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SIGNET STL Project No. 0010771 7�'Slln I.abS Appendix C.Page APPENDIX C PAVEMENT SPECIFICATIONS 1. DEFINITIONS - The term "pavement" shall include asphalt concrete surfacing, untreated aggregate base, and aggregate subbase. The term "subgrade" is that portion of the area on which surfacing, base, or subbase is to be placed. The term " Standard Specifications": hereinafter referred to is the January 1991 Standard Specifications of the State of California, Department of Transportation, and the "Materials Manual' is the Materials Manual of Testing and control Procedures, State of California, Department of Public Works, Division of Highways. The term "relative compaction" refers to the field density expressed as a percentage of the maximum laboratory density as defined in the applicable tests outlined in the Materials Manual. 2. SCOPE OF WORK - This portion of the work shall include all labor, materials, tools and equipment necessary for and reasonable incidental to the completion of the pavement shown on the plans and as herein specified, except work specifically notes as "Work Not Included." 3. PREPARATION OF THE SUBGRADE - The Contractor shall prepare the surface of the various subgrades receiving subsequent pavement courses to the lines, grades, and dimensions given on the plans. The upper six (6) inches of the soil subgrade beneath the pavement section shall be compacted to a minimum relative compaction of 90%. The finished subgrades shall be tested and approved by the Soils Engineer prior to the placement of additional pavement courses. 4. UNTREATED AGGREGATE BASE - The aggregate base course shall be spread and compacted on the prepared subgrade in conformity with the lines, grades, and dimensions shown on the plans. The aggregate base material shall conform to the requirements of Section 26 of the Standard Specifications for Class 2 material, 1%: inches maximum size. The base course material shall be compacted to a minimum relative compaction of 95%. The base material shall be spread and compacted in accordance with Section 26 of the Standard Specifications. The material shall be spread ` in layers not exceeding 6 inches and each layer of base course shall be tested and approved by the Soils Engineer prior to the placement of successive layers. 5. AGGREGATE BASE - The aggregate subbase shall be spread and compacted on the prepared ` subgrade in conformity with the lines, grades, and dimensions shown on the plans. The aggregate subbase material shall conform to the requirements of Section 25 of the Standard Specifications for Class 2 material. The subbase material shall be compacted to a minimum relative compaction of 95%, and it shall be spread and compacted in accordance with Section 25 of the Standard Specifications. Each layer of subbase shall be tested and approved by the Soils Engineer prior to the placement of successive layers. 6. ASPHALT CONCRETE SURFACING - Asphalt concrete surfacing shall consist of a mixture of mineral aggregate and paving grade asphalt, mixed at a central mixing plant and spread and compacted on a prepared base in conformity with the lines, grades, and dimensions shown on the plans. The viscosity grade of the asphalt shall be AR-4000. The mineral aggregate shall be Type B, %z inch maximum size, medium grading, and shall conform to the requirements set forth in Section 39 of the r 1417 No. Market Blvd., Suite 1 . Sacramento,CA 95834 • (916)568-5858 • Fax: (916)568-5813