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White Mountain Wilderness

Home > PSD Limits > Map, List > White Mountain Wilderness

General Information

Image of White Mountain Wilderness

State(s): New Mexico

County(s): Lincoln

Forest Service Administrative Unit(s):
Southwest Region (Region 3) -- Lincoln National Forest

Size: 48266 acres

Elevation Range: 6,000 - 11,580 feet

Data:

Documents

Resource Concern Thresholds

AQRV Type: VISIBILITY
Sensitive Receptor Sensitive Receptor Indicator Thresholds
Natural Visibilty For sources generally further than 50 km from a Class I area, the visibility threshold for concern is not exceeded if the 98th %ile change in light extinction is <5% for each year modeled, when compared to the annual average natural condition value for that Class I area.
Plume Blight Absolute Contrast Higher level near-field screening and refined analysis: no further analysis will likely be requested if a new or modified source can show that impacts from a new or modified source will stay with the threshold of DeltaE <1.0 and |C| <0.02 modeled against natural conditions.
Plume Blight Absolute Contrast For near field sources (within 50 km of a Class I area), no additional analysis will be requested If screening analysis of a new or modified source can demonstrate that its emissions will not cause a plume with hourly estimates of DeltaE (color difference index) greater than or equal to 2.0 or the absolute value of the contrast greater than or equal to 0.05 when modeled against natural conditions.
Plume Blight Color Difference Index Plume blight near-field refined analysis: no further analysis will likely be requested if a new or modified source can show that impacts from a new or modified source will stay with the threshold of DeltaE <1.0 and |C| <0.02 when modeled against natural conditions.
Plume Blight Color Difference Index For near field sources (within 50 km of a Class I area), no additional analysis will be requested If screening analysis of a new or modified source can demonstrate that its emissions will not cause a plume with hourly estimates of DeltaE (color difference index) greater than or equal to 2.0 or the absolute value of the contrast greater than or equal to 0.05 when modeled against natural conditions.

AQRV Type: WATER
Sensitive Receptor Sensitive Receptor Indicator Thresholds
Headwater Systems Aluminum No more than a 10% increase in aluminum in headwater systems is acceptable.
Headwater Systems Anions No more than a 10% change in anions in headwater systems is acceptable.
Headwater Systems Calcium No more than a 10% change in calcium in headwater systems is acceptable.
Headwater Systems Cations No more than a 10% change in cations in headwater systems is acceptable.
Headwater Systems Chloride No more than a 10% change in chloride in headwater systems is acceptable.
Headwater Systems Conductivity No more than a 10% change in conductivity in headwater systems is acceptable.
Headwater Systems Nitrate No more than a 10% increase in nitrates in headwater systems is acceptable.
Headwater Systems Sulfate No more than a 10% increase in sulfates in headwater systems is acceptable.
Headwater Systems pH No more than a 10% change in the pH of headwater systems is acceptable.
Perennial Streams Anions No more than a 10% change in anions in perennial streams is acceptable.
Perennial Streams Cations No more than a 10% change in cations in perennial streams is acceptable.
Perennial Streams Conductivity No more than a 10% change in conductivity in perennial streams is acceptable.
Perennial Streams pH No more than a 10% change in the pH of perennial streams is acceptable.
Perennial Waters Aluminum No more than a 10% increase in aluminum in perennial waters is acceptable.
Perennial Waters Anions No more than a 10% change in anions in perennial waters is acceptable.
Perennial Waters Calcium No more than a 10% change in calcium in perennial waters is acceptable.
Perennial Waters Cations No more than a 10% change in cations in perennial waters is acceptable.
Perennial Waters Chloride No more than a 10% change in chloride in perennial waters is acceptable.
Perennial Waters Conductivity No more than a 10% change in conductivity in perennial waters is acceptable.
Perennial Waters Nitrate No more than a 10% increase in nitrates in perennial waters is acceptable.
Perennial Waters Sulfate No more than a 10% increase in sulfates in perennial waters is acceptable.
Perennial Waters pH No more than a 10% change in the pH of perennial waters is acceptable.
Water Quality Regulated Constituents For water quality, no more than a 10% change in regulated constituents is acceptable.
Pollutant Exposure Concern Thresholds
Pollutant Exposures Level Name Thresholds
N EXCEEDANCE The Deposition Analysis Threshold for nitrogen deposition is 0.005 kg/ha/yr. Below this, estimated impacts from a source greater than 50km from a FLM Class I Area are considered negligible.
Q QOverD For new or modified sources locating greater than 50 km from a Class I area, its impacts will be considered negligible with respect to Class I AQRVs if its total SO2, NOx, PM25, PM10, and H2SO4 annual emissions in tons/yr, based on 24-hr maximum allowable emissions, divided by the distance (km ) from the Class I area (Q/D) is 10 or less. For sources operating less than a year, the emissions must be adjusted to reflect what the emissions would be if the source operated year-round.
S EXCEEDANCE The Deposition Analysis Threshold for sulfur deposition is 0.005 kg/ha/yr. Below this, estimated impacts from a source greater than 50km from a FLM Class I Area are considered negligible.

Natural Background Visibility

Site Specific Rayleigh scattering coefficient: 9 Clearest 20% Natural Clearest 20% 2000-2004 Baseline Haziest 20% Natural Haziest 20% 2000-2004 Baseline Average Annual Natural Annual Average 2000-2004 Baseline
Standard Visual Range (km) 335 256 189 97 262 163
Haze Index (dv) 0.66 3.55 6.8 13.7 3.31 8.33
For more information on these numbers, click here.