b) A test plan must be submitted to the Agency for review prior to conducting any emissions test when any one of the following applies:

1. 1) The Agency makes a written request for a test plan;
2. 2) A non-standard test method or procedure is to be used;
3. 3) A source seeks to test at operating parameters that differ from the maximum parameters specified in its operating permit;
4. 4) A source seeks to deviate from a prior test plan for that emission unit; or
5. 5) A test plan for the emission unit is required to be submitted by an Illinois Pollution Control Board Order, any court order, consent decree, Compliance Commitment Agreement, or permit provision.

c) A test plan must specify:

1. 1) The purpose of the test;
2. 2) The operating parameters;
3. 3) The test methods; and
4. 4) Any other procedures that will be followed when conducting an emissions test pursuant to the provisions of this Part.

d) Notwithstanding subsections (a), (b), and (c) above, a test plan need not be submitted under the following circumstances:

1. 1) Where the source intends to utilize a test plan previously submitted to the Agency. However, the source must submit a notice containing the following:

   1. A) The purpose of the test;
   2. B) Date the previously submitted test plan was submitted to the Agency; and
   3. C) A statement that the source is relying on a previously submitted test plan.

2. 2) Where the source intends to use a standard test method or procedure. However, the source must submit a notice containing the following:

   1. A) The purpose of the test; and
   2. B) The standard test method or procedure to be used.