# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 26: Limit values for waste acceptable at landfills for inert waste


The following limit values apply to waste accepted at landfills for inert waste other than waste which may be accepted without testing under paragraph 25—
(a) the limit values for leaching set out in Table 9, and
(b) the limit values for total content of organic parameters set out in Table 10.
Table 9
Component
Symbol
L/S = 10 1/kg
(1)This limit value for sulphate may be increased to 6,000 mg/kg, provided that the value of CO (the first eluate of a percolation test at L/S = 0.1 l/kg) does not exceed 1,500 mg/l. It will be necessary to use a percolation test to determine the limit value at L/S = 0.1 l/kg under initial equilibrium conditions.
(2)If the waste does not meet this value for Dissolved Organic Carbon (DOC) at its own pH value, it may alternatively be tested at L/S = 10 l/kg and a pH 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 500 mg/kg.
(3)The value for Total Dissolved Solids can be used alternatively to the values for Sulphate and Chloride.
mg/kg dry substance
Arsenic
As
0.5
Barium
As
0.5
Cadmium
Cd
0.04
Total Chromium
Cr total
0.5
Copper
Cu
2
Mercury
Hg
0.01
Molybdenum
Mo
0.5
Nickel
Ni
0.4
Lead
Pb
0.5
Antimony
Sb
0.06
Selenium
Se
0.1
Zinc
Zn
4
Chloride
Cl-
800
Fluoride
F-
10
Sulphate
SO42-
1000
Phenol index
Pl
1
Dissolved organic carbon
DO
500
Total dissolved solids
TDS
4000
Table 10
Parameter
Value
(1)In the case of soils, a higher limit value may be permitted by SEPA, provided a Dissolved Organic Carbon value of 500 mg/kg is achieved at L/S 10 l/kg at the pH of the soil or at a pH value of between 7.5 and 8.0.
mg/kg
Total Organic Carbon (TOC)
30 000
BTEX compounds (benzene, toluene, ethyl benzene and xylenes)
6
Polychlorinated biphenyls (PCBs) (7 congeners)
1
Mineral oil (C10 to C40)
500
PAHs (polycyclic aromatic hydrocarbons)
100

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/13/paragraph/26 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-13/paragraph-26
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.