Basic HTML Version
MERC ER01-10
16
Discharge Toxicity
Residual Chlorine Analysis -
Levels of residual chlorine (or total residual oxidants -
TRO) were at or below the method detection limit (MDL) of 0.02 ppm in all TF treated samples.
Acute Toxicity -
There were no statistically significant survival effects in any test for
either acutely tested species (Mysid
shrimp or Sheepshead minnows).
Chronic Toxicity
- Results showed that ballast water discharge was not chronically toxic
to either mysids or sheepshead minnows. All samples, however, were chronically toxic to the
marine algal species
Isochrysis galbana
with a statistically significant inhibition in growth in
treated ballast discharge compared to controls
(see details under Summary of Results on page 4).