[Code of Federal Regulations]
[Title 40, Volume 21]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR258.40]

[Page 400-401]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
                   CHAPTER I--ENVIRONMENTAL PROTECTION
                           AGENCY (CONTINUED)
 
PART 258--CRITERIA FOR MUNICIPAL SOLID WASTE LANDFILLS--Table of Contents
 
                       Subpart D--Design Criteria
 
Sec. 258.40  Design criteria.


    (a) New MSWLF units and lateral expansions shall be constructed:
    (1) In accordance with a design approved by the Director of an 
approved State or as specified in Sec. 258.40(e) for unapproved States. 
The design must ensure that the concentration values listed in Table 1 
of this section will not be exceeded in the uppermost aquifer at the 
relevant point of compliance, as specified by the Director of an 
approved State under paragraph (d) of this section, or
    (2) With a composite liner, as defined in paragraph (b) of this 
section and a leachate collection system that is designed and 
constructed to maintain less than a 30-cm depth of leachate over the 
liner.
    (b) For purposes of this section, composite liner means a system 
consisting of two components; the upper component must consist of a 
minimum 30-mil flexible membrane liner (FML), and the lower component 
must consist of at least a two-foot layer of compacted soil with a 
hydraulic conductivity of no more than 1x10-7 cm/sec. FML 
components consisting of high density polyethylene (HDPE) shall be at 
least 60-mil thick. The FML component must be installed in direct and 
uniform contact with the compacted soil component.
    (c) When approving a design that complies with paragraph (a)(1) of 
this section, the Director of an approved State shall consider at least 
the following factors:
    (1) The hydrogeologic characteristics of the facility and 
surrounding land;
    (2) The climatic factors of the area; and
    (3) The volume and physical and chemical characteristics of the 
leachate.
    (d) The relevant point of compliance specified by the Director of an 
approved State shall be no more than 150 meters from the waste 
management unit boundary and shall be located on land owned by the owner 
of the

[[Page 401]]

MSWLF unit. In determining the relevant point of compliance State 
Director shall consider at least the following factors:
    (1) The hydrogeologic characteristics of the facility and 
surrounding land;
    (2) The volume and physical and chemical characteristics of the 
leachate;
    (3) The quantity, quality, and direction, of flow of ground water;
    (4) The proximity and withdrawal rate of the ground-water users;
    (5) The availability of alternative drinking water supplies;
    (6) The existing quality of the ground water, including other 
sources of contamination and their cumulative impacts on the ground 
water, and whether the ground water is currently used or reasonably 
expected to be used for drinking water;
    (7) Public health, safety, and welfare effects; and
    (8) Practicable capability of the owner or operator.
    (e) If EPA does not promulgate a rule establishing the procedures 
and requirements for State compliance with RCRA section 4005(c)(1)(B) by 
October 9, 1993, owners and operators in unapproved States may utilize a 
design meeting the performance standard in Sec. 258.40(a)(1) if the 
following conditions are met:
    (1) The State determines the design meets the performance standard 
in Sec. 258.40(a)(1);
    (2) The State petitions EPA to review its determination; and
    (3) EPA approves the State determination or does not disapprove the 
determination within 30 days.

    Note to subpart D: 40 CFR part 239 is reserved to establish the 
procedures and requirements for State compliance with RCRA section 
4005(c)(1)(B).

                                 Table 1
------------------------------------------------------------------------
                                                                MCL (mg/
                           Chemical                                l)
------------------------------------------------------------------------
Arsenic.......................................................   0.05
Barium........................................................   1.0
Benzene.......................................................   0.005
Cadmium.......................................................   0.01
Carbon tetrachloride..........................................   0.005
Chromium (hexavalent).........................................   0.05
2,4-Dichlorophenoxy acetic acid...............................   0.1
1,4-Dichlorobenzene...........................................   0.075
1,2-Dichloroethane............................................   0.005
1,1-Dichloroethylene..........................................   0.007
Endrin........................................................   0.0002
Fluoride......................................................   4
Lindane.......................................................   0.004
Lead..........................................................   0.05
Mercury.......................................................   0.002
Methoxychlor..................................................   0.1
Nitrate.......................................................  10
Selenium......................................................   0.01
Silver........................................................   0.05
Toxaphene.....................................................   0.005
1,1,1-Trichloromethane........................................   0.2
Trichloroethylene.............................................   0.005
2,4,5-Trichlorophenoxy acetic acid............................   0.01
Vinyl Chloride................................................   0.002
------------------------------------------------------------------------