AMOUNT EXIGIBLE FOR MINE TAILINGS DEPOSITED IN AN ACCUMULATION AREA
1. The annual duties provided for in section 12 are composed, in particular, of an amount calculated for an establishment’s mine tailings deposited in an accumulation area. That amount is calculated in the following manner:
Fmt × [(base amount) + ((Tmt - L) × u.r.)]
where
F = weighting factor established by category of mine tailings as provided for in Table I
mt = category of mine tailings referred to in Table I
Base amount = amount (in $) established in accordance with Table II in relation to the interval corresponding to the quantity of mine tailings deposited yearly in an accumulation area
Tmt = tonnage of mine tailings deposited in an accumulation area during the preceding year of operation of the establishment, calculated on a dry basis in metric tons
L = lower limit of the interval provided for in Table II determined in relation to the quantity of mine tailings deposited yearly in an accumulation area
u.r. = unit rate (in $ per 1,000 metric tons) established in accordance with Table II in relation to the interval corresponding to the quantity of mine tailings deposited yearly in an accumulation area
Table I
Mine tailings and weighting factor
_________________________________________________________________________________
| | |
| Categories of mine tailings (mt) | Weighting factor(F) |
|___________________________________________________|_____________________________|
| | |
| Acid-generating or cyanide-containing mine | |
| tailings | 4 | | | |
|___________________________________________________|_____________________________|
| | |
| Inert mine tailings | 0.5 |
|___________________________________________________|_____________________________|
| | |
| Radioactive or high-risk mine tailings | 6 |
|___________________________________________________|_____________________________|
| | |
| Others | 1 |
|___________________________________________________|_____________________________|
Table II
Applicable base amount and unit rate
_________________________________________________________________________________
| | | |
| Quantity of mine tailings | Base amount ($) | Unit rate |
| deposited yearly in an | | (in $ per 1,000 |
| accumulation area | | metric tons) |
| (in metric tons), per | | (u.r.) |
| interval | | |
|_______________________________|_________________________|_______________________|
| | | |
| Less than 1 million | 0 | 20.20 |
|_______________________________|_________________________|_______________________|
| | | |
| Equal to or greater than | 20,200 | 25.25 |
| 1 million, but less than | | |
| 10 million | | |
|_______________________________|_________________________|_______________________|
| | | |
| Equal to or greater than | 247,450 | 27.25 |
| 10 million, but less than | | |
| 30 million | | |
|_______________________________|_________________________|_______________________|
| | | |
| 30 million and more | 792,850 | 32.25 |
|_______________________________|_________________________|_______________________|
2. For the purposes of Table I of section 1 of this Schedule,
(1) Acid-generating mine tailings means mine tailings whose total sulphur content is greater than 0.3% and having any of the following characteristics:
(a) a net acid neutralization potential (NNP) less than 20 kg CaCO3/metric ton of mine tailings;
(b) a result less than 3 for the following equation:
Acid neutralization potential (NP)
_________________________________________
Acid generation potential (AGP);
(2) Cyanide-containing mine tailings means mine tailings, originating from a process using cyanides;
(3) Inert mine tailings means mine tailings rejected through ore extraction that are not economically profitable and may not be qualified as acid-generating, radioactive or high-risk mine tailings;
(4) Radioactive mine tailings means mine tailings that emit ionizing radiations (S) and for which the result of the following equation is greater than 1:
where
C = specific activity for each radioelement present in a kilogram of mine tailings, expressed in kilobecquerels per kilogram (kBq/kg)
A = maximum specific activity mentioned in Schedule 1 to the Regulation respecting hazardous materials (chapter Q-2, r. 32) for each radioelement present in a kilogram of mine tailings, expressed in kilobecquerels per kilogram (kBq/kg)
n = radioelement present in a kilogram of mine tailings;
(5) High-risk mine tailings: mine tailings having any of the following characteristics:
(a) mine tailings that produce leachate containing contaminants in a concentration greater than those mentioned in the Table below:
Table III
High-risk mine tailings
_________________________________________________________________________________
| | |
| Contaminants | Concentration (mg/L) |
|__________________________________________|______________________________________|
| | |
| Arsenic (As) | 5.0 |
|__________________________________________|______________________________________|
| | |
| Barium (Ba) | 100 |
|__________________________________________|______________________________________|
| | |
| Boron (B) | 500 |
|__________________________________________|______________________________________|
| | |
| Cadmium (Cd) | 0.5 |
|__________________________________________|______________________________________|
| | |
| Chromium (Cr) | 5.0 |
|__________________________________________|______________________________________|
| | |
| Total fluorides | 150 |
|__________________________________________|______________________________________|
| | |
| Mercury (Hg) | 0.1 |
|__________________________________________|______________________________________|
| | |
| Nitrates + nitrites (N-NO3+N-NO2) | 1,000 |
|__________________________________________|______________________________________|
| | |
| Nitrites (N-NO2) | 100 |
|__________________________________________|______________________________________|
| | |
| Lead (Pb) | 5.0 |
|__________________________________________|______________________________________|
| | |
| Selenium (Se) | 1.0 |
|__________________________________________|______________________________________|
| | |
| Uranium (U) | 2.0 |
|__________________________________________|______________________________________|
(b) mine tailings that produce leachate emitting ionizing radiations (S) and for which the result of the following equation is greater than 0.05, but equal to or less than 1;
where
C = activity concentration for each radioelement present in a kilogram of mine tailings, expressed in kilobecquerels per litre (kBq/L)
A = maximum activity concentration mentioned in Schedule 1 to the Regulation respecting hazardous materials for each radioelement present in a kilogram of mine tailings, expressed in kilobecquerels per litre (kBq/L)
n = radioelement present in a kilogram of mine tailings;
(c) mine tailings that contain more than 5 ug/kg of polychlorinated dibenzofurans or polychlorinated dibenzo [b, e] [1,4] dioxins, as calculated according to the international toxicity equivalency factors provided for in Schedule 2 to the Regulation respecting hazardous materials.