§ 441.30 Pretreatment standards for existing sources (PSES).
No later than July 14, 2020, any existing source subject to this part must achieve the following pretreatment standards:
(a) Removal of dental amalgam solids from all amalgam process wastewater by one of the following methods:
(1) Installation, operation, and maintenance of one or more amalgam separators that meet the following requirements:
(i) Compliant with either the American National Standards Institute (ANSI) American National Standard/American Dental Association (ADA) Specification 108 for Amalgam Separators (2009) with Technical Addendum (2011) or the International Organization for Standardization (ISO) 11143 Standard (2008) or subsequent versions so long as that version requires amalgam separators to achieve at least a 95% removal efficiency. Compliance must be assessed by an accredited testing laboratory under ANSI's accreditation program for product certification or a testing laboratory that is a signatory to the International Laboratory Accreditation Cooperation's Mutual Recognition Arrangement. The testing laboratory's scope of accreditation must include ANSI/ADA 108-2009 or ISO 11143.
(ii) The amalgam separator(s) must be sized to accommodate the maximum discharge rate of amalgam process wastewater.
(iii) A dental discharger subject to this part that operates an amalgam separator that was installed at a dental facility prior to June 14, 2017, satisfies the requirements of paragraphs (a)(1)(i) and (ii) of this section until the existing separator is replaced as described in paragraph (a)(1)(v) of this section or until June 14, 2027, whichever is sooner.