The District implemented a Dental Office amalgam handling and control program in 2008-2010, requiring all Dentists who remove or replace amalgam to install an ISO 11143 certified amalgam separator device and practice best management practices for the removal and replacement of amalgam. The District required a one time amalgam separator installation certification form, and an annual certification of practicing best management practices for amalgam handling.

In 2018, the EPA published the Dental Office Category Rule at 40 CFR Part 441, establishing effluent limitations guidelines and standards for Dental Offices. All Dental Offices to whom the rule applies within our District are required to comply with the EPA Dental Office Category Rule, and submit the Oro Loma Sanitary District One Time Compliance Report for Dental Dischargers.

Information on the Rule, Applicability and Deadlines

Information on EPA Dental Office Category Rule 40 CFR Part 411 may be found at

Please refer to the EPA’s frequently asked questions document located on the EPA Dental Effluent Guidelines Documents page, for a full explanation of applicability, deadlines and other information.

Reporting Requirements

Dental offices that place or remove amalgam must operate and maintain a 40 CFR 441 compliant amalgam separator and must not discharge scrap amalgam or use certain kinds of line cleaners. Existing and new sources must submit a one-time compliance report to their pretreatment Control Authority. The Control Authority for Dental Facilities within the Oro Loma Sanitary District boundaries is the Oro Loma Sanitary District.

The OLSD One Time Compliance Report for Dental Dischargers may be downloaded, completed, signed and submitted to the District as follows:

Attention: Industrial Waste Inspector
Oro Loma Sanitary District
2655 Grant Avenue
San Lorenzo, CA 94580-1838