The T-value in the score for hazard refers to chronic toxicity.
Fass environmental information for Telzir (fosamprenavir) (downloaded 2018-06-15).
Persistence: "Fosamprenavir is not readily biodegradable nor inherently biodegradable."
Bioaccumulation: "Log P < 1.00 (method unknown)."
Toxicity: There are data for 3 trophic levels, most sensitive crustacean (Ceriodaphnia dubia) NOEC = 100 mg/L.
PEC/PNEC is based on sales data in Sweden in year 2014. PEC/PNEC = 1.80 x 10-7, i.e. insignificant.
"An assessment of the risk was performed and no significant risk to the environment related to the use of fosamprenavir is anticipated."
Author: The Pharmaceutical unit of Region Stockholm