PRC §3964: No placer mining operator shall mine by the placer process on any stream or on the watershed of any stream tributary directly or indirectly to the Sacramento River or the San Joaquin River without tak

No placer mining operator shall mine by the placer process on any stream or on the watershed of any stream tributary directly or indirectly to the Sacramento River or the San Joaquin River without taking both of the following precautions to prevent pollution of the stream by the effluent from his or her operations: (a) Constructing a settling pond or ponds of sufficient size to permit the clarification of water used in the mining processes before the water is discharged into the stream. (b) Mixing with the effluent from mining operations aluminum sulphate and lime, or an equivalent clarifying substance which will cause the solid material in the effluent to coagulate and thus avoid rendering the water in the stream unfit for domestic water supply purposes.