[Code of Federal Regulations]
[Title 40, Volume 24]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR264.303]

[Page 346]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 264_STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, 
STORAGE, AND DISPOSAL FACILITIES--Table of Contents
 
                           Subpart N_Landfills
 
Sec. 264.303  Monitoring and inspection.

    (a) During construction or installation, liners (except in the case 
of existing portions of landfills exempt from Sec. 264.301(a)) and 
cover systems (e.g., membranes, sheets, or coatings) must be inspected 
for uniformity, damage, and imperfections (e.g., holes, cracks, thin 
spots, or foreign materials). Immediately after construction or 
installation:
    (1) Synthetic liners and covers must be inspected to ensure tight 
seams and joints and the absence of tears, punctures, or blisters; and
    (2) Soil-based and admixed liners and covers must be inspected for 
imperfections including lenses, cracks, channels, root holes, or other 
structural non-uniformities that may cause an increase in the 
permeability of the liner or cover.
    (b) While a landfill is in operation, it must be inspected weekly 
and after storms to detect evidence of any of the following:
    (1) Deterioration, malfunctions, or improper operation of run-on and 
run-off control systems;
    (2) Proper functioning of wind dispersal control systems, where 
present; and
    (3) The presence of leachate in and proper functioning of leachate 
collection and removal systems, where present.
    (c)(1) An owner or operator required to have a leak detection system 
under Sec. 264.301(c) or (d) must record the amount of liquids removed 
from each leak detection system sump at least once each week during the 
active life and closure period.
    (2) After the final cover is installed, the amount of liquids 
removed from each leak detection system sump must be recorded at least 
monthly. If the liquid level in the sump stays below the pump operating 
level for two consecutive months, the amount of liquids in the sumps 
must be recorded at least quarterly. If the liquid level in the sump 
stays below the pump operating level for two consecutive quarters, the 
amount of liquids in the sumps must be recorded at least semi-annually. 
If at any time during the post-closure care period the pump operating 
level is exceeded at units on quarterly or semi-annual recording 
schedules, the owner or operator must return to monthly recording of 
amounts of liquids removed from each sump until the liquid level again 
stays below the pump operating level for two consecutive months.
    (3) ``Pump operating level'' is a liquid level proposed by the owner 
or operator and approved by the Regional Administrator based on pump 
activation level, sump dimensions, and level that avoids backup into the 
drainage layer and minimizes head in the sump.

[47 FR 32365, July 26, 1982, as amended at 50 FR 28748, July 15, 1985; 
57 FR 3490, Jan. 29, 1992]