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[Water_news] 4. DWR'S CALIFORNIA WATER NEWS: WATER QUALITY - 3/26/07

Department of Water Resources

California Water News

A daily compilation of significant news articles and comment

 

March 26, 2007

 

4. Water Quality

 

LAKE SAN MARCOS WATER QUALITY:

Water quality quandary: Opinions mixed on cleaning up Lake San Marcos - North County Times

 

DRINKING WATER OPTIONS:

FPUD explores its options at Red Mountain Reservoir - North County Times

 

REGULATION:

Price of pollution: $10K a day; Norco responds to audit citing storm water program violations - Inland Valley Daily Bulletin

 

AG WATER QUALITY ISSUES:

Water quality regulations too burdensome; Attorney speaks during Agriculture week with farmers - Woodland Daily Democrat

 

STORM WATER PLAN:

Murky pollution rules disappoint - San Luis Obispo Tribune

 

RUNOFF ISSUES:

Water district targets runoff from homes; Effort plans to reduce pollutants in the Malibu Creek Watershed - Ventura County Star

 

ALGAE ISSUES:

The battle against algae at Lake Hennessey - Napa Valley Register

 

 

LAKE SAN MARCOS WATER QUALITY:

Water quality quandary: Opinions mixed on cleaning up Lake San Marcos

North County Times – 3/25/07

By Ned Randolph, staff writer

 

LAKE SAN MARCOS ---- Algae plumes, thick silt and ammonia found in tests by the Regional Water Quality Board are evidence that the quality of water in Lake San Marcos is deteriorating.

Viewed as the jewel of this unincorporated retirement community when it was built in the 1960s, the 80-acre lake absorbs the valley's entire watershed, including the motor oil, fertilizer, garbage, cigarette butts, pet waste and silt that get washed into it.

 

It is the passive recipient of the valley's storm drains, which deliver untreated water directly into San Marcos Creek, down to the lake and eventually the ocean.

 

Lake San Marcos residents disagree about how the lake should be cleaned up, or at least maintained, and the issue has gotten bogged down by the size of the problem and uncertainty about who is responsible for the pollution and for cleaning it up.

Both Lake San Marcos and the San Marcos Creek that flows into it were recently listed under the state Clean Water Act as "impaired" water bodies, meaning that pollutants have reduced the ability of people or wildlife to use the water.

Getting listed is the first step toward establishing costly and long-range cleanup plans.

"That's the first step that we as a regional board take to identify a problem," said Chiara Clemente, watershed supervisor for the water quality board. "Then we do an analysis to figure out the sources (of pollution). Then we figure out what pollution level it needs to be at."

Such action is not scheduled by the water board until 2019, which prompted concerned residents to test the lake's water quality themselves. About four residents have been trained by San Diego Coast Keeper, a nonprofit organization, to take water samples and have them analyzed at a University of San Diego lab.

The bulk of the results have not returned from the lab, says San Diego Coast Keeper program director Karen Franz. But other samples taken by residents and sent to a private lab, called EnviroMatrix, reveal a high level of chloroform near Discovery Street Bridge, said Lake San Marcos resident Fran Geneau.

"We're going to keep testing, but we did note a spike in chloroform in that area," she said.

Geneau said she does not know the source of the chloroform, but it generally comes from industry-related waste, such as sanitary landfills and hazardous waste sites, according to the Environmental Protection Agency. It attacks the central nervous system and is listed by EPA as a possible cause of human cancer.

Difference of opinion

Some Lake San Marcos residents, such as Geneau and others, view with skepticism activity by the city of San Marcos upstream. They are especially wary of an ambitious plan by the city to erect a billion-dollar downtown development along the creek.

"Sometimes people forget that we ... are in their neighborhood plan," said Lake San Marcos resident Marianne Plank, who along with Geneau is part of a group called the Lake San Marcos Task Force. "What the (city) does impacts us, but we really don't have a lot of legal input. We don't vote for anyone except the school board, so we have to work with the regulatory agencies.

 

And we are very concerned about stormwater."

Bob Kreis, a member of the Lake San Marcos Community Association and until recently its president, sees things differently. He is one of three Lake San Marcos representatives on the San Marcos Creek Task Force and believes that flood-control measures planned for the creek project will actually improve the water flowing into the lake.

"Lake San Marcos is just the wide place in the creek. It unfortunately becomes a sediment basin for a lot of the creek because there's no real control of the flooding," he said.

The city's creek project, he said, will help control flooding. A series of silt basins ---- a large one at Discovery Street Bridge ---- and smaller ones at various crossings, will also help control sediment overflow, city officials say.

"Whatever the city does, they will have to do in accordance with the rules not only of the (county) Water Quality Control Board, but also the state, the (Army) Corps of Engineers ---- all of those agencies that get involved," Kreis said, noting many agencies that will have to sign off on the project.

"The city spent a lot of money on the plan for consultants and hydrology studies to know what's going on there. And the city realizes that they have to take care of it."

City's goal

When the city first proposed the creek project several years ago, the plan was to pave the creek bottom. City Manager Paul Malone has said he's glad the city failed to convince regulatory agencies because there is still an opportunity to enhance the natural creek bed.

"I've already made a commitment in the district that it will be a model of stormwater management," he said. "We have an opportunity to do it from day one because we're starting from the ground up."

The city's plan envisions a downtown of restaurants, shops, condos and office buildings along the two miles of the scraggly creek bed between Highway 78 to the east and Discovery Street to the west.

Designs presented to the citizens task force show a wide channel and levees to the north and south that would prevent flooding. The creek itself meanders through chaparral and riparian habitat back and forth within a 300 to 400 foot wide channel.

"We view the creek district as an opportunity to create something on many levels, and environmental (quality) is one of them," said Malone. "It's an all-natural creek, which is unique in that regard in San Diego County."

People would not be allowed into the protected channel, but would be able to view it from scenic overlooks, foot bridges, trails and a linear park on south side of the creek.

"I think the fundamental approach here, to organize a downtown district around a wide, all-natural channel, speaks pretty loudly to the environmental issues or what we intend there," he said.

Present conditions

In San Marcos, the creek is now a virtual no man's land, littered with plastic cans, jars, appliances and garbage. At Discovery Street Bridge, where it flows into Lake San Marcos, the waterway is filled with decaying debris and emits a dull, putrid odor.

"One of the problems that the city faces is that a lot of that property (that borders the creek) is privately owned," said Kreis. "You can drive a pickup truck with a load of trash and unload it there if you want. The city has ordinances against dumping, but they're difficult to enforce."

During heavy rains the illegal waste washes downstream. And sometimes, so does raw sewage.

The Vallecitos Water District three years ago had three separate sewage spills during heavy rains that overflowed manhole covers near Discovery Street Bridge.

The problem is that some people illegally hook their stormwater drains into the Vallecitos sewer system, which is designed to handle only "domestic" waste from individuals ---- not gutter lines or other outdoor drainage lines, said Bill Rucker, executive director of the Vallecitos Water District. The rains overwhelmed the system and caused the spills, he said.

"There are those individuals that believe those three spills polluted the lake and this agency should be responsible for cleaning up the lake," said Rucker. "There are others that recognize that it has been a sinkhole at the end of 50 square miles of area for six decades."

The lake has absorbed runoff from the region's early chicken ranches, dairies, and now modern emissions, Rucker said.

"In 60 years, I doubt there's been a dozen times that the dam has overflowed. All those concentrates are still in there."

Since the spills, the water district has been trying to add capacity for stormwater drainage, but has been held up by regulatory hurdles, Rucker said. The district is also planning to increase capacity of the storm drains in the creek area, but is waiting on the city's construction schedule.

Leadership role


The spills three years ago started a wider dialogue about protecting the lake. Lake owner Citizens Development Corp. was trying to raise money to take legal action against polluters or to provide a cleanup program for the lake, said former CEO Erik Richard, who said he helped form a Lake San Marcos Task Force.

"I had envisioned a task force sponsored by CDC with the backing and credibility and clout of the organization that ran the lake," Richard said. "The (task force) would be made up of members of the community that had time to put into it."

Things didn't quite work out, Richard said. What ended up happening, he said, was that the task force went off on its own.

Then there were disagreements between the task force and the Lake San Marcos Community Association led by Kreis, Richard said.

"It was hard for them to change each others' opinions. Members of the task force wouldn't communicate with the community association," he said. "You could never get them to walk in lock step --- I lived that on a daily basis."

He said the city assured him that many of the lake pollution issues would be addressed by the creek project, and the city added three seats from Lake San Marcos to the creek task force.

"They talked about improvements they were going to make that would help downstream," Richard said.

"But rightfully so, members of the community question what the intention of city is and they should," he said. "The city has an obligation to sell their plan to those affected by it."

Richard left Citizens Development in November for another job. Little has since been done publicly by the company on water-quality issues.

Victoria Boynton, legal counsel for Citizens Development Corp. and a member of its parent organization, La Jolla Development Group, said that Citizens is "exploring a variety of different avenues to try and improve the quality of the lake."

She would not elaborate, but there is speculation among Lake San Marcos Task Force members that Citizens Development Corp. is meeting with environmental attorneys to discuss legal action.

"I think everybody in the community thinks something should be done," she said. "Everyone is concerned about the quality of water in the lake. I think we're in strategy mode right now, trying to figure out where all the players should be positioned."

Environmental attorney Marco Gonzales, who works with the nonprofit San Diego Coast Keeper, said he expects a gathering of different parties to address the lake's water quality issues as early as this summer.

"I think you're likely to see the underlying owner and stakeholders getting together to question activities of surrounding legislators ---- the school district, the county and city ---- and likely to see an effort to clean up the lake and stop spills," he said.

 

"I think they realize between Coast Keeper and themselves, there is a synergy to clean up the lake, protect property values, and provide an incentive to get polluters to pay their way." #

http://www.nctimes.com/articles/2007/03/25/news/inland/22_22_513_24_07.txt

 

 

DRINKING WATER OPTIONS:

FPUD explores its options at Red Mountain Reservoir

North County Times – 3/25/07

By Tom Pfingsten, staff writer

 

FALLBROOK ---- In trying to obey a new Environmental Protection Agency rule, the Fallbrook Public Utility District may begin shining ultraviolet light on some of its water, officials said last week.

District engineers said they hope that zapping water flowing out of Red Mountain Reservoir with ultraviolet rays will fulfill the requirement ---- enacted in January 2006 ---- that water agencies treat drinking water after it has been stored in an open reservoir.

 

Currently, the water that comes out of Red Mountain Reservoir is only treated with chlorine, which does not meet the rule's requirements, officials said.

 

The conventional method of treating drinking water to meet the new standard would require building an expensive filtration plant, a project that "could run into the tens of millions of dollars," according to the district's chief engineer, Joe Jackson. The ultraviolet system would still be costly, but only a fraction of a filtration plant's price tag, he said.

Red Mountain Reservoir was originally built as an emergency source of drinking water, and is used to supplement the daily flow of water the district buys from the San Diego County Water Authority.

Jackson said the district does not yet have an estimate on how much the ultraviolet technology would cost.

As an alternative, the district could put a cover on the reservoir, but with a 22-acre surface area and 450 million-gallon capacity, officials said that's out of the question.

So they have turned to ultraviolet technology, which would kill most harmful microbes using a much cheaper facility that could be in place within two years. District General Manager Keith Lewinger said that he recently asked the California Department of Health Services to respond to the proposal by Saturday.

"That will allow us to work it into our budgeting process for the next fiscal year," Lewinger said. "We're hopeful they will respond soon, so that we can budget and move forward with this project."

Redundancy asserted, to no avail

Water distributed from the district's vast Red Mountain Reservoir has never violated quality standards, so local water officials objected to the new rule at first, saying that more treatment of water that is already clean would be redundant.

But the district cannot get around the provision, called the "Long Term 2 Enhanced Surface Water Treatment Rule."

The district has until 2012 to put some sort of system in place, Jackson said.

"But it always pays to be out ahead," he said. "The number of things that can go wrong exceeds the imagination."

Jackson said ultraviolet disinfection systems are already in place elsewhere in the United States.

"Along with the rule, (the EPA) published a guidance manual for UV disinfection, which sets up the design of the system," he said. "So it's an accepted technology, but it requires specific approval of the (state Department of Health Services)."

The state health department has been assigned to enforce the rule, and has not yet responded to the district's proposal.

State officials did not respond last week to questions concerning the Fallbrook district's proposal or the new water treatment standards.

Lewinger pointed out that, once the district has installed the ultraviolet technology, water delivered from Red Mountain will have been treated numerous times by three different agencies using various methods.

"It's going to provide extremely disinfected water to our customers," he said.

How it would work


Red Mountain Reservoir is used as a backup to the aqueduct from which the district draws most of its water on a daily basis, said Jackson.

During peak daytime hours, the district buys water from the San Diego County Water Authority's aqueduct, and simultaneously draws some from Red Mountain. Then, at night, any water taken from the reservoir during the day is replaced.

Water stored in the reservoir is currently treated with chlorine before it is piped to customers, and that would not change if the ultraviolet technology is put in place, Jackson said.

The water would simply be run through a tank and exposed to UV wavelengths that are highly effective at killing multicell pathogens, such as giardiasis and cryptosporidium, which cause intestinal illnesses in humans.

Chlorine would still be added to kill viruses and anything else still alive.

In December, the district's board of directors approved a contract with Santa Monica-based consulting firm McGuire-Malcolm Pirnie to explore the idea of ultraviolet treatment at Red Mountain Reservoir.

In December, Lewinger said that the firm's services would include designing the system if the state approves the ultraviolet technology. In that case, he estimated the district will owe the firm about $300,000.

If the proposal is not approved, he said, the cost for having McGuire-Malcolm Pirnie explore the idea will be around $100,000.

While the final cost has not yet been determined, Jackson said the district plans to set aside money in its 2007-08 budget for designing the system, and more in the 2008-09 budget for construction. #

http://www.nctimes.com/articles/2007/03/25/news/inland/fallbrook/22_17_643_24_07.txt

 

 

REGULATION:

Price of pollution: $10K a day; Norco responds to audit citing storm water program violations

Inland Valley Daily Bulletin – 3/23/07

By Andrea Bennett, staff writer

 

NORCO - The city has sent its official response to a state water board audit report in hopes of dodging fines of up to $10,000 a day for violations.

 

The Santa Ana Regional Water Quality Control Board criticized Norco in the report issued this past month for deficiencies in its storm water program - a requirement of a permit Norco last renewed with the board in 2002.

 

The program is meant to reduce pollution that ends up in city storm drains and flows into the Santa Ana River, affecting aquatic life, state officials said.

 

The 22-page report stated that unregulated and unmanaged animal manure, waste from industrial and construction sites, and the erosion of horse trails and hillsides in Norco were among the major causes for concern.

 

City Manager Jeff Allred said Norco has been working to address these areas with, for example, the use of noneroding trail materials and the creation of a committee to study manure management in town. The group met for the first time this past week.

 

The water board gave Norco a deadline of March 21 to respond to the report and draft a schedule and program that will bring the city back into the agency's good graces.

 

Allred said Norco's 14-page response Tuesday included a few areas in which the city has been working that the board overlooked.

 

"We made it clear what we are doing, and we're doing quite a lot in those areas," Allred said.

 

Norco's response also recognized areas that need improvement.

 

The city has to develop a tracking system to inspect businesses to ensure there is no pollution of storm water runoff and create a site-specific Urban Runoff Management Plan, the response stated.

 

Norco officials plan to study the difference in levels of debris in areas without curbs versus those that have them, and curbs are being installed in older areas of town.

 

Allred said the city still plans to strengthen its codes and develop policies and procedures to meet the various requirements.  #

http://www.dailybulletin.com/search/ci_5501597

 

 

AG WATER QUALITY ISSUES:

Water quality regulations too burdensome; Attorney speaks during Agriculture week with farmers

Woodland Daily Democrat – 3/25/07

By Jim Smith, staff writer

 

All the water quality regulations in the world won't do any good if those regulations are so burdensome as to put farmers out of business.

 

That was the message delivered at the 27th Annual Farm City Festival breakfast in celebration of National Agriculture Week Friday morning hosted by the Yolo County Farm Bureau.

 

Theresa Dunham, an attorney with the firm of Somach, Simmons & Dunn in Sacramento, who specializes in water quality law, told about 60 farmers, business representatives and elected officials it's becoming harder to farm as a result of new and old anti-pollution requirements.

 

She has a sympathetic audience in Farm Bureau President Joe Martinez, during the breakfast meeting at the Woodland Hotel, who expressed his frustration with water-quality requirements and other land-use regulations.

 

Martinez said those rules are making it more difficult for the traditional family farm to exist. He farms 2,000 acres, but actually owns 100 and finds it harder each year to do his job.

 

"If you can't farm it," he said of the rules under which he works, "why protect it?"

 

Dunham said her own roots run deep in the region, recalling when she was raised in Colusa County and a member of 4H and FFA. That experience has given her insight since becoming an attorney in 1996 and deciding to specialize in water-quality issues.

 

The water quality programs, she said, made sense initially as a means of protecting the environment, but improvements in technology coupled with the fees necessary to provide regulatory oversight are threatening the livelihood of farmers.

 

"I don't think we as policy makers have thought about" the effect of even more stringent water quality legislation, she said. "I know the farmers have."

 

"We have these programs," she said, "with the cost almost exclusively born by farmers."

 

"This is a cost totally born by agriculture which has no effect on the quality of food," she emphasized. "It's purely the cost for doing business."

 

Dunham said she knew of no other state or country with such programs in place. They present tremendous challenges for farmers who are competing against other growers in the United States as well as the world market, she said.

 

Additionally, state water compliance standards are also very strict.

 

When initially put in place in 1975, she said about "zero detection" levels of pesticides in farm-water runoff, the technology only measured pollutants at "parts per million." Today, tests can detect contamination at parts per trillion, yet that "zero" contamination level remains.

 

Dunham said such risk factors need to re-evaluated. Are these strict standards necessary, or even desirable, she questioned. Perhaps so, but maybe such stern standards are unnecessary and unachievable.

 

Additionally, it may be that factors outside of farming are affecting ground water quality. Simple things, such as water running through plastic piping, temperature, oxygen content and algae could all affect water cleanliness as it runs off the fields.

 

The "highly engineered" systems in place to deliver water might not be the problem of agriculture, but growers are paying for their effects, she said.

 

For example, she said, Yolo County growers know not to use surface water because it has high levels of boron. That boron is detectable and could result in filtration before being released back into a river or stream. That filtration costs the farmer, the city or a community under state rules, but it's already present in the water.

 

"It's about viability," Dunham said, the ability to keep a farm economically competitive.

 

"We do need to be aware of how we impact the environment and how we impact water quality ... We're trying to educate people more on pesticides and how to control runoff ... but we need to step back and ask, what are the long-term goals? What are the long-term impacts."

 

Farmers, she noted, are asking how they're going to be able to keep doing the same things are now in five or 10 years when the economic situation is even more competitive.

 

She herself has no answers other than a confidence that the costs to California agriculture are going to increase. #

http://www.dailydemocrat.com/search/ci_5519429

 

 

STORM WATER PLAN:

Murky pollution rules disappoint

San Luis Obispo Tribune – 3/24/07

By David Sneed, staff writer

 

Despite a lack of specifics, state water officials Friday begrudgingly approved San Luis Obispo County’s storm water management plan.

 

The board voted 5-2 to allow the county to implement its plans to reduce the amount of pollution that reaches the county’s creeks, lakes and the ocean. The plan is four years in the making and calls for the county to spend $1.64 million in the first year to clean up runoff.

 

Most of the water board members and many of the environmentalists who spoke at the hearing said they were disappointed in the lack of detail in the county’s plan.

 

The county is allowed five years to implement the plan, and specifics about pollution control programs will be filled in during that time, said Jill Falcone, who coordinates the county’s runoff management program.

 

She called the plan a dramatic improvement over the existing rules and urged the board to approve it immediately.

 

"To delay implementation because someone doesn’t trust the county is inappropriate," she said.

 

Most of the environmental groups in the county as well as some larger ones from out of the area decried the lack of specifics and urged the county to adopt a runoff plan similar to a stricter one in place in Monterey County.

 

Steve Shimek, executive director of the Otter Project, based in Marina, said the county’s intent is good but it needs to flesh the plan out with more measurable guidelines.

 

"This is a plan to develop a plan," he said.

 

A majority of the water board members said they were tempted to send the plan back to the county for more work. But they approved it with direction to their staff to update them on its implementation a year from now. #

http://www.sanluisobispo.com/mld/sanluisobispotribune/16966301.htm

 

 

RUNOFF ISSUES:

Water district targets runoff from homes; Effort plans to reduce pollutants in the Malibu Creek Watershed

Ventura County Star – 3/25/07

By Teresa Rochester, staff writer

 

People of Agoura Hills and Westlake Village, your sprinklers runneth over.

 

In fact, 43 percent of homes in the Malibu Creek Watershed overwater.

 

All that water is running off properties — laced with zinc, copper, nickel and arsenic — and flowing into tributaries that feed Malibu Creek, where people swim, fish and camp and wildlife calls home.

 

The Los Angeles Regional Water Quality Control Board puts limits on the amount of chemicals flowing into the creek, and the Las Virgenes Municipal Water District, which provides water service to the communities, has launched a free program to help residents curb runoff.

 

A district employee can be dispatched to a customer's home for an inspection. A detailed list of any problems and recommended solutions is left with the customer. The customer can then make all or some of the repairs and present his or her receipts to the district for refunds of up to $500. A follow-up inspection is also conducted, and water use and runoff are monitored for two years.

 

The program, funded by a grant from Proposition 13, passed in 2000, has been slow to get off the ground. The district's goal is to have 100 participants in the Malibu Creek Runoff Reduction Project by December.

 

"We're doing a full court press to advertise it," said Randal Orton, the district's acting director of resource conservation and public outreach.

 

Orton and the district have turned to the cities they serve for help in getting the word out.

 

Officials with the city of Agoura Hills did not return calls for comment.

 

In Westlake Village, however, engineer Roxanne Hughes, who serves as the city's storm water program manager, said the city helped the district with the grant to fund the program.

 

The city also provided the district with a contact list for all of the homeowner associations' presidents, and an article about the program will appear in the city's next newsletter, Hughes said.

 

Westlake Village resident Fred Rosenberg learned about the program through a flier in the water bill.

 

Rosenberg implemented some of the suggestions the inspector made and installed bubbler sprinklers for his tomatoes and roses.

 

He also bought a smart timer for his regular sprinklers, which shuts off the system when it rains. Some of the brush on his property was cut back, and some sprinkler heads were replaced.

 

Rosenberg will be honored as the program's first refund recipient at a check ceremony this week.

 

"It's just a wonderful idea," Rosenberg said. "We just had regular sprinklers, and they were just going all over the place and hitting the fence."

 

Thanks to technology, the district can pinpoint where runoff is happening. Officials have discovered that most of the older neighborhoods have less runoff, while newer neighborhoods, where landscapers working for homeowners associations may be too enthusiastic with watering common areas, have more offenders.

 

Overall, the district has found that one in four homes has runoff issues. The biggest cause is irrigation.

 

The Los Angeles Regional Water Quality Control Board is happy with the district's plan. Fran Diamond, the board's chair, said the Malibu Creek Watershed is one of the region's most important and beautiful water bodies.

 

"It's very important," Diamond said, "and it's a very good thing they are doing."

 

Orton said he believes the program will be a success.

 

"The cities are highly motivated to solve this at the source," he said. "It all comes down to the residents." #

http://www1.venturacountystar.com/vcs/county_news/article/0,1375,VCS_226_5442013,00.html

 

 

ALGAE ISSUES:

The battle against algae at Lake Hennessey

Napa Valley Register – 3/24/07

By Julissa McKinnon, staff writer

 

As the days grow longer and temperatures rise, green goo is multiplying somewhere in the shallower depths of Lake Hennessey -- the city of Napa's drinking supply.

While some algae growth is inevitable, reservoir regulators are hoping the bloom won't be big enough to warrant any algae-killing chemical treatments this year.

Last year no algae combatants were needed because the aquatic plant didn't reach dangerous levels, according to Phil Brun, general manager of the city's water division.

Besides sparing the drinking water another round of chemicals, the low algae count was a boon to the city for other reasons.

 

Last year the water division was caught in a bind after a local environmental group, Earth Defense for the Environment Now, contested the health and safety of the use of copper sulfate -- the city's tried-and-true algaecide for Hennessey.

 

EDEN based its assertion on the fact that short-term exposure to copper can lead to gastrointestinal distress, and long-term exposure causes liver or kidney damage, according to the U.S. Environmental Protection Agency.

Like other heavy-impact pollutants, copper accumulates in higher and higher concentrations as it moves up the food chain, and eventually can lead to declines in fish and frog populations, according to several scientific studies.

In response to the environmentalists' concerns, the city's water officials started looking into an alternative algae-killer, PAK-27 -- a new chemical with potentially less environmental impacts, according to Brun.

But EDEN has since raised concerns about the PAK-27 solution precisely because it's an unknown quantity, according to EDEN spokeswoman Chris Malan.

"We have to hire experts, of course," Malan said. "Any kind of chemical in the watershed can be a problem but if we're going to protest anything we have to have experts to tell us what the impacts are."

She added that reviewing the city's environmental impact studies about PAK-27, which would satisfy the California Environmental Quality Act, could be a starting point to investigate the new algaecide, if and when the city files them.

"They didn't file CEQA documents on the copper sulfate," Malan said, pointing to the basis on which EDEN contested the city's use of copper sulfate in the first place.

Last year, when the city went to file a negative declaration for copper sulfate -- a document that would excuse them from conducting a full environmental impact study by stating that copper sulfate has little to no environmental impact -- EDEN protested. That's when the city halted its use of copper sulfate entirely, and the question of how to deal with the algae surfaced.

It has yet to be determined what the city's solution will be if and when Hennessey's algae gets to be too much.

In the past, EDEN has argued that the use of algae-killing chemicals in the reservoir is merely treating the symptom of the real problem, which they claim is excess nutrients in the lake.

A city-funded survey of the Lake Hennessey and Lake Milliken watersheds has identified vineyard run-off, particularly fertilizers and pesticides, as well as cattle grazing as likely sources of excess nutrients that are trickling into the lake and triggering algae growth.

Brun said trying to change existing land use practices can spark the timeless and often fruitless tug-of-war between private property owners and government agencies, but this isn't always the case.

So far Brun said the city's algae-fighting solution would be PAK-27 -- a sodium carbonate peroxyhydrate that breaks down into hydrogen peroxide and sodium carbonate when it hits water. Hydrogen peroxide has a half-life of less than eight hours in water, according to fact sheets from the California State Water Resources Control Board, which has permitted the use of the algaecide.

When EDEN questioned the city's ability to use PAK-27, Brun replied in an e-mail: "My understanding is that a CEQA analysis is not required for applications that are covered by the General Permit," adding that he believes PAK-27 was added to the city's permit in June 2006 for the discharge of aquatic pesticides for aquatic weed control in the lake.

Though EDEN's water expert, Nicole Beck, has voiced no issues about the use of PAK-27 in the short-term, she believes a long-term study is warranted. #

http://www.napavalleyregister.com/articles/2007/03/24/news/local/iq_3879433.txt

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