SAN LUIS OBISPO COUNTY AIR POLLUTION CONTROL DISTRICT
RULE 420 - CUTBACK ASPHALT PAVING MATERIALS
(Adopted 6/18/79; Revised 1/22/97)
A. APPLICABILITY
The provisions of this Rule shall apply to the manufacture, application, and sale of cutback and emulsified
asphalt materials for the paving, construction, and maintenance of streets, highways, parking lots, and driveways.
B. DEFINITIONS
- "Asphalt": A dark-brown to black refined liquid or solid cementitious material of which the main
constituents are bitumens suitable for use in the manufacture of paving materials or dust palliative.
- "Cementitious": Having the properties of cement.
- "Cutback Asphalt": Paving grade asphalts liquefied with petroleum distillate and as further defined
by American Society for Testing and Materials (ASTM) specifications as follows:
Rapid Cure Type: |
ASTM Method D 2028 |
Medium Cure Type: |
ASTM Method D 2027 |
Slow Cure Type: |
ASTM Method D 2026 |
- "Dust Palliative": Means any light application of liquefied asphalt (cutback or emulsified asphalt)
for the express purpose of controlling loose dust.
- "Emulsified Asphalt": Any asphalt liquefied with water containing an emulsifier. The two kinds of
emulsions most pertinent are the anionic and cationic types.
- "Road Oils": Shall be synonymous with slow cure asphalts.
- "Volatile Organic Compound (VOC)": As defined in the current version of District Rule 105, Definitions.
C. EXEMPTIONS
- The provisions of this Rule shall not apply to cutback asphalt manufactured in the District for shipment and
use outside the District.
- The recordkeeping provisions of Section F shall not apply to any person who uses or applies asphalt materials
utilized exclusively in connection with any structure which is designed and used exclusively as a dwelling for
not more than four families.
D. REQUIREMENTS
- A person shall not sell, offer for sale, use, or apply for paving, construction, or maintenance of parking
lots, driveways, streets, or highways, any cutback asphalt material which contains more than 0.5 percent by volume
VOCs which evaporate at 260 degrees celsius (500 degrees Fahrenheit) or less.
- A person shall not sell, offer for sale, use, or apply for paving, construction, or maintenance of parking
lots, driveways, streets, or highways, any emulsified asphalt material which contains more than 3.0 percent by
volume VOCs which evaporate at 260 degrees celsius (500 degrees Fahrenheit) or less.
E. TEST METHODS
- Samples of cutback asphalt containing VOC as specified in Subsection D.1 shall be analyzed in accordance with
ASTM Distillation Method D 402.
- Samples of emulsified asphalt containing VOC as specified in Subsection D.2 shall be analyzed in accordance
with ASTM Distillation Method D 244.
F. RECORDKEEPING
Any person who manufactures or uses cutback asphalts or emulsified asphalts which contain solvents shall:
- Maintain records showing the types and amounts of cutback and emulsified asphalts produced or used,
- Maintain records of the destination of any asphalt paving material for which an exemption is claimed under
Subsection C.1, and
- Retain and make records available for inspection by the Air Pollution Control Officer (APCO) for a period of
three (3) years.
G. COMPLIANCE SCHEDULE
Any person who uses cutback or emulsified asphalt within the District shall be in full compliance with this
Rule no later than July 22, 1997.