12. Exceptions for noise: A new pit or quarry may nevertheless be established at a distance that is under the distances prescribed in sections 10 and 11 if the operator submits in support of his application an estimate of the maximum noise level that will be emitted into the environment by the operation of the new pit or quarry and if the noise measured at the boundary of the residential, commercial or mixed zone referred to in section 10 and at any structure or immovable referred to in section 11 does not exceed 40 dBA between 6:00 p.m. and 6:00 a.m. and 45 dBA between 6:00 a.m. and 6:00 p.m.
In a case where the Minister granted a certificate of authorization for a pit or quarry following an application supported by a noise level estimate in accordance with this section, the operator of the pit or quarry must, during the entire operation, comply with the noise standards established in the first paragraph.
R.R.Q., 1981, c. Q-2, r. 2, s. 12.