After being notified by the laboratory of an elevated level of lead in a drinking water outlet, schools shall:
A. Within 24 hours, prevent all physical access to water from the drinking water outlet until the problem is mitigated;
B. Within 5 school days, collect a flushed sample from each outlet for which the first-draw sample result exceeded 20 ppb of lead;
C. Have the flush sample analyzed by a certified laboratory; and
D. Continuously maintain an adequate supply of drinking water to school occupants that meets the current Safe Drinking Water Act standards.