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ST. BARBARA CATHOLIC SCHOOL TASK 2 75-24272-01 <br />DIOCESE OF ORANGE SEPTEMBER 12TH, 2024 <br />SANTA ANA, CA BID & PERMIT SET <br /> <br />CONCRETE PAVING 321313 - 7 <br /> <br /> <br />PART 3 - EXECUTION <br /> <br />3.1 SURFACE PREPARATION <br />A. Areas to be paved shall be compacted and brought to subgrade elevation per soils report <br />before work of this section is performed. Final fine grading, filling, and compaction of areas <br />to receive paving, as required to form a firm, uniform, accurate, and unyielding subgrade at <br />required elevations and to required lines, shall be done under this Section. <br />B. Existing subgrade material which will not readily compact as required shall be removed and <br />replaced with satisfactory materials. Additional materials needed to bring subgrade to <br />required line and grade and to replace unsuitable material removed shall be material <br />conforming to this Section. <br />C. Subgrade of areas to be paved shall be re-compacted per soils report. <br />D. Excavation required in pavement subgrade shall be completed before fine grading and final <br />compaction of subgrade are performed. Where excavation must be performed in completed <br />subgrade, base, or pavement, subsequent backfill and compaction shall be performed per soils <br />report. <br />E. Areas being graded or compacted shall be kept shaped and drained during construction. Ruts <br />greater than or equal to 2 in. deep in subgrade, shall be graded out, reshaped as required, and <br />re-compacted before placing pavement. <br />F. Materials shall not be stored or stockpiled on subgrade. <br />G. Disposal of debris and other material excavated under this section, and material unsuitable for <br />or in excess of requirements for completing work of this section shall be disposed of off-site. <br />H. Prepared subgrade will be inspected by Soils Engineer. Subgrade shall be approved before <br />installation of gravel base course. Disturbance to subgrade caused by inspection procedures <br />shall be repaired under this section of the specification. <br /> <br />I. Proof-roll subgrade or base surface prepared by others to check for unstable areas and verify <br />need for additional compaction. Do not begin paving work until such conditions have been <br />corrected and are ready to receive paving. <br /> <br />J. Herbicide Treatment: Apply chemical weed control agent in strict compliance with <br />manufacturer's recommended dosages and application instructions. Apply to compacted, dry <br />subgrade prior to installation of base course. <br /> <br />3.2 EDGE FORMS AND SCREED CONSTRUCTION <br /> <br />A. Set, brace, and secure edge forms, bulkheads, and intermediate screed guides for paving to <br />required lines, grades, and elevations. Install forms to allow continuous progress of work and <br />so that forms can remain in place at least 24 hours after concrete placement. <br /> <br />B. Check completed formwork and screeds for grade and alignment to following tolerances: <br />1. Top of Forms: Not more than 1/8 inch in 10 feet.