§ 1750-230. PERMITTED PRETREATMENT

A wastewater pretreatment system or device may be required by the Director to treat flow prior to discharge to the sewer when it is necessary to restrict or prevent the discharge to the sewer of certain waste constituents not in compliance with 1750-050, "prohibited polluted discharges," to distribute more equally over a longer time period any peak discharges of wastewaters or to accomplish any pretreatment result required by the Director, such that, in conjunction with treatment at the POTW, the system operates within the requirements of the NPDES permit.

(a)

All pretreatment systems or devices shall be approved and permitted by the Director; but such approval shall not absolve the discharger of the responsibility of meeting any effluent limitation required by the Director. All pretreatment systems judged by the Director to require engineering design shall have plans prepared and signed by an engineer of suitable discipline licensed in the State of California.

(b)

Normally, a gravity separation interceptor, equalizing tank, neutralization chamber and control manhole will be required, respectively, to remove prohibited settleable and floatable solids, to equalize wastewater streams varying greatly in quantity and/or quality, to neutralize low or high pH flow and to facilitate inspection, flow measurement and sampling.