Tag Archives: Wastewater Treatment

Struggle for clean water criteria coming to a close

The long-running controversy over Washington state’s water quality standards for toxic chemicals is nearly over. We will soon know just how pure the water must be to get a clean bill of health.

chinook

We still don’t know whether the Environmental Protection Agency will approve the new state standards adopted this week or impose more stringent standards that EPA developed for several key pollutants. The EPA has already taken public comments on its proposed standards.

“We believe our new rule is strong, yet reasonable,” said Maia Bellon, director of the Washington Department of Ecology, in a news release. “It sets standards that are protective and achievable. With this rule now complete, we will continue to press forward to reduce and eliminate toxics from every-day sources.”

For more than two years, much of the controversy focused on the fish-consumption rate — an assumption about how much fish that people eat. The FCR is a major factor in the equation used to set the concentration of chemicals allowed in water before the waterway is declared impaired. (See early discussions in Water Ways, Nov. 11, 2010.)

Initially, after plenty of debate, the state proposed increasing the FCR from 6.5 grams per day to 175 grams per day — a 27-fold increase. The initial proposal counter-balanced the effect somewhat by increasing the cancer-risk rate from one in a million to one in 100,000 — a 10-fold shift. Eventually, the state agreed to retain the one-in-a-million rate.

As I described in Water Ways last October, some key differences remain between the state and EPA proposals. Factors used by the EPA result in more stringent standards. The state also proposes a different approach for PCBs, mercury and arsenic, which are not easily controlled by regulating industrial facilities and sewage-treatment plants — the primary point sources of pollution.

PCB standards proposed by the EPA make representatives of industry and sewage-treatment systems very nervous. Water-quality standards are the starting points for placing legal limits on discharges, and EPA’s standard of 7.6 picograms per liter cannot be attained in many cases without much higher levels of treatment, experts say.

“Available data indicate that most state waters would not meet the EPA proposed criteria and that most (federally permitted) wastewater treatment plants will have to apply membrane filtration treatment and additional treatment technologies to address PCBs,” according to a letter from five industrial organizations and a dozen major businesses (PDF 3 mb).

Entities in Eastern Washington are in the midst of planning efforts to control pollution in the Spokane River, and major sewer upgrades are under consideration, the letter says.

“If Ecology were to follow the same approach on Puget Sound that it has on the Spokane River, this would amount to a range of compliance costs from nearly $6 billion to over $11 billion for just the major permits identified by EPA,” the letter continues. “A more stringent PCB criterion is also likely to impact how stormwater is managed, as PCB concentrations have been detected in stormwater throughout the state.”

For pulp and paper mills using recycled paper, the primary source of PCBs is the ink containing the toxic compounds at EPA-allowed concentrations, the letter says. Other major sources are neighborhoods, where PCBs are used in construction materials, and fish hatcheries, where PCBs come from fishmeal.

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The letter points out similar problems for EPA’s proposed mercury standard, calling the level “overly conservative and unattainable in Washington (and the rest of the United States), as the levels of mercury in fish are consistently higher than the proposed criterion.”

When water-quality criteria cannot be attained for certain chemicals using existing water-treatment technology, facilities may be granted a variance or placed under a compliance schedule. Both environmentalists and facility owners have expressed concern over uncertainties about how the agencies might use these approaches.

Despite the uncertainties, environmentalists and Indian tribes in Washington state generally support the more stringent standards proposed by the EPA.

“Tribes concur that water quality discharge standards are only a part of the toxic chemical problem in the state of Washington and that more efforts toward source control and toxic cleanup are needed,” writes Lorraine Loomis of the Northwest Indian Fisheries Commission. “However, the standards are an essential anchor for determining where and how to deploy toxic reduction efforts and monitor enforcement.”

When I said this controversy is nearly over, I was referring to a time schedule imposed this week by U.S. District Judge Barbara Rothstein, who ruled that the EPA missed its own deadlines for updating water quality criteria.

Rothstein, responding to claims from five environmental groups, imposed a new deadline based on EPA’s own suggested dates. Because the state has finalized its rule, the EPA now has until Nov. 15 to either approve the state’s criteria or sign a notice imposing its own standards. Checkout the judge’s ruling (PDF 494 kb).

The new criteria won’t have any practical effect until applied to federal discharge permits for specific facilities or in developing cleanup plans for specific bodies of water — although state inspectors could use the new state criteria for enforcing state laws if they discover illegal discharges.

If you want to dig a little deeper, view the full list of comments about Ecology’s proposal, many of which refer to the alternate EPA proposal as well. Ecology posts its information on its “Water Quality Rulemaking” page. EPA posts its information on the “Washington Water Quality Standards” page.

Manchester sewer plant leads the pack with another perfect score

A record number of sewage-treatment plants in Washington state fully complied with state water-quality requirements in 2014, with 128 plants winning the coveted Outstanding Performance Award from the Department of Ecology.

The number of sewage-treatment plants recognized for meeting all water-quality requirements grew from 14 to 127 over the past 20 years.
The number of sewage-treatment plants recognized for meeting all water-quality requirements grew from 14 in 1995 to 128 last year.

The awards program has reached its 20th year, and the Manchester Wastewater Treatment Plant in South Kitsap remains ahead of the pack. It’s the only plant with a perfect score every year since the program began.

In the first year of Ecology’s awards program, only 14 plants across the state were recognized as doing everything right, but that number has grown nearly every year.

Last year, 128 winning treatment plants — more than a third of all the plants in the state — passed every environmental test, analyzed every required sample, turned in all reports and allowed no permit violations.

“The talents of our professional operators are critical to successful plant operations and protecting the health of Washington’s waters”, said Heather Bartlett, manager of Ecology’s Water Quality Program, in a news release. “It is an honor to recognize their contributions with these awards.”

Kitsap County officials are rightly proud of the perfect record. Five years ago, in an article in Treatment Plant Operator magazine, lead operator Don Johnson said the success of the Manchester plant could be credited to the dedicated wastewater staff and support from all levels of county government. Don, who retired last year, has been replaced by Ken Young.

The magazine article may tell you more than you want to know about the design and operation of the Manchester plant. The plant was a modern facility when Ecology’s awards program was launched 20 years ago, and it has been kept up to date through the years.

Johnson stressed that treatment-plant operators should always be prepared for new developments.

“My advice is for them to remain adaptable and up to date,” he said. “There are many changes in the industry, and it’s important to pursue energy efficiency and create reusable resources.”

Reaching the 20-year mark deserves some kind of celebration for the Manchester plant. I would suggest organized tours of the facility, public recognition for all the plant workers through the years and maybe a slice of cake. So far, I’m told, no specific plans have been made.

A list of all the treatment plants in the state showing a history of their perfect scores (PDF 464 kb) can be downloaded from Ecology’s website.

Port Townsend’s treatment plant has had a perfect score for 19 of the 20 years, missing only 1997. Meeting the perfect standard for 16 of the past 20 years are two plants owned by the city of Vancouver — Marine Park and Westside.

Kitsap County’s Kingston plant has received the award for nine straight years. The county’s Suquamish plant, which is regulated by the Environmental Protection agency because it is on tribal land, has met all permit requirement for 15 years straight. (EPA does not issue awards.)

Port Gamble sewage plant to protect shellfish, recharge groundwater

The historic town of Port Gamble is about to get a new-fangled sewage-treatment plant, one that will allow highly treated effluent to recharge the groundwater in North Kitsap.

Port Gamble

The old treatment plant discharges its effluent into Hood Canal, causing the closure of about 90 acres of shellfish beds. After the new plant is in operation, those shellfish beds are likely to be reopened, officials say.

The new facility will be built and operated by Kitsap Public Utility District, which owns and manages small water systems throughout the county. The Port Gamble plant will be the first wastewater operation to be managed by the KPUD, which views the project as a step toward reclaiming more of Kitsap County’s wastewater by putting it to beneficial use, said manager Bob Hunter.

The PUD already manages the Port Gamble water system, which will undergo a future renovation, he said. Dealing with the community’s sewage is the next logical step.

“Nobody can do reclaimed water without the sewage-treatment part of the equation,” Bob told me, “and it seems potentially more efficient to have one entity do it.”

In a related development, the district is expected to ask Kitsap County voters for authority to own the plant as well as operate it. Under its current authority, the district can own water utilities but not sewer utilities.

A $2-million state grant to eliminate the discharge of sewage into Hood Canal requires that a public entity own the sewer system. To comply with that requirement, Mason County PUD 1 will take over ownership until Kitsap PUD obtains the needed authority, Bob noted.

The KPUD commissioners are expected to decide on Tuesday whether to place a measure on November’s ballot. Hunter said he doesn’t expect opposition, but he hopes to address any concerns people may have. The commissioners meet at 9:30 a.m. in their Poulsbo office.

The new treatment plant will be a membrane bioreactor, a type of filtering system capable of producing effluent close to the quality of drinking water. The plant, which comes assembled, will treat up to 100,000 gallons of sewage per day. That’s enough capacity to serve the existing homes in Port Gamble. And if the town’s redevelopment is approved (Kitsap Sun, Jan. 24, 2013), as proposed by owner Pope Resources, the plant could serve up to 350 homes — provided the old sewer pipes are replaced to reduce the amount of stormwater that leaks in.

The plant will be located on 1.3 acres near Carver Drive, south of Highway 104. Effluent will be pumped to a new drainfield at the top of a nearby hill. Eventually, water from the plant could be used to irrigate forestland or else lawns and ballfields in the town.

Construction is expected to get underway soon, with the system operational by May of next year. The entire project, including the treatment plant, pumping system, pipes, drainfield and site work, is expected to cost $5 million with most of the cost paid by Pope Resources.

The KPUD has no plans to operate other sewer systems at this time, Hunter said, but the district hopes to be in a position to respond to community needs, as it as done with failing water systems. Small sewage-treatment plants could be feasible where a lot of septic systems are failing, he noted, but state law precludes the use of sewers in rural areas except during a health emergency. Even then, the systems must serve only existing needs, not future growth, he noted.

Without snowpack, Kitsap Peninsula is entirely dependent on the amount of rain that falls on the peninsula. With limited storage, future water supplies can be bolstered by recharging the groundwater with high-quality sewage effluent or by using effluent to replace drinking water used for irrigation and industrial processes.

The Central Kitsap Wastewater Treatment Plant, which produces an average 3.2 million gallons of water each day, is undergoing a major upgrade to produce water that can be used for a variety of uses in nearby Silverdale. In preparation, Silverdale Water District has been installing a new piping network to bring the reclaimed water into the community.

“We have been talking for a long time about getting water into the ground instead of dumping it into Puget Sound or Hood Canal,” said Bob Hunter. “With this project in Port Gamble, we can learn and be prepared when other situations come along.”

Kingston wastewater could be valuable for watering golf course

Kingston’s sewage treatment plant could provide irrigation water for the nearby White Horse Golf Course and possibly other uses under a plan now in development.

Kingston Sewage Treatment Plant Photo courtesy of Golder Associates
Kingston Sewage Treatment Plant
Photo courtesy of Golder and Associates via ©Sky-Pix Aerial Photography, www.sky-pix.com/

Kitsap County commissioners recently signed a $325,000 “predesign” contract with Brown and Caldwell engineers. The firm was hired to answer a host of questions about the feasibility of producing high-quality effluent at the plant and then putting the clean water to good use.

“We’re just starting to look at the whole project,” said Barbara Zaroff of Kitsap County’s Wastewater Division. “We just had our kickoff meeting two weeks ago, and now Brown and Caldwell will be going out to collect data.”

I peppered Barbara with questions that she could not answer at this point, because the detail work is yet to be done. But we know from a previous study by Golder Associates (PDF 18.2 mb) that producing high-quality effluent in Kingston is more than a random thought.

Golder found benefits from using the water for supplementing flows in nearby Grover’s Creek while recharging much-needed groundwater in that area of the county. The Suquamish Tribe, which owns White Horse Golf Course, has expressed interest in acquiring the water if various issues can be resolved.

The Kingston treatment plant, completed in 2005, produces an average of 150,000 gallons of effluent per day, currently discharged into Appletree Cove. As population grows, the plant can be expanded to about 300,000 gallons per day.

It appears it would be cost-effective to treat the water to tertiary standards with sand filters, although other technologies will be explored. A pond could be built on or near the golf course, which would store the water for irrigation and allow infiltration into the ground. The available water should provide the needs of the course with plenty of water left over.

Discharging into a wetland that feeds into Grover’s Creek is another idea, along with providing irrigation at the county’s North Kitsap Heritage Park. Unused water might still be discharged into Puget Sound, particularly in winter months when irrigation water is not needed.

One question that always arises with reclaimed water is what happens to trace amounts of chemicals that pass through the treatment process, such as pharmaceutical drugs that mimic hormones. We know from studies that some of these chemicals can affect the growth, development and metabolism of fish in some situations.

An analysis by Golder Associates (PDF 18.2 mb) concluded that future treatment processes in the Kingston plant would remove between 80 and 97 percent of endocrine disrupting compounds coming into the plant. Environmental conditions where reclaimed water is discharged would degrade the chemicals further, so the overall risk would be low for salmon and other fish, according to the report.

The new study is expected to look further into the risks. Meanwhile, the state Department of Ecology is continuing to work on a new reclaimed-water rule that could improve permitting and monitoring by producers of reclaimed water.

The Kingston project would be similar to what is happening at the Central Kitsap Wastewater Treatment Plant near Brownsville, where construction is adding sand filters as part of an overall upgrade to the plant.

Work continues at the Central Kitsap Wastewater Treatment Plant File photo: Kitsap Sun, Feb. 4, 2014
Work continues at the Central Kitsap Wastewater Treatment Plant // File photo: Kitsap Sun, Feb. 4, 2014

The nearby Silverdale Water District has installed about 15,000 feet of “purple pipe” for reclaimed water on the major arterials of Silverdale, including Silverdale Way. The project is part of the water district’s major pipe-replacement project. Another 2,000 feet will be added as part of the Bucklin Hill Bridge project, General Manager Morgan Johnson told me.

Much of the new commercial construction in Silverdale is being designed to use reclaimed water for irrigation, and some buildings are being plumbed to use reclaimed water for flushing toilets and other secondary uses. Ballfields in the area could get some of the water.

A public-outreach program is being planned to educate the public about reclaimed water and to answer questions that people may have. Under the current schedule, the reclaimed-water valve would be turned on in 2020, but that date may be pushed back, Morgan said.

In Kingston, it will take about a year to put the information together and identify a preferred alternative, Barbara told me. Final engineering and design will follow under a new contract if things go as expected.

The current contract will examine pipeline routes to convey the water to the potential users. Costs for building and operating the system will be explored.

Yet to be determined is how costs and benefits of the reclaimed water will be shared between the county, which owns the treatment facilities, and those who will use the water. That goes for both Kingston and Central Kitsap.

Many golf courses across the country — especially in the arid Southwest — are using reclaimed water for irrigation. In a few places where water is in extremely short supply, water systems have begun adding the clean effluent straight into their drinking water. Check out reporter Emily Schmall’s story for the Associated Press.

While water is still somewhat plentiful in the Puget Sound area, it only makes sense to find uses for freshwater that would otherwise be dumped into salty Puget Sound.

Kitsap plans to reuse 3.5 million gallons of effluent

When I first reported that Silverdale Water District was preparing to install a system of purple pipe for water reuse, it seemed the district was far ahead of everyone else in Kitsap County. Recall my story in the Kitsap Sun March 31, 2008, and the Water Ways entry that followed on April 2.

A new headworks at the Central Kitsap Wastewater Treatment Plant is part of major sewer upgrade designed to reuse the efflent.

Kitsap County commissioners started talking to Silverdale Water District commissioners a couple months later. See Kitsap Sun from June 2, 2008, and Water Ways from June 3.

Now the county commissioners are about to approve a six-year plan to design and install equipment capable of producing 3.5 million gallons of highly treated effluent every day, as I reported in Sunday’s Sun. That’s a lot of water, enough to irrigate ballfields throughout Silverdale with water to spare.

Now the ball is in the court of Silverdale Water District. District manager Morgan Johnson told me today that if the district can be assured of getting treated effluent from the Central Kitsap Wastewater Treatment Plant, it will move forward on building a backbone of purple pipe right into the heart of Silverdale.

If the county commissioners on Monday approve the six-year sewer plan and move ahead with a $41 million bond issue, it will be time for county officials to begin negotiations with those from Silverdale Water District. Tying up all loose ends about how much water will be provided as well as who will pay for what will be necessary to create one of the largest water-reuse systems in the Puget Sound region.

Morgan Johnson told me that he was surprised at how quickly the county commissioners embraced the notion of reusing treated wastewater, starting with that meeting more than two years ago.

“I was surprised that they’re taking this approach as aggressively as they are,” Morgan said. “We just need to know what the county’s schedule is.”

The county commissioners keep saying they are quite serious about their year-old “Water as a Resource” policy. Every county department must report annually about how they are advancing the effort to save and reuse as much water as possible. In a sidebar to my main story Sunday, commissioners Steve Bauer and Charlotte Garrido talked about how this policy can protect the water resource while saving the county money.

Stella Vakarcs of the Kitsap County Wastewater Utility said she would like to hold a “water summit” that would bring water and wastewater officials together to discuss the future of the effluent.

In addition to the CK plant, county officials are considering uses for treated effluent from the county’s plant in Kingston.

Meanwhile, officials with West Sound Utility District, which already produces high-quality effluent near Port Orchard, are getting ready to use that water for irrigation.

It will take about a year to design the upgrades at the CK plant. Construction is planned to begin in the summer of 2012, and the system should be completed about 2016.

If things go well, the purple pipes could be in the ground by then and ready to be charged with reused water.