1. (a)

   1. (1) Septic tank effluent when applied to the soil causes a clogging layer (biomat) to form.
   2. (2) The biomat, while increasing treatment performance, reduces the infiltrative capacity of the soil.
   3. (3) Septic tank effluent is considered high strength if the waste stream possesses an individual parameter outside of the levels established for residential strength wastewater (see definitions).

   4. (4) The designated representative shall indicate the:

      1. (A) Assumed strength of the wastewater entering the system; and
      2. (B) Effluent values that the intended design is to achieve.
   5. (5) Soil loading rate charts (Appendix A/Table 1) do not take into consideration the organic loading to the soil.
   6. (6) Loading rates found in Appendix A/Table 1 can only be used when the wastewater strength has been reduced to residential strength levels.

2. (b)

   1. (1) Establishments or structures producing high levels of grease and oils, or high TSS or high BOD5 shall reduce wastewater strength prior to disposal.
   2. (2) High-strength effluent-reducing systems shall be monitored by licensed certified monitoring personnel.
   3. (3) The Department of Health may request sampling to verify wastewater parameters are met.

3. (c)

   1. (1) Design daily flow adjustments may be granted for RV parks engineered with wastewater strength reduction.
   2. (2) Any design daily flow adjustment shall be accompanied by proposed treatment documentation.
   3. (3) Sampled or projected wastewater characteristics are to be included with requests for design flow adjustments.
   4. (4) The flow per space shall not be less than sixty (60) gallons per day per space for RV parks with sewer and water at each site.

Codification Notes: “BOD5” means biochemical oxygen demand. "RV" means recreational vehicle. "TSS" means total suspended solids.