How Regular Tank Inspections Help Prevent Water Contamination

Regular inspection and cleaning of water storage tanks are essential to uphold water quality within the distribution system and prolong the tank’s lifespan. Routine tank inspections aid in early detection of minor issues before they escalate into major problems, potentially resulting in health hazards and costly repairs or premature tank failure. Neglecting regular cleaning of tanks can lead to contamination events posing risks to human health or giving rise to aesthetic concerns.

There are two basic types of inspection:

  • Typically, wet inspections are conducted either by certified divers or remotely controlled vehicles (ROVs). A wet water quality inspection is typically mandated by the state.
  • Issues identified during wet inspections often translate into challenges during dry inspections. Dry inspections are primarily conducted to assess structural damage and coating thickness for steel tanks. It’s important to note that dry inspections require the tank to be emptied and taken out of service. Dry inspections typically incur three times the cost of wet inspections.

How Often Should a Water System Inspect and Clean Storage Tanks?

The frequency of inspections and cleanings can vary based on the tank type and water quality. Typically, water storage tanks should undergo inspection at least every five years, with more frequent checks if mandated by state regulations. Cleaning and repairs should be carried out based on the findings of these inspections, with additional checks recommended between scheduled maintenance intervals.

In most states, tank inspectors are not certified. It’s advisable to request a standardized report corresponding to the specific tank from any potential inspector and ensure that the report meets the approval of the state regulatory agency.

In preparation for the 2017 water quality regulations, it’s advisable to engage inspectors capable of providing in-service temperature readings to detect stratification.

Circulation

Water is typically introduced into and extracted from the bottom of the water container through inlet and outlet piping. When the rate of filling exceeds that of extraction, the water level increases, and conversely, it decreases when the extraction rate exceeds the filling rate. If both rates remain consistent, the system withdraws the recently added water. Due to the absence of circulation, the water at the top of the container becomes stratified and stagnant. Moreover, stagnant water may result in chlorine depletion, leading to microbial growth and the emergence of unpleasant tastes and odors. Incorporating mixers into your tank is a common and cost-effective solution to mitigate these issues.

Testing for Contaminants

Regardless of the method employed, bacteriological testing is necessary before the tank can be put back into service. The detection of coliform bacteria in post-disinfection sample testing indicates the potential presence of harmful contaminants in the water.

While water analysis helps ascertain whether microbes and bacteria in a water sample pose a public health risk, other contaminants are detectable within the tank. Sediment such as dirt, mud, sand, rust, and other particles can accumulate at the tank bottom, obscuring what would otherwise be a clean white surface with inches of sediment. Excessive sediment accumulation can also lead to clogged outlet pipes if sediment settles in the pipes.

To discuss any of the concepts described here in more detail, our friendly and experienced customer service team can help. We offer tried and tested services around Houston, Texas and Longbeach, California.

Call Panel Tanks Vegas by American Tanks at +1 800 656 0167

Or email at info@paneltanks.vegas

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