AND (Sq. Ft.) 373 Petroleum emulsion DEFINITION Controlling direct particulate matter emissions Polymer emulsion produced by vehicle and machinery traffic or Clay Additive wind action from unpaved roads and other surfaces by applying a palliative on the Bituminous (petroleum-based road oil) surface. Examples of product types and names are available in the specification. Hygroscopic palliatives (those that control dust This practice may be applied as part of a by absorbing water from the air) shall not be conservation management system to control used in arid and semi-arid environments. dust from unpaved roads and other surfaces Calcium chloride and magnesium chloride which is generated by vehicle or machinery shall not be used in locations where the daily traffic, and/or wind. summertime relative humidity averages below 30%. For more details, see the specification. The surfaces to be treated shall be graded This practice applies to any non-vegetated, and/or smoothed as needed and prescribed by unpaved surface where vehicle movement or the product guidance before the dust control wind action would normally occur, such as an product is applied. unpaved road, traffic area, parking lot, staging or assembly area, equipment storage lot, The area shall be treated to achieve a runway, or loading/unloading area. It does not minimum of 50% dust control at time of apply to paved surfaces, vegetated areas, application of material. The amount of dust rangeland or cropland, or to surfaces that are control achieved will be determined by normally subject to animal activity, such as standardized emission reduction factors for the pens and corrals. various materials. The area shall be re-treated if it is heavily disturbed by grading or other major General Criteria Applicable to all Purposes disturbance after prior treatment. The practice shall be applied following all label If continued effectiveness of the product is directives, in accordance with federal, state, warranted after natural weathering has and local laws and regulations. reduced its effectiveness to the point where The palliative (dust control product) shall be airborne particulate matter from the surface is one of the following: visible, the palliative control product shall be re-applied. Water dust control for more than 12 hours is Water absorbing suppressant (hygroscopic needed, water as a dust control product shall palliative) not be used unless it is reapplied. Adhesive
(Sq. Ft.) 373 DEFINITION Controlling direct particulate matter emissions produced by vehicle and machinery traffic or wind action from unpaved roads and other surfaces by applying a palliative on the surface. This practice may be applied as part of a conservation management system to control dust from unpaved roads and other surfaces which is generated by vehicle or machinery traffic, and/or wind. This practice applies to any non-vegetated, unpaved surface where vehicle movement or wind action would normally occur, such as an unpaved road, traffic area, parking lot, staging or assembly area, equipment storage lot, runway, or loading/unloading area. It does not apply to paved surfaces, vegetated areas, rangeland or cropland, or to surfaces that are normally subject to animal activity, such as pens and corrals. General Criteria Applicable to all Purposes The practice shall be applied following all label directives, in accordance with federal, state, and local laws and regulations. The palliative (dust control product) shall be one of the following: Water Water absorbing suppressant (hygroscopic palliative) Adhesive Petroleum emulsion Polymer emulsion Clay Additive Bituminous (petroleum-based road oil) Examples of product types and names are available in the specification. Hygroscopic palliatives (those that control dust by absorbing water from the air) shall not be used in arid and semi-arid environments. Calcium chloride and magnesium chloride shall not be used in locations where the daily summertime relative humidity averages below 30%. For more details, see the specification. The surfaces to be treated shall be graded and/or smoothed as needed and prescribed by the product guidance before the dust control product is applied. The area shall be treated to achieve a minimum of 50% dust control at time of application of material. The amount of dust control achieved will be determined by standardized emission reduction factors for the various materials. The area shall be re-treated if it is heavily disturbed by grading or other major disturbance after prior treatment. If continued effectiveness of the product is warranted after natural weathering has reduced its effectiveness to the point where airborne particulate matter from the surface is visible, the palliative control product shall be re-applied. dust control for more than 12 hours is needed, water as a dust control product shall not be used unless it is reapplied. AND
nrcs143_026180.docx