Recently, the San Diego County Taxpayers Association honored Helix Water District with a Golden Watchdog Award in Municipal and Educational Services for the district’s Tunnel Hill tanks project that resulted in a $6.3 million cost savings for its customers. The association’s annual Golden Watchdog and Fleece Awards recognize the best and worst in local government decision-making, spending and efficiency.
The Climate Registry has recognized Helix Water District as a Water-Energy Leader Gold organization after the district reduced its electric use by 15% and greenhouse gas emissions by 40%.
The Climate Registry made the announcement this month after the University of San Diego’s Energy Policy Initiative Center confirmed the district’s 2019 and 2021 total greenhouse gas emissions are 40% lower than those in 2009. EPIC’s findings were verified by a third party.
Helix achieved these reductions through a comprehensive lighting retrofit program, new lighting management system and an upgrade to the HVAC system at the district’s R.M. Levy Water Treatment Plant. Helix also transitioned its diesel fleet to 100% renewable diesel fuel.
A recent upgrade to a Helix Water District treatment plant saved money for its ratepayers while ensuring a continued supply of high quality drinking water. After 20 years of service, the ozone disinfection system at the R.M. Levy Water Treatment Plant needed an upgrade.
A recent upgrade to a Helix Water District treatment plant saved money for its ratepayers while ensuring a continued supply of high quality drinking water.
After 20 years of service, the ozone disinfection system at the R.M. Levy Water Treatment Plant needed an upgrade. The projected cost of outsourcing the work needed came to $3.5 million. Instead, Helix staff at the plant proposed doing the work themselves – and they did – saving an estimated 70% after the work was completed for $1.1 million.
“With infrastructure projects, we always start with two questions,” said Helix Water District General Manager Brian Olney. “Do we replace it or can we rehabilitate it? And, is it better to outsource the work or do it in-house? These two questions saved our customers millions of dollars this year and are a good example of how we continuously look for ways to save our customers money.”
The Helix Water District uses ozone generators to reduce the use of chlorine as a primary disinfectant. Ozone inactivates a wide range of microorganisms, needs little contact time with the water, and it eliminates most of the odor and taste issues some people associate with tap water. Photo: Helix Water District
Water treatment is a multi-step process. First, organic material suspended in the water is removed. Water is then disinfected to remove or inactivate harmful microscopic organisms. Finally, the water is filtered.
Chlorine is the most widely used disinfectant at conventional water treatment plants. The Helix Water District uses ozone as its primary disinfectant, supplemented with chlorine. Ozone inactivates a wide range of microorganisms, needs little contact time with the water, and it eliminates most of the odor and taste issues some people associate with tap water. This mix maintains the quality of the water while it makes its way through the water distribution system.
The treatment plant uses an ozone generator, which produces ozone by applying high amounts of electricity to oxygen gas. The oxygen molecules (O2) split and regroup as ozone (O3). The ozone gas then bubbles up through the water to inactivate any microorganisms present.
Helix maintenance staff worked closely with the manufacturer of its original ozone system installed in 2002. The same manufacturer supplied new hardware and electrical components required for the upgrade. The ozone disinfection system includes the gas feed systems, generators, power supply units, and the instrumentation hardware and software controlling the system.
The project began with a proof-of-concept pilot project two years ago. Once the methods were tested, each of the three ozone generators was upgraded with the new technology, then tested and commissioned.
In addition to the 70% estimated cost savings from the upgrade project, the improved efficiencies of the ozone generators will produce long-term cost savings.
The ozone generators and their power supply units are now fully upgraded thanks to the efforts of the Helix team. The last phase of the project is the replacement of the computer control system, which is scheduled for 2024.
(Editor’s Note: The Helix Water District is one of the San Diego County Water Authority’s 24 member agencies that deliver water across the San Diego region.)
A new 360-degree virtual reality video tour takes viewers through the planned East County Advanced Water Purification facilities. Participants are immersed in a guided tour of water facilities, where they can control their view by moving their computer mouse or smartphones to any direction in the video they want to see.
Viewers with a virtual reality headset for smartphones can take engagement one step further by stepping into the video. Locations visited in the virtual reality video tour include the Ray Stoyer Water Recycling Facility and the East County AWP Demonstration Facility in Santee, and Lake Jennings in Lakeside.
“Bringing this fun, easy to understand, and immersive tour to East County’s water and wastewater customers is an important and unique educational resource,” said Kyle Swanson, East County AWP director. “Prior to the COVID-19 pandemic, we averaged more than 1,000 people annually touring our facility, many of whom were eager students wanting to learn about this important water resource. This virtual tour helps to refill the learning need and will also be helpful while the East County AWP progresses towards the construction phase.”
Residents can participate in a guided virtual reality tour with a presentation and the opportunity to ask questions at 10 a.m., Tuesday, October 26. Sign up to reserve your place on the program’s Tours webpage.
Program representatives will also schedule opportunities for community groups, schools, and scouts to view the video using virtual reality goggles.
The East County AWP is a collaborative partnership between the Padre Dam Municipal Water District, Helix Water District, the County of San Diego, and the City of El Cajon. It will use sophisticated technology to provide 30% of current drinking water demands for East County residents. Photo: East County AWP
The East County AWP is a collaborative partnership between the Padre Dam Municipal Water District, Helix Water District, the County of San Diego, and the City of El Cajon. It will create a new, local, and sustainable drinking water supply using sophisticated technology to provide 30% of current drinking water demands for East County residents when it is completed in 2025, as much as 11.5 million gallons per day.
The program will use four advanced water purification steps to produce water that is near distilled in quality. After the advanced water purification process, the purified water will be blended with water in Lake Jennings and treated again at the R.M. Levy Water Treatment Plant before being distributed into the drinking water supply. The project eliminates the need to send most of East County’s wastewater to the City of San Diego’s Point Loma Wastewater Treatment Plant, where it is treated and then discharged into the ocean.
The Padre Dam Municipal Water District currently imports 100% of its drinking water supply. It treats two million gallons per day at its water recycling facility for irrigation and non-potable uses.
(Editor’s note: The Padre Dam Municipal Water District, Helix Water District, and the City of El Cajon are three of the San Diego County Water Authority’s 24 member agencies that deliver water across the metropolitan San Diego region.)
When the Helix Water District received contractor estimates as high as $3.5 million to upgrade the R.M. Levy Water Treatment Plant’s ozone power supply units and generators, it decided to perform the upgrade in-house.
With Suez Water Technologies provided engineering and equipment, Helix employees incorporated new technology and innovative installation practices. The proof of concept pilot project proved the feasibility of the new approach, and a full retrofit is now planned. The estimated upgrade costs to complete the full project is $1.1 million – an approximately 70% cost savings. The upgrade will extend the life of the power supply units and generators at least 15 years.
When the Helix Water District received contractor estimates as high as $3.5 million to upgrade the R.M. Levy Water Treatment Plant’s ozone power supply units and generators, it decided to perform the upgrade in-house.
With Suez Water Technologies provided engineering and equipment, Helix employees incorporated new technology and innovative installation practices. The proof of concept pilot project proved the feasibility of the new approach, and a full retrofit is now planned. The estimated upgrade costs to complete the full project is $1.1 million – an approximately 70% cost savings. The upgrade will extend the life of the power supply units and generators at least 15 years.
“The ozone project is our latest example of cost-effective local government,” said Brian Olney, Helix Water District director of water quality and system operations. “In early 2020, Helix staff also standardized the design, hardware, and software of the motor control centers in the district’s 25 pump stations, and that project also saved our customers money, and created long-term operating, maintenance and purchasing efficiencies.”
The ozone generator at Helix Water District’s R.M. Levy Water Treatment Plant in Lakeside. Photo: Helix Water District
The water treatment process at the R.M. Levy Water Treatment plant begins with the removal of dirt and other material suspended in the water. Ozone is then used to inactivate or destroy any organisms in the water. Ozone offers important advantages over chlorine:
Helix Water District’s ozone project team (pre-pandemic) in front of the rebuilt power supply unit. Photo: Helix Water District
Ozone is naturally unstable at normal atmospheric conditions, which is why Helix needs ozone generators to produce it on site. The high voltage generators break down oxygen molecules (O2) and form ozone (O3). The ozone molecules are then diffused in a contact chamber and bubble up through the water to destroy any organisms present.
After ozonation, Helix Water District filters the water and adds a dose of chloramines — chlorine and ammonia — to maintain water quality throughout its 737 miles of water distribution pipelines. The treatment process is managed by a team of highly trained plant operators who conduct 200 water quality tests per day. Chemists and biologists test water samples from both the plant and the distribution system as well.
A water recycling project that will purify treated wastewater into drinking water for East San Diego County is moving toward its completion date after the Helix Water District Board of Directors authorized the signing of water purchase agreements.
The East County Advanced Water Purification Project is a collaborative, regional effort to diversify the district’s water portfolio and provide a drought-proof supply. The water reuse project will further enhance reliability by purifying treated wastewater using Lake Jennings and other facilities.
The Helix Water District Board of Directors authorized its General Manager to sign water purchase agreements for the East County Advanced Water Purification Project at a special meeting on May 27.
The $681 million project, led by the East County AWP Joint Powers Authority, will recycle daily wastewater flows from Santee, El Cajon, Lakeside, Winter Gardens and Alpine. Treated water will undergo membrane filtration, reverse osmosis and advanced oxidation to produce water that is near-distilled in quality.
The purified water will be piped into Helix’s Lake Jennings before undergoing additional processing at the district’s R.M. Levy Water Treatment Plant and then distributed as safe, clean drinking water.
“I’m looking forward to the development of this project and I believe it’s an investment that strengthens our district’s water supply reliability and security,” said Helix Water District Board President Mark Gracyk. “This is a great example of what can be accomplished by working with our neighboring agencies.”
East County AWP project water will reduce east San Diego County’s dependence on imported water by almost 30% once full operations begin in 2026. The project will create a local supply for the East County at about the same cost as what Helix pays now for imported water, according to the Helix Water District.
San Diego County water agencies, including Helix, Padre Dam, and the cities of San Diego and Oceanside, are developing or expanding water recycling projects. Diversifying local supply sources remains a priority for the San Diego County Water Authority. Imported sources, including water from the Colorado River and State Water Project, can be cutback during times of drought.
“The project was conceived by JPA members as a way to reduce rising wastewater costs for their customers,” said Helix Water District General Manager Carlos Lugo. “For Helix to participate, the project had to make financial sense for our ratepayers as well. By expanding our local supply, the East County AWP project water will help ensure that we are better able to navigate future droughts.”
The 30-year purchase agreements establish the cost and quantity of water that Helix will purchase from the East County AWP JPA under the proposed project.
An artist’s rendering of the new East County Advanced Water Purification Facility. The water recycling project is a partnership between Padre Dam MWD, Helix Water District, San Diego County and the City of El Cajon Graphic: Courtesy Padre Dam Municipal Water District
Helix and the JPA members – Padre Dam Municipal Water District, San Diego County Sanitation District and the City of El Cajon – have been working together to evaluate the ECAWP plan since 2014. Each JPA member has until 2021 to make a final decision on the feasibility of the project and participation.
Helix has invested $850,000 and significant board and staff resources to study the feasibility of the project, including a tracer study with Scripps Institution of Oceanography to learn how water moves and mixes in Lake Jennings.
“We are committed to exploring sustainable projects that benefit our customers,” said Gracyk. “The ECAWP project will be a great complement to our other ongoing investments in regional water supply projects, such as the Carlsbad Desalination Plant, to ensure we have enough water to meet demand.”
The Helix Water District Board of Directors authorized its General Manager to sign water purchase agreements for the East County Advanced Water Purification project at a special meeting on May 27, 2020.
May 22, 2020, Santee, CA – The East County Advanced Water Purification (AWP) Joint Powers Authority (JPA) Board of Directors unanimously approved water and wastewater service agreements this week, moving this significant drinking water project one-step closer to reality. These water and wastewater agreements are critical to the JPA’s eligibility for key Program financing opportunities.
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