[Code of Federal Regulations]

[Title 40, Volume 24]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR258.40]



[Page 408-409]

 

                   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 com ponent.

    (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 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



[[Page 409]]





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

------------------------------------------------------------------------