1. Groundwater Pollution

2. Groundwater Pollution
Non-point Sources
Pesticides
Fertilizers
Petroleum products (oil, gasoline from roads)
Point Sources
Underground Storage Tanks (USTs)- gas stations, oil tanks, factories
Septic Tanks from homes
Unlined Landfills
Wastewater or Manure Lagoons

3. Industrial wastewater lagoon
Manure Lagoon
Underground Storage Tank (UST)
Industrial wastewater lagoon

4. Septic Tanks

6. Plume- a continuous emission from a point source that has a starting point and observable pathway
earthsci.org

7. Cleaning Groundwater Pollution
Extremely difficult problem to solve:
Aquifers are difficult to access, unlike surface water
Recharge and flow rates are very slow
Soil and Rock can “cling” to pollutants for many years

8. Remediation- the process of cleaning up pollution
In situ remediation- cleans up contaminated soils and groundwater without removing any materials; minimal disturbance
Ex situ remediation- removes contaminated material from the site to be either:
Dumped in a secure, off-site location (ex: landfill)
Cleaned and then replaced in original location

9. Groundwater Contamination Lab
Arsenic Investigation
Lab objective: Determine the source of Arsenic using well data from a community
Complete Part 1, then pick up Part 2 up front