Testing and Performance Criteria for Stabilized/Solidified Waste Forms - Stabilization and Solidification of Hazardous, Radioactive, and Mixed Wastes - page 300

TABLE 11.6
Leaching Limit Values for the Acceptance of Granular Wastes in Landfills 113

Hazardous Waste to
Hazardous Waste Sites
(set 1)

Hazardous Waste to
Non-Hazardous Waste Sites
(set 2)

Inert Waste Sites
(set 3)

L/S = 2 l/kg L/S = 10 l/kg L/S = 2 l/kg L/S = 10 l/kg L/S = 2 l/kg L/S = 10 l/kg

Components mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

As 6 25 0.4 2 0.1 0.5

Ba 100 300 30 100 7 20

Cd 0.6 1 0.06 0.1 0.03 0.04

Cr total 25 70 4 10 0.2 0.5

Cu 50 100 25 50 0.9 2

Hg 0.1 0.4 0.005 0.02 0.003 0.01

Mo 20 30 5 10 0.3 0.5

Ni 20 40 5 10 0.2 0.4

Pb 25 50 5 10 0.2 0.5

Sb 2 5 0.2 0.7 0.02 0.06

Se 4 7 0.3 0.5 0.06 0.1

Zn 90 200 25 50 2 4

Cl 17,000 25,000 10,000 15,000 550 800

F 200 500 60 150 4 10

SO 4 25,000 50,000 10,000 20,000 560 # 1,000 #

TDS * 70,000 100,000 40,000 60,000 2,500 4,000

DOC ** 480 1,000 380 800 240 500

Phenol index - - - - 0.47 1

* The values for Total Dissolved Solids (TDS) can be used alternatively to the values of Sulfate, Fluoride,
and Chloride.
**If the waste does not meet these values for dissolved organic carbon (DOC) at its own pH, it may
alternatively be tested at L/S = 10 l/kg and a pH of 7.5 to 8.0. The waste may be considered as complying
with the acceptance criteria for DOC, if the result of this determination does not exceed 1000, 800, and
500 mg/kg for sets 1, 2, and 3 respectively (a draft method based on prEN 14429 is available).
# If the waste does not meet these values for sulfate, it may still be considered as complying with the
acceptance criteria if the leaching does not exceed either of the following values: 1500 mg/L as Co at
L/S = 0.1 l/kg and 6000 mg/kg at L/S = 10 l/kg. It will be necessary to use the percolation test (prEN
14405) to determine the limit value at L/S 0.1 l/kg under initial equilibrium conditions, whereas the
value at L/S = 10 l/kg may be determined either by a batch leaching test (BS EN 12457: Part 2 or BS
EN 12457: Part 3) or by the percolation test (prEN 14405) under conditions approaching local equilib-
rium.
Note: For inorganic parameters of concern not listed in the table, the maximum leachable value obtained
from the percolation test (prEN 14405) can be used as the source term for those parameters in the risk
assessment outlined in Schedule 1 (1) of the 2002 Regulations.

For radioactive wastes, the ANSI/ANS-16.1-2003 (see Section 11.2.3.1.2) is the
regulatory test procedure used worldwide, although other tests have been used. The
U.S. Nuclear Regulatory Commission (NRC) topical position paper 127 specifies a
leachability index of at least 6 (units of cm 2 /s for the effective diffusion coefficient)