Code of Maine Rules › 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL › Chapter 405 - Solid Waste Management Rules: Water Quality Monitoring, Leachate Monitoring, and Waste Characterization › Section 096-405-4 - Leachate, Leachate Collection, Leachate Detection System And Leachate Treatment Residue Monitoring

Current through 2024-29, July 17, 2024
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