Comparison of Environmental Impacts Under 3 Alternatives (from SWEIS Executive Summary)

                

No Action Alternative
 (As Operated Now)

Expanded Operations Alternative

Reduced Operations Alternative

Energy Use

"Average power demand would be 22 megawatts, with a peak demand of 30 megawatts."


"Average power demand would be 28 megawatts, with a peak demand of 41 megawatts... NNSS would rebuild the 138 kilovolt transmission system to accommodate increased loads."


"Average power demand would be 20 megawatts, with a peak demand of 27 megawatts."

"Estimated annual use of liquid fuels:

Heating Oil: 66,000 gallons
Unleaded gas: 427,000 gallons
Ethanol/E85: 217,000 gallons
#2 Deisel: 65,000 gallons
Biodeisel: 343,000 gallons"

Total: 1,118,000 gallons

"Estimated annual use of liquid fuels:

Heating Oil: 83,000 gallons
Unleaded gas: 534,000 gallons
Ethanol/E85: 271,000 gallons
#2 Deisel: 81,000 gallons
Biodeisel: 429,000 gallons"

Total: 13,980,000 gallons

"Estimated annual use of liquid fuels:

Heating Oil: 59,000 gallons
Unleaded gas: 384,000 gallons
Ethanol/E85: 195,000 gallons
#2 Deisel: 59,000 gallons
Biodeisel: 309,000 gallons

Total: 1,006,000 gallons

Geology and Soils (National Security/Defense Mission)

"700 acres would be disturbed by dynamic experiments in boreholes, explosives experiments, drillback operations, Office of Secure Transportation training and exercises, experiments involving biological stimulants, and counterterrorism training."

"About 13,455 acres of soil would be disturbed by the same kinds of activities as under the No Action Alternative, including:

Up to 10,000 acres of soil would be disturbed for an Office of Secure Transportation training facility;

120 acres for Depleted Uranium experiment sites; and

3,335 acres for additional explosives experiments, new test beds and training facilities, drillback operations, and additions to existing aviation facilities at the NNSS."

"About 430 acres of soil would be disturbed by many of the same kinds of activities as under the No Action Alternative, except:

There would be 50% fewer explosive experiments and 33% fewer Office of Secure Transportation training and exercises."


Geology and Soils (Environmental Management Mission)

"Construction of a commercial solar power generation facility and associated transmission lines would disturb approximately 2,650 acres."

"Construction of 1,000 megawatts of commercial solar power generation facility and associated transmission lines would disturb approximately 10,300 acres.

Replacing the existing 138-kilovolt NNSS electrical transmission line would disturb about 467 acres of soil.

Construction of a DOE photovoltaic solar power generation facility would disturb about 50 acres... Minor soil disturbance is expected from several additional research projects.

Development of a geothermal demonstration project would disturb up to 50 acres of soil."

"Construction of a commercial solar power generation facility could disturb approximately 1,200 acres."

Surface Water Resources (National Security/Defense Mission)

"Disturbance of about 700 acres of land by dynamic experiments in boreholes, explosives experiments, drillback operations, Office of Secure Transportation training and exercises, experiments involving releases of chemicals and biological simulants, and counterterrorism training would cause alterations of natural drainage pathways, contamination... sedimentation..."

"About 13,455 acres of soil and near-surface geologic media would be disturbed by the same kinds of activities as under the No Action Alternative, including:

Up to 10,000 acres of soil would be disturbed for Office of Secure Transportation training facilities;

120 acres for Depleted Uranium experiment sites; and

3,335 acres for additional explosives experiments, new test beds and training facilities, drillback operations, and additions to existing aviation facilities at the NNSS.

This would result in proportionally larger impacts on ephemeral waters..."

About 430 acres of soil and near-surface geologic media would be disturbed by many of the same kinds of activities as under the No Action Alternative, except:

There would be 50% fewer explosive experiments and 33% less Office of Secure Transportation training and exercises.

This would result in proportionally smaller impacts on ephemeral waters..."


Surface Water Resources (Environmental Management Mission)

"Disturbance of up to 190 acres of soil to construct, use, cover and close disposal units within the existing Area 5 Radioactive Waste Management Complex would result in impacts on ephemeral waters due to alteration of natural drainage pathways, increased erosion, and subsequent sedimentation."

"Same as under the No Action Alternative, except:

Disturbance of up to 600 acres of soil  to construct, use, cover and close disposal units within the existing Area 5 Radioactive Waste Management Complex, plus up to 35 acres of disturbance for new sanitary, decontamination, decommissioning, and construction waste landfills would result in impacts on ephemeral waters due to alteration of natural drainage pathways, increased erosion, and subsequent sedimentation."

"Same as under the No Action Alternative for both Waste Management and Environmental Restoration."

"The Soils Project would reduce or stabilize legacy contamination in soil and could result in disturbance of up to 420 acres.

Soil disturbance on about 500 acres of land from drilling additional wells for the Underground Test Area Project could cause localized erosion, as could decontamination and decommissioning of industrial sites, remediation of Defense Threat Reduction Agency sites, and the Borehole Management Program.

These activities would affect ephemeral waters by altering natural drainage pathways and increasing sedimentation. Stabilization and/or removal of contaminated facilities and soils would reduce the potential for contamination of ephemeral waters."

"Environmental Restoration impacts would be the same as under the No Action Alternative."


Surface Water Resources (Nondefense Mission)

"No new disturbances during infrastructure activities..."

Up to 517 acres of land disturbed... rebuilding the 138 kilovolt transmission line... and construction of a 5 megawatt photovoltaic solar power generation facility. These disturbances would result in alterations of natural drainage pathways and increased sedimentation..."



Development of a 240 megawatt commercial solar power generation facility and associated transmission lines would alter natural drainage pathways over 2,650 acres in Area 25... potential for chemical contamination and sedimentation to ephemeral waters during construction-related preparation."

Development of up to 1,000 megawatts commercial solar power generation facilities and associated transmission lines would disturb drainage pathways over 10,300 acres... increased erosion and construction/operation activities would potentially increase chemical contamination and sedimentation to ephemeral waterways.

Development of a Geothermal Demonstration Project would disturb up to 50 acres and cause sedimentation..."

Same as under the No Action Alternative, except:

The land area associated with the solar power generating facility would be 1,200 acres."