1. American Public Health Association (1998a) Alkalinity (2320)/titration method. In: Clesceri LS, Greenberg AE, Eaton AD (eds) Standard methods for the examination of water and wastewater, 20th edn. American Public Health Assoc, Washington, pp 2.26–2.30
2. American Public Health Association (1998b) Acidity (2310)/titration method. In: Clesceri LS, Greenberg AE, Eaton AD (eds) Standard methods for the examination of water and wastewater, 20th edn. American Public Health Assoc, Washington, pp 2.24–2.26
3. Amos PW, Younger PL (2003) Substrate characterization for a subsurface reactive barrier to treat colliery spoil leachate. Water Res 37:108–120
4. Appelo CAJ, Postma D (1993) Geochemistry, groundwater and pollution. AA Balkema Publ, Brookfield, 536 pp
5. Ball JW, Nordstrom DK (1991) User’s manual for WATEQ4F with revised data base: USGS Open-File Report 91–183,
http://www.brr.cr.usgs.gov/projects/GWC_chemtherm/pubs/wq4fdoc.pdf
, 189 pp