Our breathable air filling is of the highest possible quality. We comply with CSA Z.275 which is the most demanding standard in the industry. An external laboratory analyzes the quality of our air 3-4 times a year. We also have an on-line analyzer for carbon monoxide which analyzes continuously for the optimum safety of our divers.
These standards are required for commercial and scientific divers. That's why the Montreal Biodôme trusts Total Diving for its divers.
Air test (2 required/year):
There are two norms that applies to compressed breathable air in Quebec,
the CAN/CSA Z180.1-13 and the CAN/CSA Z275.2-15.
Both norms are sensibly the same. One is for the compressed breathable air and associated systems, while the other concerns safety regulations of occupational divers. The Z180.1 and Z275.2 sets standards for compressed breathable air for firemen or divers at 15,3 MPa (2216 psi).
The first, Z180, as demonstrated in Table 1, specifies that a maximum of ≤ 5mL/m³ (ppm) of carbon monoxide may be present in the analyzed air.
The other, Z275, as demonstrated in Table 1, specifies that a maximum of ≤ 3mL/m³ (ppm) of carbon monoxide may be present in the analyzed air, due to the increase in partial pressure of the air blend breathed by the diver.
The remainder of the tables are identical. Logic dictates that we use the most stringent norms due to the activity we engage in.
Other point, the Z180.1-13 norm at annex A.8.4.2 “Postes de remplissage des bouteilles d'APRA” fill stations of APRA cylinders, specifies that cylinders must be filled by one of these fill stations. Scuba cylinders do not fit in, as they are larger.