Sampling Protocol

Samples were collected as described by the WA State Department of Health (refer to the link below). Initial samples were the first 250 milliliters (ml) of water taken from the tap after a 6 to 18 hour shut down. Prior to shutting down, sampling personnel flushed cold water through the system.

Re-testing samples have the same preliminary flush and shut down method. However, after the tap sits for 6 to 18 hours, cold water is flushed for 30 seconds prior to collection of the 250 ml sample.