Industrial Waste Pretreatment

The District routinely monitors the industrial discharge into the sanitary sewer system through site inspections and Video Inspections. All traps/ interceptors must contain original design equipment and must be cleaned out on a regular basis. Cleaning frequency depends on the size of the trap, size of the facility, and activity of the industry. Industrial/ Commercial users must keep grease trap/ interceptor cleaning documentation for a minimum of (3) three years on-site.

Restaurant Requirements
Restaurants must comply with the District's pretreatment requirements and discharge limits for oil and grease (located in Ordinance No. 39-8).

Car Wash Requirements
Car Washes must comply with the District's pretreatment requirements and discharge limits (located in Ordinance No. 39-8). Illegal dumping through a car wash is strictly enforced. No engine steam cleaning is allowed.

Auto Shop/ Parts Cleaners/ Engine Cleaners Requirements
Auto repair facilities must comply with the District's pretreatment requirements and discharge limits (located in Ordinance No. 39-8). If hydrocarbon filters are used they must be replaced per manufacturers recommendations and/ or at a frequency to meet the District's discharge limits. Any type of auto repair facility process discharge without pretreatment equipment is strictly prohibited. Auto Repair Facilities must keep pretreatment equipment, filter replacement, and interceptor cleaning documentation for a minimum of (3) three years on-site. Please be aware that it is prohibited to discharge hazardous materials such as used motor oil, solvents, etc. All such materials must be properly manifested for disposal.

Dental Office/ Hospital Requirements
Dental offices and hospital discharge must meet our discharge requirements in Ordinance No. 39-8. Dental office and hospital mercury pretreatment equipment is enforced using the "Universal Waste Rule" through the Alameda County Health Agency, Department of Environmental Health - Hazardous Materials Division. Information on the Universal Waste Rule and requirements can be found at www.dtsc.ca.gov.