7.—(1) References in Part 2 of this Schedule to a substance, or to the release into water of a substance, listed in this sub-paragraph or to its release in a quantity which, in any 12-month period, is greater than the background quantity by an amount specified in this sub-paragraph are references to the following substances and amounts—
1 Where both Atrazine and Simazine are released, the figure for both substances in aggregate is 350 grams. | |
| Substance | Amount greater than the background quantity (in grams) in any 12-month period |
|---|---|
| Mercury and its compounds | 200 (expressed as metal) |
| Cadmium and its compounds | 1,000 (expressed as metal) |
| All isomers of hexachlorocyclohexane | 20 |
| All isomers of DDT | 5 |
| Pentachlorophenol and its compounds | 350 (expressed as PCP) |
| Hexachlorobenzene | 5 |
| Hexachlorobutadiene | 20 |
| Aldrin | 2 |
| Dieldrin | 2 |
| Endrin | 1 |
| Polychlorinated Biphenyls | 1 |
| Dichlorvos | 0.2 |
| 1, 2-Dichloroethane | 2,000 |
| All isomers of trichlorobenzene | 75 |
| Atrazine | 3501 |
| Simazine | 3501 |
| Tributyltin compounds | 4 (expressed as TBT) |
| Triphenyltin compounds | 4 (expressed as TPT) |
| Trifluralin | 20 |
| Fenitrothion | 2 |
| Azinphos-methyl | 2 |
| Malathion | 2 |
| Endosulfan | 0.5 |
(2) In sub-paragraph (1), “background quantity” means, in relation to the release of a substance resulting from an activity, such quantity of that substance as is present in—
(a)water supplied to the site where the activity is carried on,
(b)water abstracted for use in the activity, and
(c)precipitation onto the site on which the activity is carried on.