Section 24-249. Testing before granting or renewing of operating certificates; testing before granting of tunneling permits

(a) Before a  tunneling permit is  granted  or  before  an  operating  certificate  is
  granted  or  renewed,  the  commissioner  may  require  the applicant to
  conduct such tests as are necessary in the opinion of  the  commissioner
  to  determine the sound level emitted from a device or an activity or to
  determine whether  the  device  or  its  operation  or  an  activity  is
  contributing to, or is in violation of this code. The test shall be made
  at the expense of the applicant.
    (b)  Such  test shall be conducted, reviewed and certified as provided
  by subdivision (b) of section 24-206 of this code. The  applicant  shall
  notify  the  department  of  the time and place of a test as provided by
  subdivision (c) of section 24-206 of this  code.  Reasonable  facilities
  shall be made available for the department to witness the test.
    If  in  the  opinion  of  the commissioner tests by the department are
  necessary, the facilities for  such  tests,  exclusive  of  sound  level
  meters,  shall be furnished by and at the expense of the owner or lessee
  or his or her agent as provided by subdivision (d) of section 24-206  of
  this code.