312200-RIB-Grading-05-03-2024.pdf
PDF 68 KB Posted
- Attached to
- Rehabilitation of Lift Station 12
- Solicitation number
- 24-030
- Issued by
- Charles County, Florida
About this file
This document is a Section 312200 Grading Specification for the Gulf Boulevard Landscape Phase 3 project located in Navarre, Florida, prepared by WAS Design, Inc. The specification provides detailed instructions for grading activities, including removal of topsoil, rough grading for site structures, and finish grading. The document outlines comprehensive requirements for site preparation, including identifying utility locations, protecting existing site features, removing and replacing unsuitable soils, and preparing surfaces for landscaping.
The specification includes precise technical requirements for topsoil placement, with specific guidelines for different areas such as sodded sections (3 inches) and planting areas (4 inches). Tolerances are strictly defined, with the top surface of subgrade allowed to vary plus or minus 1-3/16 inches from required elevation, and the finish grade permitted to vary plus or minus 1/2 inch. The document emphasizes careful handling of existing vegetation, requiring manual spreading near plants and buildings, and providing instructions for repairing any damage to trees or other existing site features. Additional provisions cover field quality control, with compaction density testing referenced, and a requirement to leave the site clean and raked, prepared for subsequent landscaping work.
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Text version
Gulf Boulevard Landscape Phase 3 Navarre, Florida
246024-001
Grading WAS Design, Inc.
312200 - 1
SECTION 312200
GRADING
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Removal of topsoil.
B. Rough grading the site for site structures.
C. Finish grading.
1.02 RELATED REQUIREMENTS
A. Section 312323 - Fill: Filling and compaction.
B. Section 329223 - Sodding: Finish ground cover.
C. Section 329300 - Plants: Topsoil in beds and pits.
PART 2 PRODUCTS
2.01 MATERIALS
A. Topsoil: See Section 312323.
PART 3 EXECUTION
3.01 EXAMINATION
A. Verify that survey bench mark and intended elevations for the Work are as indicated.
B. Verify the absence of standing or ponding water.
3.02 PREPARATION
A. Identify required lines, levels, contours, and datum.
B. Stake and flag locations of known utilities.
C. Locate, identify, and protect from damage above- and below-grade utilities to remain.
D. Provide temporary means and methods to remove all standing or ponding water from areas prior to grading.
E. Protect site features to remain, including but not limited to bench marks, survey control points, existing structures, fences, sidewalks, paving, and curbs, from damage by grading equipment and vehicular traffic.
F. Protect trees to remain by providing substantial fencing around entire tree at the outer tips of its branches; no grading is to be performed inside this line.
G. Protect plants, lawns, and other features to remain as a portion of final landscaping.
3.03 ROUGH GRADING
A. Remove topsoil from areas to be further excavated, re-landscaped, or re-graded, without mixing with foreign materials.
B. Do not remove topsoil when wet.
C. Remove subsoil from areas to be further excavated, re-landscaped, or re-graded.
D. Do not remove wet subsoil , unless it is subsequently processed to obtain optimum moisture content.
E. When excavating through roots, perform work by hand and cut roots with sharp axe.
F. Stability: Replace damaged or displaced subsoil to same requirements as for specified fill.
G. Remove and replace soils deemed unsuitable by classification and which are excessively moist due to lack surface water control.
3.04 FINISH GRADING
A. Before Finish Grading:
Gulf Boulevard Landscape Phase 3 Navarre, Florida
246024-001
Grading WAS Design, Inc.
312200 - 2
1. Verify building and trench backfilling have been inspected.
2. Verify subgrade has been contoured and compacted.
a. Finish grading contractor shall receive rough grade within +/-1" of finish grade.
B. Remove debris, roots, branches, stones, in excess of 1/2 inch in size. Remove soil contaminated with petroleum products.
C. Where topsoil is to be placed, scarify surface to depth of 3 inches.
D. In areas where vehicles or equipment have compacted soil, scarify surface to depth of 3 inches.
E. Place topsoil in areas where sodding and planting are indicated.
F. Place topsoil where required to level finish grade.
G. Place topsoil to the following compacted thicknesses:
1. Areas to be Sodded: 3 inches .
2. Planting Areas: 4 inches.
H. Place topsoil during dry weather.
I. Remove roots, weeds, rocks, and foreign material while spreading.
J. Near plants and buildings spread topsoil manually to prevent damage.
K. Fine grade topsoil to eliminate uneven areas and low spots. Maintain profiles and contour of subgrade.
L. Lightly compact placed topsoil.
M. Maintain stability of topsoil during inclement weather. Replace topsoil in areas where surface water has eroded thickness below specifications.
3.05 TOLERANCES
A. Top Surface of Subgrade: Plus or minus 0.10 foot (1-3/16 inches) from required elevation.
B. Top Surface of Finish Grade: Plus or minus 0.04 foot (1/2 inch).
3.06 REPAIR AND RESTORATION
A. Existing Facilities, Utilities, and Site Features to Remain: If damaged due to this work, repair or replace to original condition.
B. Trees to Remain: If damaged due to this work, trim broken branches and repair bark wounds; if root damage has occurred, obtain instructions from Landscape Architect as to remedy.
C. Other Existing Vegetation to Remain: If damaged due to this work, replace with vegetation of equivalent species and size.
3.07 FIELD QUALITY CONTROL
A. See Section 312323 for compaction density testing.
3.08 CLEANING
A. Leave site clean and raked, ready to receive landscaping.
END OF SECTION
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