PENNZSUPPRESS®
D RECOMMENDED PRACTICES FOR REDUCING THE
GENERATION OF AIRBORNE PARTICULATE MATTER FROM UNPAVED ROADS
Purpose: To reduce the generation of airborne particulate matter by
treating unpaved roads with PennzSuppress®
D.
Evaluate the unpaved road closely to determine the condition of the road
and to determine the appropriate application of PennzSuppress®
D. Specific consideration should be given to:
-
Road imperfections such as
potholes, wash-boarding, aggregate loss, rutting, etc.,
-
Type of material from which the road has been
constructed, including the aggregate and particle size distribution (ie.
clay content, largest aggregate size, etc.),
-
Slope and drainage of the road,
-
Number of vehicle passes per day,
-
Type of vehicles using the
road, and
-
Local climate, including annual rainfall
amounts, relative atmospheric humidity, temperature extremes, and seasonal climatological fluctuations.
Repair the road as necessary by:
-
Correcting road imperfections such as
potholes, wash-boarding, rutting and a lack of road base aggregate
material, and
- Correcting improper drainage by constructing a crown/slope on the road,
cutting ditches along the length of the road and/or constructing drainage
beneath the road surface.
Apply a dilution of PennzSuppress®
D evenly on the road surface. The dilution will range from 4:1 to 9:1 parts
water to PennzSuppress®
D concentrate. The recommended application rate is 0.25 to 0.50 gallons per
square yard (1.125 to 2.25 liters per square meter). The dilution and
application rate may be adjusted, depending on:
Apply a second product treatment to effectively bind any loose road surface
material, seven to 10 days after the initial application. This second
application should be applied at a rate not to exceed 0.25 gallons per square
yard (1.125 liters per square meter) to ensure the product dilution fully
penetrates the road surface. As with the initial application, the dilution
will depend on the road conditions at the time of the application. Regardless
of the dilutions or application rates used, the quantity of PennzSuppress®
D concentrate used to treat each square yard of surface should total no less
than 0.15 gallons (0.68 liters per square meter).
Plan follow-up treatment of the road according to the deterioration of the
road surface over time. The effectiveness of PennzSuppress®
D to suppress dust to a level over time will be affected by those items
detailed in item 1. It should be noted, however, that over time, with repeated
PennzSuppress® D
treatments, the amount of product required to achieve similar dust suppression
efficiencies will likely decrease to a point over time. |