**November 21, 1997**

Contract \# **TW-0928**

SPECIAL SPECIFICATION

SECTION 02200-S

[EARTHWORK]{.underline}

Page

[PART 1 - GENERAL]{.underline}

1.01 Description Of Work

1.02 References

1.03 Definitions

1.04 Submittals

1.05 Quality Assurance

1.06 Project Conditions

PART 2 - PRODUCTS

2.01 Soil Materials

2.02 Accessories 7

PART 3 - EXECUTION

3.01 Preparation

3.02 Clearing And Grubbing

3.03 Excavation

3.04 Backfill And Fill

3.05 Compaction

3.06 Grading

3.07 Building Slab Drainage Course

3.08 Maintenance 14

3.09 Disposal Of Excess And Waste Material

3.10 Record Drawings

SPECIAL SPECIFICATION

SECTION 02200-S

[EARTHWORK]{.underline}

# PART 1 - GENERAL

## 1.01 [DESCRIPTION OF WORK]{.underline}

A. [Earthwork includes]{.underline}, but is not limited to clearing,
preparing, grading, excavating, filling, backfilling and compacting of
soils as necessary to accomplish finished construction as indicated on
the drawings.

B. [Excavation for Mechanical/Electrical Work]{.underline}: Excavation
and backfill required in conjunction with underground mechanical and
electrical utilities and buried mechanical and electrical appurtenances
is included as work of this section.

C. [Related Section]{.underline}: Refer to Division 3, Section
"Cast-In-Place Concrete" for general excavation requirements.

## 1.02 [REFERENCES]{.underline}

A. [American Society for Testing and Materials (ASTM)]{.underline}

C131 Test Method for Resistance to Degradation of Small-Size Coarse
Aggregate by Abrasion and Impact in the Los Angeles Machine

C136 Method for Sieve Analysis of Fine and Coarse Aggregates

D1557 Test Methods for Moisture-Density Relations of Soils and
Soil-Aggregate Mixtures Using 10-lb (4.54-kg) Rammer and 18-in. (457-Mm)
Drop

D4253 Test Methods for Maximum Index Density of Soils Using a Vibratory
Table

D4254 Test Methods for Minimum Index Density of Soils and Calculation of
Relative Density

D4318 Standard Test Method for Liquid Limit, Plastic Limit and
Plasticity Index of Soils.

B. [Code of Federal Regulations (CFR)]{.underline}

Title 29 Part 1926.650 Safety and Health Regulations for Construction

## 1.03 [DEFINITIONS]{.underline}

A. [Borrow]{.underline}: Soil material obtained off-site when sufficient
approved soil material is not available from excavations.

B. [Drainage Fill]{.underline}: Course of washed granular materials
supporting slab-on-grade, placed to cut off upward capillary flow of
pore water.

C. [Excavation]{.underline}: The removal of material encountered to
subgrade elevations and the reuse or disposal of material removed.

D. [Structures]{.underline}: Building, footing, foundations, retaining
walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or
other man-made stationary features constructed above or below ground
surface.

E. [Subgrade]{.underline}: The uppermost surface of an excavation or the
top surface of a fill or backfill immediately below subbase, drainage
fill, or topsoil material.

F. [Unauthorized Excavation]{.underline}: Removing materials beyond
indicated subgrade elevations or dimensions without direction by the
Sandia Delegated Representative (SDR).

G. [Utilities]{.underline}: On site underground pipes, conduits, ducts,
and cables, as well as underground services within building lines.

H. [Flowable Concrete Backfill]{.underline}: Controlled low-strength
flowable backfill with no less than 6 inch (152 mm) slump and no more
than 10 inch (254 mm) slump.

I. [Subbase Course]{.underline}: The layer placed between the subgrade
and base course in a paving system or the layer placed between the
subgrade and surface of a pavement or walk.

J. [Base Course]{.underline}: The layer placed between the subbase and
surface pavement in a paving system.

## 1.04 [SUBMITTALS]{.underline}

A. [General]{.underline}: Submit in accordance with provision of section
01300, \"Descriptive Submittals.\"

B. [Product Data]{.underline}: Submit product data for the following
materials and items. Include laboratory test reports and other data to
show compliance with specifications (including specified standards).

Each type of plastic warning tape.

C. [Test Reports]{.underline}: Submit test reports required under
Quality Assurance as well as the following:

1\. Laboratory analysis of each soil material proposed for fill and
backfill from on-site and borrow sources.

2\. One \"Optimum Moisture - Maximum Density Curve\" for each soil
material.

3\. Report of actual unconfined compressive strength and/or results of
bearing tests of each stratum tested.

D. [Traffic Plan]{.underline}: Contractor shall submit a proposed
traffic plan prior to start of construction if required in the Contract
documents. Traffic plan shall consist of the following:

1\. How street(s) will be flagged and barricaded.

2\. How street will be maintained.

3\. Placement and size of steel plates to be used.

4\. Duration of street closure.

## 1.05 [QUALITY ASSURANCE]{.underline}

[Sandia National Laboratories (SNL) will engage]{.underline} a soil
testing and inspection service for quality control testing during
earthwork operations. Should initial tests of Contractor's work indicate
noncompliance with the specification, the Contractor shall make
corrections as directed. Retesting required to determine compliance with
this specification shall be performed by an approved testing laboratory
at the Contractor\'s expense.

## 1.06 [PROJECT CONDITIONS]{.underline}

A. [Existing Utilities]{.underline}: Locate existing underground
utilities in areas of work. If utilities are to remain in place, provide
adequate means of support and protection during earthwork operations.
Should uncharted, or incorrectly charted, piping or other utilities be
encountered during excavation, notify the SDR. Do not interrupt existing
utilities without following the Standard Facilities Engineering
procedures for utility outage. Provide a minimum of 2 weeks\' notice
when practical, and await notice to proceed before interrupting any
utilities.

B. [Known Utilities]{.underline}: Type and location of known existing
utilities and obstructions which are shown on the drawings are
approximate, but are based on the best information available. Protect
these and other utilities which are made known to General Contractor
prior to excavation. Determine exact location of all known utilities by
performing exploratory hand excavation to expose the utility. Hand
excavate at least 5 feet (1.5 m) each side of the indicated location
unless the utility is located sooner. Remainder of excavation shall be
completed only after the SDR has approved location of known utilities.
When electrified utilities are to be removed, safety precautions
specified under the procedure for unknown utilities shall be adhered to.

If movement of traffic or public safety makes it necessary to backfill
an exploratory excavation after the utility has been located, a suitable
marker shall be installed to permanently mark the location.

C. [Unknown Utilities]{.underline}: In the event that unidentified
conduits, concrete encased ducts or pipes are encountered that must be
removed, all work on that part of the job will stop until the SDR is
contacted and resumption of work is authorized.

D. [Underground Telephone Cable]{.underline}: Where an underground
telephone cable is shown on the Contract drawings, **[NO]{.underline}**
excavation is to be attempted in that vicinity until the line is
properly located and staked by the Air Force Communications Service
(AFCS). If an unknown cable is identified as a telephone cable during an
excavation, all excavation is to cease until the AFCS identifies and
properly stakes the cable locations in the vicinity of the excavation.
(For assistance call 844-8411.)

E. [Use of Explosives]{.underline}: The use of explosives is not
permitted.

F. [Protection of Persons and Property]{.underline}: Flag and barricade
open excavations occurring as part of this work. Protect structures,
utilities, sidewalks, pavements and other facilities from damage caused
by settlement, lateral movement, undermining, washout, and other hazards
created by earthwork operations.

1\. Contractor shall be responsible for protection of personnel and
property in the work area for the duration of the Contract.

2\. Keep excavation free of water from any source at all times. Provide
and operate pumps if necessary. Remove water from site in manner to
avoid damage to adjoining property.

G. [Pollution Control]{.underline}: Use water sprinkling, temporary
enclosures, and other suitable methods to limit amount of dust and dirt
rising and scattering in the air to lowest practical level.

1\. Comply with governing regulations pertaining to environmental
protection. Obtain digging permit from the SDR and earth disturbance
notification from City of Albuquerque, when required in the Contract,
prior to beginning any earthwork.

2\. Clean adjacent structures and improvements of dust, dirt, and debris
caused by earthworking operations, as directed by the SDR. Return
adjacent areas to conditions existing prior to the start of the work.

H. [Street Crossings]{.underline}: Excavations shall be conducted in a
manner so as to cause the least interruption of traffic. Maintain half
the width of the street open at all times unless prior approval from the
SDR has been given to close the street. Request to close a street must
be presented in writing to the SDR at least 2 weeks prior to the
requested closing date.

# PART 2 - PRODUCTS

## 2.01 [SOIL MATERIALS]{.underline}

A. [General]{.underline}: Unless otherwise noted on the Contract
documents, the existing site soils shall be used for fill and backfill
materials. If the on-site soils are found by laboratory test to be
unsuitable for fill and backfill material, contact the SDR for
direction.

Any additional fill material used must conform with the applicable
requirements of this section.

B. [Structural Fill]{.underline}: Structural fill shall consist of a
controlled fill placed in areas indicated on the drawings.

1\. Structural fill material shall consist of soils that conform to the
following physical characteristics:

Sieve Size Percent Passing

[(Square Openings)]{.underline} [by Weight]{.underline}

3 inch (76 mm) 100

No. 4 (4.75 mm) 50 - 100

No. 200 (600 μm) 15-45

2\. The plasticity index of material, as determined in accordance with
ASTM D4318 shall not exceed 12 .

3\. The fill material shall be free from roots, grass, other vegetable
matter, clay lumps, rocks larger than 3 inches (76 mm), or other
deleterious materials. Stripped top soil shall not be used in structural
fill.

C. [Retaining Wall Backfill]{.underline}: Retaining wall backfill
material shall be free-draining and conform to fill quality requirements
as follows:

Sieve Size Percent Passing

[(Square Openings)]{.underline} [by Dry Weight]{.underline}

3/4 inch (19.1 mm) 100

No. 4 (4.75 mm) 30 - 80

No. 200 (600 μm) 0 - 5

The material should have a plasticity index of less than 5 when tested
in accordance with ASTM D4318.

D. [Granular Base]{.underline}

1\. Granular base shall meet the following grading requirements as
determined in accordance with ASTM C136.

Sieve Size Percent Passing

[(Square Openings)]{.underline} [by Dry Weight]{.underline}

1 inch (25 mm) 100

3/4 inch (19.1 mm) 80 - 100

No. 4 (4.75 mm) 30 - 60

No. 200 (600 μm) 3 - 10

2\. The granular base shall have a plasticity index of no greater than 3
when tested in accordance with ASTM D4318. The coarse aggregate shall
have a percent of wear, when subjected to the Los Angeles abrasion test
(ASTM C131), of no greater than 50. Reconstituted asphalt base course is
allowable when meeting these gradations.

## 2.02 [ACCESSORIES]{.underline}

[Detectable Warning Tape]{.underline}: Provide a polyethylene film
detectable warning tape manufactured for marking and identifying
underground utilities. Tape shall be 6 inches (152 mm) wide and a
minimum metallic foil core of 0.5 mils (0.013 mm) and shall be
reinforced consisting of 9.0 mil (0.23 mm) total thickness. Letters
shall be black in color and 1 inch (25 mm) minimum in size.

A. [Color Codes]{.underline}:

1.  Electric - Red

2.  Gas - Yellow

3.  Water - Blue

4.  Steam - Yellow

5.  Sewer - Green

6.  Telephone - Orange

B. [Text]{.underline}: The lettering shall be repeated continuously for
the full length of the tape as follows:

**CAUTION CAUTION CAUTION**

**BURIED (UTILITY TYPE) LINE BELOW**

# PART 3 - EXECUTION

## 3.01 [PREPARATION]{.underline}

A. [Protect structures]{.underline}, utilities, sidewalks, pavements,
and other facilities from damage caused by settlement, lateral movement,
undermining, washout and other hazards created by earthwork operations.

B. [Protect subgrades]{.underline} and foundation soils against freezing
temperatures or frost and excessive drying or wetting. Provide
protective insulating materials as necessary.

C. [Protection of Personnel]{.underline}: Flag and barricade open
excavations occurring as part of this work.

D. [Provide erosion control measures]{.underline} to prevent erosion or
displacement of soils and discharge of soil-bearing water run-off or
airborne dust to adjacent properties and walkways.

## 3.02 [CLEARING AND GRUBBING]{.underline}

A. [General]{.underline}: Clearing and grubbing will be required for all
areas indicated on the drawings to be excavated, improved on or which
fill is to be constructed. All cleared and grubbed materials, including
trash, shall be deposited at the Kirtland Air Force Base Landfill or as
directed by the SDR.

B. [Clearing and Grubbing]{.underline}: Clearing shall consist of
removal and disposal of trees, shrubbery and other vegetation as well as
brush and rubbish within the areas to be improved and constructed upon.
Grubbing shall consist of removal and disposal of stumps, matted roots,
and roots larger than 2 inches (51 mm) in diameter from within 6 inches
(152 mm) of the surface of areas on which fills are to be constructed
except in roadways. Materials as described above within 18 inches (457
mm) of finished subgrade of roadways, in either cut or fill sections,
shall be removed. Areas disturbed by grubbing will be filled as
specified in Paragraph 3.04.

C. [Grass and Topsoil]{.underline}: Grass, grass roots and incidental
topsoil shall not be left beneath fill area, nor shall this material be
used as fill or backfill material. However, with approval of the SDR,
topsoil may be stockpiled and later used in the top 4 inches (102 mm) of
fill outside roads, building pads, walks, or structures.

## 3.03 [EXCAVATION]{.underline}

A. [General]{.underline}: Excavate to contours, shapes, dimensions and
elevations required for the work indicated on the drawings; extend
sufficiently to permit form placing, inspection and removal.
Undercutting is prohibited.

1\. Earth excavation shall consist of excavation and removal of suitable
soils for use as structural fill as well as satisfactory disposal of all
vegetation, debris and deleterious materials encountered within area to
be graded or in a borrow area, or any combination thereof.

2\. Excavated areas shall be continuously maintained in a manner so that
surfaces shall be smooth and have sufficient slope to allow water to
drain from surface.

3\. All existing man-made fill shall be removed in its entirety.

4\. Width of excavations shall be to dimensions indicated on drawings,
with additional space allowed as required for erection and stripping of
forms, and inspection of related work.

B. [Unauthorized excavation]{.underline} consists of removal of
materials beyond indicated subgrade elevations or dimensions without
specific direction of the SDR. Unauthorized excavation, as well as
remedial work directed by the SDR, shall be at Contractor\'s expense.

1\. Under footings, foundation bases, or retaining walls, fill
unauthorized excavation by extending indicated bottom elevation of
footing or base to excavation bottom, without altering required top
elevation. Flowable concrete fill (2000 psi minimum (14 MPa)) may be
used to bring elevations to proper position, when acceptable to the SDR.

2\. Elsewhere, backfill and compact unauthorized excavations as
specified for authorized excavations of same classifications, unless
otherwise directed by the SDR.

C. [Additional Excavation]{.underline}: When excavation has reached
required subgrade elevations, notify the SDR who will make an inspection
of conditions.

1\. If unsuitable bearing materials are encountered at required subgrade
elevations, immediately notify the SDR for direction.

2\. Removal of unsuitable material and its replacement shall be as
directed by the SDR.

D. [Stability of Excavations]{.underline}: Slope sides of excavations
where possible in accordance with OSHA 1926.650. Shore and brace where
sloping is not possible because of space restrictions or stability of
material excavated. Maintain sides and slopes of excavations in safe
condition until completion of backfilling.

Shore all vertical cuts greater than 5 feet (1.5 m) in depth.

E. [Dewatering]{.underline}: Prevent surface water and subsurface or
ground water from entering excavations, from ponding on prepared
subgrades, and from flooding project site and surrounding area. Remove
water to prevent softening of foundation bottoms, undercutting footings,
and soil changes detrimental to stability of subgrades and foundations.

F. [Storage of Soil Materials]{.underline}: Stockpile excavated
materials acceptable for backfill and fill soil materials, including
acceptable borrow materials at a location on site as directed by the
SDR. Stockpile soil materials without intermixing. Place, grade, and
shape stockpiles to drain surface water. Cover to prevent wind-blown
dust.

G. [Excavation for Structures]{.underline}: Conform to elevations and
dimensions shown within a tolerance of plus or minus 0.10 foot (30.5 mm)
and extending a sufficient distance from footings and foundations to
permit placing and removal of concrete formwork, installation of
service, other construction, and for inspection.

H. [Excavation for Pavements]{.underline}: Cut surface under pavements
to comply with cross-sections, elevations and grades as shown.

I. [Excavation for Utility Trenches]{.underline}: Dig trenches to the
uniform width required for particular item to be installed, sufficiently
wide to provide ample working room. Provide minimum 6 inch (152 mm)
clearance on both sides of pipe or conduit.

1\. Excavate trenches to depth indicated or required. Carry depth of
trenches for piping to establish indicated flow lines and invert
elevations.

2\. Where rock is encountered, carry excavation 6 inches (152 mm) below
specified elevation and backfill with a 6 inch (152 mm) layer of crushed
stone, gravel, or sand prior to pipe installation.

3\. Grade bottoms of trenches as indicated, notching under pipe bells to
provide solid bearing for entire body of pipe.

4\. Do not backfill trenches until tests and inspections have been made
and backfilling authorized by the SDR. Use care in backfilling to avoid
damage or displacement of pipe systems.

5\. For grade dependent utilities, the entire length of trench between
manholes or terminations shall be opened prior to placement of pipe. If
existing utilities conflict with the new line, adjust the grade or
relocate existing utility accordingly at the direction of the SDR.

6\. As-built any changes found or made and return to SNL before job
completion.

J. [Cold Weather Protection]{.underline}: Protect excavation bottoms
against freezing when atmospheric temperature is less than 35 degrees F
(1.66 degrees C).

K. [Overexcavation for Non-Basement Areas:]{.underline} Overexcavate
soils in non-basement areas of the building to such an extent as to
provide for a minimum thickness of 5 feet (1.5 m) of compacted fill
beneath the base of the mat.

## 3.04 [BACKFILL AND FILL]{.underline}

A. [General]{.underline}: Place acceptable soil material in layers to
required subgrade elevations, for each area classification listed below:

1\. In excavations, use satisfactory excavated or borrow material.

2\. Under building slabs, use granular base material, or as noted on
drawing.

3\. Behind retaining walls, use retaining wall backfill material.

4\. Flowable concrete backfill may be used in lieu of soil when the
ability to compact is affected by conditions such as safety or tight
conditions.

B. [Backfill excavation]{.underline} as promptly as work permits, but
not until completion of the following:

1\. Acceptance of construction below finish grade including, where
applicable, dampproofing, waterproofing, and perimeter insulation.

2\. Inspection, testing, approval, recording locations and as-builting
of underground utilities.

3\. Removal of concrete formwork.

4\. Removal of temporary shoring and bracing, and backfilling of voids
with satisfactory materials.

5\. Removal of trash and debris from excavation.

6\. Installing permanent or temporary horizontal bracing at horizontally
supported walls.

C. [Preparation]{.underline}: Remove vegetation, debris, unsatisfactory
soil materials, obstructions, and deleterious materials from ground
surface prior to placement of fills. Plow, strip, or break-up sloped
surfaces steeper than one vertical to four horizontal so that fill
material will bond with existing surface.

Prior to placement of fill, notify the SDR who will make an inspection
of conditions to verify satisfactory removal of unsatisfactory
materials.

D. [Placement and Compaction]{.underline}: Place backfill and fill
materials in layers not more than 8 inches (203 mm) in loose depth for
material compacted by heavy compaction equipment, and not more than 6
inches (152 mm) loose depth for material compacted by hand-operated
tampers.

1\. Before compaction, moisten or aerate each layer as necessary to
provide optimum moisture content. Compact each layer to required
percentage of maximum dry density or relative dry density for each area
classification. Do not place backfill or fill material on surfaces that
are muddy, frozen, or contain frost or ice.

2\. Place backfill and fill materials evenly adjacent to structures,
piping or conduit to required elevations. Take care to prevent wedging
action of backfill against structures or displacement of piping or
conduit by carrying material uniformly around structure, piping or
conduit to approximately same elevation in each lift.

E. [Utility Trench Backfil]{.underline}l: Place and compact bedding
course on rock and other unyielding bearing surfaces and to fill
unauthorized excavations. Shape bedding course to provide continuous
support for bells, joints, and barrels of pipes and for joints,
fittings, and bodies of conduits.

1\. Backfill trenches with concrete where trench excavations pass under
column or wall footings. Concrete shall fill from the bottom of the
trench to the bottom of the footing and extend the full width of the
trench to 18 inches (457 mm) beyond the edge(s) of the footing.

2\. Provide 4-inch (102 mm) thick concrete base slab support for piping
or conduit less than 30 inches (762 mm) below surface of roadways. After
installation and testing, completely encase piping or conduit in a
minimum of 4 inches (102 mm) of concrete before backfilling or placing
roadway subbase.

3\. Install continuous detectable warning tape at all utility trenches
as they are backfilled. Locate the tape approximately 36 inches (914 mm)
above the utility line, but not less than 12 inches (305 mm) below
grade. Install it directly above and parallel to the utility line with
the printed side up. Take necessary precautions to avoid distorting or
misplacing the tape as backfill continues.

When backfilling gas utility trenches, follow these procedures: Install
an electrically conductive 12 gage (0.0808 inch) (2.052 mm) copper wire
with the pipe. This wire and all its underground connections shall be
insulated to prevent corrosion. This wire shall be placed above the pipe
with a 12 inch (305 mm) layer of backfill separating it from the top of
the pipe. A detectable warning tape shall then be covered with 18 inches
(457 mm) of backfill minimum and an additional detectable warning tape
shall be placed a minimum of 12 inches (305 mm) below finish grade.
(Minimum gas pipe depth is 48 inches (1.2 m)).

## 3.05 [COMPACTION]{.underline}

A. [General]{.underline}: Control soil compaction during construction,
providing minimum percentage of density specified for each area
classification indicated below.

B. [Percentage of Maximum Density Requirements]{.underline}: Compact
soil to not less than the following percentages of maximum density for
soils which exhibit a well-defined moisture-density relationship
(cohesive soils) determined in accordance with ASTM D1557 and not less
than the following percentages of relative density, determined in
accordance with ASTM D4253 and D4254, for soils which will not exhibit a
well-defined moisture-density relationship (cohesionless soils).

1\. [Under Structures, Building Slabs, Steps, Pavement And Curb And
Gutter]{.underline}: Compact the top 12 inches (305 mm) below subgrade
and each layer of backfill or fill material at 95 percent maximum dry
density unless otherwise indicated on the drawings. (Exception: Utility
trenches under pavements; compact the top 6 inches (152 mm) at 95
percent maximum dry density and each layer of backfill or fill material
below subgrade at 90 percent maximum dry density unless otherwise
indicated on the drawings.) Where the native soil is cohesionless,
compact top 12 inches (305 mm) to a minimum relative density of 72
percent.

2\. [Under Lawn or Unpaved Areas]{.underline}: Compact the top 6 inches
(152 mm) below subgrade and each layer of backfill or fill material at
85 percent maximum dry density for clayey soils (more than 35 percent
passing No. 200 sieve) and 90 percent relative density for all other
soils.

3\. [Under Walkways]{.underline}: Compact the top 6 inches (152 mm)
below subgrade and each layer of backfill or fill material at 90 percent
maximum dry density for clayey material or 90 percent relative density
for all other material.

4\. [Under Mat-Type Foundations:]{.underline} After excavation is
complete, the exposed ground surface beneath the mat-type foundation
shall be scarified, brought to near the optimum moisture content and
compacted. Under the non-basement area, the entire area shall be brought
up to finished subgrade elevation with compacted structural fill.
Compaction of the native soils and structural fill shall be accomplished
to a minimum of 98 percent maximum dry density.

C. [Moisture Control]{.underline}: Moisture content at the time of
compaction shall be plus or minus 2 percent of optimum moisture content.
Where subgrade or layer of soil material must be moisture conditioned
before compaction, uniformly apply water to surface of subgrade, or
layer of soil material, to prevent free water appearing on surface
during or subsequent to compaction operations. Remove and replace, or
scarify and air dry, soil material that is too wet to permit compaction
to specified density.

## 3.06 [GRADING]{.underline}

A. [General]{.underline}: Uniformly grade areas within limits of grading
under this section, including adjacent transition areas. Smooth finished
surfaces within specified tolerances, compact with uniform levels or
slopes between points where elevations are indicated, or between such
points and existing grades.

B. [Grading Outside Building Lines]{.underline}: Grade areas adjacent to
building lines to drain away from structures and to prevent ponding.
Finish surfaces free from irregular surface changes and as follows:

1\. [Lawn or Unpaved Areas]{.underline}: Finish areas to receive topsoil
to within not more than 0.10 foot (30.5 mm) above or below required
subgrade elevations.

2\. [Walks]{.underline}: Shape surface of areas under walks to line,
grade and cross-section, with finish surface not more than 1/2 inch
(12.7 mm) above or below required subgrade elevation.

3\. [Pavements]{.underline}: Shape surface of areas under pavement to
line, grade and cross-section, with finish surface not more than 1/2
inch (12.7 mm) above or 1 inch (25 mm) below required subgrade
elevation.

C. [Grading Surface of Fill Under Building Slabs]{.underline}: Grade
smooth and even, free of voids, compacted as specified, and to required
elevation. Provide final grades within a tolerance of 1/2 inch (12.7 mm)
when tested with a 10 foot (3 m) straightedge.

D. [Compaction]{.underline}: After grading, compact subgrade surfaces to
the depth and indicated percentage of maximum or relative density for
each area classification.

## 3.07 [BUILDING SLAB DRAINAGE COURSE]{.underline}

[Drainage course consists of]{.underline} placement of 6 inch (152 mm)
thickness of granular base material over subgrade surface to support
concrete building slabs.

## 3.08 [MAINTENANCE]{.underline}

A. [Protection of Graded Areas]{.underline}: Protect newly graded areas
from traffic and erosion. Keep free of trash and debris. Repair and
re-establish grades in settled, eroded, and rutted areas to specified
tolerances.

B. [Reconditioning Compacted Areas]{.underline}: Where completed
compacted areas are disturbed by subsequent construction operations or
adverse weather, scarify surface, re-shape, and compact to required
density prior to further construction.

C. [Settling]{.underline}: Where settling is measurable or observable at
excavated areas during general project warranty period, remove surface
(pavement, lawn or other finish), add backfill material, compact, and
replace surface treatment. Restore appearance, quality, and condition of
surface or finish to match adjacent work, and eliminate evidence of
restoration to greatest extent possible.

## 3.09 [DISPOSAL OF EXCESS AND WASTE MATERIAL]{.underline}

[Transport excess excavated material]{.underline} to designated soil
storage areas on Kirtland Air Force Base. Waste areas will generally be
within 2 miles (3 km) of project site. Stockpile soil or spread as
directed by the SDR.

## 3.10 [RECORD DRAWINGS]{.underline}

[The Contractor shall supply]{.underline} one red-lined set of as-built
drawings which identify the actual location of utility lines installed
and the horizontal location and depth of all existing lines encountered
during construction. Utilities shall be dimensioned from the nearest
permanent structure.

END OF SECTION