Statutes, codes, and regulations
Michigan Administrative Code
Department - Environmental QualityDrinking Water And Municipal Assistance DivisionSupplying Water to the Public
Part 27 - LABORATORY CERTIFICATION
Section R. 325.12707 - Certification for disinfection byproducts analyses

Mich. Admin. Code R. 325.12707

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Current through Vol. 24-21, December 1, 2024
Section R. 325.12707 - Certification for disinfection byproducts analyses

Rule 2707. To receive certification to conduct analyses for the disinfection byproduct contaminants in R 325.10610, R 325.10610c to R 325.10610d, and R 325.10719g to R 325.10719n, the laboratory shall comply with all of the following:

(a) Analyze Performance Evaluation (PE) samples that are acceptable to United States environmental protection agency or the department not less than once during each consecutive 12-month period by each method for which the laboratory desires certification.
(b) The laboratory shall achieve quantitative results on the PE sample analyses that are within the acceptance limits in table 1 of this rule:

Table 1 Acceptance limits

DBP Acceptance limits (percent of true value)
TTHM Chloroform +/-20 Laboratory shall meet all 4 individual THM acceptance limits to successfully pass a PE sample for TTHM
Bromodichloromethane +/-20
Dibromochloromethane +/-20
Bromoform +/-20
HAA5
Monochloroacetic Acid +/-40 Laboratory shall meet the acceptance limits for 4 out of 5 of the HAA5 compounds in order to successfully pass a PE sample for HAA5
Dichloroacetic Acid +/-40
Trichloroacetic Acid +/-40
Monobromoacetic Acid +/-40
Dibromoacetic Acid +/-40
Chlorite +/-30
Bromate +/-30

Mich. Admin. Code R. 325.12707