Wash. Admin. Code § 246-272A-0130

Current through Register Vol. 24-21, November 1, 2024

Section 246-272A-0130 - Bacteriological reduction

This section establishes the requirements for registering bacteriological reduction processes.

(1) Manufacturers shall, for the purpose of product registration as described in WAC 246-272A-0110 and 246-272A-0120:

(a) For meeting treatment level BL1, verify bacteriological reduction performance by sampling for fecal coliform or E. coli.

(b) For meeting treatment level BL2 or BL3, verify bacteriological reduction performance by sampling for fecal coliform.

(2) All test data submitted for product registration shall be produced by an ANSI accredited, third-party testing and certification organization whose accreditation is specific to on-site wastewater treatment products. Bacteriological reduction performance must be determined either:

(a) According to the procedures in NSF/ANSI 385 for supplemental bacteriological reduction; or

(b) Concurrent with testing protocol. The treatment product or treatment component sequence testing according to the NSF/ANSI 40 testing protocol.

(3) Testing under subsection (2)(b) of this section shall be completed in compliance with the following requirements:

(a) Collect samples from both the influent and effluent streams, identifying the treatment performance achieved by the full treatment process, component or sequence;

(b) Obtain influent characteristics falling within a range of 10⁴ - 10⁸ fecal coliform/100 mL or 10² - 10⁶E. coli/100 mL calculated as 30-day geometrics;

(c) Test the influent to any disinfection unit and report the following at each occasion of sampling performed in (d) of this subsection:

(i) Flow rate;

(ii) pH;

(iii) Temperature;

(iv) Turbidity; and

(v) Color;

(d) Obtain samples for fecal coliform or E. coli analysis during both the design loading and stress loading periods identified by NSF/ANSI 40. Grab samples shall be collected from both the influent and effluent on three separate days of the week. Each set of influent and effluent grab samples must be taken from a different dosing time frame, either morning, afternoon, or evening, so that samples have been taken from each dosing time frame by the end of the week;

(e) Conduct analyses according to standard methods;

(f) Report the geometric mean of fecal coliform or E. coli test results from all samples taken within 30-day or monthly calendar periods;

(g) Report the individual results of all samples taken throughout the test period design and stress loading; and

(h) Report all maintenance and servicing conducted during the testing period, including for example, instances of cleaning a UV lamp, or replenishment of chlorine chemicals.

(4) Manufacturers may register products in treatment levels BL1 and BL2 using disinfection.

(5) Manufacturers may not register products for treatment level BL3 using disinfection.

Wash. Admin. Code § 246-272A-0130

Amended by WSR 24-06-046, Filed 3/1/2024, effective 4/1/2024

Statutory Authority: RCW 43.20.050. 06-01-020, § 246-272A-0130, filed 12/12/05, effective 1/12/06; 05-15-119, § 246-272A-0130, filed 7/18/05, effective 9/15/05.