1. (a) Has been coagulated and passed through natural undisturbed soils or a bed of filter media pursuant to the following:

   1. (1) At a rate that does not exceed 5 gallons per minute per square foot of surface area in mono, dual or mixed media gravity, upflow or pressure filtration systems, or does not exceed 2 gallons per minute per square foot of surface area in traveling bridge automatic backwash filters; and

2. (2) So that the turbidity of the filtered wastewater does not exceed any of the following:

   1. (A) An average of 2 NTU within a 24-hour period;
   2. (B) 5 NTU more than 5 percent of the time within a 24-hour period; and
   3. (C) 10 NTU at any time.

3. (b) Has been passed through a microfiltration, ultrafiltration, nanofiltration, or reverse osmosis membrane so that the turbidity of the filtered wastewater does not exceed any of the following:

   1. (1) 0.2 NTU more than 5 percent of the time within a 24-hour period; and
   2. (2) 0.5 NTU at any time.

“Filtered wastewater” means an oxidized wastewater that meets the criteria in subsection (a) or (b):

Note: Authority cited: Section 13521, Water Code. Reference: Sections 13520 and 13521, Water Code.

History

1. New section filed 11-2-2000; operative 12-2-2000 (Register 2000, No. 44).