Specifications include, but are not limited to: Patching HOT-MIX Asphalt Pavement: Saw cut perimeter of each patch and excavate existing pavement section to a sound base. Excavate rectangular or trapezoid patches, extending 24 inches into adjacent sound pavement, unless otherwise indicated. Cut excavation faces vertically. Remove excavated material. Re-compact existing unbound-aggregate base course to form new subgrade Tack Coat: Apply uniformly to vertical surfaces abutting or projecting into new. Hot mix paving at a rate of .05 to .015 gal. /sq. yd. Patching: Fill excavated pavements with hot-mix asphalt base mix and, while still hot, compact flush with adjacent surface. Surface Preparation Proof-roll subbase as specified in Division 31 General: Immediately before placing asphalt materials, remove loose debris and deleterious material from substrate surfaces. Ensure that prepared subgrade is ready to receive paving. Herbicide Treatment: Apply herbicide according to manufacturers recommended rates and written application instructions. Apply to dry, prepared subgrade or surface of compacted aggregate base before applying paving materials. Tack Coat: Apply when overlaying existing pavement, on adjacent horizontal surfaces such as curbs, and between base and surface courses when two courses are not installed in a continuous installation. • Apply at a rate of .05 to .015 gal. /sq. yd. • Avoid smearing or staining adjoining surfaces, appurtenances and surroundings. Remove spillages and clean affected surfaces. Hot-Mix Asphalt Placing Machine place hot-mix asphalt on prepared surface, spread uniformly and strike off. Place asphalt mix by hand to areas inaccessible to equipment in a manner that prevents segregation of mix. Place each course to required grade, cross section and thickness when compacted. • Spread mix at a minimum of 250 deg. F. • Regulate paver machine speed to obtain smooth, continuous surface free of pulls and tears in asphalt-paving mat.