3 | Daily | ||
| Average time area is in use | 0 | <1 hour | |
| 1 | >1 to <3 hours | ||
| 2 | >3 to <6 hours | ||
| 3 | >6 hours | ||
| Average of scores for number of occupants, frequency of use, and average time in use | |||
| Maintenance activity | |||
| Type of maintenance activity | 0 | Minor disturbance (eg possibility of contact when gaining access) | |
| 1 | Low disturbance (eg changing light bulbs in asbestos insulating board ceiling) | ||
| 2 | Medium disturbance (eg lifting one or two asbestos insulating board ceiling tiles to access a valve) | ||
| 3 | High levels of disturbance (eg removing a number of asbestos insulating board ceiling tiles to replace a valve or for recabling) | ||
| Frequency of maintenance activity | 0 | ACM unlikely to be disturbed for maintenance | |
| 1 | £1 per year | ||
| 2 | >1 per year | ||
| 3 | >1 per month | ||
| Average of scores for type of maintenance activity and frequency of maintenance activity | |||
| Total |
Add the four scores to get a total.
| Sample variable | Score | Examples of scores |
|---|---|---|
| Product type (or debris from product) | 1 | Asbestos reinforced composites (plastics, resins, mastics, roofing felts, vinyl floor tiles, semi-rigid paints or decorative finishes, asbestos cement etc) |
| 2 | Asbestos insulating board, mill boards, other low density insulation boards, asbestos textiles, gaskets, ropes and woven textiles, asbestos paper and felt | |
| 3 | Thermal insulation (eg pipe and boiler lagging), sprayed asbestos, loose asbestos, asbestos mattresses and packing | |
| Extent of damage/deterioration | 0 | Good condition: no visible damage |
| 1 | Low damage: a few scratches or surface marks; broken edges on boards, tiles etc | |
| 2 | Medium damage: significant breakage of materials or several small areas where material has been damaged revealing loose asbestos fibres | |
| 3 | High damage or delamination of materials, sprays and thermal insulation. Visible asbestos debris | |
| Surface treatment | 0 | Composite materials containing asbestos: reinforced plastics, resins, vinyl tiles |
| 1 | Enclosed sprays and lagging, asbestos insulating board (with exposed face painted or encapsulated), asbestos cement sheets etc | |
| 2 | Unsealed asbestos insulating board, or encapsulated lagging and sprays | |
| 3 | Unsealed laggings and sprays | |
| Asbestos type | 1 | Chrysotile |
| 2 | Amphibole asbestos excluding crocidolite | |
| 3 | Crocidolite | |
| Total score |
