UFGS 31 23 00.00 20 Excavation and Fill

1 **USACE / NAVFAC / AFCEC / NASAUFGS-31 23 20 (February 2011)Change 2 - 08/15----------------------------------- -Preparing Activity: NAVFACS upersedingUFGS-31 23 20 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSR eferences are in agreement with UMRL dated January 2022**SECTION TABLE OF CONTENTSDIVISION 31 - EARTHWORKSECTION 31 23 20 Excavation AND FILL02/11, CHG 2: 08/15 PART 1 GENERAL REFERENCES DEFINITIONS Capillary Water Barrier Degree of compaction Hard Materials Rock Pile Supported Structure SUBMITTALS DELIVERY, STORAGE, AND HANDLING CRITERIA FOR BIDDING REQUIREMENTS FOR OFF SITE SOIL QUALITY ASSURANCE Shoring and Sheeting Plan Dewatering Work Plan UtilitiesPART 2 PRODUCTS SOIL MATERIALS Satisfactory Materials Unsatisfactory Materials Cohesionless and Cohesive Materials Expansive Soils Nonfrost Susceptible (NFS)

2 Material Common Fill Backfill and Fill Material Select Material Topsoil POROUS FILL FOR CAPILLARY WATER BARRIER UTILITY BEDDING MATERIAL Sand GravelSECTION 31 23 20 Page 1 SEWAGE ABSORPTION TRENCHES OR PITS Porous Fill Cover BORROW BACKFILL FOR UNDERDRAINAGE SYSTEMS FILTER FABRIC MATERIAL FOR PIPE CASING Casing Pipe Wood Supports MATERIAL FOR RIP-RAP Bedding Material Grout Rock BURIED WARNING AND IDENTIFICATION TAPE Warning Tape for Metallic Piping Detectable Warning Tape for Non-Metallic Piping DETECTION WIRE FOR NON-METALLIC PIPINGPART 3 EXECUTION PROTECTION Shoring and Sheeting Drainage and Dewatering Drainage Dewatering Underground Utilities Machinery and Equipment SURFACE PREPARATION Clearing and Grubbing Stripping Unsuitable Material Excavation Structures With Spread Footings Pile Cap Excavation and Backfilling Pipe Trenches Hard Material [and Rock]

3 Excavation Excavated Materials Final Grade of Surfaces to Support Concrete SUBGRADE PREPARATION Proof Rolling SUBGRADE FILTER FABRIC FILLING AND BACKFILLING Common Fill Placement Backfill and Fill Material Placement Select Material Placement Backfill and Fill Material Placement Over Pipes and at Walls Porous Fill Placement Trench Backfilling BORROW BURIED WARNING AND IDENTIFICATION TAPE BURIED DETECTION WIRE compaction General Site Structures, Spread Footings, and Concrete Slabs Adjacent Area Paved Areas Airfield Pavements PIPELINE CASING UNDER [RAILROAD] [AND] [PAVEMENT] Earthwork for Pipeline CasingsSECTION 31 23 20 Page 2 Steel Cased Pipelines Hole for Pipeline Casing Cleaning Piped Utilities End Seals SPECIAL EARTHWORK REQUIREMENTS FOR SUBSURFACE DRAINS Granular Backfill Without Filter Fabric Perforated or Slotted Wall Pipe Open-Joint Pipe Granular Backfill Using Filter Fabric Perforated or Slotted Wall Pipes Open-Joint Pipe Blind or French Drains EARTHWORK REQUIREMENTS FOR SEWAGE ABSORPTION [TRENCHES] [PITS]

4 RIP-RAP CONSTRUCTION Preparation Bedding Placement Stone Placement Grouting FINISH OPERATIONS Grading Topsoil and Seed Protection of Surfaces DISPOSITION OF SURPLUS MATERIAL FIELD QUALITY CONTROL Sampling Testing Fill and Backfill Material Testing Select Material Testing Porous Fill Testing Density tests Moisture Content tests -- End of Section Table of Contents --SECTION 31 23 20 Page 3**USACE / NAVFAC / AFCEC / NASAUFGS-31 23 20 (February 2011)Change 2 - 08/15----------------------------------- -Preparing Activity: NAVFACS upersedingUFGS-31 23 20 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSR eferences are in agreement with UMRL dated January 2022**SECTION 31 23 20 Excavation AND FILL02/11, CHG 2: 08/15**NOTE: This guide specification covers the requirements for earthwork requirements for buildings, roads, and to UFC 1-300-02 Unified Facilities Guide Specifications (UFGS) Format Standard when editing this guide specification or preparing new project specification sections.

5 Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable item(s) or insert appropriate information and requirements not required in respective project, whether or not brackets are , suggestions and recommended changes for this guide specification are welcome and should be submitted as a Criteria Change Request (CCR).**NOTE: Consult with a soils engineer while editing this section to determine specific requirements for each job.**NOTE: The following information shall be indicated on the project drawings:1. Surface elevations, existing and new;2. Location of underground obstructions and existing utilities;3. Location and record of soil borings and test pits.

6 Include ground water observations and topsoil SECTION 31 23 20 Page 4thickness encountered in boring, soil classifications, and properties such as moisture content and Atterberg limit determinations;4. Soil classification(s) and properties;5. Location of borrow and disposal area if located on Government property;6. Clearing stripping and grubbing limits, if different from clearing limits;7. Areas to be seeded;8. Hydrological data where available;9. Shoring and sheeting required (trench protection is specified in Corps of Engineers Manual EM 385-1-1);10. Pipe trench Excavation details;11. Location and limits of hard material (rocks);12. Details of special construction such as under railroad and highways right-of-way requirements for jacking and boring;13.

7 Details of sewage absorption trenches, absorption pits, and subsurface drains.**PART 1 GENERAL**NOTE: This guide specification does not include provisions for separate measurement and payment for any work specified herein. Measurement and payment paragraphs may be provided in the contract specifications when unit-price payment is more equitable for rock Excavation , borrow Excavation , and the removal and replacement of unsatisfactory material below grades indicated. This section includes requirements for clearing, grubbing, stripping, grading, and topsoiling. If the contract specifications contain separate sections on clearing, grubbing, grading and turf establishment, revise this section accordingly.** REFERENCES**NOTE: This paragraph is used to list the publications cited in the text of the guide specification.

8 The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and 31 23 20 Page 5 Use the Reference Wizard's Check Reference feature when you add a Reference Identifier (RID) outside of the Section's Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizard's Check Reference feature to update the issue dates. References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process.**The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation WATER WORKS ASSOCIATION (AWWA)AWWA C600(2017) Installation of Ductile-Iron Mains and Their AppurtenancesAMERICAN WELDING SOCIETY (AWS)AWS (2020.)

9 Errata 1 2021) Structural Welding Code - SteelAMERICAN WOOD PROTECTION ASSOCIATION (AWPA)AWPA C2(2003) Lumber, Timber, Bridge Ties and Mine Ties - Preservative Treatment by Pressure ProcessesAWPA P5(2015) Standard for Waterborne PreservativesASTM INTERNATIONAL (ASTM)ASTM A139/A139M(2016) Standard Specification for Electric-Fusion (ARC)-Welded Steel Pipe (NPS 4 and over)ASTM A252(2010) Standard Specification for Welded and Seamless Steel Pipe PilesASTM C33/C33M(2018) Standard Specification for Concrete AggregatesASTM C136/C136M(2019) Standard Test Method for Sieve Analysis of Fine and Coarse AggregatesASTM D422(1963; R 2007; E 2014; E 2014) Particle-Size Analysis of SoilsASTM D698(2012; E 2014; E 2015) Laboratory compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/cu.

10 Ft. (600 kN-m/cu. m.))SECTION 31 23 20 Page 6 ASTM D1140(2017) Standard Test methods for Determining the Amount of Material Finer than 75- m (No. 200) Sieve in Soils by WashingASTM D1556/D1556M(2015; E 2016) Standard Test Method for Density and Unit Weight of Soil in Place by Sand-Cone MethodASTM D1557(2012; E 2015) Standard Test methods for Laboratory compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)ASTM D1883(2016) Standard Test Method for California Bearing Ratio (CBR) of Laboratory-Compacted SoilsASTM D2216(2019) Standard Test methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by MassASTM D2321(2020) Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow ApplicationsASTM D2487(2017.