(a) Where the results of sampling for asbestos indicate that the concentration of asbestos is greater than or equal to 50% of the MCL, the O/O shall:
- (1) Collect a confirmation sample within 14 days after the initial sample was collected at the same sampling point and under the same contributing conditions; and
- (2) Have the sample analyzed within 48 hours of collection, as required by 40 CFR 141.23(k)(2).
- (b) Where confirmation samples are taken, compliance shall be determined based on the average of the 2 samples.
Source. #9700, eff 5-1-10; ss by #12668, eff 1-1-19