Storm Water Pollution Prevention Plan (SWPPP) Practice Test

Which of the following is not considered an allowable stormwater or non-stormwater discharge?

1. Discharges from irrigation systems

2. Discharges of uncontaminated groundwater

3. Discharges of contaminated groundwater

4. Discharges from construction site runoff

The correct answer is: Discharges of contaminated groundwater

The choice identifying discharges of contaminated groundwater as not being an allowable stormwater or non-stormwater discharge is indeed correct. Contaminated groundwater carries pollutants that could adversely affect surface water quality when discharged. This is particularly significant in the context of a Storm Water Pollution Prevention Plan (SWPPP), which aims to minimize the introduction of pollutants into stormwater systems to protect water bodies from contamination. In contrast, discharges from irrigation systems and uncontaminated groundwater are often considered acceptable under certain conditions, as they do not introduce harmful pollutants into the environment. Similarly, while discharges from construction site runoff can pose risks, they are typically regulated and can be managed effectively through proper erosion and sediment control practices as part of an SWPPP, making them allowable under specific guidelines. The key takeaway is that any discharge containing contaminants poses a risk to water quality and is not permissible in the context of stormwater management.