the participant indicated that the water was treated without
defining the type of treatment. It is possible that the media in the
treatment system may have needed renewal at the first pickup.
Another location had copper values above 1.3 mg L1 on both the
first and second pickup (2.3 and 1.4 mg Cu/L, respectively). All
other locations that fell above 1.3 mg L1 on one pick up, were
below for the other.