(a) For the purpose of calculating wastewater service charges, the minimum standard classification charge shall be based upon the average strength of domestic wastewater, and for this purpose the average strength of domestic wastewater is hereby defined as containing not more than the following:

Three hundred mg/l suspended solids (SS);

Four hundred mg/l chemical oxygen demand (COD);

Three hundred mg/l biochemical oxygen demand (BOD);

Fifty mg/l oil and grease (O&G) (animal or vegetable origin);

Ten mg/l phosphorus (P);

Thirty mg/l Kjeldahl nitrogen;

Seven hundred mg/l total solids (TS);

Additional elements of wastewater strength as may be deemed necessary by the Director.

(b) Any person desiring to discharge wastewater to the City sewage collection system having a concentration greater than 300 mg/l suspended solids or 300 mg/l biochemical oxygen demand shall receive written permission from the Director before allowing such discharge. (Ord. 19496 § 91, 12-21-10; Ord. 18272 § 9, 6-22-04. Code 1995 § 146-343. Formerly 14.80.790.)