Razzaghmanesh et al. (2014) Razzaghmanesh M., Beecham S. & Kazemi F. 2014. Impact of green roofs on stormwater quality in South Australian urban environment. Science of The Total Environment 470-471C:651-659. Extensive (100-250 mm) green roof type B (comprised scoria, composted pine bark and hydro-cell flakes). Osmocote fertilizer applied over a 15 week period. Calculated reduction efficiencies by StormTac from presented data.