In 1995 the Irish Air Corps commissioned an independent third party organisation to carry out air quality testing in the Engine Repair Flight building. ERF comprised the Engine Overhaul facility, the Non Destructive Testing workshop and the Machine shop. Avionics Squadron was located in the same physical building as the ERF and the open attic spaces meant chemical vapours & fumes from either unit were free to flow in either direction.
The Avionics / ERF building was also less than 20m downwind from the 3m high Spray Paint Shop exhaust stack which exhausted benzene, hexamethylene diisocyanate, toluene and xylene.
Ambient Air Monitoring for Health & Safety at Work Report from the 2nd of August 1995 found that #Dichloromethane (also known as Methylene chloride) was found in some areas to be 175ppm. At the time The most stringent health and safety limits for #DCM were 50 ppm (TWA for 8 hours) and 126 ppm (STEL for 15 minutes).
Personnel, including other ranks employed in the Formation Safety Office, were never informed of these results. Avionics / ERF personnel were left in situ for a further 12 years before the workshops were finally condemned & demolished and needlessly exposed to #DCM and other chemicals.
Significantly Dichloromethane metabolises as Carbon Monoxide once inhaled but is lethal in many other different ways. We have at least 10 untimely deaths of men who worked in this building alone, their average age of death was 49.3 years and the youngest was only 32.
So we have one state body warning the general public about the dangers of Carbon Monoxide, while another state body hid evidence of a known carbon monoxide threat from personnel working in a heavily contaminated facility.
Shaun Wood worked was a painter and finisher at Royal Air Force (RAF) bases across the world. During the early 1990s he was involved in the very intensive work preparing Tornado aircraft for the first Gulf War, in particular gluing anti-missile patches to the aircraft. This work was often done in confined spaces over long working hours. He generally wore a respirator but these were not really adequate for the circumstances.
Shaun has been diagnosed with Multiple System Atrophy (MSA), which is a debilitating Parkinsonian syndrome that affects the nervous system. He is just 53 years of age.
Throughout his work Shaun was exposed to various solvents, but primarily trichloroethylene and dichloromethane. There is not a great deal of information about exposure to these solvents in aircraft maintenance. I have seen results from a survey carried out at an RAF base in Scotland where dichloromethane levels were measured during paint striping in the cockpit area of a Nimrod aircraft. There was only 1.5 m2 of paint removed, but the peak air concentrations were about 700 mg/m3. Results from three monitoring surveys where the British Health and Safety Executive sampled for dichloromethane during paint stripping on aircraft are shown in the following figure. The mean levels measured in each of these surveys were: 330, 790 and 1,960 mg/m3, and the highest individual level measured was 3,590 mg/m3.
Read full article on OH-world.org A blog about exposure science and occupational hygiene
Below is a photo of one of the locations in the Irish Air Corps that used Dichloromethane, namely the NDT Shop of Engine Repair Flight. Yes that is a stream of the chemicals dripping out of the extractor fan and running down the wall. And yes that is dichloromethane, cresylic acid and the hexavalent sodium chromate all over the floor. The small barrel that is being dissolved by its contents contains Hydrofluoric Acid.
Some extracts from the Ambient Air Monitoring For Health and Safety at Work report dated 2nd August 1995
Dichloromethane levels were measured in the engine shop in Wednesday the 12th and Thursday the 13th of July 1995 at the behest of Captain John Maloney who is still serving in the Irish Air Corps
The level of dichloromethane found in ambient air in the engine cleaning area exceeded health and safety limits.
Levels of Dichloromethane were measured at 175.9ppm (622.5 mg/m3) while the TWA health & safety limit for this chemical in 1995 was 50ppm.
Significant levels of all parameters monitored were found in nearly all ambient air samples taken in the engine cleaning area.
The ventilation in all areas monitored was deemed to be insufficient. It is thus recommended that mechanical heating and ventilation systems be adapted designed and installed in all areas monitored.
To summarise, the Irish Army Air Corps knew that Dichloromethane levels in the NDT shop in 1995 exceeded health & safety limits by 3.5 times yet officer management…
LEFT personnel of all ranks and none to rot in this exceptionally toxic working environment for a further 12 years.
IGNORED the recommendation to design and install design a proper ventilation system, (they stuck in 2 x Xpelairs).
NEVER re-tested the environment to see if the Xpelair fans worked, we suspect they made things worse by increasing evaporation rate.
NEVER informed personnel of enlisted ranks that their workplace was contaminated to dangerous levels.