SCHEDULE 10Landfill

Interpretation of the Decision Annex for the exercise of relevant functions: additional acceptance criteria in relating to monolithic waste

9.

When interpreting the Decision Annex for the purposes of paragraph 5(3)—

(a)

point 2.3.1 is to be read as if, in addition to the criteria listed, it requires the satisfaction of the following criteria in relation to stable, non-reactive monolithic hazardous waste and non-hazardous waste which is to be landfilled in the same cell with such waste—

(i)

it meets either—

(aa)

the limit values for leaching set out in the table in point 2.3.1, or

(bb)

the limit values for leaching set out in the following table—

Component

Symbol

mg/m2

Arsenic

As

1.3

Barium

Ba

45

Cadmium

Cd

0.2

Total Chromium

Crtotal

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

(ii)

it meets the additional criteria set out in the following table—

Parameter

Value

pH of the eluate from the monolith or crushed monolith

Must be evaluated

Electrical conductivity (μ S.cm-1m-2) of the eluate from the monolith or crushed monolith

Must be evaluated

Acid Neutralisation Capacity (ANC) of the crushed monolith

Must be evaluated

(iii)

it has a mean unconfined compressive strength of at least 1Mpa after 28 days curing;

(iv)

it has either—

(aa)

dimensions of greater than 40cm along each side, or

(bb)

a depth and fracture spacing when hardened of greater than 40cm; and

(v)

where the waste was subjected to treatment to render it monolithic, prior to such treatment it met the following limit values—

(aa)

loss on ignition of 10%, or

(bb)

total organic carbon of 6%;

(b)

point 2.4.1 in the Decision Annex is to be read as if, in addition to the criteria listed, it requires the satisfaction of the following criteria in relation to monolithic waste to be accepted at a landfill for hazardous waste—

(i)

it complies with paragraphs (a)(ii) to (a)(v), and

(ii)

it meets either—

(aa)

the limit values for leaching set out in the table in point 2.4.1, or

(bb)

the limit values for leaching set out in the following table—

Components

Symbol

mg/m2 1

Arsenic

As

20

Barium

Ba

150

Cadmium

Cd

1

Total Chromium

Crtotal

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

1 The regulator may include conditions in an environmental permit authorising limit values for specific parameters (other than Dissolved Organic Carbon) up to 3 times higher for specified wastes 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.