(a) There shall be no distinctly visible increase in turbidity of receiving waters attributable to discharges or instream activities.
(b)
(1) The values below should not be exceeded during base flow (June 1 through October 31) in more than twenty percent (20%) of samples.
(2) The values below should not be exceeded during storm flows in more than twenty-five percent (25%) of samples taken in no less than twenty-four (24) monthly samples.