Combined storage tanks are designed to store multiple liquids or gases in a single tank, allowing for more efficient use of space and reduced environmental impact. This type of tank is commonly used in industries such as oil and gas, chemical processing, and wastewater treatment.
One of the key benefits of combined storage tanks is their ability to store different substances in separate compartments, preventing contamination and improving safety. This is particularly important in industries where the storage of hazardous materials is involved.
The use of combined storage tanks can also help reduce the overall cost of storage infrastructure, as a single tank can replace multiple individual tanks. This can be a significant advantage for companies looking to optimize their storage capacity.
Proper design and installation of combined storage tanks are crucial to ensure safe and efficient operation. Factors such as tank size, material, and compartmentalization must be carefully considered to prevent leaks, corrosion, and other potential issues.
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Construction and Maintenance
Combined storage tanks are designed to be durable and long-lasting, with a typical lifespan of 20 to 30 years.
The tank's material, such as steel or fiberglass, plays a significant role in its durability.
Regular maintenance is crucial to extend the tank's lifespan and prevent costly repairs.
Construction Advisory for Gowanus Canal Storage Tanks
The construction project for the Gowanus Canal Combined Sewer Overflow Storage Tanks is a significant undertaking that will improve the health of the neighborhood and create public waterfront open space.
DEP is constructing an underground storage tank that will capture 4 million gallons of sewage and rainwater that would otherwise overflow into the canal during rainstorms.
The tank will be located along the eastern side of the Gowanus Canal, bounded by Second Avenue and 6th Street. This area will be transformed into a 2-acre public waterfront open space.
Crews will be working around the clock on the construction of the tank's underground perimeter wall, which is a crucial part of the project.
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DEP has implemented a robust community air monitoring program to protect residents and construction crews. This includes eight automatic monitoring stations around the perimeter of the construction site that operate continuously during working hours.
The monitoring data, which is updated daily, is available on DEP's website. This allows the public to stay informed about air quality and other construction-related issues.
DEP does not anticipate nuisance odors during construction, but they will perform daily odor inspections and take measures to control any odors that arise.
Inspections and Cleaning
Inspections and Cleaning are crucial steps in maintaining water storage tanks. Regular inspections ensure the tanks are in good condition and prevent potential issues.
The AVHCWD system has a rigorous inspection and cleaning schedule, with tanks inspected and cleaned every 3-5 years, or sooner if necessary. Our last inspection and cleaning was performed in January 2023.
To ensure the safety of the crew, MIT will provide equipment, materials, labor, and insurance for the complete interior preparations and relining of the tanks. This includes a Confined Space, Constant Atmospheric Air/Gas Monitoring, Fall protection, and OSHA 30 trained work crew.
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A scaffold will be provided to access the complete interior of the tank, and all needed oil-free air compressors will be verified to ensure they meet the required standards. The crew will also wear proper PPE, including ear plugs, fresh air-supplied blast helmets, coveralls, chaps, fall protection, and leather blast gloves.
The tanks will be blasted using Kleen-Blast 16/30 grit or Garnet to achieve a 3-4 mil profile near white blast as required by the coating manufacturer. SSPC SP-10 will be adhered to during this process.
Here are the specific tasks that will be performed during the inspection and cleaning process:
- Safety - Confined Space, Constant Atmospheric Air/Gas Monitoring, Fall protection, and OSHA 30 trained work crew, NACE Level 2
- Provide entry permit, testing, and gas monitoring of the atmosphere in the tank as required for the safety of crew on the interior at all times.
- Provide a scaffold to access the complete interior of the tank.
- Provide all needed oil-free, Air compressors - Verify oil-free air - by way of “Blotter Test”.
- Blasters to wear proper PPE - Ear Plugs, Fresh Air-supplied Blast Helmets, Coveralls, Chaps, Fall protection (Harness, Lanyard, and Lifeline), and leather blast gloves.
- Provide Abrasive-blast, using Kleen-Blast 16/30 grit or Garnet to achieve, a 3-4 mil profile near white blast as required by the coating manufacturer. SSPC SP-10.
- Verify results of anchor pattern/profile, by use of Testex Press-O-Film Replica Tape and a Surface profile comparator. (X-course).
Projects and Initiatives
Combined storage tanks are being used in various projects to optimize storage capacity and reduce costs.
One notable project is the construction of a large-scale storage facility in a remote area, where a combined storage tank system was implemented to minimize transportation costs and environmental impact.
Combined storage tanks have also been used in industrial settings to increase storage capacity and streamline operations.
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In one such example, a manufacturing facility used a combined storage tank system to store chemicals and raw materials, resulting in a 30% reduction in storage space.
The modular design of combined storage tanks allows for easy expansion and reconfiguration, making them ideal for projects with changing storage needs.
A project in a densely populated urban area utilized combined storage tanks to provide additional storage capacity without taking up too much space.
Storage Tanks Overview
The AVHCWD system has four existing bolted steel potable water storage tanks with a combined storage capacity of 260,000 gallons.
These tanks are crucial in pressurizing the distribution system pressure zones while the system's wells are off. The tanks are located on two separate properties owned by the BLM.
The Mesa Vista Tank Site has three storage tanks, each with a maximum storage capacity of 20,000 gallons, serving AVHCWD's Lower Zone. The system's wells supply water directly to the distribution system, with excess capacity filling the Mesa Vista tanks.
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The Central Tank Site has one bolted steel storage tank with a maximum capacity of 200,000 gallons, serving AVHCWD's Upper Zone. The Central Tank delivers water from the Lower Zone via the Roundup Booster Station.
AVHCWD has a regular maintenance schedule for their water storage tanks, with inspections and cleanings performed every 3-5 years, or sooner if necessary. Our last inspection and cleaning was performed in January 2023.
In May 2023, the east Mesa Vista Tank sprung a leak on the bottom, which was repaired in June. Due to the age and condition of the Mesa Vista Tanks, the Board of Directors approved a project to re-line all three storage tanks, with work beginning on March 1, 2024.
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Frequently Asked Questions
What is the life expectancy of a storage tank?
The life expectancy of a storage tank typically ranges from 20 to 25 years, depending on its construction material. However, the actual lifespan may vary, so it's worth learning more about the factors that affect a storage tank's durability.
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