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Table 1.3 Natural and Artificial Containment Features for Mining Units

27 CA ADC Div. 2 Subd. 1 Ch. 7 Subch. 1 Art. 1 Tbl. 1.3Barclays Official California Code of Regulations

Barclays California Code of Regulations
Title 27. Environmental Protection
Division 2. Solid Waste (Refs & Annos)
Subdivision 1. Consolidated Regulations for Treatment, Storage, Processing or Disposal of Solid Waste
Chapter 7. Special Treatment, Storage, and Disposal Units
Subchapter 1. Mining Waste Management
Article 1. SWRCB--Mining Waste Management Regulations (C15: Article 7) (Refs & Annos)
27 CCR Div. 2 Subd. 1 Ch. 7 Subch. 1 Art. 1 Tbl. 1.3
Table 1.3 Natural and Artificial Containment Features for Mining Units
Waste Group
Waste Management Unit
Geologic Setting
Liner(s) Hydr. Cond. Values (Units: cm/sec)
Leachate Collection and Removal System
A
Waste Pile
per § 2531(b)(1) of Title 23, OR single clay liner1 <1x10-7
required
Surface Impoundment or Tailings Pond
not applicable
double liner, both <1x10-7 outer: clay; Inner: clay or synthetic
required(2)
B
Waste Pile
per § 20250(b)(1) OR single clay liner
<1x10-6 (1)
required
Surface Impoundment or Tailings Pond
not applicable
double liner, both <1x10-6 // outer: clay or natural permeability(3); inner: clay or synthetic
OR
single replaceable clay liner(4)
required(2)
C
Waste Pile, Surface Impoundment, or Tailings Pond
not applicable
not applicable
not applicable
(1) Synthetic liner may be used for short-term containment [see § 22490(f)(1)].
(2) Liner and leachate collection and removal system for tailings pond must be able to withstand the ultimate weight of wastes.
(3) Permeability of <1x10-6 cm/sec or natural geologic materials may replace outer liner of double liner system.
(4) Single clay liner <(1x10-6 cm/sec) for surface impoundment, to be removed before last 25 percent (minimum 1 foot thickness) of liner is penetrated by fluid, including waste and leachate.
This database is current through 4/12/24 Register 2024, No. 15.
Cal. Admin. Code tit. 27, Div. 2 Subd. 1 Ch. 7 Subch. 1 Art. 1 Tbl. 1.3, 27 CA ADC Div. 2 Subd. 1 Ch. 7 Subch. 1 Art. 1 Tbl. 1.3
End of Document