Infiltration may result from which condition?

Infiltration may result from which condition?

• A. Bad joints
• B. Improper closed circuit TV operation
• C. Poor ventilation
• D. Direct downspout and drain connections

Answer: (A)

Infiltration is groundwater entering a sewer system through defects in the pipe or joints. When joints are bad, openings form in the sewer, allowing surrounding groundwater to seep in, especially during wet weather when the groundwater level is high. That makes faulty joints the source of infiltration. The other possibilities don’t fit the mechanism: direct downspout and drain connections bring surface water into the sewer as inflow, not groundwater seeping through the pipe; poor ventilation affects gas pressure and odor control rather than water entering through joints; improper operation of a closed-circuit TV is a testing method issue, not a cause of infiltration.

Infiltration is groundwater entering a sewer system through defects in the pipe or joints. When joints are bad, openings form in the sewer, allowing surrounding groundwater to seep in, especially during wet weather when the groundwater level is high. That makes faulty joints the source of infiltration. The other possibilities don’t fit the mechanism: direct downspout and drain connections bring surface water into the sewer as inflow, not groundwater seeping through the pipe; poor ventilation affects gas pressure and odor control rather than water entering through joints; improper operation of a closed-circuit TV is a testing method issue, not a cause of infiltration.