122. Leachate sampling pursuant to section 105 may be reduced to a frequency of 3 samples per year, in spring, summer and fall if, after a monitoring period of a minimum duration of 3 consecutive years after the landfill site closure date, none of the parameters analyzed in the leachate samplings has exceeded the limit values set out in section 104. The monitoring frequency of all the parameters must be increased to once a month if there is non-compliance for a parameter.
In the case of leachate discharged into a sewer system or treated with the mill’s process water or that undergo treatment before being discharged into the environment or into a storm sewer, the operator must, after the permanent closure of the landfill site, measure leachate twice a year, in June and October. The parameters to be analyzed are those in section 104.
During the 12-month period following the permanent closure of the landfill site, the operator must install biogas measurement stations in the landfilled residual materials if no such stations have been installed. They must be laid out evenly over the entire landfill area. The operator must measure twice a year, in June and October, in each measurement station, the methane concentration contained in the biogas produced by landfilled residual materials. Measurement of the methane concentration is taken on site using a device designed for that purpose.
The operator must send the results of the measurements prescribed in this section to the Minister, including the result of any additional measurement taken in accordance with section 105, within 30 days following the last day of each month in which measurements were taken.
The results, and the reasons for excess or missing data, must be sent to the Minister using media-based information technology conforming to the standard format provided by the Minister that contains the information required by Schedules X and XVII.
O.C. 808-2007, s. 122; O.C. 675-2013, s. 10.