A program of periodic monitoring of leachate quality and
volume, leak detection system (LDS) fluid quality, volume and flow rate, and
leachate treatment residue composition and generation rate must be conducted at
all facilities which have a leachate collection and/or detection system. A
sampling and analytical workplan must be submitted for Department review and
approval. The sampling and analytical workplan for leachate treatment residue
characterization must meet the requirements of section
6. The Department-approved sampling
and analytical workplan must be part of the operation manual for the facility,
and must include all proposed monitoring points. Sampling schedule, methods of
sample collection and preservation, analyses to be performed, quality
assurance/quality control, analytical and statistical methods and reporting
format must be specified. At a minimum, the following must be incorporated into
the monitoring plan:
The parameter list for leachate and LDS fluid monitoring is
found in Appendix A of this chapter.
A. Sampling points should be located as close
as possible to the generation point;
B. Sampling points in primary and secondary
leachate collection systems and LDSs should be adequate to sample liquids
beneath each leachate collection area, landfill cell, and the leachate holding
facility;
C. Leachate and LDS fluid
generation rates must be reported in gallons per acre per day, using total
daily flow recording;
D. Leachate
and LDS fluid must initially be characterized through the sampling and analysis
of four or more independent samples of the leachate and LDS fluid for the
Column 3 parameters less any parameters it can be demonstrated are not present
in the wastes accepted at the landfill. Operators of existing landfills with a
leachate monitoring plan approved by the Department and consistent with the
requirements of the 1989 solid waste rules are not required to perform an
initial characterization of leachate and LDS fluid provided the wastes
currently accepted are chemically consistent with wastes previously
accepted;
E. Detection monitoring
for leachate must be for the same parameters and at the same frequency as
approved for the ground water detection monitoring program, except that
leachate must be monitored for the Column 2 parameters on an annual basis, and
the results reported in the landfill's annual report, unless the owner/operator
can certify that no changes in the wastes delivered to the solid waste facility
have occurred;
F. Parameters
consistently undetected in a facility's leachate, or in results from its ground
water monitoring network, may be deleted from the leachate monitoring program
upon approval by the Department. The following major ions and complex ions may
not be deleted from a leachate monitoring program: sodium, potassium,
magnesium, calcium, iron, ammonia, bicarbonate, sulfate, chloride and
nitrate;
G. Unless otherwise
approved by the Department based on site-specific characteristics, or required
by the landfill's Response Action Plan, sampling, analysis, and reporting
requirements for LDS fluid must be as follows:
(1) Sampling and reporting of the field
parameters of Column 1 must be conducted monthly, and reported with leachate
and water quality information.
(2)
Detection monitoring for other than field parameters must be for the same
parameters and at the same frequency as approved for the ground water detection
monitoring program, except that LDS fluid must be monitored for the Column 2
parameters on an annual basis, and the results reported in the landfill's
annual report; and
H.
Leachate residues generated by on-site treatment or settlement must be analyzed
prior to disposal.
