CONVERSION FIGURES
| 1 Metre | 3.3 feet |
| 1 litre | 1.8 pints |
| 4.5 litres | 1 gallon |
| 1 cubic metre | 35.3 cubic feet / 1000litres / 220 galloons |
| 1 gram | 0.035 ounce |
| 28.3 grams | 1 ounce |
| 1 kilogram | 2.2 pounds |
| 100ppm | 1 litre per 10,000 litres |
| 50ppm | 1 litre per 20,000 litres |
| 20ppm | 1 litre per 50,000 litres |