What does the study entail?
Rhodamine WT dye will be released in San Pedro Creek
near its discharge point into the ocean. Water will be
sampled in multiple locations inside surf zone to track
how the dye travels. Water sampling will last for 6
hours after the release. Dye will be released on
three separate days after rain events during January ¡V
April 2013. The exact dates are to be confirmed
based on weather conditions. The experiments will be
conducted during the daytime.
What will it look like?
This depends on how close one is to the point of
release, how long it is after the release, and the water
circulation. Often, dye is not highly visible and
sensitive instruments must be used to detect presence.
Rhodamine WT dye is a pinkish-red color. Don¡¦t expect
the beach water to change color. A small portion of the
creek may turn red for a short period of time.
How long will the dye last?
This depends in part on how the circulation on the
beach, wave conditions, and the stream flow rate. The
dyes degrade naturally within 2 to 7 days.
Are the dyes safe?
Rhodamine is one of the most frequently used dyes in
environmental studies. When released into the beach, it
will immediately become diluted. Known potential adverse
reactions occur only with direct contact at high
concentrations. Because of the rapid dilution of the
dye, exposure to the dye at its full strength will be
very unlikely. Refer to Material Safety Data Sheet for more information
about the dye.
Where should I do if humans or animals get in contact
with the dye?
contact of the dye at undiluted concentration may cause
eye irritation and slight skin irritation in sensitive
individuals. In the unlikely event of unprotected eye
contact, immediately rinse with flow water for at least
15 minutes while holding eyelids open. For skin contact,
wash affected area with soap and rinse with plenty of
water. Refer to
Material Safety Data Sheet for details
and get immediate medical attention.