Section 096-405-4 - Leachate, Leachate Collection, Leachate Detection System And Leachate Treatment Residue MonitoringA 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; andH. Leachate residues generated by on-site treatment or settlement must be analyzed prior to disposal.06- 096 C.M.R. ch. 405, § 4