Section 611.490  Certified Laboratories

a)         For the purpose of determining compliance with Subparts G, K through O, Q, and S, samples will be considered only if they have been analyzed by one of the following:

1)         A laboratory certified under Section 4(o) of the Act;

2)         A laboratory certified by USEPA;

3)         When no laboratory has been certified under subsection (a)(1) to analyze a particular contaminant, a laboratory certified, registered, accredited, licensed, or otherwise approved by another state with primary enforcement responsibility, or an agency of the federal government, unless the Agency has, by written notice, informed the supplier that a particular laboratory or laboratories may not be used; or

4)         For measurements of alkalinity, calcium, conductivity, disinfectant residual, orthophosphate, silica, turbidity, free chlorine residual, temperature, and pH, a person under the supervision of a certified operator (35 Ill. Adm. Code 603.103).

b)         Nothing in this Part must be construed to preclude the Agency or any duly designated representative of the Agency from taking samples or from using the results from such samples to determine compliance by a supplier of water with the applicable requirements of this Part.

c)         The CWS supplier must have required analyses performed either at an Agency laboratory or a certified laboratory.  The Agency may require that some or all of the required samples be submitted to its laboratories.

BOARD NOTE:  Subsections (a)(1), (a)(2), (a)(4), and (b) are derived from 40 CFR 141.28.  Subsections (a)(3) and (c) are additional State requirements.

(Source:  Amended at 44 Ill. Reg. 6996, effective April 17, 2020)