PERMFILE72863

• Permit No: M2000077
• IBM Index Class Name: Permit File
• Doc Name: ENVIRONMENTAL ASSESSMENT MULE CREEK GRAVEL PIT
• Media Type: D
• Archive: No

Mule Creek Gravel Pit~ironmental Assessment • Page 28
' sediment. Material has moved downhill towards the stream over time, but as of yet, there
doesn't appear to have been a significant contribution of sand to the stream channel. The
' site also contains a septic system which has been abandoned by a restaurant located
uphill, (on private land outside the proposed project boundaries). It is reported that this
system includes two 2,000-gallon tanks and the associated leach field. It is possible that
' if the tanks aze not pumped, they will eventually fail. Depending on the nature of the
failure, whether it sudden or gradual, the contents could flow into the tributary, causing a
sudden but one-time degradation in water quality.
'
From visual observations made during field visits, there aze no obvious, currently
occurring causes of water quality degradation.
'
3.1.1.5 Air Quality
' Air quality management in the Pike National Forest is accomplished through compliance
with the Clean Air Act amendment of 1977 (P.L. 95-95), Colorado's 1974 Fugitive Dust
Laws (CRS 1973, 25-7-108), the Colorado Air Quality Control Act of 1979, and the
Wilderness Act of 1964.
The Forest Service's role in air quality management is coordination of National Forest
' activities with State and Federal air quality control efforts. This is accomplished through
proper management of Forest Service activities such as prescribed fire, construction and
use of roads, and the operation of various facilities to insure compliance with air quality
' regulations and standards. In addition, the Forest Service is responsible for efforts to
protect National Forest System land from adverse impacts created by external sources of
air pollution, such as industrial plants and automobiles. This effort involves coordination
' of planning and permitting activities with the Environmental Protection Agency and the
Colorado Department of Public Health and Environment, Air Quality Control Division.

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The U.S. Environmental Protection Agency (EPA) and the Colorado Department of
Health, Air Quality Control Division have established air quality standazds to protect
public health and the environment. For purposes of this proposed project, the pollutants
of concern would be cazbon monoxide and fine particulate matter (PMZ.S) from fuel
combustion in motor vehicles (trucks), and mining equipment (screening operations) and
respirable particulate matter (PMIO) or fugitive dust from construction activities and wind
erosion from disturbed areas. The National Ambient Air Quality Standazds (NAAQS)
adopted by EPA and the Colorado Air Quality Control Commission aze shown below
(Table 3.1).
' Hydrosphere Resoun:c Consulunis, 1002 Walnut Suite 200, Boulder, CO 80302