(1) The following sites shall test their finished compost in compliance with the US Composting Council's Seal of Testing Assurance, unless the department has approved an alternate procedure:

    (a) Class 1 composting facilities that produce over 2,000 cubic yards of finished compost per year. The finished compost shall be analyzed for the parameters listed in section 11565.

    (b) Class 2 composting facilities. The finished compost shall be analyzed for the parameters listed in section 11565 and, if the compost is produced from class 2 compostable material, other parameters identified in the facility's general permit.

    (2) All sites not listed in subsection (1) shall test at least 1 sample of finished compost per 4,000 cubic yards or 2,000 tons per year for the parameters listed in section 11565, unless the department has approved an alternate procedure.