Section R. 325.12702 - Certification for inorganic chemical analysesRule 2702.
(1) To receive certification to conduct analyses for antimony, arsenic, asbestos, barium, beryllium, cadmium, chromium, cyanide, fluoride, mercury, nickel, nitrate, nitrite, selenium, and thallium, a laboratory shall comply with both of the following provisions:(a) Analyze performance evaluation samples provided by the United States environmental protection agency, the department, or by a third party, with the approval of the department or the United States environmental protection agency, at least once per year.(b) For each contaminant that has been included in the performance evaluation sample and for each method for which the laboratory desires certification, achieve quantitative results on the analyses that are within the acceptance limits in table 1 of this rule. Table 1 Acceptance limits
| Contaminant | Acceptance Limit milligrams per liter (mg/l) |
| Antimony | +/-30% at 0.006 mg/l. |
| Arsenic | +/-30% at 0.003 mg/l |
| Asbestos | 2 standard deviations based on study statistics. |
| Barium | +/-15% at 0.15 mg/l. |
| Beryllium | +/-15% at 0.001 mg/l. |
| Cadmium | +/-20% at 0.002 mg/l. |
| Chromium | +/-15% at 0.01 mg/l. |
| Copper | +/-10% at 0.050 mg/l. |
| Cyanide | +/-25% at 0.1 mg/l. |
| Fluoride | +/-10% at 1 to 10 mg/l. |
| Lead | +/-30% at 0.0050 mg/l. |
| Mercury | +/-30% at 0.0005 mg/l. |
| Nickel | +/-15% at 0.01 mg/l. |
| Nitrate | +/-10% at 0.4 mg/l. |
| Nitrite | +/-15% at 0.4 mg/l. |
| Selenium | +/-20% at 0.01 mg/l. |
| Thallium | +/-30% at 0.002 mg/l. |
(2) To receive certification to conduct analyses for lead and copper, a laboratory shall be in compliance with all of the following requirements:(a) Analyze performance evaluation samples, including lead and copper, that are provided by the United States environmental protection agency, the department, or by a third party, with the approval of the department or the United States environmental protection agency, at least once per year by each method for which the laboratory desires certification.(b) Achieve quantitative acceptance limits as specified in table 1 of this rule and as follows: (i) Lead: +/-30% of the actual amount in the performance evaluation sample when the actual amount is greater than or equal to 0.005 mg/l. the practical quantitation level, or PQL, for lead is 0.005 mg/l.(ii) Copper: +/-10% of the actual amount in the performance evaluation sample when the actual amount is greater than or equal to 0.050 mg/l. the practical quantitation level, or PQL, for copper is 0.050 mg/l.(c) Achieve method detection limits (MDLs) according to the procedures specified in 40 C.F.R. part 136, appendix B, as follows:(i) Lead: 0.001 mg/l, only if source water compositing is performed.(ii) Copper: 0.001 mg/l, or 0.020 mg/l when atomic absorption direct aspiration is used, only if source water compositing is performed.(d) All lead and copper levels measured between the PQL and MDL shall be either reported as measured or they shall be reported as 1/2 the PQL specified for lead and copper in subdivision (b) of this subrule. All levels below the lead and copper MDLs shall be reported as zero.(e) All copper levels measured between the PQL and the MDL shall be either reported as measured or they shall be reported as 1/2 the PQL (0.025 mg/l).All levels below the copper MDL shall be reported as zero.Mich. Admin. Code R. 325.12702
1994 AACS; 1998 AACS; 2005 AACS