Materials Quality Assurance Procedures Manual
Materials Quality Assurance (QA) sampling and testing procedures described in this manual have been developed by Michigan Department of Transportation (MDOT) in accordance with Title 23, of The Code of Federal Regulations, Part 637. Objectives of the program include the design and implementation of sampling and testing procedures to assure that materials are in reasonably close conformity with plans and specifications. The Materials QA program includes acceptance sampling and testing, independent assurance testing, project materials certification, retention of sampling and testing records, verification of test procedures, calibration of testing apparatus and participation in the development and implementation of technical training for personnel involved in materials sampling and testing.
The Materials Quality Assurance Procedures Manual is found at the following link:
http://www.michigan.gov/mdot/0,4616,7-151-9622_11044_11367-207980--,00.html
2020 Summary of Revision to the MQAP
The Construction Field Services (CFS) Division has revised the Materials Quality Assurance Procedures (MQAP) Manual. A brief description of the major revisions is presented below.
Table of Contents Content deleted from the manual has resulted in subsequent chapters in the manual being re-indexed. The Table of Contents has been updated to reflect the changes.
Manual Section
1.04 Deleted reference to QPL from this section.
1.05 Deleted reference to random number table previously removed from this section.
2.02 Minor editorial changes to this section.
2.06 Added requirement to document the name and facility of the Approved Manufacturer of Portland/Slag Cement to the certification when certified by a distribution facility.
2.08 Removed reference to brick and block as they are no longer accepted by Approved Manufacturer certification. Removed reference to Manhole Bases being exempted from this procedure as they are now required to be manufactured in accordance with this section. Clarified the requirements for when quality assurance inspections of culverts is required.
3.04 Deleted the Prestressed Structural Precast Concrete Fabrication section. This content has now been incorporated into the new Structural Fabrication Quality Manual.
3.05 Deleted the Structural Steel Fabrication section. This content has now been incorporated into the new Structural Fabrication Quality Manual.
3.06 Deleted the Lighting, Signal and Sign Support Structure Fabrication section. This content has now been incorporated into the new Structural Fabrication Quality Manual.
3.11 Deleted the Non-Prestressed Structural Precast Concrete Fabrication section. This content has now been incorporated into the new Structural Fabrication Quality Manual.
4.02 Minor editorial changes to this section.
4.03 Editorial changes made to this section. Reformatted the MDOT Round Robin Testing Program Laboratory Audit Checklist information found in Appendix B.2 of section 4.03.02.
5.01 Updated the weblink provided for the Buy America content.
5.02 Removed the “Crack Filler (Alt 2)” from the title of the section. Alt 1 method of Overband has been removed from the Standard Specifications.
5.06 Revised the qualification procedure per the Materials Technology Unit to update content and requirements of the evaluation of Penetrating Water Repellent Treatment for Concrete Surfaces.
5.08 Updated the Submittal Procedure contact information.
5.09 Updated the Submittal Procedure contact information.
5.10 Updated the Submittal Procedure contact information.
5.27 Minor editorial changes to this section.
7.01 See the following table for revisions made to the Materials Acceptance Requirements Table.
References to the corresponding MQAP Section in the table have been updated to reflect changes in the indexing.
Materials Acceptance Requirements Table Revisions
| Specification Reference | Material Name | Basis of Acceptance | Change Made and Reason for Change |
|---|---|---|---|
| 502.02B | Overband Crackfill | VI & See Remark | Removed Asphalt Rubber and Alt 1 from Material Name per Materials Technology Unit. |
| 708.01 | Structural Prestressed Concrete Construction | Fabrication Inspection | Revised Spec No. and Material Name., revised Remarks to reference the new Structural Fabrication Quality Manual and Special Instructions, removed reference to the MQAP per the Structural Fabrication Unit. |
| 810.03O | Bridge Sign Connections | Fabrication Inspection | Revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
| 811.03D4 | Cold Plastic Tape, Preformed Pavement Marking Material | VI & See Remark | Revised the Material Name per Traffic and Safety Unit. |
| 906.04 | Structural Steel | Fabrication Inspection | Revised Remarks to reference the new Structural Fabrication Quality Manual and Special Instructions, removed reference to the MQAP per the Structural Fabrication Unit. |
| 906.08 | Pin and Link Plates for Steel Bridge Construction | Fabrication Inspection | Removed this material entry per the Structural Fabrication Unit. |
| 908.05 | Castings, Manhold Gray/Ductile Iron | VI | Added Ductile Iron to Spec. No. and Material Name per Structural Fabrication Unit. |
| 908.09A | Tubing, Steel Railings (Base Plate, Angle, and Non-Tubular Post Elements) | Fabrication Inspection | Removed sampling criteria, revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
| 908.09B | Tubing, Steel Railings (Rail Elements and Tubular Post Elements) | Fabrication Inspection | Removed sampling criteria, revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
| 909.04D | Precast Concrete Box Sections | Appr Mfr & See Remark | Clarified the Remarks when quality assurance inspections are required, revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
| 909.04G | Precast Concrete Three-Sided or Arch Culverts | Appr Mfr & See Remark | Clarified the Remarks when quality assurance inspections are required, revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
| 914.10 | Bolts for Structure Expansion Anchors | Gen Cert | Revised basis of acceptance from Test to Gen Cert, removed sampling criteria per the Structural Fabrication Unit. |
| 914.12A | Elastomeric Bearings | Gen Cert | Revised Spec No., revised the basis of acceptance from Test Data Cert to Gen Cert per the Structural Fabrication Unit. |
| 914.12B | Elastomeric Leveling Pads | Gen Cert | Added this material item per the Structural Fabrication Unit. |
| 918.10A | Tower Lighting Units | Fabrication Inspection | Revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
| 918.11A | Guy Wire | Gen Cert | Revised the basis of acceptance from Test to Gen Cert per the Structural Fabrication Unit. |
| 919.07 | Cantilever Sign Supports | Fabrication Inspection | Revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
| 919.08 | Truss Sign Supports | Fabrication Inspection | Revised Remarks to reference the new Structural Fabrication Quality Manual, removed reference to the MQAP per the Structural Fabrication Unit. |
Materials Acceptance Requirements Table Special Instructions Revisions:
708.01 Added special instructions for Prestressed Concrete per the Structural Fabrication Unit.
906.04 Added special instructions for Structural Steel per the Structural Fabrication Unit.
906.07 Revised the special instructions for High Strength Steel Bolts to indicate “Plate washers are not required to be sampled and tested.” per the Structural Fabrication Unit.
908.09C Revised the special instructions for Tubing, Steel Railings (Hardware) to indicate “Plate washers are not required to be sampled and tested.” per the Structural Fabrication Unit.
908.14 Revised the special instructions for Anchor Bolts, Nuts and Washers to indicate “Plate washers are not required to be sampled and tested.” per the Structural Fabrication Unit.
908.14D Revised the special instructions for Anchor Bolts and Nuts for Other Purposes to indicate “Plate washers are not required to be sampled and tested.” per the Structural Fabrication Unit.
909.04D Added special instructions for Precast Concrete Box Sections per the Structural Fabrication Unit.
909.04G Added special instructions for Precast Concrete Three-sided or Arch Culverts per the Structural Fabrication Unit.
2019 Summary of Revisions to the MQAP
The Construction Field Services (CFS) Division has revised the Materials Quality Assurance Procedures (MQAP) Manual. A brief description of the revisions is presented below.
Manual Section
Table of Contents Content deleted from the manual has resulted in subsequent Chapters in the manual being re-indexed. The Table of Contents has been updated to reflect the changes.
1.02 Deleted reference to Tested Stock in 1.02.02.B and 1.02.03.D.
1.04 Deleted reference to tested stock in 1.04.03.A.3. Added language requiring submittal at or prior to the pre-construction meeting. Added language requiring electronic signature of the MSL per 12SP-104E.
1.06 Added clarification to 1.06.02.A to describe the use of the maximum VI quantity limit. Deleted 1.06.02.C reference to Tested Stock Materials.
1.08 Numerous revisions to this chapter. Deleted 1.08.02.B.2 reference to Tested stock samples. Deleted 1.08.03.C reference to Tested Stock test reports.
2.01 Deleted General Tested Stock Procedures as this basis of acceptance is no longer part of the Quality Assurance program.
2.02 Deleted Tested Stockpiles of Aggregate as this content is covered in the Procedures for Aggregate Inspection Manual.
2.03 Added detail to the Sampling Schedules noted in 2.03.06.A and added 2.03.06.C. Deleted Prefabricated Drainage System from the Schedule 1 Certification Verification table per the Geotechnical Services Section.
2.06 Numerous revisions to this chapter. Detailed the certification requirements for Distribution facilities shipping Portland and Slag Cement for use on MDOT projects.
2.07 Numerous revisions to this chapter. Detailed the certification requirements for Distribution facilities shipping Flyash for use on MDOT projects.
3.02 Numerous revisions to this chapter.
3.06 Removed Steel Column Breakaway Traffic Sign Supports from this Chapter to coincide with the change in basis of acceptance per the Structural Fabrication Unit.
5.27 Added new qualification procedure for the evaluation of Hot-Poured Rubber, Extra Low Modulus, Joint and Crack Sealant per 914.04.A. Subsequent qualification procedures were re-indexed to reflect the entry of this new procedure.
6.01 See the following table for revisions made to the Materials Acceptance Requirements Table.
References to the corresponding MQAP Section in the table have been updated to reflect changes in the indexing.
Materials Acceptance Requirements Table Revisions
| Specification Reference | Material Name | Basis of Acceptance | Change Made and Reason for Change |
|---|---|---|---|
| 901.07 | Fly Ash, Pozzolanic Admixtures for Concrete | Appr. Mfr. | Added reference to MQAP Manual Section 2.07. |
| 902 | Granular Material Class II (Subbase), Class IIA and Class IIAA | Test | Added Class IIAA to the Material Name to define acceptance. |
| 903.02 | Liquid Chemical Admixtures | VI & See Remark | Revised the Material Name to match 2012 SSC and for clarification. |
| 903.04 | Calcium Chloride Concrete Accelerators | VI & See Remark | Revised the Material Name to match 2012 SSC and for clarification. |
| 909.04D | Precast Concrete Box Sections | Appr Mfr & See Remark | Added “as measured to the roadway centerline.” to the Remarks for clarification per the Structural Fabrication Unit. |
| 909.04G | Precast Concrete Three-Sided or Arch Culverts | Appr Mfr & See Remark | Added “as measured to the roadway centerline.” to the Remarks for clarification per the Structural Fabrication Unit. |
| 909.07A1 | Pipe for Underdrains Acrylonitrile-Butadiene-Styrene (ABS) | Test | Moved from Misc. #7 in table to 909 per 2012 SSC reference. |
| 909.08E | Culvert, Downspouts 3. Corrugated Polyethylene Pipe (Corrugated Type C) (CPE/HDPE) | Test | Added Sampling Frequency and Remarks. |
| 910.03D | Geogrids | Test | Revised Sampling Frequency and Remarks. |
| 910.05A | Prefabricated Drainage System | Test | Revised the basis of acceptance from Appr Mfr to Test, revised the Sample Size, defined Max VI, revised Remarks and added Special Instructions per the Geotechnical Services Unit. |
| 910.05B | Wall Drain | Test | Revised the Sampling Frequency, Sample Size, Max VI, added Remarks and Special Instructions per the Geotechnical Services Unit. |
| 912.08 | Wood Posts and Blocks for Guardrail and Highway Signs (Dimension Sawed) | Appr Mfr | Deleted Note as it was not applicable to this specification section per 2012 SSC. |
| 914.04A | Hot-Poured Rubber Joint Sealant | VI & See Remark | Added the material to the table, defined basis of acceptance and added Remarks to reference new QPL 914.04A per Materials Technology Unit. |
| 919.02A1 | Metal Sections (Extruded Aluminum) | VI & See Remark | Changed basis of acceptance from Tested Stock to VI, deleted Sample Frequency and revised Remarks per Structural Fabrication Unit. |
| 919.02A3 | Aluminum Sheet | VI & See Remark | Changed basis of acceptance from Tested Stock to VI, deleted Sample Frequency and Max VI, and revised Remarks per Structural Fabrication Unit. |
| 919.06 | Breakaway Column Sign Supports | VI | Changed basis of acceptance from Fab Insp to VI and revised the Remarks per the Structural Fabrication Unit. |
Materials Acceptance Requirements Table Special Instructions Revisions:
910.05 Added Special Instructions for Drainage Geocomposites per the Geotechnical Services Unit.
914.07 Revised instructions to describe the field inspections to be performed and to give information pertaining to reference materials available for the inspections published in the Construction Manual.
2018 Summary of Revisions to the MQAP
The Construction Field Services (CFS) Division has revised the Materials Quality Assurance Procedures (MQAP) Manual. A brief description of the major revisions is presented below.
Manual Section
1.05 Removed this chapter as the content for random sampling by the cube root method is no longer used.
1.05 Renumbered Section 1.06 to 1.05. Removed Section 1.05.06 of this chapter as it is covered by other contract documents. Removed concrete coring information as it is covered by other contract documents. Removed the details pertaining to relocation of a core in relation to transverse direction and proximity to the edge of pavement. This direction is defined in other contract documents.
1.08 Renumbered Section 1.09 to 1.08. Removed section 1.08.03.E that documented the testing requirements for warehouse items.
3.01 Removed the requirement for qualified product listed materials to be documented via a general certification.
3.08 Added requirements for third party certification for qualification of new plants. Revised section 3.08.12 to include annual requirements for plant certifications.
4.04 Added requirements for submittal and processing of the Materials Source List (form 501).
4.07 Added reference to the Load Transfer Assembly Inspection Report (form 0553).
4.11 Added requirements for submittal and processing of the Materials Source List (form 501).
4.12 Numerous revisions to this chapter.
6.06 Revised the qualification procedure to include new specifications for penetrating water repellent treatment for concrete surfaces.
6.23 Replaced the Class B Bury qualification procedure with the Class A, B and F Bury qualification procedure.
6.38 Added new qualification procedure for the evaluation of wet reflective beads and elements per 920.02.C. Subsequent qualification procedures were re-indexed to reflect the entry of this new procedure.
7.01 See the following table for major revisions made to the Materials Acceptance Requirements Table.
Aggregate sampling frequencies have been revised for all specified aggregate types presented in the table to cross reference to the Procedures for Aggregate Inspection Manual.
Changed the basis of acceptance for all QPL materials from general certification to Visual Inspection (VI) in the table.
| Specification Reference | Material Name | Basis of Acceptance | Change Made and Reason for Change |
|---|---|---|---|
| 909.06 | Plastic Pipe Class A, B and F Bury (CPE/HDPE and CPV) | VI | Added the revised pipe classes that are now included in the QPL. |
| 909.09 | Cold Applied Pipe Joint Sealer (Mastic) | VI | Changed the basis of acceptance from Test to VI per the Structural Fabrication Unit. |
| 913.06 | Precast Drainage Structure Adjusting Rings | Gen Cert | Changed the basis of acceptance from Appr. Mfr. to Gen Cert per CFS. |
| 914.04A | Hot-Poured Joint Sealant | N/A | Removed the material entry as it is now specified by 12SP-914B-01. |
| 914.05 | Epoxy Binder, For Joint Spall Repair | Test | Removed the option of Tested Stock as a basis of acceptance per CFS Materials Unit. |
| 917.04 | Tree Wrapping Material | N/A | Removed the material entry from the table per the Roadside Development Unit. |
| 920.02C | Wet Reflective Beads/Elements | VI | Added the material entry to the table per Traffic and Safety Division. Must be a QPL per 920.02C. |
| 922.04A | Barrier Reflector Markers Permanent | VI | Added entry to separate the material from the temporary markers. Change in basis of acceptance per Traffic and Safety Division. |
Materials Acceptance Requirements Table Special Instructions Revisions:
902 Added Special Instructions pertaining to the Pre-Qualified Supplier Program in the Procedures for Aggregate Inspection Manual. Specifically, how Project Engineers are to document passing QA tests with Region personnel.
909.06 Revised instructions to remove redundant information. Revised instructions for perforated pipe to indicate that tested stock is not permitted for clarification.
2017 Summary of Revisions to the MQAP
The Construction Field Services (CFS) Division has revised the Materials Quality Assurance Procedures (MQAP) Manual. A brief description of the major revisions is presented below.
Manual Section
1.02 Significant revisions to this chapter have occurred.
3.03 Removed “902.01 Aggregates - See Section 3.04.08 of this manual.” from the Schedule No. 2 Special Instructions. Removed “904.03C Emulsified Asphalt - See Section 3.06.06 of this manual.” from the Schedule No. 2 Special Instructions as this process is not applicable to the Region Materials staff. Added Operations Field Services sampling responsibilities for Pre-stressing Strand to the Schedule II Certification Verification Special Instructions.
4.04 Added Section 4.04.06 to define Stockpile Payment procedures when requested of and implemented by the Structural Fabrication Unit.
4.05 Added Section 4.05.07 to define Stockpile Payment procedures when requested of and implemented by the Structural Fabrication Unit.
4.06Added Section 4.06.06 to define Stockpile Payment procedures when requested of and implemented by the Structural Fabrication Unit.
4.07 Revised this chapter to redefine the fabrication inspection of Load Transfer Assemblies for Transverse Joints. Frequency of inspections was changed, allowable Visual Inspection limits were modified and the method of documentation of these inspections was revised.
4.11Added Section 4.11.06 to define Stockpile Payment procedures when requested of and implemented by the Structural Fabrication Unit.
6.04Revised the submittal process for the qualified products evaluation procedure of Non-Shrinking Mortar and Grout, Premixed, Type H-1 (Non-Metallic). Revised physical requirements reporting.
7.01See the following table for major revisions made to the Materials Acceptance Requirements Table.
Aggregate sampling frequencies have been revised for all specified aggregate types presented in the table to cross reference to the Procedures for Aggregate Inspection Manual.
Materials Acceptance Requirements Table Major Revisions
| Specification Reference | Material Name | Basis of Acceptance | Change Made and Reason for Change |
|---|---|---|---|
| 810.03O | Bridge Sign Connections | Fabrication Inspection | Added material to define basis of acceptance per Structural Fabrication Unit. |
| 908.09C | Tubing, Steel Railings (Hardware) | Test | Per Structural Fabrication Unit, redefined the sample size and frequency to indicate “1 assembly” per sample. |
| 908.14 | Anchor Bolts and Nuts for Other Purposes | Test | Per Structural Fabrication Unit, redefined the sample size and frequency to indicate “1 assembly” per sample. |
| 914.07 | Transverse Pavement Joints (Dowel Bars) | Appr. Mfr. | Per CFS Materials Unit, removed the option of testing if not from an approved manufacturer. Increased the Maximum VI Quantity from 240 to 1200 bars. |
| 914.07 | Transverse Pavement Joints (Load Transfer Assemblies) | Appr. Mfr. | Per CFS Materials Unit, removed the option of testing if not from an approved manufacturer. Increased the Maximum VI Quantity from 20 to 100 assemblies. |
| 919.02 | Signs (Permanent) | See Remark | Removed reference to Joint Construction IM 1997 C-S per CFS Construction-Operations Unit. |
| 921.05 | Traffic Signal Strain Pole | Gen Cert | Changed the basis of acceptance from Test Data Cert to Gen Cert per the Structural Fabrication Unit. |
| 922.06C | Temporary Traffic Control, Pavement Marking Cover | Gen Cert | Added material to define basis of acceptance. Must be Qualified Product. |
Materials Acceptance Requirements Table Special Instructions Revisions:
902 Removed this content from the Special Instructions as this will now be referenced in the Aggregate Inspection Manual
908.09A Added instructions to indicate documentation required when submitting a sample.
908.09B Added instructions to indicate documentation required when submitting a sample.
908.09C Detail added to clarify an “Assembly”.
908.14 Detail added to indicate cantilever type sampling frequencies and stainless steel anchors bolts are not required to be tested.
908.14D Detail added to clarify an “Assembly”.
914.07 Added reference to the Materials Quality Assurance Procedures Manual, Chapter 4.07 (Load Transfer Assemblies for Transverse Joints), which documents the field inspection of these materials.
2016 Summary of Revisions to the MQAP
The Construction Field Services (CFS) Division has revised the Materials Quality Assurance Procedures (MQAP) Manual. A brief description of the major revisions is presented below.
Manual Section
1.08 Revised this chapter to include methods of tagging samples.
3.01 Revised the Certification Documentation requirements. Eliminated the quantity requirement, clarified that the material can be certified by the contractor, and included language to clarify the general certification requirements of QPL products.
3.07 Revised this chapter to include slag cement.
3.08 Revised this chapter to include submittal requirements for qualifying new facilities.
3.09 Deleted chapter 3.09 Temporary Concrete Barrier in its entirety and replaced it with Concrete Pipe, Culvert, and Related Items, previously chapter 3.10.
3.10 Revised this chapter to remove the fabrication inspection and acceptance of culverts, revised to chapter 3.09.
4.04 Significant revisions to this chapter have occurred.
4.05 Significant revisions to this chapter have occurred.
4.06 Significant revisions to this chapter have occurred. Combined chapter 4.10 (Tower Lighting Unit Fabrication) and 4.11 (Traffic Signal Mast Arm Pole and Mast Arm) into this chapter.
4.10 Replaced with new chapter Temporary Traffic Control Certification and Acceptance Procedure.
4.11Replaced with new chapter Non-Prestressed Structural Precast Concrete Fabrication.
4.13Significant revisions to this chapter have occurred.
6.17 Revised the submittal procedure and yearly update procedure for the qualification of admixtures for concrete.
6.39 Revised procedure to allow for the qualification of black colored temporary pavement marking materials.
7.01 See the following table for major revisions made to the Materials Acceptance Requirements Table.
Materials Acceptance Requirements Table Major Revisions
| Specification Reference | Material Name | Basis of Acceptance | Change Made and Reason for Change |
|---|---|---|---|
| 715.02 | Abrasive, Steel Grit | VI | Added material to define basis of acceptance. |
| 811.03D9 | Preformed Thermoplastic, Preformed Pavement Marking Materials | Gen Cert | Added this material, must be selected from the published QPL. |
| 901 | Cement | Appr. Mfr. | Removed the option of testing if not from an approved manufacturer. |
| 901.06 | Slag Cement | Appr. Mfr. | Removed the option of testing if not from an approved manufacturer. |
| 901.07 | Fly Ash, Pozzolanic Admixtures for Concrete | Appr. Mfr. | Removed the option of testing if not from an approved manufacturer. |
| 902 | Aggregates | Test | Revised sample size for Coarse, Dense-Graded, Open-Graded, Granular Class I, II, IIA, and III from 50 lbs. to 60 lbs. per Aggregate
Quality Unit. |
| 903.03 | Latex Admixture for Concrete | Appr. Mfr. | Removed the option of testing if not from an approved manufacturer. |
| 908.09A | Tubing, Steel Railings (Base Plate, Angle, and Post Elements) | Fabrication Inspection | Changed the basis of acceptance from Tested Stock to
Fabrication Inspection per the Structural Fabrication Unit. |
| 908.09A | Tubing, Steel Railings (Rail Elements) | Fabrication Inspection | Changed the basis of acceptance from Tested Stock to Fabrication Inspection per the
Structural Fabrication Unit. |
| 916.07 | Turbidity Curtain | VI | Added this material to define basis of acceptance per Geotechnical Services Unit. |
| 917.12 | Grass Seeding Mixtures | VI & See Remark | Changed sample frequency, sample size and maximum VI quantity to match with FUSP 12SP816A. |
| 922.04 | Temporary Concrete Barriers | Test Data Cert See Remark | Revised Remark to delete previous language and include: “Contractor must provide
certifications and documentation confirming the TCB provided meets the requirements of subsection 922.04.A of the Standard Specifications for Construction.” Per MDOT Barrier Advisory Committee. |
Materials Acceptance Requirements Table Special Instructions Revisions:
Note: Numerous Special Instructions were added per the Structural Fabrication Unit to remove language from the Remarks column of the Acceptance Requirements Table to allow for more detail to be presented in the special instruction/remark noted.
910.03 Geotextiles - Revised the First Sample frequency requirement and the maximum VI per the Geotechnical Services Unit.