Establishing occupational exposure limits for airborne asbestos

Project Particularscape-logo

Client:    Cape Plc

Time frame:   2 weeks

Pumps/Day:   12

Project Overview

MSS provided independent, non-biased air monitoring and dust monitoring at Aberthaw Power Station to establish occupational exposure limits for airborne asbestos. Air monitoring was undertaken in 51 areas around the site. Fibre counts and gravimetric analysis of the filters for dust were undertaken on site to UKAS standards.



Airborne asbestos is the most dangerous, the analysts are BOHS P403 and P404 minimum, qualified and work in accordance to HSG248 ‘The Analyst’s Guide for Sampling, Analyst’s and Clearance Procedures’ to ensure that the asbestos is dealt with responsibly.

Aberthaw Power Station has a high number of Asbestos Containing Materials (ACM’s) which remain in-situ. Therefore regular reassurance air monitoring and dust monitoring is essential to protect workers on-site.

Working in Partnership

MSS have been working in partnership with Cape and their site contractors for several years. We have a good understanding of site operations, resulting in the successful and smooth process of maintaining safe occupational exposure limits for airborne asbestos every year at the Power Station.


To ensure the highest quality, monthly fibre quality checks are carried out and the participation of the Regular Inter-laboratory Counting Exchange scheme is partaken quarterly. The analysts carry out monthly re-checks on operational slides, including all clearance slides and 1 in 20 for all other slides.