1. City of Oxnard operates the Oxnard WTP at 6001 South Perkins Road,
Oxnard, with a design capacity of 31.7 million gallons per day (MGD).
The plant discharges an average flow of 17.3 million gallons per day of
secondary-treated municipal wastewater to the Pacific Ocean, a navigable
water of the United States, at Ormond Beach, California.
2. Treated wastes are discharged to the Pacific Ocean through a 48-inch ocean outfall. The outfall line extends 5,950 feet offshore from Ormond Beach, including a 1,016-foot diffuser section, and discharges at a depth of about 50 feet below the ocean surface (Latitude 340 07' 34" N, Longitude 119o 11' 26" W).
1. The County Sanitation Districts of Los Angeles County (CSDLAC) operates the Joint Water Pollution Control Plant (JWPCP), a regional wastewater treatment facility, located at 24501 South Figueroa Street in Carson, California. The plant serves about 2.6 million people and treats municipal and industrial wastewater, as well as sludge from other CSDLAC wastewater treatment plants located upstream of JWPCP.
2. JWPCP discharges a blend of advanced primary (about 40%) and secondary (about 60%) effluents. From the plant after chlorination, the effluents travel about 6.5 miles through tunnels and mix at the outfall manifold before discharged to the Pacific Ocean, at Whites Point off the Palos Verdes Peninsula. The outfalls are described as follows:
Discharge Serial No. Description
001 Latitude - 330 41' 52"
Longitude - 1180 19' 27"
120-inch ocean outfall at about 12,000 feet due south of shoreline off
Whites Point, San Pedro and about 200 feet below the ocean
surface. This outfall carries about 65% of the effluent.
002 Latitude - 330 42'02"
Longitude - 1180 20' 14"
3. 90-inch ocean outfall at about 10,400 feet offshore southwest of Whites Point, San Pedro, and about 200 feet below the ocean surface. This outfall carries about 35% of the effluent.
The City operates the Avalon Wastewater Treatment Facility located on Pebbly Beach Road, near the southeastern coastal tip of Santa Catalina Island, Los Angeles County, California (see Figure 1, Location Map). The facility treats municipal wastewater, which is a mixture of fresh and salt water, from domestic and commercial sources. It has an average dry weather design treatment capacity of 1.2 millions gallons per day (mgd). Currently, the discharge from the facility during dry weather annually averages 0.63 mgd with the highest monthly average of 0.73 mgd occurring during the summer months. The treated wastewater is discharged to the Pacific Ocean, a water of the United States, through an ocean outfall at a depth of about 120 feet and 400 feet from the shoreline off Pebbly Beach, at latitude: 33°20'19", and longitude: 118°18'40".
The Hyperion Treatment Plant has two ocean outfalls which may be utilized to discharge treated wastes to the Pacific Ocean. The outfall discharge points are as follows:
Discharge Serial No. 001 - this is a 12-foot diameter outfall terminating at about 5,364 feet west-southwest of the treatment plant at a depth of about 50 feet below the ocean surface (Latitude: 33o 55' 05" N; Longitude 118o 26' 52" W). This outfall has not been used since 1984, and is permitted only for emergency use for discharge of chlorinated secondary effluent during extremely high flows, power failures, and preventive maintenance, such as opening and closing the outfall gate valve (s) routinely for exercising and lubrication. The Regional Board and USEPA shall be notified in advance of any planned preventive maintenance on the outfall Discharge Serial No. 001. Storm water runoff from a portion of the plant is also discharged at this outfall.
Discharge Serial No. 002 - this is usually referred to as "5 - mile
outfall"; a 12-foot diameter outfall terminating at about 26,525 feet west-southwest
of the treatment plant at a depth of about 187 feet below the ocean surface.
This outfall is north of Discharge Serial No. 001 and ends in a "Y" shaped
diffuser consisting of two 3,840-foot legs (Latitude: 33o 54' 45" N; Longitude:
118o 31' 15" W). During normal operations, this is the only outfall
permitted for the discharge of secondary effluent.