Chapter 5.100
SURFACE RESTORATION
Sections:
5.100.020 Air Quality Control Board regulations.
5.100.030 Pavement restoration.
5.100.090 Conformance to existing improvements.
5.100.100 Raising existing castings to grade.
5.100.110 Restoration of striping and pavement markers.
5.100.120 Unpaved travel surfaces.
5.100.140 Landscaped or cultivated areas.
5.100.010 Description.
Surface restoration shall include the furnishing of all labor, material, equipment, tools, and services required for the performance of paving and surfacing operations, including repair of curbs, gutters, sidewalks, as well as public and private driveway and sidewalk areas, as specified here and/or as shown on the drawings or as necessary to complete the project. Any concrete curbs, gutters or sidewalks damaged by the work shall be repaired or replaced in kind.
No surface restoration shall be performed until all compaction tests have been made and passed and until approved by the District. [Ord. 2014-2 (Att. § 20-01).]
5.100.020 Air Quality Control Board regulations.
The contractor shall use materials which comply with the Bay Area Air Quality Management District. [Ord. 2014-2 (Att. § 20-02).]
5.100.030 Pavement restoration.
Pavement restoration for public roads shall conform to the requirements of the agency having jurisdiction over the roadway right-of-way. Materials for paving and surfacing shall conform to the applicable provisions of the State Standard Specifications and the County Specifications.
Pavement thickness shall match the thickness of the adjoining pavement or the thickness indicated on the drawings, whichever is greater. [Ord. 2014-2 (Att. § 20-03).]
5.100.040 Pavement cutting.
Trenches and other excavations in asphalt paved areas shall be cut by means of a saw or jackhammer equipped with a spade tool to the full depth of the pavement as required by the agency having jurisdiction over the street. Pavement cuts shall be laid out by a chalk line and care shall be taken to ensure neat, straight edges.
After the District has approved a section of trench for final paving, the contractor shall strip out all temporary pavement to the full depth of the new pavement section as specified. Spalled or cracked sections of pavement beyond the excavation limits which, in the opinion of the District, show signs of having separated from the adjoining pavement or are moveable, shall be removed and replaced with new pavement. Broken edges of pavement shall be trimmed along lines parallel to the trench edges. Exposed subgrade materials shall be compacted to the same standards as the adjoining trench backfill. [Ord. 2014-2 (Att. § 20-04).]
5.100.050 Pavement grinding.
Where required, existing pavement shall be ground down to make a smooth joint with existing gutters and joints with existing pavement. All pavement grinding shall be done in accordance with Section 42 of the State Standard Specifications. [Ord. 2014-2 (Att. § 20-05).]
5.100.060 Aggregate base.
Aggregate base shall be Class 2, conforming to Section 26 of the State Standard Specifications. Minimum relative compaction shall be 95 percent. Base shall be placed and compacted prior to placing of temporary paving. [Ord. 2014-2 (Att. § 20-06).]
5.100.070 Asphalt concrete.
Asphalt concrete shall conform to the applicable requirements of Section 39 of the State Standard Specifications for Type B aggregate or as modified by the agency with jurisdiction over the street. Paragraph 39-8 is not applicable. Surface courses shall be constructed using two-inch maximum graded aggregate. Lower courses shall be constructed using three-fourth-inch maximum graded aggregate.
Paving asphalt shall be Grade AR-4000, conforming to the requirements of Section 92 of the State Standard Specifications. Four to six percent bituminous binder shall be provided.
Bituminous mixtures shall be delivered to the roadbed at temperatures specified in Section 39 of the State Standard Specifications. Spreading of the mixture shall be in accordance with Section 39 of the State Standard Specifications. All loads shall be covered with tarpaulin or other material during transportation.
Initial or breakdown rolling and the final rolling of the uppermost layer of the asphalt concrete shall be compacted in accordance with Section 39 of the State Standard Specifications. Compaction by vehicular traffic shall not be permitted.
The joints between old and new pavements or between successive days’ work shall be carefully made in such manner as to insure a continuous bond between old and new sections of the course. After the trench has been backfilled, edges of the existing pavement shall be exposed and cleaned and retrimmed to straight, vertical surfaces. All joints shall be painted with a uniform coat of tack coat before the fresh mixture is placed. Each lift of asphalt concrete shall be allowed to cool down before the next lift is placed. Before the final lift of asphalt concrete is placed, the edges of the trench shall be tacked with RS-1 asphaltic emulsion. [Ord. 2014-2 (Att. § 20-07).]
5.100.080 Slurry seal.
Where shown on the plans, the contractor shall place a slurry seal. Slurry seal materials shall conform to the requirements of the State Standard Specifications, Section 37-2. [Ord. 2014-2 (Att. § 20-08).]
5.100.090 Conformance to existing improvements.
Asphalt concrete overlays shall be tapered to conform to existing paving, gutters, catch basins, etc. [Ord. 2014-2 (Att. § 20-09).]
5.100.100 Raising existing castings to grade.
After the final paving is placed, the contractor shall raise all existing monuments, valves, manholes and other castings to the final surface elevation. The method of raising the castings to grade shall conform to the requirements of the agency having jurisdiction over the street. [Ord. 2014-2 (Att. § 20-10).]
5.100.110 Restoration of striping and pavement markers.
After the final paving is complete, the contractor shall stripe the new pavement and provide new pavement markers and delineators to replace the old ones. Traffic stripes and pavement markings shall conform to Sections 84 and 85 of the State Standard Specifications. Markers and delineators shall conform to Section 82 of the State Standard Specifications. No work shall be done until the layout is approved by the agency having jurisdiction over the street. Restoration of striping and pavement markings shall be included in the cost of pavement restoration. [Ord. 2014-2 (Att. § 20-11).]
5.100.120 Unpaved travel surfaces.
Trenches in unpaved areas of private streets shall be surfaced with a minimum of 12 inches of Class 2 aggregate base. [Ord. 2014-2 (Att. § 20-12).]
5.100.130 Concrete surfaces.
All concrete curbs, gutters, aprons, patios, driveways and sidewalks which are broken, cracked or damaged by installation of the improvements shall be reconstructed by and at the expense of the contractor, of the same kind of material and of the same dimensions as the original work, conforming to the requirements of Section 43 of the County Specifications. The repairs shall be made by removing and replacing the entire portions between joints or by removing the damaged portions by concrete saw and not by merely refinishing the damaged part. All work shall match the appearance of the existing improvements as nearly as practicable. Lamp black or other pigments may be added to the concrete to obtain the necessary result. [Ord. 2014-2 (Att. § 20-13).]
5.100.140 Landscaped or cultivated areas.
All excavations or trenches in landscaped or cultivated areas shall have the top 12 inches backfilled with top soil. The top soil shall consist of fertile, friable soil of loamy character conforming to the requirements of Section 20-2.01 of the State Standard Specifications or as specified in the special provisions. With specific approval from the District, the contractor may use top soil taken from the excavation. After installation, the top soil and any adjacent unimproved land which has been compacted by the operations of the contractor shall be thoroughly scarified and the surface cleared of all large clods, stones or debris. [Ord. 2014-2 (Att. § 20-14).]