Auburn University
Auburn University
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Auburn University
 


G10 Site Preparation

  1. Site Surveying


    1. All new project site plans shall be developed from a new topographical map developed specifically for that project; not from "as-built" information or previous project grading plans. Accurate information is essential and "special" conditions such as asbestos, lead paint, underground tank leaks, etc. shall be addressed.


    2. Survey must be performed by a land surveyor with a current professional registration in the State of Alabama.


    3. Surveyor is to allow Facilities Division to review and comment on survey before final plots.


    4. Auburn University maps are based on the State Plane Coordinate system of Alabama East Zone NAD 83 (1992) and NAVD 88. Surveys and design drawings must reference this coordinate system.


      1. If design firm needs to create its drawings of measurement other than decimal units (such as architectural), a base point of 0,0 shall be used when rescaling the drawing. The rescaling occurs due to a change in units of measurement and is a scale factor of 12. Any scaling, rotation or change in units shall be noted in writing,
        on the CAD drawing, outside the plotting limits.


    5. An Auburn University Facilities Division checklist enumerating detailed and site specific requirements will be included in the request for proposal to perform the topographic survey. A general checklist is included in Appendix I of this document; however, consult the Facilities Division for any project specific requirements.


    6. Current utilities maps may be viewed in the Facilities Division Utilities Department. However, those maps are schematic only and are not intended to relieve the surveyor of any field verification responsibility. Verification of utilities locations shall be made through ‘Alabama 1 Call’ (800) 292-5825.


    7. For new facilities, evaluate the need for an archeological survey to comply with the Alabama Historical Commission policy, revised 2002.


  2. Subsurface Exploration


    1. Auburn University will contract directly with geotechnical consultants to perform subsurface investigations unless otherwise directed by the University Architect. The consultant retained for such services must be a professional engineer with current registration in the State of Alabama.


    2. The Design Professional shall coordinate with Facilities Division project manager to develop the necessary testing locations, frequencies, depths, etc. that will be included in the request for proposal of such services.


    3. The contract documents shall show all boring locations, cross sections and soil reports. Also show all existing conduits, drains, utility lines, sewers, tunnels, cables, trees, paving, walks, foundations, and other objects or obstructions, whether in use or abandoned. Clearly indicate the project boundary.


  3. Site Clearing


    1. All objectionable growth shall be stripped. Debris resulting from stripping and clearing operations shall be promptly removed from University property.


    2. Removal of trees and shrubs shall include the removal of stumps and roots to the extent that no root greater than 3 inches in diameter remains within 5 feet of any underground structure or utility line nor under footings or paved areas. Grubbing in open areas shall include removal of stumps and 3 inch or greater roots to 2 feet below finish grade elevations.


    3. Excavations shall not be permitted which undermine the integrity of adjacent structures, paving or utilities.


  4. Backfill


    1. Backfill material shall be free of debris.


    2. Excess material or topsoil not required, or not permitted, as fill shall be moved to another site on University property for reuse, if directed by the University, or removed from University property at the contractor's expense.


    3. Specify that soils be compacted to the following minimum densities determined unless special conditions override (Percentages listed are percentage of Standard Proctor):


      1. Road beds and Parking areas: 95% up to 12" below subgrade, 100% for upper 12" below subgrade. Compaction is required for the entire subgrade area for the full width and depth of slope of embankments supporting berms and pavement.


      2. Under non-structural slabs on grade with normal loading inside the structure: 95%.


      3. Under foundations, isolated pads, and footings: 100%.


      4. Foundation backfill under planting beds and lawn: The upper 2 feet of soil below finish grade - 90% maximum with remainder of backfill being 95% if depth is less than 10 feet and 100% if depth exceeds 10 feet.


      5. Foundation backfill under pavements: 100%.


      6. Under paved pedestrian walks and courts: 95%.


      7. Backfill around manholes and other underground structures: 95% if depth is less than 10 feet; 100% if depth is more than 10 feet.


      8. Under lawn and planting areas not adjacent to structures: The upper 1 foot of soil below finish grade - 90% maximum. Remainder - 95%.


    4. Extreme care shall be taken to obtain proper compaction in areas which abut walls, curbs, adjacent slabs, and other structures where use of mechanical compactors is difficult.


    5. Field compaction tests and related laboratory analyses shall be performed by a qualified independent laboratory (conforming to American Society for Testing and Materials standards), under the supervision of a registered professional engineer specializing in soils engineering. Soils proposed for fill, backfill, and embankments shall be analyzed by the soils engineer to determine acceptability; no soil shall be placed until it is approved by the soils engineer. A representative of the testing laboratory shall provide
      continuous inspection during placement and compaction operations; tests shall be made in a quantity that will assure uniform compaction and density of each course or lift of fill.


    6. The University solicits proposals for the testing laboratory shortly after the receipt of construction bids. The Designer shall contact the University prior to this time regarding any specific requirements for the proposal request.


  5. Tree and Plant Protection


    1. A tree protection plan shall be provided for each project as determined by AU Design Lead and AU Landscape Services Department. It is desirable to save existing trees whenever possible. During design, the Design Project Manager, with help from AU Landscape Services, shall identify specifically those trees to be saved and those which must be removed. Trees which must be damaged by construction to the point that they have little chance to survive shall be considered for removal.


    2. All trees to remain are to have protective barriers set outside the drip line of the tree. Barriers shall be installed prior to any construction and shall remain until construction and site cleanup is complete. The barriers shall be of substantial material: 4 X 4 posts with 2 X 6 rails set at a minimum height of four feet. No construction material, debris or excavated material shall be stored within the barricade area.


    3. Protect root system from flooding, erosion and noxious materials in solution from spillage of construction materials.


    4. Care must be taken in excavating foundations and installation of utility lines adjacent to trees that are to be saved.


    5. Excavate within drip line of trees only where indicated on plans. If excavation will damage trees extensively, the trees shall be removed and replaced.


    6. Where trenching for utilities is required within the drip line, tunnel under or around roots by hand digging. Do not cut main lateral or tap roots. Cut smaller roots which interfere with a sharp pruning tool; do not chop or break.


    7. Do not allow exposed roots to dry out before backfill is placed; provide temporary earth or moist burlap cover.


    8. Any tree to remain that has had excavation within the drip line shall be pruned by a professional arborist according to the National Arborist Association Standards Class IV - Cutting Back or Drop Crotch Pruning


    9. Cutting back or drop crotch pruning shall consist of the reduction of tops, sides, under branches or individual limbs. This practice is to be undertaken only in cases of utility line interference, or where certain portions of the roots or root systems have been severed or severely damaged.


    10. The following specifications shall apply:


      1. All cuts shall be made sufficiently close to the trunk or parent limb, without cutting into the branch collar or leaving a protruding stub, so that closure can readily start under normal conditions. All cuts shall be clean. It is necessary to precut branches too heavy to handle to prevent splitting or peeling the bark. Where necessary, to prevent tree or property damage, branches shall be lowered to the ground by proper ropes or equipment.


      2. Remove the weaker, least desirable, crossed or rubbed branches. Such removal shall not leave holes in the general outline of the tree.


      3. Generally, in reducing size (cutting back) not more than one-third of the total area shall be reduced at a single operation. When cutting back, only drop crotch as much as necessary. Where practical, avoid cutting back to small suckers. All effort shall be made to cut back to a lateral, one-third the diameter of the cut being made. In
        reducing overall size, attention is to be given to the symmetrical appearance. Top is to be higher and sides reduced in order to maintain a tree-like form. When cutting back trees, one shall have in mind to make them shapely and typical of their species.


      4. On thin bark trees, just enough limbs shall be removed to get the effect wanted without admitting too much sunlight to the trunk of the tree or the top of large branches. Care shall be taken with the following species: lindens, maples, beeches, apples, oaks, and other trees susceptible to sunscald, growing in different
        geographical areas. The damage may be minimized by doing work on susceptible species during the dormant season.


      5. In lifting the lower bottom branches of trees for under clearance, care shall be given to symmetrical appearance, and cuts shall not be made so large that they will prevent normal sap flow.


      6. Periodical drop crotching or cutting back of silver maples, poplars, and other trees with brittle and soft wood is an established practice and has proven beneficial in maintaining the safety of these trees over long periods of growth. Other trees with
        soft and brittle wood growing in different geographic areas may be specifically named when it is common practice to control growth by cut-back. An alternate method in some situations for maintaining the safety of these trees would be cabling and bracing.


      7. Maintain existing grade outside drip line of trees, unless otherwise indicated on plan. Do not leave open excavations in the vicinity of protected trees for longer than 2 days to prevent soil moisture reduction.


    11. Fertilization


      1. Where tree roots within the drip line will be covered with asphalt or concrete, feeders shall be installed as recommended by the National Arborist Association Standards.


      2. Install extended feeders where construction of wells or retaining walls is required within the drip line.


      3. The design must provide a yard hydrant, irrigation system or other convenient water source adjacent to trees that remain.


      4. The specifications shall define proper fertilization and the contractor shall fertilize
        affected trees during construction.


    12. Repairs to Damaged Trees


      1. Repairs to damaged trees shall be performed by a professional arborist.


      2. Trees damaged beyond repair or that do not survive will be removed by the contractor. A replacement cost will be determined by the Designer and paid by the contractor. The University will reserve the option of having the contractor replace the tree with one of equal size and quality.


  6. Grading


    1. Finish grade slopes shall be shallow enough to allow mowing (generally 1:3 or less); steeper slopes will be permitted only in areas where maintenance-free erosion control (groundcover planting, rip-rap, etc.) is planned.


    2. All areas disturbed by construction operations and not covered by building, paving, etc. shall be fine graded and temporarily seeded. Sod is to be used for permanent lawns.


  7. Demolition


    1. Foundations of existing structures shall be removed.


    2. Every reasonable effort shall be made to avoid blasting if structure to be demolished is in close proximity to other structures. If blasting is utilized, control dust and excessive noise when surroundings require. Document conditions of adjacent structures when collateral damage is possible. Seismographic monitoring may be required on adjacent buildings. Prior approval is required for any blasting demolition.


  8. Site Remediation


    1. Hazardous materials survey and remediation are assumed to be separate from building design unless otherwise requested by the University Architect and/or Department of Risk Management and Safety.


    2. Auburn University will contract directly with environmental consultants to perform the necessary assessments and remediation, if applicable. The consultant retained for such services must be a professional engineer with current registration in the State of Alabama in addition to any certifications required by local, state, and federal regulatory
      agencies.


  9. Erosion control


    1. All design and construction activity must be performed in compliance with the most current ALOA Erosion and Sediment Control Policy as provided by the University’s Department of Risk Management and Safety, in addition to complying with all local, state, and federal regulatory requirements.


    2. The Erosion and Sedimentation Control Plan shall follow the Alabama Handbook for Erosion Control, Sediment Control, and Stromwater Management on Construction Sties and Urban Areas and must be reviewed and approved by the Office of Risk Management
      and Safety.


    3. All Alabama Department of Environmental Management (ADEM) and National Pollutant Discharge Eliminations Systems (NPDES) permitting and sampling documentation must be prepared by the civil engineering consultant. The civil engineering consultant must be a registered professional engineer in the State of Alabama as well as meeting any other requirements of a certifying professional as set forth by ADEM.


    4. The contractor shall be responsible for obtaining a “Notice of Registration” from ADEM. The Contractor shall provide proof of ADEM registration to the Owner prior to initiating any earthwork. The Contractor shall be responsible for all monitoring, inspections, etc. to assure the Owner that the site is at all times in accordance with ADEM Rules and Regulations. Documentation of QCI and QCP inspections shall be provided to the Owner.


    5. All inspections are to be performed by the civil engineering consultant.

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