Mich. Admin. Code 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 |
Notes
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