Solar industry grapples with hazardous wastes

Posted On 10 Feb 2013
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GLOBE-Net, 10 February, 2013 – Homeowners on the hunt for sparkling solar panels are  lured by ads filled with images of pristine landscapes and bright sunshine, and words about the technology’s benefits for the environment –  and the wallet.  What customers may not know is that there’s a dirtier side.

While solar is a far less polluting energy source than coal or natural  gas, many panel makers are nevertheless grappling with a hazardous waste  problem.

[stextbox id=”custom” float=”true” width=”200″ bcolor=”add3d5″ bgcolor=”add3d5″ image=”null”]Fueled partly by billions in government incentives, the industry  is creating millions of solar panels each year and, in the process,  millions of pounds of polluted sludge and contaminated water.[/stextbox]

To dispose of the material, the companies must transport it by truck or  rail far from their own plants to waste facilities hundreds and, in some  cases, thousands of miles away.

The fossil fuels used to transport that waste, experts say, is not  typically considered in calculating solar’s carbon footprint, giving  scientists and consumers who use the measurement to gauge a product’s  impact on global warming the impression that solar is cleaner than it is.

After installing a solar panel, “it would take one to three months of  generating electricity to pay off the energy invested in driving those  hazardous waste emissions out of state,” said Dustin Mulvaney, a San Jose  State University environmental studies professor who conducts carbon  footprint analyses of solar, biofuel and natural gas production.

The waste from manufacturing has raised concerns within the industry,  which fears that the problem, if left unchecked, could undermine solar’s  green image at a time when companies are facing stiff competition from  each other and from low-cost panel manufacturers from China and elsewhere.

“We want to take the lessons learned from electronics and semiconductor  industries (about pollution) and get ahead of some of these problems,”  said John Smirnow, vice president for trade and competitiveness at the  nearly 500-member Solar Energy Industries Association.

The increase in solar hazardous waste is directly related to the  industry’s fast growth over the past five years – even with solar business  moving to China rapidly, the U.S. was a net exporter of solar products by  $2 billion in 2010, the last year of data available. The nation was even a net exporter to China.

New companies often send hazardous waste out of their plants because they  have not yet invested in on-site treatment equipment, which allows them to  recycle some waste.

Nowhere is the waste issue more evident than in California, where landmark  regulations approved in the 1970s require industrial plants like solar  panel makers to report the amount of hazardous materials they produce, and  where they send it. California leads the consumer solar market in the U.S.  – which doubled overall both in 2010 and 2011.

The Associated Press compiled a list of 41 solar makers in the state,  which included the top companies based on market data, and startups. In  response to an AP records request, the California Department of Toxic  Substances Control provided data that showed 17 of them reported waste,  while the remaining did not.

The same level of federal data does not exist.

The state records show the 17 companies, which had 44 manufacturing  facilities in California, produced 46.5 million pounds of sludge and  contaminated water from 2007 through the first half of 2011. Roughly 97  percent of it was taken to hazardous waste facilities throughout the state, but more than 1.4 million pounds were transported to nine other  states: Arkansas, Minnesota, Nebraska, Rhode Island, Nevada, Washington,
Utah, New Mexico and Arizona.

Several solar energy experts said they have not calculated the industry’s  total waste and were surprised at what the records showed.

Solyndra, the now-defunct solar company that received $535 million in  guaranteed federal loans, reported producing about 12.5 million pounds of  hazardous waste, much of it carcinogenic cadmium-contaminated water, which  was sent to waste facilities from 2007 through mid-2011.

Before the company went bankrupt, leading to increased scrutiny of the  solar industry and political fallout for President Barack Obama’s  administration, Solyndra said it created 100 megawatts-worth of solar  panels, enough to power 100,000 homes.

The records also show several other Silicon Valley solar facilities  created millions of pounds of toxic waste without selling a single solar  panel, while they were developing their technology or fine-tuning their  production.

While much of the waste produced is considered toxic, there was no  evidence it has harmed human health.

The vast majority of solar companies that generated hazardous waste in  California have not been cited for waste-related pollution violations,  although three had minor violations on file.

In many cases, a toxic sludge is created when metals and other toxins are  removed from water used in the manufacturing process. If a company doesn’t  have its own treatment equipment, then it will send contaminated water to  be stored at an approved dump.

According to scientists who conduct so-called “life cycle analysis” for  solar, the transport of waste is not currently being factored into the  carbon footprint score, which measures the amount of greenhouse gases  produced when making a product.

Life cycle analysts add up all the global warming pollution that goes into  making a certain product – from the mining needed for components to the  exhaust from diesel trucks used to transport waste and materials. Not  factoring the hazardous waste transport into solar’s carbon footprint is  an obvious oversight, analysts said.

“The greenhouse gas emissions associated with transporting this waste is  not insignificant,” Mulvaney said.

Mulvaney noted that shipping, for example, 6.2 million pounds of waste by  heavy-duty tractor-trailer from Fremont, Calif., in the San Francisco Bay  area, to a site 1,800 miles away could add 5 percent to a particular  product’s carbon footprint.

Such scores are important because they provide transparency to government  and consumers into just how environmentally sustainable specific products  are and lay out a choice between one company’s technology and another’s.

The roughly 20-year life of a solar panel still makes it some of the  cleanest energy technology currently available. Producing solar is still  significantly cleaner than fossil fuels. Energy derived from natural gas  and coal-fired power plants, for example, creates more than 10 times more hazardous waste than the same energy created by a solar panel, according  to Mulvaney.

The U.S. solar industry said it is reporting its waste, and sending it to  approved storage facilities – thus keeping it out of the nation’s air and  water. A coal-fired power plant, in contrast, sends mercury, cadmium and  other toxins directly into the air, which pollutes water and land around  the facility.

“Having this stuff go to … hazardous waste sites, that’s what you want  to have happen,” said Adam Browning, executive director of the Vote Solar  Initiative, a solar advocacy group.

[stextbox id=”custom” float=”true” width=”200″ bcolor=”add3d5″ bgcolor=”add3d5″ image=”null”]Environmental advocates say the solar industry needs greater transparency,  which is getting more complicated as manufacturing moves from the U.S. and  Europe to less regulated places such as China and Malaysia.[/stextbox]

The Silicon Valley Toxics Coalition, a watchdog group created in 1982 in  response to severe environmental problems associated with the valley’s  electronics industry, is now trying to keep the solar industry from making  similar mistakes through a voluntary waste reporting “scorecard.” So far,  only 14 of 114 companies contacted have replied. Those 14 were larger  firms that comprised 51-percent of the solar market share.

“We find the overall industry response rate to our request for  environmental information to be pretty dismal for an industry that is  considered ‘green,'” the group’s executive director, Sheila Davis, said in  an email.

While there are no specific industry standards, Smirnow, head of the solar  industry association, is spearheading a voluntary program of environmental  responsibility. So far, only seven of the group’s nearly 81 manufacturers  have signed the pledge.

“We want (our program) to be more demanding, but this is a young industry  and right now manufacturing companies are focused on survival,” he said.

by JASON DEAREN,  Associated Press


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