Sampling & Testing Guide-Minimum Frequency

STRUCTURAL CONCRETE, REINFORCEMENT, FOUNDATIONS & SUBSTRUCTURES,

CONCRETE STRUCTURES, CONCRETE FLOORS, & CONCRETE BOX, ARCH & CIRCULAR CULVERTS

April 16, 2024

Sections 2403, 2404, 2405, 2406, 2412, & 2415

Matls. IM 204

Supersedes April 21, 2020

PCC Non-structural & Miscellaneous see IM 535 Appendix C

Appendix H (US) Units

MATERIAL OR CONSTRUCTION ITEM
TESTS

METHOD OF ACCEPTANCE & RELATED IMs
QUALITY CONTROL
INDEPENDENT ASSURANCE & VERIFICATION S&T
REMARKS

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 

S&T

TYPE

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 
SOURCE INSPECTION

Aggregate-Fine (4110)

 

AS               209

 

 

 

 

 

 

 

 

 

 

 

 

 

Aggregate-Coarse (4115)

 

 

AS               209

 

 

 

 

 

 

 

 

 

 

 

 

Granular

Backfill (4133)

 

AS               209

 

 

 

 

 

 

 

 

 

 

 

 

Portland

Cement (4101)

Quality

AS               401

 

 

 

 

 

 

 

 

 

 

 

 

Fly Ash (4108)

Quality

 

AS          491.17

 

 

 

 

 

 

 

 

 

 

 

 

Mixing Water (4102)

Quality

 

 

 

 

 

 

 

V

RCE

1/source

1pt

CMB

 

Not required for potable water from Municipal Supply (2)

GGBFS (Ground Granulated Blast Furnace Slag)

Quality

AS          491.14

 

 

 

 

 

 

 

 

 

 

 

 

Air Entraining Admixture

Quality

AB               403

 

 

 

 

 

 

 

 

 

 

 

 

Retarding Admixture

Quality

AB               403

 

 

 

 

 

 

 

 

 

 

 

 

Water reducing Admixture

Quality

AB               403

 

 

 

 

 

 

 

 

 

 

 

 

Curing Compound, White (4105)

Lab Tested

AS               405

 

 

 

 

 

V

DME

1/batch

1qt

CMB

 

Sample batches not previously reported or as required by DME

Curing Compound,

Clear (4105)

 

AB          405.07

 

 

 

 

 

 

 

 

 

 

 

 

AS-Approved Source

Cert – Certification Statement

RCE-Resident Construction Engineer/Project Engineer

IA-Independent Assurance

ASD-Approved Shop Drawing

 

DME-District Materials Engineer

V-Verification

S&T-Sampling & Testing

 

CMB-Construction Materials Bureau

M-Monitor

AB-Approved Brand

 

CONTR-Contractor

 

(2) DME may waive sampling of water from an established well that has shown past compliance.

NOTE:  RCE/CONTR indicates that the Contractor shall assist in the sampling at the direction of and witnessed by the Project Engineer.

NOTE: For Local agency projects with no Federal funding, Independent Assurance, IA, tests are not required.

NOTE: For Local agency projects with no Federal funding, verification samples or monitor samples sampled by the DME are not required. These samples may be sampled by the contracting authority. With prior approval, these samples may be tested by the Iowa Department of Transportation Central Laboratory.

 

 

Sampling & Testing Guide-Minimum Frequency

STRUCTURAL CONCRETE, REINFORCEMENT, FOUNDATIONS & SUBSTRUCTURES,

CONCRETE STRUCTURES, CONCRETE FLOORS, & CONCRETE BOX, ARCH & CIRCULAR CULVERTS

April 16, 2024

Sections 2403, 2404, 2405, 2406, 2412, & 2415

Matls. IM 204

Supersedes April 21, 2020

PCC Non-structural & Miscellaneous see IM 535 Appendix C

Appendix H (US) Units

MATERIAL OR CONSTRUCTION ITEM
TESTS

METHOD OF ACCEPTANCE & RELATED IMs

 

QUALITY CONTROL

 

INDEPENDENT ASSURANCE
& VERIFICATION S&T

 

REMARKS

 

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST BY

 

REPORT

 

S&T

TYPE

 

SAMPLE

BY

 

FREQ.

 

SAMPLE SIZE

 

TEST

BY

 

REPORT

 
SOURCE INSPECTION

Pre-formed Joint Sealer (4136)

Lab-Tested

AB              436.02

                  436.05

 

 

 

 

 

 

 

 

 

 

 

 

Reinforcing Steel Bars (4151)

Quality

 

AS                   451

                451.03B

 

 

 

 

 

 

 

 

 

 

 

 

Steel Pile (4167)

Quality

                       467

 

 

 

 

 

 

 

 

 

 

 

 

Concrete Pile (4166)

Quality

AS                   570

 

 

 

 

 

 

 

 

 

 

 

 

Timber Pile (4165)

Quality

 

Cert                 462

AS

 

 

 

 

 

 

 

 

 

 

 

 

Timber (4162) & Lumber (4163

               

Treated-Cert      462

AS

 

 

 

 

 

 

 

 

 

 

 

 

Concrete Anchors

Quality

AB              453.09

 

 

 

 

 

 

 

 

 

 

 

 

Epoxy Grout

Quality

AB              491.11

 

 

 

 

 

 

 

 

 

 

 

 

Concrete Sealer

Quality

AB              491.12

 

 

 

 

 

 

 

 

 

 

 

 

Subdrain Pipe (4143)

Quality

AS            443, 448

 

 

 

 

 

 

 

 

 

 

 

 

Neoprene Bearing Pads (4195)

 

AS              495.03

 

 

 

 

 

 

 

 

 

 

 

 

Bronze Bearing Plates (4190.03)

 

AS Cert

 

 

 

 

 

 

 

 

 

 

 

 

AS-Approved Source

Cert – Certification Statement

RCE-Resident Construction Engineer/Project Engineer

IA-Independent Assurance

ASD-Approved Shop Drawing

 

DME-District Materials Engineer

V-Verification

S&T-Sampling & Testing

 

CMB-Construction Materials Bureau

M-Monitor

AB-Approved Brand

 

CONTR-Contractor

 

NOTE:  RCE/CONTR indicates that the Contractor shall assist in the sampling at the direction of and witnessed by the Project Engineer.

 

 

Sampling & Testing Guide-Minimum Frequency

STRUCTURAL CONCRETE, REINFORCEMENT, FOUNDATIONS & SUBSTRUCTURES,

CONCRETE STRUCTURES, CONCRETE FLOORS, & CONCRETE BOX, ARCH & CIRCULAR CULVERTS

April 16, 2024

Sections 2403, 2404, 2405, 2406, 2412, & 2415

Matls. IM 204

Supersedes April 21, 2020

PCC Non-structural & Miscellaneous see IM 535 Appendix C

Appendix H (US) Units

MATERIAL OR CONSTRUCTION ITEM
TESTS

METHOD OF ACCEPTANCE & RELATED IMs

 

QUALITY CONTROL

 

INDEPENDENT ASSURANCE
& VERIFICATION S&T

 

REMARKS

 

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 

S&T

TYPE

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

 SIZE

 

TEST

BY

 

REPORT

 
SOURCE INSPECTION

Steel Masonry Plate (4152)

 

AS Cert

 

 

 

 

 

 

 

 

 

 

 

 

Prestress Units,  Precast Units (2407)

Quality

AS

Cert

Inspection Report 570

 

 

 

 

 

 

 

 

 

 

 

 

Precast Units (2419)               

Quality

AS

Cert               445

 

 

 

 

 

 

 

 

 

 

 

 

Anchor Bolts (lighting, signing, handrail, structures) (4153)

Lab Tested

ASD

 

 

 

 

 

 

 

 

 

 

 

 

Structural Steel (4152)

Quality

Cert

 

 

 

 

 

 

 

 

 

 

 

Monitor Sample According to plans or other instructions

Aluminum  & Steel Bridge Rail & Anchor Assembly

 

ASD                   

 

 

 

 

 

 

 

 

 

 

 

 

Conduit (Electrical)

(4185.10)) Steel

 

AS

 

 

 

 

 

 

 

 

 

 

 

 

Conduit (Plastic)

(4185.10)

Lab Tested

 

 

 

 

 

 

V

DME

1/size

4’

CMB

 

 

Bentonite

 

Visual

 

 

 

 

 

 

 

 

 

 

 

 

Flowable Mortar

Lab Tested

 

Approved 525, 375

Trial Mix

 

 

 

 

 

 

 

 

 

 

 

Tested by DME

Fabric Formed Revetment

 

Approved        375

Trial Mix

 

 

 

 

 

 

 

 

 

 

 

Tested by DME

AS-Approved Source

Cert – Certification Statement

RCE-Resident Construction Engineer/Project Engineer

IA-Independent Assurance

ASD-Approved Shop Drawing

 

DME-District Materials Engineer

V-Verification

S&T-Sampling & Testing

 

CMB-Construction Materials Bureau

M-Monitor

 

 

CONTR-Contractor

 

NOTE:  RCE/CONTR indicates that the Contractor shall assist in the sampling at the direction of and witnessed by the Project Engineer.

NOTE: For Local agency projects with no Federal funding, Independent Assurance, IA, tests are not required.

NOTE: For Local agency projects with no Federal funding, verification samples or monitor samples sampled by the DME are not required. These samples may be sampled by the contracting authority. With prior approval, these samples may be tested by the Iowa Department of Transportation Central Laboratory.

 

 

Sampling & Testing Guide-Minimum Frequency

STRUCTURAL CONCRETE, REINFORCEMENT, FOUNDATIONS & SUBSTRUCTURES,

CONCRETE STRUCTURES, CONCRETE FLOORS, & CONCRETE BOX, ARCH & CIRCULAR CULVERTS

April 16, 2024

Sections 2403, 2404, 2405, 2406, 2412, & 2415

Matls. IM 204

Supersedes April 21, 2020

PCC Non-structural & Miscellaneous see IM 535 Appendix C

Appendix H (US) Units

MATERIAL OR CONSTRUCTION ITEM
TESTS

METHOD OF ACCEPTANCE & RELATED IMs

 

QUALITY CONTROL

 

INDEPENDENT ASSURANCE
& VERIFICATION S&T

 

REMARKS

 

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 

S&T

TYPE

 

SAMPLE

BY

 

FREQ.

 

SAMPLE SIZE

 

TEST

BY

 

REPORT

 
PLANT INSPECTION

Aggregate- Fine (4110)

Gradation

Deck

              302, 306

                     336

CONTR

IM 528

IM 301

CONTR

800240

 

V

 

IA

RCE/

CONTR

Sample & Test

1/deck pour

IM 301

RCE

 

DME

Plant Monitor Workbook

See IM 528

 

Gradation

All other

 

CONTR

IM 528

IM 301

CONTR

V

 

 

IA

RCE/

CONTR

 

1/project

Sample 1/wk Test 1st day +20%

IM 301

RCE

 

 

DME

Plant Monitor Workbook

See IM 528

 

 

Systems approach applicable

 

Moisture

              308, 528

CONTR

IM 528

IM 301

CONTR

 

 

 

 

 

 

See IM 528 if Moisture Probe is used

 

Sp. Gr.

                     307

CONTR

IM 528

IM 301

CONTR

 

 

 

 

 

 

 

 

Quality

AS                 209

 

 

 

 

 

 

 

 

 

 

 

Aggregate- Coarse (4115)

Gradation

Deck

              302, 306

                     336

CONTR

IM 528

IM 301

CONTR

V

 

IA

RCE/

CONTR

Sample & Test

1/deck pour

IM 301

RCE

 

DME

Plant Monitor Workbook

See IM 528

 

Gradation

All other

 

CONTR

IM 528

IM 301

CONTR

V

 

 

IA

RCE/

CONTR

 

1/project

Sample 1/wk

Test 1st day +20%

IM 301

RCE

 

 

DME

Plant Monitor Workbook

See IM 528

 

 

Systems approach applicable

 

Moisture

              308, 528

CONTR

IM 528

2000gm

CONTR

 

 

 

 

 

 

 

 

Sp. Gr.

                     307

CONTR

IM 528

2000gm

CONTR

 

 

 

 

 

 

 

 

Quality

AS                 209

 

 

 

 

V

DME

1/1000  cy

50 lb

CMB

 

(1)

Portland

Cement

w/c ratio

                     528

CONTR

1/pour

 

CONTR

 

 

 

 

 

 

 

Quality

AS                Cert

 

 

 

 

V

DME

1/1000 cy

15 lb

CMB

 

(1)

AS-Approved Source

Cert – Certification Statement

RCE-Resident Construction Engineer/Project Engineer

IA-Independent Assurance

ASD-Approved Shop Drawing

 

DME-District Materials Engineer

V-Verification

S&T-Sampling & Testing

 

CMB-Construction Materials Bureau

M-Monitor

 

 

CONTR-Contractor

 

(1) These verification samples for concrete materials not required when mix quantity is less than 50 cu. yd. For placements greater than 1000 cu. yd., sample 1/placement.

NOTE:  IA  may be accomplished by system approach or on a per project basis (IA at 1 per 1000 cy of concrete) at the discretion of the DME according to IM 207.

NOTE:  RCE/CONTR indicates that the Contractor shall assist in the sampling at the direction of and witnessed by the Project Engineer.

NOTE: For Local agency projects with no Federal funding, Independent Assurance, IA, tests are not required.

NOTE: For Local agency projects with no Federal funding, verification samples or monitor samples sampled by the DME are not required. These samples may be sampled by the contracting authority. With prior approval, these samples may be tested by the Iowa Department of Transportation Central Laboratory.

 

 

Sampling & Testing Guide-Minimum Frequency

STRUCTURAL CONCRETE, REINFORCEMENT, FOUNDATIONS & SUBSTRUCTURES,

CONCRETE STRUCTURES, CONCRETE FLOORS, & CONCRETE BOX, ARCH & CIRCULAR CULVERTS

April 16, 2024

Sections 2403, 2404, 2405, 2406, 2412, & 2415

Matls. IM 204

Supersedes April 21, 2020

PCC Non-structural & Miscellaneous see IM 535 Appendix C

Appendix H (US) Units

MATERIAL OR CONSTRUCTION ITEM
TESTS

METHOD OF ACCEPTANCE & RELATED IMs

 

QUALITY CONTROL

 

INDEPENDENT ASSURANCE
& VERIFICATION S&T

 

REMARKS

 

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 

S&T

TYPE

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 
PLANT INSPECTION

Fly Ash

Quality

AS                  Cert

 

Each Load

 

 

800240

 

 

 

 

 

 

 

GGBFS(Ground Granulated Blast Furnace Slag)

Quality

AS                  Cert

 

Each Load

 

 

 

 

 

 

 

 

 

Air-Entraining Admixture (4103)

 

AB                   403

 

 

 

 

 

M

DME

1/project

1pt

CMB

 

(1)

Sample lots/batches not previously reported or as required by DME

Retarding Admixture

 

AB                   403

 

 

 

 

 

M

DME

1/project

1pt

CMB

 

Water Reducing Admixture (4103)

 

AB                   403

 

 

 

 

 

M

DME

1/project

1pt

CMB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRADE INSPECTION

Plastic Concrete

Air Content

                318, 327

 

 

 

 

E145*

V

 

IA

RCE

1/30 cy,

min. 1/day

 

RCE

 

DME

 

If >350 cy placement, DME may increase to 1/50 cy, if consistent  during first 90 cy

 

Slump

                317, 327

 

 

 

 

V

 

IA

RCE

1/30 cy,

min. 1/day

 

RCE

 

DME

 

DME may adjust  

 

Beams

         316, 327, 328

 

 

 

 

 

RCE

2/placement

 

RCE

 

If required per 2403

 

Cylinders

 

 

 

 

 

 

 

DME

 

 

 

DME

 

See Note

AS-Approved Source

Cert – Certification Statement

RCE-Resident Construction Engineer/Project Engineer

IA-Independent Assurance

ASD-Approved Shop Drawing

 

DME-District Materials Engineer

V-Verification

S&T-Sampling & Testing

 

CMB-Construction Materials Bureau

M-Monitor

AB-Approved Brand

 

CONTR-Contractor

 

(1)    These verification samples for concrete materials not required when mix quantity is less than 50 cu. yd. For placements greater than 1000 cu. yd., sample 1/placement.

(2)    NOTE:  IA  may be accomplished by system approach or on a per project basis (IA at 1 per 1000 cy of concrete) at the discretion of the DME according to IM 207.

NOTE:  RCE/CONTR indicates that the Contractor shall assist in the sampling at the direction of and witnessed by the Project Engineer.

NOTE:  Cylinders for strength on primary project bridge decks only and where specifically called for in the plans or specifications.

NOTE: For Local agency projects with no Federal funding, Independent Assurance, IA, tests are not required.

NOTE: For Local agency projects with no Federal funding, verification samples or monitor samples sampled by the DME are not required. These samples may be sampled by the contracting authority. With prior approval, these samples may be tested by the Iowa Department of Transportation Central Laboratory.

*Available from the Construction and Materials Bureau.

 

Sampling & Testing Guide-Minimum Frequency

STRUCTURAL CONCRETE, REINFORCEMENT, FOUNDATIONS & SUBSTRUCTURES,

CONCRETE STRUCTURES, CONCRETE FLOORS, & CONCRETE BOX, ARCH & CIRCULAR CULVERTS

April 16, 2024

Sections 2403, 2404, 2405, 2406, 2412, & 2415

Matls. IM 204

Supersedes April 21, 2020

PCC Non-structural & Miscellaneous see IM 535 Appendix C

Appendix H (US) Units

MATERIAL OR CONSTRUCTION ITEM
TESTS

METHOD OF ACCEPTANCE & RELATED IMs

 

QUALITY CONTROL

 

INDEPENDENT ASSURANCE
& VERIFICATION S&T

 

REMARKS

 

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TES

BY

 

REPORT

 

S&T

TYPE

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 
GRADE INSPECTION

Reinforcing Steel (4151)

Quality

AS                Cert

 

Each Shipment

 

 

Field Book

V

DME

IM 451

6 ft

CMB

 

 

Reinforcing Steel Epoxy Coated (4151)

Quality

AS                Cert

 

Each Shipment

 

 

Field Book

V

DME

1 bar

6 ft

CMB

 

Will be verification  tested for coating

Reinforcing Stainless Steel (4151)

Quality

AS                Cert

 

Each Shipment

 

 

Field Book

V

DME

IM 452

6 ft

CMB

 

 

Steel Pile (4167)

Quality

AS                Cert

 

Each Heat

 

 

Field Book

 

DME

IM 467

 

CMB

 

 

Timber Pile (4165)

Quality

AS                 462

                    Cert

 

 

 

 

 

V

DME

IM 467

 

CMB

 

No grade requirement

Charge numbers on butt end.

Anchor Bolts (lighting, signing, handrail, structures)

Lab Tested

ASD

 

 

 

 

 

V

DME

1/diameter/ source/year

1 bolt w/nut & washer

CMB

 

Sample only if not source inspected

Steel Masonry Plates (4152)

 

ASD              Cert

 

Each Shipment

 

 

Field Book

 

 

 

 

 

 

Approved by Materials Department

Bronze Bearing Plates (4190.03)

Lab Tested

 

 

 

 

 

 

V

DME

1/project

1 only

CMB

 

Sample only if not source inspected

Neoprene Bearing Pads (4195)

 

AS            495.03

 

Each Shipment

 

 

820905

 

 

 

 

 

 

 

Alum. Bridge Rail & Anchor Assembly

 

ASD

 

Each Shipment

 

 

Field Book

 

 

 

 

 

 

Approved By Materials Dept.

Drains (Std Steel Pipe)(as per plan)

Dimensions

Galvanized

ASD           Visual

                     332

 

 

 

 

 

V

DME

1/project

 

DME

 

 

AS-Approved Source

Cert – Certification Statement

RCE-Resident Construction Engineer/Project Engineer

IA-Independent Assurance

ASD-Approved Shop Drawing

 

DME-District Materials Engineer

V-Verification

S&T-Sampling & Testing

 

CMB-Construction Materials Bureau

M-Monitor

AB-Approved Brand

 

CONTR-Contractor

 

NOTE:  RCE/CONTR indicates that the Contractor shall assist in the sampling at the direction of and witnessed by the Project Engineer.

NOTE: For Local agency projects with no Federal funding, Independent Assurance, IA, tests are not required.

NOTE: For Local agency projects with no Federal funding, verification samples or monitor samples sampled by the DME are not required. These samples may be sampled by the contracting authority. With prior approval, these samples may be tested by the Iowa Department of Transportation Central Laboratory.

 

 

Sampling & Testing Guide-Minimum Frequency

STRUCTURAL CONCRETE, REINFORCEMENT, FOUNDATIONS & SUBSTRUCTURES,

CONCRETE STRUCTURES, CONCRETE FLOORS, & CONCRETE BOX, ARCH & CIRCULAR CULVERTS

April 16, 2024

Sections 2403, 2404, 2405, 2406, 2412, & 2415

Matls. IM 204

Supersedes April 21, 2020

PCC Non-structural & Miscellaneous see IM 535 Appendix C

Appendix H (US) Units

MATERIAL OR CONSTRUCTION ITEM
TESTS

METHOD OF ACCEPTANCE & RELATED IMs

 

QUALITY CONTROL

 

INDEPENDENT ASSURANCE
& VERIFICATION S&T

 

REMARKS

 

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 

S&T

TYPE

 

SAMPLE

BY

 

FREQ.

 

SAMPLE

SIZE

 

TEST

BY

 

REPORT

 
GRADE INSPECTION

Timber (4162)

& Lumber (4163)

Quality

AS                 462

Treated-Cert

 

 

 

 

 

 

 

 

 

 

 

 

Subdrain Pipe (4143)

Quality

AS  Cert   443, 448

 

Each Shipment

 

 

 

 

 

 

 

 

 

 

Flowable Mortar (2506)

Flow Test

                     375

 

 

 

 

 

V

RCE

1/4 hours (critical)

Visual  (noncritical)

 

RCE

Plant Report

Mix Design approval by DME

Lab mix for critical flow only

Grout for Stone Revetment 2507 and Fabric Formed Revetment

Air Content

                     318

                     340

 

 

 

 

 

V

RCE

1/half day

 

 

Plant Report

Fabric Formed Mix Design approval by DME

Flow Test

                     375

 

 

 

 

 

V

RCE

1/half day

 

 

 

Fabric Formed Revetment Only

Compressive Strength

                     315

 

 

 

 

 

 

 

 

 

 

 

Only when required by the DME

Foamed Cellular Concrete

Density

 

CONTR

Each Load

 

 

 

 

 

 

 

 

 

RCE Witness density test by CONTR

Bentonite

Flow Test

Visual             375

 

 

 

RCE

 

 

 

 

 

 

 

 

Hardened

Concrete

Smoothness

 

                   341s

CONTR

100%

 

CONTR

821301

V

DME

10%

 

DME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AS-Approved Source

Cert – Certification Statement

RCE-Resident Construction Engineer/Project Engineer

IA-Independent Assurance

ASD-Approved Shop Drawing

 

DME-District Materials Engineer

V-Verification

S&T-Sampling & Testing

 

CMB-Construction Materials Bureau

M-Monitor

 

 

CONTR-Contractor

 

NOTE:  RCE/CONTR indicates that the Contractor shall assist in the sampling at the direction of and witnessed by the Project Engineer.

NOTE: For Local agency projects with no Federal funding, Independent Assurance, IA, tests are not required.

NOTE: For Local agency projects with no Federal funding, verification samples or monitor samples sampled by the DME are not required. These samples may be sampled by the contracting authority. With prior approval, these samples may be tested by the Iowa Department of Transportation Central Laboratory.

NOTE: For Local agency projects with no Federal funding, smoothness verification testing may be tested and evaluated by the DME.