Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection - Wisconsin Pollutant Discharge Elimination System › Chapter NR 229 - Dental Offices › Section NR 229.03 - Pretreatment standards for existing sources

Current through June 24, 2024
No later than July 14, 2020, any existing source subject to
				  this chapter shall achieve all of the following:
(1) Removal of dental amalgam solids from all
				amalgam process wastewater by one of the following methods:
(a) Installation, operation, and maintenance
				of one or more amalgam separators that meet all of the following requirements:
1. The amalgam separator is compliant with
				ANSI/ADA 108-2009 with the 2011 technical addendum, incorporated by reference.
				Compliance shall 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 shall
				include ANSI/ADA 108-2009 or ISO 11143.
Note:
ANSI/ADA 108-2009 is the American National
				  Standards Institute/American Dental Association Specification for Amalgam
				  Separators, published in 2009. Copies of ANSI/ADA 108-2009 and the 2011
				  technical addendum are available at
http://www.ada.org
. Copies are also available
				  for inspection at the offices of the department of natural resources and the
				  legislative reference bureau. Note that ANSI/ADA 108-2009, along with the 2011
				  addendum, is identical to ISO 11143:2008, which is available at
http://webstore.ansi.org
.
2. The amalgam separator is sized to
				accommodate the maximum discharge rate of amalgam process wastewater.
3. A dental discharger that operates an
				amalgam separator that was installed at a dental facility prior to June 14,
				2017, satisfies the requirements of subds. 1. and 2. until the existing
				separator is replaced as described under subd. 5., or until June 14, 2027,
				whichever is sooner.
4. The amalgam
				separator is inspected in accordance with the manufacturer's operating manual
				to ensure proper operation and maintenance of the separator and to confirm that
				all amalgam process wastewater is flowing through the amalgam retaining portion
				of the amalgam separator.
5. In the
				event that an amalgam separator is not functioning properly, the amalgam
				separator is repaired consistent with manufacturer instructions or replaced
				with a unit that meets the requirements under subds. 1. and 2. as soon as
				possible, but no later than 10 business days after the malfunction is
				discovered by the dental discharger, or an agent or representative of the
				dental discharger.
6. The amalgam
				retaining unit is replaced in accordance with the manufacturer's schedule as
				specified in the manufacturer's operating manual or when the amalgam retaining
				unit has reached the maximum level, as specified by the manufacturer in the
				operating manual, at which time the amalgam separator can perform to the
				specified efficiency, whichever comes first.