This Ammonia Tank was designed to store liquid ammonia at a bone chilling -28 degrees for an Ammonia plant.

The 135’ diameter single containment tank was designed, fabricated and erected per API 620 Appendix R. The tank weighs approximately 980 tons empty and with 17.5 million gallons of product inside, it weighs in at nearly 30,980 Tons or almost 62 million pounds.

A heating system is typically installed to prevent the soil under the foundation from freezing, and guards against damage to the slab from the extreme cold. This tank was built on a raised pile cap foundation that eliminated the need for a foundation heating system. Foam glass insulation was installed between the concrete pile cap and the tank’s steel bottom to protect the concrete cap from the very cold operating temperature of the tank itself.

The specially designed dome roof was constructed on the ground inside the tank and air raised it into place along with the suspended insulated deck that hangs from the inside of the dome roof. This made erection safer and more economical. Once the dome roof was in place, the tank’s exterior was painted.

To minimize the heat leak and product boil off, an extensive insulation system was designed and installed to maintain the very cold -28 degrees F. The insulation system included Horizontal Foam In Place (HFIP) with an aluminum vapor barrier that was sprayed onto the shell and a Foam In Place (FIP) insulation that was sprayed onto the roof. The spray foam insulation is integrally bonded to both the tank shell and the aluminum vapor barrier making it very resistant to severe weather.

The single containment tank system includes a vapor recovery system and an earthen dike around the tank foundation to ensure that all potential vapor emissions and liquid leakage will be fully contained.

To obtain access to the top of the roof and the roof nozzles, a 5′ diameter stair tower, access platform and roof stairway were added.

The result is a Gigantic tank, capable of holding over 17 million gallons of anhydrous ammonia, that will safely serve the customer’s fertilizer plant showing once again, that welded steel is the material of choice.

A terminal in Corpus Christi, TX that stores propane and butane products needed to develop 1,000,000 barrels of LPG storage capacity. EF90 chose a single source solution tank contractor to construct six (6) API-620 LPG storage tanks with dome roofs.

Adhering to the scope of work, the contractor engineered, procured, fabricated, and constructed six (6) tanks with single wall suspended decks. Additionally the scope included tank insulation, painting, and quality testing.

Quantity – Capacity – Dimensions – Product

4 each – 200,000 bbls – 150’ dia. x 68’ high – refrigerated propane

2 each – 100,000 bbls – 117’ dia. x 59’ high – refrigerated butane

Air Raised Dome Roofs

The contractor developed a thorough procedure to build dome roofs near the bottom of the tank and then air raise them into final position at the top of the tank. These 200+ ton roofs were built in pieces and utilized sub-assemblies on temporary structures in the low position as a suspended insulation deck was constructed. While in that position, a cable leveling system was installed to assist roof stabilization as it traveled from the bottom of the tank to its final top position. A seal was installed along the periphery of the lower edge of the roof which sealed the roof to the shell. Extensive shell plumb and roundness checks were made to insure a smooth ascent.

Once the roof was in position to begin the ascent to the top of the tank and all of the checklists verified, the contractor installed temporary fans. The roof was raised with a small air pressure of 0.13 psig measured with a monometer. When the roof reached the top position, crews temporarily attached the roof to the top of the tank and then welded the final connection. The entire air raise took between 15 and 120 minutes.

Personnel safety was always paramount during this procedure the same as it was in all aspects of the project. By constructing the roofs at a low elevation, the contractor limited workers’ exposure to dangerous heights, and no injuries were incurred during this project which was completed in 2014 on time and within budget.

In order to respond to the needs of the market, a New Orleans-based bulk liquid storage terminal company planned a major expansion at its Philadelphia, PA, terminal. The terminal company operates 15 bulk liquid storage terminals in the United States that can accommodate everything from food-grade products to specialty chemicals. The company brings value to its customer by developing customized storage solutions, including services such as blending, filtering, steaming and koshering. The terminal company planned to add 10 million gallons of capacity at the Philadelphia terminal by constructing 11 new tanks, including carbon tanks, stainless tanks, and different capacities, and the company needed to get the tanks in service ASAP.

The company’s tank contractor faced three significant challenges – the aggressive schedule was challenging, as was the physical space available for the project. Working in tight spaces with ongoing terminal operations all around the construction site made a clever construction plan a must. The weather was another major challenge – the tank builder began work in December, in Philadelphia. December of 2013 and the winter of 2014 in the Northeast challenged any and all construction projects, and this one was no exception.

In all, 11 new API 650 tanks were constructed on the site in a period of 11 months. The tank contractor provided the tank designs, based on the terminal company’s requirements – dictated by their customers’ storage needs. Nine tanks were carbon steel and two were stainless steel. All of the tank materials (steel plate for the tank shells, bottoms and roofs, as well as ladders, platforms, handrails and stairs) were fabricated in the tank builder’s fabrication shop. Custom design and fabrication capabilities made it possible for the tank contractor to engineer each tank’s design and appurtenances as needed for its end use.

To meet the aggressive schedule, the tank contractor developed a construction plan that included periods of time with three crews working simultaneously on three tanks. During the peak of construction there was a total of 27 men onsite building the tanks. In addition, the tank contractor expedited construction in some cases by working extended shifts in order to stay on schedule.

The tight site conditions presented challenges throughout the project. Initially, the tank contractor used the foundations of unbuilt tanks as valuable real estate for materials and constructing tank roofs. However, as tanks were completed, space became more and more scarce. Toward the end of the project, the tank builder worked creatively and safely to bring materials and equipment over perimeter containment walls and used the limited space in between the newly built tanks to complete the project.

This project included (11) miscellaneous Internal Floating Roof Tanks with Geodesic Dome Fixed Roofs. The tank sizes were six (6) 216′ Dia x 60′ H, one (1) 195′ Dia x 60′ H, two (2) 158′ Dia x 60′ H, one (1) 123′ Dia x 60′ H, and one (1) 112′ Dia x 60′ H. The customer had an aggressive schedule that we were able to accommodate, given the fact that we were in the process of completing Phase I at the time of Phase II being awarded. We were able to integrate the Phase II scope of work into our current project execution plan for Phase I. This meant utilizing some of our previously mobilized on-site resources to complete these tanks, along with additional manpower that was coming off of other projects during that time period. It allowed us to reduce the schedule by approximately 3 months from our original proposal, or about a 20% reduction in the overall schedule. The customer saw the value in overlapping these two projects and we were able to meet their need dates and complete these 11 tanks inside a twelve month time-frame.

Part of meeting the schedule dates, meant we had to work closely with our dome subcontractor to coordinate their installation. We worked out several different methods in order to provide for the most expedient erection. Those methods included erecting the dome on the tank bottom, on the installed floating roof and outside the tank which was later lifted onto the finished tank. This allowed the schedule to be flexible, allowing us to meet the commercial completion dates.

Overall, the customer was pleased with our safety, quality and performance in Phase II and awarded us Phase Ill. Phase Ill includes an additional 10 tanks and is now under construction. The final overall project will include a total of 31 tanks. Our creativeness and willingness to offer solutions to meet the customer’s needs made not only this phase of the work, but the overall project a successful one for us.

This tank was designed to store Urea Ammonium Nitrate (UAN) that is a heavy, corrosive, clear liquid with an ammonia odor that is used as fertilizer. The tank was designed, fabricated, erected and painted for a fertilizer plant and was put into service in October of 2014.

Due to the product it stored, the tank was designed as a double containment tank designed to the strict API-650 Standard. The tank consists of an inner tank with a storage capacity of 227,426 BBLS at 200 F. The outer tank acts as double containment vessel designed to contain 110% of the inner tank’s contents. The annular space between the inner and outer tank is protected by a rain shield which is an extension of the inner tank’s cone roof to the top of the outer tank shell. The dimensions are as follows; OT 174′ dia x 57′ high, IT 166′ dia x 65′ high.

This tank was built using a patented scaffold-less tank erection method that utilizes aerial work platforms to gain access to the tank throughout the duration of its erection.

To meet the customer’s needs, a welded steel tank with the proper coatings was selected as the material of choice to store this very corrosive product.

The Bayamon Terminal located in Bayamon, Puerto Rico needed to expand its terminal storage capacity by 870,000 barrels. The additional capacity would allow the terminal to store more fuel oil/diesel, diesel/gas, and jet fuel. A pipeline would then transport the products to the Port of Guaynabo in the Bay of Puerto Nuevo located northeast of the terminal.

As a central consideration to this project, Puma had commercial commitments that became a scheduling factor in the timely completion of this project. They needed several of the tanks to be ready for product before others were completed. With these concerns in mind, Puma Energy Caribbean hired a single source solution contractor to construct seven (7) aboveground storage tanks.

The scope of work consisted of the design, engineering, procurement, fabrication, and construction of seven (7) cone roof tanks and associated mechanical equipment. Additionally, the tanks were painted both internally and externally, and a cooling and foam system was installed. Two of the tanks had internal aluminum floating roofs (IAFRs), and three of the tanks had stainless steel internal floating roofs (SSIFRs).

Quantity, Capacity, Dimensions, Product

1 each – 150,000 bbls – 150’ dia. x 60’ high – fuel oil / diesel

1 each – 120,000 bbls – 120’ dia. x 60’ high – jet fuel

2 each – 120,000 bbls – 120’ dia. x 60’ high with IAFRs – diesel / gas

3 each – 120,000 bbls – 120’ dia. x 60’ high with SSIFRs – diesel / gas

Hydrotesting on the tanks was essential in order to comply with project requirements and the sequential delivery of the tanks according to the scope of work. The volume of water needed to accomplish this was large. Because the terminal is located on an island, suitable water was scarce, and a procedure was developed to manage the transportation of it to the individual tanks.

Construction began in April 2013 using a schedule that complied with the dates set by Puma. During the entirety of the project, Puma requested several scope changes that created concerns for the completion of the project on time. Another factor that affected the schedule was the weather with the rainy season causing delays in construction. In spite of these issues, the contractor was able to make the necessary modifications to the schedule to keep it on track. The entire project was successfully completed in April of 2014 on time and on budget.

As the United States becomes more and more energy independent, expanding the storage capabilities for crude and oil is critically important. We have been heavily involved in the expansion of crude storage in the largest expanding market in the United States, North Dakota.

The second major project that we have completed for Tesoro Logistics in North Dakota, the Johnson’s Corner, ND terminal represents 240,000 barrels of additional crude storage for the region (120,000 barrels per tank).

As bringing this project online was critical for Tesoro and the area, we had to build the foundations for the tanks in the winter of 2013 and mobilize for the field erection of the tanks themselves in January of 2014. This, of course, required working through the very difficult weather conditions in order to complete the project.

With the design and construction of two (2) ringwall foundations, cathodic protection systems for the tanks, and steel pontoon internal floating roofs for the tanks, as well as the tanks themselves, this project represented a major increase of storage capability.

In order to protect the tanks from the weather and the tank contents, the tanks received exterior coatings and 2 coats of epoxy phenolic on the interior.

“OUT WITH THE OLD, IN WITH THE NEW”

The University of Mississippi needed to replace the existing 300,000 gallon elevated tank on the Ole Miss campus with a new 750,000 gallon tank. The existing tank was a cut down, re-erected, lattice column supported and riveted steel tank originally fabricated in the 40’s, relocated to the campus in the 60’s and still in service until the new tank was placed in service.

The Chancellor of the University selected the new, modern “all steel” single pedestal elevated tank to architecturally blend in with the community and campus settings. The new elevated tank is artfully decorated with the University’s school colors and logos. As an “all steel” welded elevated potable water tank, it should last for decades providing years of continuous and reliable service.

The University and students are very pleased with the new and attractive addition to the campus.

This striking, unique and beautiful 1,250,000 gallon single pedestal spheroid supports over 10,400,000 pounds of water up over 118 feet in the air. The large load on poor soils required a complex foundation design using auger cast piles to adequately support the water load and tank.

The exterior graphics enhancing the tank includes a (6) color Pekin, ILLINOIS Logo underlined with several wavy blue lines representing the nearby Illinois River. The almost lifelike multi-colored flower and stem are inserted as the “i” in the Pekin lettering making it very eye catching. The Lettering and Logo were applied using the latest long lasting fluoropolymer paint system.

The tank also features a cathodic protection system, separate inlet and outlet riser pipes, a mixing system in the ball, controls in the base, provisions for future cellular cables and a roof handrail to support the antennas.

This Tank promotes and demonstrates: 1.) the flexibility of steel to be pressed and welded into smooth, double curved shapes and 2.) the aesthetics of a steel designed structure that the community is certainly proud of.

This owner’s branding effort is sealed across the city’s new water tower and the city is proud to have this new asset online and getting glorious feedback from their supporters. At over 189 feet in the air, its American Bald Eagle logo painted on multiple sides of the 86 foot diameter welded steel tank shouts “American Pride” to all around this very tight site, which is barely 120′ by 130′ of workable space prior to the 48 foot diameter support shaft built within this space. Not only is the site itself restricted, there is an active daycare and playground immediately to the east that had to stay in operation during construction, two streets under active construction with an overpass adjacent to the south, another busy 3-lane street and train yard neighboring on the west and the City of Jackson’s busy Midtown Center occupying the adjacent property to the direct north. In fact, these tight working constraints would not allow for any other style of tank at this capacity to be constructed on this site.

This colossal 1.5 million gallon Composite Elevated Water Storage Tank (reinforced concrete pedestal supporting a welded steel tank) all in total weighs more than 12 million pounds and promotes more than 265 tons of steel in the tank, shaft, foundation, and miscellaneous steel items like ladders, piping, and conduits. The entire 43,000 square feet of zinc-primed steel surface has two finish coats of epoxy on the interior and is finished off with Fluorourethane as the final exterior coat. One 16″ diameter and one 12″ diameter Stainless Steel inlet/outlet & overflow pipes take care of the vertical plumbing while the inside base of the shaft is used for the remaining valve work, controls, and storage.

The city was serious about their final look of this tank and revised multiple renditions of 3D renderings, sketches, mock-ups, layouts-over-actual-images, and other modelling to arrive at what they had us ultimately construct. The dome roof, less common and more difficult to design and build, was preferred because of the smoother architectural lines and flow with the surrounding buildings. This project went so well for the city that they were able to reduce or eliminate opposition for other tanks inside the city with similar site restrictions and unify their supporters.

Community Pride is what this 200,000 gallon Multi-column Elevated Tank clearly demonstrates. This all-steel elevated tank holds more than 1.7 million pounds of public water and proudly announces to all locals and visitors alike the town pride with its uniquely colored exterior Fluorourethane paint system and giant BOBCAT logos custom-designed by the school’s art teacher that are highlighted even at night by localized spotlights.

This tank, with its more than 115,000 pounds of steel in the foundation and tank, went from design to completed and holding water in a short 270 calendar days while overcoming some uncommon challenges. The tank had to be built in a location tucked very tightly in between existing ball diamond fields, at the back end of the school property, with no good access path to the tank site, and closely adjoins the neighboring property. Special construction staging and timing sequences had to be implored to not interfere with the town’s sporting events, disturb the environment immediately around the tank, or damage the expensive ball fields, stands, and equipment. The end result is a new tank promoting growing pride to improve their ball games and intimidate their visiting teams.

This Reedley, California community sure is proud of their new Sports Park Complex that has been a long-time coming. It has had a considerable amount of layout and forethought put into every aspect of the sports park complex’s design, including locating and focusing this 1,500,000 gallon Fluted Column Tank in the central hub of the new sports park complex footprint layout.

This all-steel elevated tank supports close to 13 million pounds of water alone and peaks at 155.5 feet in the air. Due to its California location, higher winds, seismic forces, and air quality checks/controls added to the design/implementation challenges of this multi-purpose fluted column tank structure. It has an inside elevator for public transport between multiple insulated floors which are fully circumferential on both the inside and the outside, as well as metal exterior canopies that provide shade and protection to patrons. There are multiple rooms inside for various uses (including eating, concessions, & announcing) plus a serious amount of electrical, SCADA, telemetry, piping, and valve work cleverly concealed from the public interface, a passive mixing system inside the bowl, and an all-metal roof handrail and antennae atop of the tank. A complete Cathodic Protection system helps fight against the coastal corrosive atmosphere, three all-steel vertical pipes run from grade to the interior bowl area, a full column-diameter steel condensate ceiling is above the occupied space, multiple internal landings serving as structural stiffeners up the column, and over six doors and entrances which all increased the design complexity of this super tank structure.

Thousands of design and construction man-hours were spent to successfully deliver this astounding tank on this site. These many design and timing challenges were all overcome to produce the community’s newest and finest public center of attraction that is as massive as it is useful and has the following noteworthy points:

-nearly 105,000 sq. ft. of total painted steel surface

-over 815 cu. yds. of concrete support the super tank structure

-665 tons of steel was used in the water tank and supporting structure

-over 400 ft. of 12 in. diameter steel pipes fill, drain, and properly overflow the tank

-a beautiful painted color logo adorns the peaceful exterior

This 66′ diameter potable water storage tank was designed, fabricated, constructed and coated in accordance with AWWA standards. The tank is welded steel construction and used approximately 95 tons of carbon steel (A36).

The project scope of work included the foundation design and construction as well as the design, fabrication, construction and coating of the storage tank. Also, a double stringer stairway was included in order to provide the Owner’s field personnel with easy access to the roof. Other design and engineering aspects of the project include a special decorative architectural feature on the tank exterior. The Owner requested that a distinctive architectural feature be added to the tank in order to enhance its aesthetic appeal. This design element was fabricated from carbon steel and painted to accent the exterior tank color.

Proper selection and application of the interior and exterior tank coating systems is key to a tank’s appearance, long term performance and value. A three coat NSF Standard 61 approved potable water epoxy coating was applied to the tank interior which will provide long term corrosion protection. On the exterior, a three coat zinc/epoxy/urethane coating system was applied which will also provide long term corrosion protection as well as excellent color and gloss retention. With routine inspection and maintenance, these coating systems will provide the Owner with many years of service.

Project scope included provided engineering, fabrication, erection and coating of two (2) 7.9 million gallon welded steel reservoirs. Foundation design for each tank required 449 concrete piles 60 to 65 feet deep, due to ground soil having extremely high liquefaction potential during a seismic event.

The project takes highly treated wastewater and purifies it through a three-step process that includes micro-filtration, reverse osmosis and ultraviolet light with hydrogen peroxide and then uses it to recharge the groundwater basin. It is the world’s largest advanced water purification facility of its kind prior to this expansion project, producing up to 70 million gallons of new water every day.

Each tank is 216 ft. diameter x 32 ft. shell height with a three bay roof structure. Construction of the two tanks utilized over 1,380 tons of steel. Both tanks were shop blasted and primed prior to field application of high performance 100% solids coating system on the full interior. It is estimated that the life-cycle of the tank coatings is 50 years.

Design, fabrication, construction and coating of the 3.1 million gallon Palmer Avenue Reservoir. The new reservoir was a much need addition to the small farming and industrial community of Coalinga, California. Planning for this new reservoir project began in 2012 culminating in completion of construction in 2014.

Overlooking the city from a hilltop location northeast of the city, a region that continues to be parched by California’s extended drought, this new reservoir provides much needed additional storage capacity allowing the city to take advantage of new water sources that could not be utilized without the additional storage capacity. To meet the state’s stringent water quality requirements, this new reservoir includes a mixing system to maintain the quality of the water delivered to the residents.

Project scope included engineering design, fabrication, construction and protective coatings for this 5.1 million gallon AWWA D100 tank. This water storage tank benefits the residents and businesses of Chino Hills and Chino. Additionally, the tank provides recycled water as an additional source for landscape irrigation use and groundwater recharge. This project will save approximately 90 million-gallons per year of drinking water by diverting those uses to recycled water, while helping to drought proof the municipality’s service area and keeping the cost of water low, providing a reliable source of alternative water. The hillside location of this project also required that 800 CY of soil to be moved to create a sound foundation for the tank pad.

Funding for this project has been provided in full or in part through an agreement with the State Water Resources Control Board and the Environmental Protection Agency.

On April 4th, 2010, a 7.2 magnitude earthquake struck north central Mexico southeast of Mexicali, just 35 miles from the City of Calexico, California. As a result of the earthquake, the City of Calexico’s water system suffered damage to its existing 1 million, 3 million and 4 million gallon water storage tanks. The initial assessment of the impaired tanks was to repair only the damaged areas. After careful review and analysis of the extent of the damage, the City of Calexico decided to build a new 6 million gallon tank and demolish the 1 MG and 3 MG tanks.

The existing 4 MG tank performed better under the seismic conditions than the other two tanks due to more recent construction to updated codes and more substantial freeboard. As a result, steel was chosen as the material of choice for the new 6.0 MG tank. Furthermore, the city determined that this approach was the most cost effective because the replacement cost was less expensive than the repair cost. The Water Tank Repair and Upgrade Project began construction on April 29, 2013.

Project scope included design, fabrication and construction of the 6.0 MG welded steel tank as well as structural repairs to the 4.0 MG existing tank in accordance with the latest seismic requirements of ASCE 7 and AWWA D100.

1,200,000 Gallon Reservoir

The Santa Margarita Water District imports its domestic water supply and is committed to its customers to plan and develop water infrastructure facilities to protect and enhance local supply reliability.

In response to this commitment, SMWD constructed the Middle Chiquita Canyon Water Facilities to provide the region with additional new storage capacity for its newly developed water sources. These new storage tanks provide the additional storage necessary to continue service when other portions of the district’s facilities are out of service for planned or unexpected outages.

The project scope includes design, fabrication, construction and interior and exterior coatings of (3) welded steel water reservoirs and appurtenances.

Zone 1 Reservoirs A & B (total values for each)

104′-0″ dia x 38′ – 0″ ht

Total Capacity: 4.2 million gallons

Tonnage: 384 tons

Thickness: 3/16″ to 7/16″

Zone A Reservoir

146′-0″ dia x 35′ – 6″ ht

Total Capacity: 4.1 million gallons

Tonnage: 343 tons

Thickness: 3/16″ to 9/16″

Design, fabrication and erection of 1.0 million gallon welded steel reservoir situated in a secluded mountainous area of Big Bear Lake City. Because of its location, the tank was designed to withstand a roof snow load of 100 pounds per square foot.

Construction at the 7000 foot site elevation was difficult and was made more challenging by the small construction site with limited access and native trees that required protection and preservation. The tank was constructed and coated in under three months to meet the district’s needs for added gravity storage for fire protection in this remote area.

We supplied the field erected tanks for the transformation of Cheniere’s existing liquefaction natural gas import facility to an export LNG facility. Awarded the nine (9) Process Tanks for Trains 1 & 2, completed in 2014, and Trains 3 & 4, to be completed in 2015, we are incredibly excited to be involved in the project.

One of only seven LNG Export Facilities to be approved to proceed by the federal government, this is the first LNG Export Facility to enter construction. As the first of many potential LNG Export Facilities to proceed, these tanks represent the start of a burgeoning new industry in this country.

The Sabine Pass site can readily accommodate up to four LNG trains capable of processing approximately two Bcf/d of natural gas. The nominal capacity of each liquefaction train would be approximately 4.5 million tons per annum (mtpa). The initial project would include two trains with liquefaction capacity of approximately 1 Bcf/d. A train is an individual processing unit of the plant. Each of the first two trains is capable of liquefying 500 million cubic foot per day of natural gas.

In 2014 we completed the first stage of tanks, which are described below:

(1) 110′ x 70′ Flat Bottom, Supported Cone Roof Tank

(1) 74′ x 56′ Flat Bottom, Supported Cone Roof Tank

(7) 27′ x 38′ Flat Bottom, Dome Roof Tanks

All tanks are carbon steel, with the exterior surfaces shop primed and field finish coated with three of the tanks (including the larger tanks) receiving epoxy novolac interior coatings.

With the process requirements of these tanks necessitating multiple sensors, mixers, and gauges, these tanks required significant amounts of shell and roof platforms. In many cases, the surface areas of these platforms exceeded the surface area of the roof.

A major water treatment plant

One of the upgrades at the Harry Tracy Water Treatment plant was the design, fabrication, field erection and coating of the new self-supporting umbrella roof tank.

The Harry Tracy Water Treatment Plant is located only 1,000 feet from the San Andreas Fault in San Mateo County, California. The plant, owned by San Francisco Public Utilities Commission, treats and delivers water to the people throughout the Northern Peninsula region on the western side of San Francisco Bay. It is also the only source providing emergency water to the San Francisco Peninsula.

In March 2011, the SFPUC initiated a major upgrade project to its facilities for increased resilience in the event of another major seismic event. The construction project includes seismic retrofits and electrical upgrades to enhance the plant’s treatment capacity as well as several new and replacement structures.

Included in the new construction for the treatment facility is this 0.5 million gallon sludge treatment washwater tank. Due to the proximity to the San Andreas Fault, seismic design values for this tank were substantially higher than similar projects not in such close proximity to the seismic hazard. As a result, in order to accommodate limited freeboard allowed for the structure, a torispherical roof design was utilized to withstand the sloshing wave pressures imposed on the roof.

Scope of the project included design, fabrication, erection, and interior and exterior coatings for the tank as well as the foundation engineering to include both sliding and uplift anchorage.

This standpipe serves a southern California community college as a thermal energy storage tank. Designed to store water chilled overnight when electrical rates are lower, and utilize that chilled water throughout the day to supply the campus’s cooling demand throughout the day. Utilizing this demand shift, this tank is anticipated to save the school district $190,000 annually which combined with the long life span of the welded steel structure will allow for the tank to pay for itself many times over with energy savings.

Not only designed in accordance with the already stringent California Building Code but this tank’s location on a community college campus initiated even more stringent oversight in all stages from design though commissioning. This required a lengthy plan review process by The Division of the State Architect, and third party inspection of all aspects of the fabrication and construction.

Constructing this tank as the second phase of a central utility plant upgrade created additional unique challenges for this project. Due to ongoing operations essential to keeping the campus running the worksite and laydown were extremely constricted. This allowed for crane access from one site only complicating lift plans and requiring special consideration by the design engineers for shell plate orientation to eliminate boom interferences.

Even though hidden amongst the campuses utility buildings it was decided to make the standpipe a decorative addition to the campus, though the use of two (2) courses of stainless steel fins surrounding the upper portion of the tank, to replicates architectural elements of other campus facilities. This required 128 individual support clips to be precisely laid out and welded to the tank during erection to allow the support structure to be bolted into position after the tank insulation was installed.

Constructed 260,000 gallon steel standpipe to replace existing concrete reservoir. Scope of work included demolition of existing concrete standpipe, site piping, excavation, site grading, backfill, concrete foundation, and constructing new steel standpipe with interior and exterior coatings. Special project requirements to coordinate temporary water main connection for minimum disruption to casino operations during low peak hours of operation.

Project scope included foundation excavation, concrete foundation with 91 tons of rebar and 1,000 yards of concrete, backfill, yard piping and vaults, standpipe fabrication and erection, field painting including logo, electrical, telemetry/control system, and asphalt paving.