1. (1) Adequate records shall be kept by the discharger of the operation of each facility which discharges waste effluents to basin waters, as required by the member pollution control agencies, or as may be required by the commission.

2. (2) Such records shall be made available to the commission upon request of the executive director.

   (b) Sampling facilities.

   Facilities, subject to commission approval, shall be provided for each discharge so that representative samples may be readily collected under safe conditions.

   (c) Sampling.

3. (1) Samples shall be taken by the discharger in such manner and in such number as shall be determined by the commission upon consideration of the volume, location, and characteristics of the wastes, sufficient to permit the commission to determine the quality of waste treatment influents and effluents and evaluate in-plant reductions.

4. (2) Samples may be composited, continuously or hourly, in proportion to flow over 24 hours, or over a working cycle, as appropriate.

   (d) Bioassays.

   The commission may require bioassays to demonstrate that waste discharges are neither toxic nor harmful and will not taint fish or shellfish flesh beyond the mixing zone.

   (e) Analysis procedures.

5. (1) Samples shall be analyzed and bioassays performed in accordance with the procedures in the latest edition of Standard Methods for the Examination of Water and Wastewater, or as prescribed by the commission.

6. (2) In the analysis of oil and grease samples from oil storage terminal runoff the liquid-liquid extraction with trichlorotrifluoro-ethane gravimetric method shall be used.

   (f) Access.

   The commission, its officers, agents and employees shall have access to observe and inspect waste treatment and in-plant control facilities and to collect samples for analyses.

(a) Records.