# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 20: Additional criteria for acceptance of waste at landfills for hazardous waste


(1) The following criteria apply to granular waste to be accepted at a landfill for hazardous waste—
(a) the leaching limit values set out in Table 1,
(b) the additional criteria set out in Table 2, and
(c) the waste must have a load bearing capacity of at least 50kPa.
(2) Subject to sub-paragraph (3), the following criteria applies to monolithic hazardous waste to be accepted at a landfill—
(a) the limit values set out in Table 3,
(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 meets the following limit values—
(a) loss of ignition of 10%, or
(b) total organic carbon of 6%.
Table 1
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 1,000 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
25
Barium
Ba
300
Cadmium
Cd
5
Total chromium
Cr total
70
Copper
Cu
100
Mercury
Hg
2
Molybdenum
Mo
30
Nickel
Ni
40
Lead
Pb
50
Antimony
Sb
5
Selenium
Se
7
Zinc
Zn
200
Chloride
Cl-
25 000
Fluoride
F-
500
Sulphate
SO42-
50 000
Phenol index
Pl
1
Dissolved Organic Carbon
DOC
1000
Total dissolved solids
TDS
100 000
Table 2
Parameter
Values
(1)Either Loss on Ignition (LOI) or Total Organic Carbon (TOC) must be used.
(2)If this value for TOC is not achieved, a higher limit value may be permitted by SEPA provided that the Dissolved Organic Carbon (DOC) value of 1,000 mg/kg is achieved at L/S = 10 l/kg at its own pH or a pH value of between 7.5 and 8.0.
Loss on Ignition (LOI)
10%
Total organic carbon (TOC)
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 3
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
20
Barium
Ba
150
Cadmium
Cd
1
Total chromium
Cr total
25
Copper
Cu
60
Mercury
Hg
0.4
Molybdenum
Mo
20
Nickel
Ni
15
Lead
Pb
20
Antimony
Sb
2.5
Selenium
Se
5
Zinc
Zn
100
Chloride
Cl-
20 000
Fluoride
F-
200
Sulphate
SO42-
20 000
Dissolved Organic Carbon
DOC
Must be evaluated

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/13/paragraph/20 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-13/paragraph-20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.