1. (a) As specified in 40 CFR §141.80(c)(1), 7-1-16 edition, the lead action level shall be deemed exceeded if the concentration of lead in more than 10% of tap water samples collected in accordance with Env-Dw 714.08 during any monitoring period is greater than 0.015 mg/L, that is, if the 90th percentile as computed pursuant to (c), below, is greater than 0.015 mg/L.
2. (b) As specified in 40 CFR §141.80(c)(2), 7-1-16 edition, the copper action level shall be deemed exceeded if the concentration of copper in more than 10% of tap water samples collected in accordance with Env-Dw 714.08 during any monitoring period is greater than 1.3 mg/L, that is, if the 90th percentile as computed pursuant to (c), below, is greater than 1.3 mg/L.
3. (c) The 90th percentile lead and copper levels shall be computed as specified in 40 CFR §141.80(c)(3)(i) through (v), 7-1-16 edition.

Source. #9859, eff 2-8-11; ss by #12181, eff 5-23-17