The biocide used for the ACP comes in two concentrations. Small or intermittent use in general public will be best served with the 10% concentration whilst professional use will require the higher concentration. The dilution tables on this site are all based on the 40% product.
Rated hose connectors and face / skin protection are essential safety items in all circumstances. Procedures for risk assessment are well established and accidents very rare. When it happens it is generally a splash of solution when disconnecting a hose after closing the mains tap and put the goggles away but without releasing the pressure stored in the hose reel. Beware of tiredness.
For intermittent use the general public grade is diluted and sprayed onto the surface with a garden sprayer. In many minor ground applications a watering can and a fine rose is just right.