Unless otherwise specified in an applicable requirement or in a term or condition of the operating permit for the subject air contamination source, a person who is required by the department to submit a stack test report shall notify the department, in writing, not less than 30 days prior to the test, of the time and date of the test. Such notification shall also include the acceptable procedures to be used to stack test including sampling and analytical procedures. Such person shall allow a representative of the department, free access to observe stack testing being conducted by such person.