Leachate recirculation monitoring

Leachate recirculation monitoring. Leachate recirculation monitoring. The owner or operator of a solid waste facility that recirculates leachate shall sample for, maintain records of, and report to the department all of the following, in accordance with ch. NR 507 Appendix I , Table 4A: (1) Liquid mass balance. The volumes of leachate extracted from each leachate drainage basin, the volumes of leachate recirculated into each leachate drainage basin and monthly precipitation records from on-site instrumentation or the nearest national weather system station. (2) Leachate head. The monthly level of leachate head on the liner in each leachate drainage basin where recirculation has been implemented. (3) Leachate characteristics. Samples of leachate shall be taken quarterly from the sump or leachate collection tanks. Those samples shall be tested semiannually for a VOC scan and quarterly for the following parameters: (a) BOD. (c) Ammonia-nitrogen. (d) Field pH. (e) Field specific conductance. (f) Alkalinity. (g) Hardness. (4) Landfill gas. (a) The monthly total volume of gas extracted from each leachate drainage basin. Gas volumes shall be recorded for a period of at least 3 years beyond the termination of leachate recirculation. (b) An annual assessment of the liquid level in each gas extraction well.