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REPRODUCED AT GOVERNWNT EXPENSEf 10 . 2.1.2.3 Asphaltic Emulsion: Section 94 of the Standard Specifications, Type SS -1. 2.1.3 Weed Control: 2.1.3.1 Herbicide shall be a dry, free-flowing, dust -free chemical compound which is non-flammable, non-poisonous and non -corrosive. The chemical shall be a chlorate -borate compound, such as polybor-chlorate and 68 percent sodium metaborate, or 73 percent disodium octaborate, suitable for application in powder form or in a solution. PART 3 - EXECUTION 3.1 BASE COURSE: Place aggregate base in accordance with requirements of' Section 26 of the Standard Specifications and to the thickness shown. Grade and compact in 6 -inch layers to at least 100 percent of maximum density (ASTM D1557 Method D). 3.2 MAINTENANCE: Maintain the base course until the asphaltic pavement is in place. Maintenance shall include drainage, rolling, shaping and water as necessary to maintain the course in proper condition. Maintain sufficient moisture at the surface to prevent a dusty condition by light sprinkling with water. Areas of completed base course that are damaged by freezing shall be conditioned, reshaped and recompacted in accordance with the requirements of this specificaiton without additional cost to the Government. 3.3 FINISH SURFACE: The finish surface of base course, when tested for uniformity of slope, shall not deviate at any point more than 3/8 inch from bottom of a 10 -foot straightedge laid in any direction. When base course is constructed in more than one layer, specified smoothness requirements shall apply only to top surface. 3.4 WEED CONTROL: One day before the application or placement of bituminous material on the base, the surface shall be sterilized with herbicide. Apply chemical at the rate of 4 pounds per 100 square feet. Apply to the surface dry or as a solution. If applied dry, add water to the surface at a rate of 4 gallons per 100 square feet. If applied as solution, dissolve chemical at the rate of one pound per gallon of water and spray on at the rate of 4 gallons of solution per 100 square feet. 3.5 PRIME COAT: Prior to the application of the asphaltic concrete, apply a bituminous prime coat of liquid asphalt on the prepared compacted base at the rate of 0.25 gallons per square yard. Apply liquid asphalt by pressure distributors. Allow sufficient time before placing the asphalt concrete to permit the prime coat asphalt to penetrate the prepared compacted base. 3.6 ASPHALT CONCRETE: 3.6.1 Requirements: The bituminous concrete shall consist of mineral aggregate, uniformly mixed with bituminous material in a central plant in accordance with Section 39 of the Standard Specifications. The percentage of 4