# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 22: Criteria for granular stable non-reactive hazardous waste deposited in a cell on its own and granular stable non-reactive hazardous waste and non-hazardous waste deposited in the same cell


(1) The following criteria apply to granular, stable, non-reactive hazardous waste and to granular non-hazardous waste which is landfilled in the same cell with such waste—
(a) the limit values set out in Table 4,
(b) the additional criteria set out in Table 5, and
(c) the waste must have the load bearing capacity of at least 50kPa.
(2) Subject to sub-paragraph (3), the following criteria apply to monolithic stable, non-reactive hazardous waste and to monolithic non-hazardous waste which is landfilled in the same cell with such waste—
(a) the limit values set out in Table 6,
(b) the additional criteria set out in Table 7,
(c) the waste must have a load bearing capacity of at least 1.5MPa, and
(d) the monolith must be at least 40 cm in any direction or have a fracture spacing of at least 40 cm.
(3) Where waste is subject to treatment to render it monolithic, the waste must only be accepted at a landfill if, prior to such treatment, the waste met the following limit values—
(a) loss of ignition of 10%, or
(b) total organic carbon of 6%.
Table 4
Component
Symbol
L/S = 10 1/kg>
(1)SEPA may include conditions in a permit authorising limit values for specific parameters (other than dissolved organic carbon) up to three times higher for specified waste accepted in a landfill taking into account the characteristics of the landfill and its surroundings and provided a risk assessment demonstrates that emissions (including leachate) from the landfill will present no additional risk to the environment.
(2)If the waste does not meet this value for Dissolved Organic Carbon (DOC) at its own pH, it may alternatively be tested at L/S = 10 l/kg and a pH of between 7.5 and 8.0. The waste may be considered as complying with the acceptance criteria for DOC if the result of this determination does not exceed 800 mg/kg.
(3)The values for TDS (Total Dissolved Solids) can be used alternatively to the values for Sulphate and Chloride.
mg/kg dry substance
Arsenic
As
2
Barium
Ba
100
Cadmium
Cd
1
Total Chromium
Cr total
10
Copper
Cu
50
Mercury
Hg
0.2
Molybdenum
Mo
10
Nickel
Ni
10
Lead
Pb
10
Antimony
Sb
0.7
Selenium
Se
0.7
Zinc
Zn
50
Chloride
Cl-
15 000
Fluoride
F-
150
Sulphate
SO42-
20 000
Dissolved organic Carbon
DOC
800
Total dissolved solids
TDS
60 000
Table 5
Parameter
Value
(1)If this value is not achieved, a higher limit value may be permitted by SEPA, provided that the Dissolved Organic Carbon (DOC) value of 800 mg/kg is achieved at L/S = 10 l/kg, either at the material’s own pH or at a pH value between 7.5 and 8.0.
Total organic carbon (TOC)
5%
pH
Minimum 6
Acid neutralisation capacity (ANC)
Must be evaluated between the pH of the waste in question, pH6 and the pH of the site leachate.
Table 6
Component
Symbol
Mg/m2
(1)These limit values apply to tests using the 64-day tank test (NEN 7345) necessary for characterisation of the waste. Where it is appropriate for compliance testing, SEPA may specify use of a shortened version of the test comprising only the first four steps, and in such cases, the limit values will be a quarter of the values in the table.
Arsenic
As
1.3
Barium
Ba
45
Cadmium
Cd
0.2
Total Chromium
Cr total
5
Copper
Cu
45
Mercury
Hg
0.1
Molybdenum
Mo
7
Nickel
Ni
6
Lead
Pb
6
Antimony
Sb
0.3
Selenium
Se
0.4
Zinc
Zn
30
Chloride
Cl-
10 000
Fluoride
F-
60
Sulphate
SO42-
10 000
Dissolved Organic Carbon
DOC
Must be evaluated
Table 7
Parameter
Value
pH
Must be evaluated
Electrical conductivity (mScm-1m-2)
Must be evaluated
Acid Neutralisation Capacity (ANC)
Must be evaluated

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/13/paragraph/22 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-13/paragraph-22
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.