Phillips 66 conducts hydo test, harmless florescent-green dye may be visible

By By Frank DiCesare / American Press

Phillips 66 will be conducting a hydro test on one of its storage tanks this afternoon to see if any leaks are detected.

The test uses a florescent-green dye

that may be visible in the ditches along Old Spanish Trail in Westlake.

Carol Collins,

director of public relations for Phillips 66, said the dye is

non-hazardous and biodegradable and not harmful to the community

or environment. Residents should not be concerned if they see it.

“The last time we did this was some months and the dye was quite visible,” she said. “There are times when the public won’t

see it at all because of where it drains. This one I am not sure. They may see something along Old Spanish Trail. If they

do, I don’t want people to get into a panic because it can be a pretty bright color.”

During a hydro test, refinery officials

drain all of the crude oil from the tank and store it on site. Once the

tank has been

emptied, it is filled with water after which the dye is added. The

water is then discharged from the tank into the Faubacher

Ditch. If the tank has a leak, the green dye will seep out and

refinery officials will know where repairs need to be made.

“We’re only testing one of our storage tanks,” Collins said. “The whole idea is that you don’t want to have one of your tanks

leaking. Every so often they do test the tanks to make sure they are not leaking in any way.”

Collins could not confirm which tank at Phillips 66’s refinery was being tested.

The state’s Department of Environmental Quality approves and permits hydo tests, Collin said. She added that stakeholders

and all appropriate agencies have been notified of today’s test.

The green color in the water should diminish within a few days, she said.