Addendum One.pdf

COMMONWEALTH OF KENTUCKY

DEPARTMENT FOR FACILITIES AND SUPPORT SERVICES

DIVISION OF ENGINEERING AND CONTRACT ADMINISTRATION

INVITATION TO BID NO: RFB-36-27

FOR: Rest Area Remodel Clark County East Bound Kentucky Transportation Cabinet Clark County, Kentucky

DATE: August 12, 2026

RFB-785-2700000026

ADDENDUM NO. One (1)

BIDDER SHALL CONFORM TO THE FOLLOWING CHANGES AS SAME SHALL BECOME BINDING

UPON THE CONTRACT TO BE ISSUED IN RESPONSE TO THIS INVITATION TO BID.

Item 1: Refer to attached addendum for all additions, deletions, and/or changes to specifications and/or drawings.

END OF ADDENDUM

Invitation to Bid No. RFB-36-27 For: Rest Area Remodel Clark County East Bound Kentucky Transportation Cabinet Clark County, Kentucky

Susan Ward, Statewide Procurement Analyst II Division of Engineering and Contract Administration

Addendum 01

K Y T C – C l a r k C o . E a s t B o u n d R e s t A r e a R e m o d e l District 7 - Clark County, Kentucky Engineering File #: 625-CBY5-Z001-52 Request For Bid #: RFB-36-27

Addendum 01 Date : 12 Augus t 2026

THE BIDDING AND GENERAL DOCUMENTS, NOTES, AND DRAWINGS ARE CLARIFIED OR CHANGED IN

ACCORDANCE WITH THE FOLLOWING. THE BIDDERS SHALL ACKNOWLEDGE RECEIPT OF THIS

ADDENDUM ON THE PROPOSAL FORM IN THE SPACE PROVIDED.

GENERAL I TEMS:

A1.1 See attached Sign-in Sheets from Pre-Bid Meeting held on site 27 July 2026.

A1.2 See DECA Aids to Advertising, Technical Manual front-end:

See Description/Narrative:

Clarification, there are no roll up doors.

Clarification, the drum will not be capped.

A1.3 Existing Pay Phone in the Lobby:

Disconnect from service, remove from the wall, and salvage to owner.

A1.4 There is no Geo-Technical Report for this project.

A1.5 There are no known hazardous materials in this project.

A1.6 No KYTC specific pre-qualifications are necessary for this project.

A1.7 The Building Permits for both buildings have already been submitted for plan review with the Department of Housing, Buildings , and Construction - All fees have been paid. We have Conditional Approval pending a signed Affidavit by the apparent low bidder.

A1.8 General Contractor shall complete the Affidavit of Assurance mentioned above and provide it to WPa which will submit it to DHBC.

A1.9 General Contractor shall submit Pre-Engineered Wood Truss Shop Drawings for the new Vending Shed roof structure to DHBC – Drawings must be stamped and signed by a KY licensed Engineer.

A1.10 “Does this project have wage scale?” – Yes, see pages 30-40 in the Technical Manual (spec.

book).

A1.11 No preapprovals - Or--Equal-Clause - Products must be equal in every way to the specified Basis-of-Design – The burden of proof is on the contractor during the shop drawing submittals – If it does not meet the specification the contractor must provide either the basis-of design product or equal product at their expense.

ARCHITECTURAL I TEMS:

A R C H I T E C T U R A L D R A W I N G S :

A1.12 Refer to Drawing Sheet A101, Plan Notes:

Delete – Versaglaze ceramic faced blk and replace with Pre-faced glazed CMU – See specification section 042223 Architectural Concrete Unit Masonry.

A1.13 Refer to Drawing Sheet A101, Enlarged Women’s ADA Restroom, C/A101:

Add T-9 Baby changing station in same location as in the Men’s ADA Restroom (B/A101).

A1.14 Refer to Drawing Sheet A101, Ground Floor Plan, A/A101:

Add 10 lb. wall mounted ABC fire extinguisher on hook to Maintenance 104A – Exact location to be determined later.

A1.15 Refer to Drawing Sheet A102, Reflected Ceiling Plan:

Add access panels to service each unit heaters in ceiling of Men’s 102B & Women’s 103B – See attached Clarification Drawing A102.1.

A1.16 Refer to Drawing Sheet A201, New Work Floor Plan, B/A201:

Add 10 lb. wall mounted ABC fire extinguisher on hook to Storage Room 201 – Exact location to be determined later.

ARCHITECTURAL SPECIFICATIONS:

A1.17 Refer to SPECIFICATION SECTION 010000, Special Conditions:

Item 2, Project Description:

Clarification, there are no roll up doors.

Clarification, the drum will not be capped.

A1.18 Refer to SPECIFICATION SECTION 042213, Architectural Concrete Unit Masonry, 2.3 Concrete Masonry Units,A:

Add the following – 2. Acceptable manufacturer: Spectra-Glaze II, Pre-faced glazed Concrete block – Colors: Select from manufacturer’s full range of colors.

A1.19 Refer to SPECIFICATION SECTION 075216, SBS – Modified Bituminous Membrane Roofing:

Remove the following in its entirety – 1.9 Submittal of Equals & A.

Add in its place – 1.9 ROOFING CONRACTOR QUALIFICATIONS:

The Prime Roofing Contractor must self-perform the following (Low Slope, Metal Panels and SBS materials). Carpentry and Metal Flashing/Trim can be sub-contracted. Prime Contractor shall provide references that show their primary business is roofing. The Prime Contractor must have performed specified system within the last 5 consecutive years and have a minimum of 5 consecutive years specializing in the specified roofing systems of one or more of the approved manufacturers. The Prime Roofing Contractor shall provide proof that their company is a certified installer for the product being supplied and installed. The roof experience referenced must be of similar size, scope, and type as the proposed project. The certified installer must follow the product manufacturer’s published installation instructions. The Prime Roofing Contractor shall provide a resume for a qualified project superintendent that has a minimum of 5 years’ experience installing or supervising the specified system. The job superintendent must always be on job site when work is being performed. (Per General Conditions)

C IV IL I TEMS:

C I V I L D R A W I N G S :

A1.20 Refer to Drawing Sheet L1.1 – Enlarged Site Demolition Plan – Note referring to “SEE

ARCHITECTURAL PLANS FOR INFORMATION REGARDING SHED/BUILDING DEMOLITION” shall be modified to the following:

“SEE ARCHITECTURAL DRAWINGS FOR CONCESSION BUILDING RENOVATION. EXISTING

ADJACENT SHED STRUCTURE SHALL BE MOVED AND RELOCATED ON SITE. LOCATION TO BE

DETERMINED AT PRE-CONSTRUCTION MEETING. SHED MAY BE USED BY CONTRACTOR DURING

CONSTUCTION. SHED CAN ONLY BE DEMOLISHED OR REMOVED FROM SITE ONCE WE HAVE

PERMISSION FROM REAL PROPERTIES (PENDING).”

C I V I L S P E C I F I C A T I O N S A N D G E N E R A L I T E M S :

A1.21 Refer to Specification 312000 – Earth Moving / Section 3.4 – Excavation, General – A. Classified

Excavation - Shall be replaced with the following:

3.4 EXCAVATION, GENERAL

A. Unclassified Excavation: Excavate to subgrade elevations regardless of the character of surface and subsurface conditions encountered. Unclassified excavated materials may include rock, soil materials, and obstructions. No changes in the Contract Sum or the Contract Time will be authorized for rock excavation or removal of obstructions.

1. If excavated materials intended for fill and backfill include unsatisfactory soil materials and rock, replace with satisfactory soil materials.

2. Remove rock to lines and grades indicated to permit installation of permanent construction.

A1.22 Directional drilling is an approved method of boring for the Mountain Parkway crossing. Steel Casing Pipe is still required as outlined in the project drawings.

A1.23 Directional drilling is not an approved method for installation of the entire project.

A1.24 The heavily wooded area near the rest stop shall be cleared as shown on the drawings. This will allow for future access for possible repairs. Directional boring under the heavily wooded area is not approved.

A1.25 The open channel grinder, specification 462433, manufacturer shall provide VFD for phase conversion. Power is limited to single phase at the rest area site.

A1.26 Water Booster Pump Station, specification 221123, manufacturer shall provide control panel with a control voltage transformer for stepping down voltage to 120 volt single phase.

S TRUCTURAL I TEMS:

S T R U C T U R A L Q U E S T I O N F R O M C O N T R A C T O R S :

A1.27 Refer to SD-101, per note 6 there will be a SOG replacement at the Main Building. For which demo details are not provided. Please provide or clarify. Response – B/SD-101 shows area of slab on grade to be demolished (hatched). Note that Tag 6 shows slab to remain under the mural.

A1.28 Refer to SD-101, per Demo Legend the entire area for the Main building is to be removed. Does this denote the roof or SOG? Please provide specifics and details. Response – B/SD-101 shows area of slab on grade to be demolished (hatched). Note that Tag 6 shows slab to remain under the mural. Note other tag notes denote separation and cuts for other work, such as piers. See drawings.

A1.29 Refer to SD-101, per Demo Legend the entire area of the Storage building is to be removed.

Please provide specifics and details of what is to be demo. Response – A/SD-101 shows area of roof and wall to be demolished (hatched). Refer to specific tag notes. See drawings.

A1.30 The plans and specifications reference the Geotech Report for the risk of encountering unsuitable soils / rock / differences from expected at bid. Can we bid the project assuming best case scenario and tackle the potential issue of rock / unsuitable soils via unit price / change order? Response –Refer to new Specification 030300 (attached).

S T R U C T U R A L S P E C I F I C A T I O N S :

A1.31 Refer to Specification Section 0303000:

Clarify Structural Excavation and Backfill Specification is numbered 030300. Replace incorrect and corrupted specification section 030300 (in spec book) in it’s entirety with new Specification 0303000 (attached).

MEP I TEMS:

M E P S D R A W I N G S :

A1.32 Refer to Drawing Sheets U001, U002, U003, U004:

Remove John A Newman stamp from these sheets. These sheets were provided by KYTC as standard details for high mast lighting. Electrical items on these pages have been edited to match contract requirements. Structural has not been modified and is the responsibility of the Contractor to verify adequacy of structural design.

A1.33 Refer to Drawing Sheet U101:

Delete conduit run from existing CT cabinet to Panel R. It is not needed.

Delete existing light pole and circuit. Light pole is near entrance from interstate not shown on this sheet.

A1.34 Refer to Drawing Sheet U102:

Add note to Electrical Service Pole Detail as follows – “Electrical Service shall be 120/240 Volt, three phase, four wire from Utility.

Change service entrance conduit note from 3#6 to 4#6.

A1.35 Refer to Drawing Sheet P201:

Reference Potable Water Riser - add expansion tank to water heater.

A1.36 Refer to Drawing Sheet ED101:

Remove post containing a receptacle at the plan Northwest corner of the storage building and circuit to it. All existing electrical for storage building shall be removed.

Remove all electrical from the Main Building whether indicated or not.

A1.37 Refer to Drawing Sheet E101:

Reference Surface Mount Lighting Detail – Delete note “SO Cord” and replace with “cord supplied by light fixture manufacturer”

A1.38 Refer to Drawing Sheet E201:

In Vestibule 101 delete two receptacles on corners of wall served by circuit R-25. Add receptacle in front of wall where receptacle was removed in demo with GFI receptacle and use circuit R-25 to it.

E N D O F A D D E N D U M 0 1

8' - 0"

GYPBD

8' - 0"

GYPBD

7' - 0"

GYPBD

HH

Scale

Account #:

Date Drawn by Checked by 1/4" = 1'-0"

8/11/2026 4:52:05 PM

A102.1

PARTIAL CEILING PLAN

625-CBY5-Z001-52

KYTC - CLARK CO.

E.B. REST AREA

REMODEL 08/11/26

KDP

KDP

013 18" X 18" CLG ACCESS PANEL FOR ELEC

HEATER - SEE ELEC

KYTC – Clark Co. E.B. Rest Area Remodel 625-CBY5-Z001-52

STRUCTURAL EXCAVATION AND BACKFILL 030300-1

SECTION 030300 – STRUCTURAL EXCAVATION AND BACKFILL

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Structural Excavation and Backfill includes:

1. Preparing subgrades for slabs on grade.

2. Excavating and backfilling for building foundations from subgrade.

3. Over-excavation and structural backfill to achieve adequate support for slabs and foundations.

4. Subsurface drainage backfill for foundation walls.

5. Backfill for excavations within influence zones of footings.

B. Related Sections: The following Sections contain requirements that relate to this Section:

1. Division 1 Section “Structural Special Inspection.”

2. Division 1 Section "Temporary Facilities and Controls."

3. Division 3 Section "Cast-in-Place Concrete."

1.3 PAYMENT

A. General:

1. Overexcavation and engineered backfill called for on the foundation plan is part of the lump sum base bid and will not be reduced without credit to Owner.

2. No additional compensation will be made for excavation and engineered backfill where work was not based on the inspection and recommendation of the Special Inspector. All quantities for unit price or other contract adjustment must be recorded by the Contractor and verified by the Special Inspector daily.

3. Any additional depth (below specified bottom of foundation) to achieve adequate support for bearing foundations will be determined by the Special Inspector (not Contractor) during the construction operations and will be paid by the Owner upon approval as a change in the work.

4. No payment will be made for rejected work.

5. All overexcavation of soft and/or saturated soils caused by dewatering/rainwater control practices and wet/freezing weather, excavation of soils into mass undercut or mass fill performed as part of this Construction Project, and subsequent backfill, as directed by Special Inspector shall be performed at no additional cost to Owner. Contractor shall notify General Contractor of work required, perform work where directed by General Contractor, and coordinate with other trades who may be required to perform such work.

6. Any adjustments for payment to the base bid for excavation (Standard vs Special) shall be process and material dependent, not elevation dependent.

1.4 DEFINITIONS

A. Backfill: Soil material or controlled low-strength material (flowable fill) used to fill an excavation.

STRUCTURAL EXCAVATION AND BACKFILL 030300-2

B. Borrow Soil: Satisfactory soil imported from off-site for use as fill or backfill.

C. Drainage Course: Free-draining aggregate layer supporting the slab-on-grade that also minimizes upward capillary flow of pore water.

D. Excavation: Removal of material encountered above bearing elevations and to lines and dimensions indicated.

1. Bulk (Mass) Excavation: Excavation more than 10 feet in width and more than 30 feet in length.

2. Over-excavation: Excavation below bearing elevations or beyond indicated lines and dimensions as directed by Special Inspector and confirmed by Architect.

3. Unauthorized Excavation: Excavation below bearing elevations or beyond indicated lines and dimensions without direction by Architect. Unauthorized excavation, as well as remedial work directed by Architect, shall be without additional compensation.

E. Fill: Soil materials used to raise existing grades.

F. Rock: Rock material in beds, ledges, unstratified masses, conglomerate deposits, and boulders of rock material that cannot be removed by Standard Excavation.

G. Structures: Buildings, footings, foundations, retaining walls, slabs, or other man-made stationary features constructed above or below the ground surface as shown on the structural drawings.

H. Subgrade: Uppermost surface of an excavation or the top surface of a fill or backfill immediately below subbase, drainage fill, drainage course, or topsoil materials.

I. Utilities: On-site underground pipes, conduits, ducts, and cables, as well as underground services within buildings.

1.5 SUBMITTALS

A. General: Furnish submittals in quantity, format, and other Conditions of the Contract and as specified in Division 1 of the Project Manual.

B. Material Test Reports: For each on-site and borrow soil material proposed for fill and backfill as follows:

1. Classification according to ASTM D 2487.

2. Laboratory compaction curve according to ASTM D 698.

PART 2 - PRODUCTS

2.1 SOIL MATERIALS

A. General: Provide borrow soil materials when sufficient satisfactory soil materials are not available from excavations.

B. Satisfactory Soils: Soil Classification Groups GW, GP, GM, GC, SW, SP, SM, SC, CH, and CL according to ASTM D 2487, or a combination of these groups; free of rock or gravel larger than 3 inches in any dimension, debris, waste, frozen materials, vegetation, and other deleterious matter. No concentration of large fragments is permitted unless approved by Geotechnical Engineer and Architect.

STRUCTURAL EXCAVATION AND BACKFILL 030300-3

1. Plasticity Index: Less than 30.

2. Liquid Limit: Less than 50.

3. Swell potential: Less than 50 psf.

4. Maximum dry density of at least 100 pounds per cubic foot.

C. Unsatisfactory Soils: Soil Classification Groups ML, OL, MH, OH, and PT according to ASTM D 2487, or a combination of these groups.

1. Unsatisfactory soils also include satisfactory soils not maintained within 2 percent of optimum moisture content at time of compaction.

2. Shot rock, asphalt, and coal fragments.

3. Organics content shall be less than 5%. Limit total depth of soil fills with organic contents over 4% to 24”.

4. Soils containing 40% and greater silt content will not be accepted for use in any capacity and shall be wasted off site.

D. Drainage Course and Drainage/Wall Backfill (Crushed Stone): Narrowly graded mixture of crushed stone, or crushed or uncrushed gravel; meeting Kentucky Transportation Cabinet Standard Specification for #57 stone; ASTM D 448; coarse-aggregate grading Size 57; with 100 percent passing a 1-1/2-inch sieve and 0 to 5 percent passing a No. 8 sieve.

2.2 CONTROLLED LOW-STRENGTH MATERIAL

A. Controlled Low-Strength Material Performance Additive:

1. Available Products: Subject to compliance with requirements, products that may be in-corporated in the Work include, but are not limited to, the following:

a. Darafill or Darafill Dry, W.R. Grace & Co.

b. Rheomac VMA 362, BASF Corporation – Admixture Systems

B. Prohibited Admixture: Calcium chloride thiocyanates or admixture containing more than 0.05 percent chloride ions.

C. Controlled Low Strength Material CLSM (Flowable fill): Self-compacting, flowable concrete material. Provide blend of cement, flyash, and sand with minimum cementitious content as follows:

1. Excavatable flowable fill: 100 lb cement and 250 lb fly ash per cubic yard.

2. Structural flowable fill (250 psi): 175 lb cement and 200 lb fly ash per cubic yard. Add

CLSM performance additive at manufacturer’s recommended dosage rate, adjusting water content to provide desired flow and strength characteristics.

PART 3 - EXECUTION

3.1 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth moving operations.

B. Protect and maintain erosion and sedimentation controls during earth moving operations.

C. Protect subgrades and foundation soils from freezing temperatures and frost. Remove temporary protection before placing subsequent materials.

STRUCTURAL EXCAVATION AND BACKFILL 030300-4

3.2 DEWATERING

A. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

B. Protect subgrades from softening, undermining, washout, and damage by rain or water accumulation.

1. Reroute surface water runoff away from excavated areas. Do not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches.

C. All undercut and engineered backfill remedial work recommended by the Special Inspector and caused by inadequate dewatering and drainage practices during construction shall be provided at no additional cost to Owner.

3.3 EXCAVATION, GENERAL

A. If excavated materials intended for fill and backfill include unsatisfactory soil materials and rock, replace with satisfactory soil materials.

B. Excavate pavements and obstructions visible on surface; underground structures, utilities, and other items indicated to be removed; together with soil, boulders, and other materials not classified as rock or unauthorized excavation.

3.4 STRUCTURAL EXCAVATION

A. Excavate to indicated elevations and dimensions within a tolerance of plus or minus 1 inch. If applicable, extend excavations a sufficient distance from structures for placing and removing concrete formwork, for installing services and other construction, and for inspections.

1. Excavations for footings and foundations: Do not disturb bottom of excavation. Excavate soils by hand to final grade just before placing concrete reinforcement. Trim bottoms to required lines and grades to leave solid base to receive other work.

2. Recompact areas loosened by excavation operations prior to reinforcing steel placement.

3. Remove loose soil, debris, and excess surface water from the bearing surface prior to concrete placement.

B. Over-excavate all soft and deleterious material below foundations as directed by Special Inspector and backfill back to foundation bearing elevation with approved fill material.

3.5 SUBGRADE INSPECTION

A. Notify Architect when excavations have reached required subgrade.

B. If Special Inspector determines that unsatisfactory soil is present, notify Architect and receive direction. Once received, continue excavation and replace with compacted backfill or fill material as directed.

1. Excavate soft spots, unsatisfactory soils, and areas of excessive pumping or rutting, as determined by Architect, and replace with compacted backfill or fill as directed.

C. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or construction activities, as directed by Architect, without additional compensation.

STRUCTURAL EXCAVATION AND BACKFILL 030300-5

3.6 UNAUTHORIZED EXCAVATION

A. Fill unauthorized excavation under foundations or wall footings by extending bottom elevation of concrete foundation or footing to excavation bottom, without altering top elevation. Lean concrete fill, with 28-day compressive strength of 1500 psi, may be used when approved by Architect.

1. Fill unauthorized excavations under other construction, pipe, or conduit as directed by Architect.

3.7 STORAGE OF SOIL MATERIALS

A. Stockpile borrow soil materials and excavated satisfactory soil materials without intermixing.

Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust.

1. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees.

3.8 BACKFILL, GENERAL

A. Place and compact backfill in excavations promptly, but not before completing the following:

1. Construction below finish grade including, where applicable, subdrainage, dampproofing, waterproofing, and perimeter insulation.

2. Surveying locations of underground utilities for Record Documents.

3. Testing and inspecting underground utilities.

4. Removing concrete formwork.

5. Removing trash and debris.

B. Place backfill on subgrades free of mud, frost, snow, or ice.

C. Do not backfill below footings with crushed stone where building foundations classified as soil bearing on the structural drawings.

3.9 SOIL FILL

A. Plow, scarify, bench, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so fill material will bond with existing material.

B. Place and compact engineered fill material in layers to required elevation.

C. Place fill on subgrades free of mud, frost, snow, or ice.

3.10 SOIL MOISTURE CONTROL

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill soil layer before compaction to within 2 percent of optimum moisture content.

1. Do not place backfill or fill soil material on surfaces that are muddy, frozen, or contain frost or ice.

2. Remove and replace, or scarify and air dry, otherwise satisfactory soil material that exceeds optimum moisture content by 2 percent and is too wet to compact to specified dry unit weight. Maintain the moisture content as such.

STRUCTURAL EXCAVATION AND BACKFILL 030300-6

3.11 COMPACTION OF SOIL/GRAVEL BACKFILLS AND FILLS

A. Place backfill and fill soil materials in layers not more than 8 inches in loose depth for material compacted by heavy compaction equipment, and not more than 4 inches in loose depth for material compacted by hand-operated tampers.

B. Place backfill gravel (KYTC #57 stone) in layers not more than 8 inches in loose depth and tamp in place. Use hand-operated tampers (plate compactors) where grade differential, at time of tamping, is more than 12-inches on each side of wall or where backfill area extent or accessibility does not facilitate the use of heavy compaction equipment.

C. Place backfill gravel and fill soil materials evenly on all sides of structures to required elevations, and uniformly along the full length of each structure.

D. Compact soil materials to not less than the following percentages of maximum dry unit weight according to ASTM D 698:

1. Scarify and recompact top 12 inches of existing subgrade and each layer of backfill or fill soil material at 98 percent.

2. When the fill depth will exceed 10 feet, the excess lower portion shall be compacted to at least 100 percent.

3.12 CEMENTITIOUS FILL

A. Place fill on subgrades free of mud, frost, snow, or ice.

B. Place and consolidate in accordance to the recommendations of the Geotechnical Report.

3.13 GRADING

A. General: Uniformly grade areas to a smooth surface, free of irregular surface changes. Comply with compaction requirements and grade to cross sections, lines, and elevations indicated.

1. Provide a smooth transition between adjacent existing grades and new grades.

2. Cut out soft spots, fill low spots, and trim high spots to comply with required surface tolerances.

B. Grading inside Building Lines: Finish subgrade to a tolerance of 1/2 inch when tested with a 10-foot straightedge.

3.14 SUBBASE UNDER CONCRETE SLABS-ON-GRADE

A. Place subbase on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place and compact subbase under cast-in-place concrete slabs-on-grade as follows:

1. Place subbase 6 inches or less in compacted thickness in a single layer.

2. Place subbase that exceeds 6 inches in compacted thickness in layers of equal thickness, with no compacted layer more than 6 inches thick or less than 3 inches thick.

3. Compact each layer of subbase to required cross sections and thicknesses to not less than

98 percent of maximum dry unit weight according to ASTM D 698.

STRUCTURAL EXCAVATION AND BACKFILL 030300-7

3.15 FIELD QUALITY CONTROL

A. General: The Owner will employ a testing agency that meets the requirements of ASTM E329 to perform tests and to submit test reports. Failure to detect any defective materials shall not prevent later rejection when such defect is discovered or obligate the Architect or Owner for final acceptance.

1. See Section 014110 – Structural Special Inspections and Contract Drawings for testing and inspection to be performed.

2. Test results will be reported in writing to the Architect, Engineer, and General Contractor within 24 hours after tests.

B. Allow testing agency to inspect and test subgrades and each fill or backfill layer. Proceed with subsequent backfill or foundation placement only after test results for previously completed work comply with requirements.

C. When testing agency reports that subgrades, fills, or backfills have not achieved degree of compaction specified, scarify and moisten or aerate, or remove and replace soil materials to depth required; recompact and retest until specified compaction is obtained.

3.16 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Transport surplus satisfactory soil to designated storage areas on Owner's property. Stockpile or spread soil as directed by Architect.

1. Temporary stockpiles shall not be located under the dripline of trees. Stockpiles shall be sorted, acceptable from unsatisfactory materials as defined above, for reuse.

Unsatisfactory fill materials shall be evenly and neatly spread within the waste area dictated on the contract documents. The stockpile site shall be neatly regraded, seeded, and covered with straw at project end.

2. Remove waste materials, including unsatisfactory soil, trash, and debris, and legally dispose of them off Owner's property.

END OF SECTION 030300