posted on Sep, 18 2009 @ 07:13 PM
Gallium is often found as a trace element in diaspore, sphalerite, germanite, bauxite, and coal. Some flue dusts from burning coal have been shown to
contain as much 1.5 percent gallium.
Arizona Republic
September 18, 2009 |
News
SRP settlement: $400 million to cut coal pollution
by Ginger D. Richardson and Ryan Randazzo
The Arizona utility, which serves 935,000 customers in the Phoenix area, must also pay a nearly $1 million fine and spend an additional $4 million on
environmental-improvement projects within the state.
SRP, which has been negotiating the deal with the Department of Justice since April 2007, said Tuesday that it had been anticipating the extra
expenses and that it won't result in customer rate hikes.
The federal government's complaint, filed along with the settlement, alleges that SRP "illegally modified" its Coronado Generating Station from
1996 to 2000.
The utility also failed to obtain required paperwork and install systems to reduce air pollution at the facility, according to the Environmental
Protection Agency.
"Power-plant modifications must include required emissions controls to protect public health and the environment," said Wayne Nastri, administrator
for the EPA's Pacific Southwest region.
In this case, the agency says the modifications allowed the plant to burn more coal, which increased the amount of pollution.
SRP owns or operates six coal-fired power plants in the state; Coronado is a 773-megawatt plant near St. Johns in eastern Arizona.
It can provide enough electricity to power 193,000 homes.
In settling the case, SRP avoids a protracted and potentially costly litigation process. The utility "denies the violations alleged in the
complaint" and makes no admission of liability, the agreement says.
None of the suspected violations posed a public-health risk, officials said.
Plant upgrades
SRP admits it made various modifications to the Coronado power plant dating to the 1980s. But the utility says it considered the changes routine
maintenance and upgrades.
The EPA, however, said SRP was required, under amendments to the Clean Air Act, to have applied for permits.
Jim Pratt, SRP manager of generation engineering, said the upgrades affected the way the plant crushed coal before burning it and included
modifications to the boiler and the turbine.
But he said none of the changes necessarily made the plant dirtier.
However, the changes, coupled with increased customer demand, have prompted the facility to operate at a higher capacity, Pratt said.
And the more coal plants run, the more pollution they create.
In Coronado's case, operating capacity has jumped to above 90 percent, compared with about 55 percent in the mid-1990s.
As part of the settlement, SRP will now need to install scrubbers at the plant to help control sulfur-dioxide emissions.
The utility will also have to retrofit equipment to further limit nitrogen-oxide emissions and install new systems to continually monitor the
coarse-particulate emissions from the generating station.
The EPA says the changes will reduce SO[-2] and NO[-X] emissions by over 21,000 tons each year.
Those reductions are important because the pollutants can cause respiratory problems and contribute to childhood asthma, as well as impair visibility
in national parks, EPA spokeswoman Margot Perez-Sullivan said.
[edit on 18-9-2009 by liveandletlive]
[edit on 18-9-2009 by liveandletlive]
[edit on 18-9-2009 by liveandletlive]
[edit on 18-9-2009 by liveandletlive]