Hall et al. (1999)

Hall K. J., Kiffney P., Macdonald R., McCallum D., Larkin G., Richardson J., Schreier H., Smith J. & Zandbergen P. 1999. Non-point source contamination in the urban environment of greater Vancouver: a case study of the brunette river watershed. Vancouver, B.C.
Mean concentration. Data are from 36 weekly samples collected between Jan 31, and Nov 14, 1995.