1. EPA (2015). “Leaking Underground Storage Tanks Corrective Action Resources”. Retrieved from https://www.epa.gov/ust/leaking-underground-storage-tanks-corrective-action-resources.
2. Freeze R.A. and Cherry J.A. (1979). “Groundwater.” 604 pgs.
3. Geotechdata.info Soil void ratio http://geotechdata.info/parameter/soil-void-ratio.html
4. GSI Environmental (2014). “GSI Chemical Properties Database.” < www.gsi-net.com/en/publications/gsi-chemical-database.html > accessed 2014.
5. Contamination of Potable Water by Permeation of Plastic Pipe