Scope of Work.pdf

DESCRIPTION/SPECIFICATIONS/SCOPE OF WORK STATEMENT

PART I – GEOTECHNICAL EXPLORATION

1.0 Geotechnical Exploration

1.1 General. The purpose of the work specified herein is to provide information for the evaluation of subsurface conditions. Such information is dependent on accurate logs of the subsurface conditions and characteristics, the recovery of the highest percentage of sample possible, and the recording of natural conditions such as water levels. Access to sites to include clearing of overgrowth, brush or trees, drilling equipment, water for drilling, and repair of damage to exploration sites necessitated by access and/or the drilling process shall be part of the requirements. The amount of drilling and sampling, which actually will be required is unknown and will be governed by conditions encountered as the work progresses. The Contracting Officer reserves the right to direct the sequence of work. The drilling, sampling, logging and other services (where required), shall be performed in accordance with the references indicated in 1.1.2 below, unless otherwise directed by the Contracting Officer. In addition, the Contractor shall have an appropriate Job Safety Hazard Analysis Plan in place for all types of drilling, sampling and analysis activities covered in this scope of work.

1.1.1 Capabilities. The Contractor shall supply the necessary plant, equipment, manpower, materials, and supplies to permit land-based or overwater drilling,sampling and other services to a maximum depth of 150 feet below the working surface. If the Contracting Officer determines, as work progresses, that holes of greater depth are required, this additional drilling will be ordered in writing and paid for at a negotiated unit price.

1.1.2 References. The Contractor shall follow the latest versions of the listed references.

1.1.2.1 Department of the Army, Corps of Engineers, Engineer Manuals.

EM 385-1-1 Safety and Health Requirements Manual

EM 1110-1-1804 Geotechnical Investigations

EM-1110-2-1907 Soil Sampling

203-80 Rock Testing Handbook

1.1.2.2 American Society For Testing and Materials (ASTM).

C 117 Standard Test Method for Materials Finer Than 75-µm (No. 200) Sieve in Mineral Aggregates By Washing

C 127 Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate

C 136 Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

C 295/C295M Standard Guide for Petrographic Examination of

Aggregates for Concrete

C 469/C469M Standard Test Method for Static Modulus of

Elasticity and Poisson’s Ratio of Concrete in Compression

D 422 Standard Test Method for Particle-Size Analysis of Soils

D 698 Standard Test Methods for Laboratory Compaction

Characteristics of Soil Using Standard Effort

D 1140 Standard Test Methods for Amount of Material in

Soils Finer Than the No. 200 (75-µm) Sieve

D 1452 Standard Practice for Soil Exploration and

Sampling by Auger Borings

D 1557 Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort

D 1586 Standard Test Method for Standard Penetration Test

(SPT) and Split-Barrel Sampling of Soils

D 1587 Standard Practice for Thin-Walled Tube Sampling of Soils for Geotechnical Purposes

D 1883 Standard Test Method for CBR (California Bearing

Ratio) of Laboratory-Compacted Soils

D 2113 Standard Practice for Rock Core Drilling and

Sampling of Rock for Site Investigation

D 2166 Standard Test Method for Unconfined Compressive

Strength of Cohesive Soil

D 2216 Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass

D 2435/D 2435M Standard Test Method for One-Dimensional

Consolidation Properties of Soils Using Incremental Loading

D 2487 Standard Practice for Classification of Soils for

Engineering Purposes (Unified Soil Classification System)

D 2488 Standard Practice for Description and Identification of Soils (Visual-Manual Procedures)

D 2573 Standard Test Method for Field Vane Shear Test in Cohesive Soil

D 2850 Standard Test Method for Unconsolidated-

Undrained Triaxia Compression Test on Cohesive Soils

D 2936 Standard Test Method for Direct Tensile Strength of

Intact Rock Core Specimens

D 3080/D 3080M Standard Test Method for Direct Shear Test of Soils under Consolidated Drained Conditions

D 3441 Standard Test Method for Mechanical Cone

Penetration Tests of Soil

D 3740 Standard Practice for Minimum Requirements for

Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

D 4253 Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table

D 4254 Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density

D 4318 Standard Test Methods for Liquid Limit, Plastic

Limit and Plasticity Index of Soils

D 4719 Standard Test Methods for Prebored Pressuremeter

Testing in Soils

D 4767 Standard Test Method for Consolidated Undrained

Triaxial Compression Test for Cohesive Soils

D 5079 Standard Practices for Perserving and Transporting Rock Core Samples

D5434 Standard Guide for Field Logging of Subsurface

Explorations of Soil and Rock

D 5753 Standard Guide for Planning and Conducting

Borehole Geophysical Logging

D 5778 Standard Test Method for Electronic Friction Cone and Piezocone Penetration Testing of Soils

D6032 Standard Test Method for Determining Rock

Quality Designation (RQD) of Rock Core

D6167 Standard Guide for Conducting Borehole

Geophysical Logging: Mechanical Caliper

D 6274 Standard Guide for Planning and Conducting

Borehole Geophysical Logging - Gamma

D 6635 Standard Test Method for Performing the Flat Plate

Dilatometer

D 7012 Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures

D 7181 Standard Test Method for Consolidated Drained

Triaxial Compression Test for Soils

E 145 Standard Specification for Gravity-Convection and

Forced-Ventilation Ovens

E 329 Standard Specification for Agencies Engaged in

Construction Inspection, Testing, or Special Inspection

1.1.2.3 U.S. Department of Labor, Occupational Safety and Health Administration (OSHA).

29 CFR 1926.652 Requirements for Protective Systems.

1.1.3 Task Orders. Each proposed task order will be discussed by the Contractor and the

Contracting Officer as necessary to develop a mutual understanding of the type of drilling desired, sampling methods and intervals required. A task order for each assignment will be issued in writing by the Contracting Officer, and will include the project location, funding citation, type and number of borings required, sampling required, starting and estimated completion date. A minimum of 3 working days lead time will be given on each task order.

Extension may be granted under special conditions by the Contracting Officer. Work shall be started within 15 working days after awardance of a task order, unless otherwise indicated within the task order.

1.1.4 Subcontracting. The Contractor may at his option and with approval of the

Contracting Officer, sub-contract all or any part of the drilling, or other functions described by this contract. It will be the responsibility of the Contractor to see that all applicable parts of the specifications are met for all work done by a sub-contractor, including the qualifications of personnel, delivery of samples, validation of subcontract laboratory test procedures, and on-schedule completion of work. Overhead may be paid for processing through the subcontractor’s invoices, as negotiated by task order.

1.1. 5 Location. The work will be geotechnical investigation at various sites outside of the continental United States (OCONUS). The locations outlined in this work shall include but not be limited to Puerto Rico, Alaska, Virgin Islands, and other Caribbean islands. The Contractor may be required to perform drilling and sampling of hazardous waste sites requiring up through Level C personal-protection per United States Environmental Protection Agency guidelines. These guidelines are available for inspection at the U.S. Army Engineer District, 1222 Spruce Street, St. Louis, Missouri 63103-2833, Geotechnical and HTRW Branch, Room

4.306. The Contractor should be aware that any labor relations or union matters related to work performed under this contract are the Contractor’s responsibility and will not be allowed to interfere with the work.

1.1.6 Drilling Mobilization and Demobilization, Land and Overwater. Mobilization shall consist of the preparation and delivery to the work site of all resources necessary to complete the work outlined in the task order to include labor and travel time. For Land-based mobilization, these resources shall include but are not limited to; plant, equipment, materials, and supplies to be furnished by the Contractor. The contractor shall ensure the satisfactory working order of all such plant and equipment on the job, and the satisfactory storage at the site of all such materials and supplies. For Overwater mobilization shall consist of the delivery to the work site of all resources, to include but not limited to; drilling barges, jackup boat or barge, cranes, boats, plant, equipment, materials, and supplies required to perform overwater drilling and sampling. Demobilization shall consist of the removal from the site of all resources, to include but not limited to, plant, equipment, unused supplies, and drilling wastes both solid and liquid remaining after completion of the work and the return of the land to a condition as near to its original state as possible. Demobilization shall consist of the removal of all contractor resources and waste from the work site to include labor and travel time.

1.1.7 Right-of-Entry. The right-of-entry needed for this work will be furnished by the Government. In the event the Contractor desires right-of-entry not provided by the Government for ingress/egress across private property or for other purposes, it shall be the sole responsibility of the Contractor to obtain such right-of-entry and the Government shall be held free of any cost, expense, or liability of any kind in connection therewith. Any relocation of borings shall require prior approval by the Contracting Officer.

1.1.7.1 Utilities and Traffic Control. Locating and marking utility locations that may interfere with or prevent drilling or drilling access shall be the responsibility of the Contractor.

The Contractor shall coordinate with the appropriate utilities and receive clearance prior to any drilling. Traffic control may be required by local entities and is the responsibility of the Contractor. Traffic control, utility shielding, utility de-energizing or other relate measures shall be negotiated per individual task order as the cost will vary with each task order. Any relocation of borings shall require prior approval by the Contracting Officer.

1.1.7.2 Railroad Encroachment. The location of some borings may be in close proximity to railroads requiring flagmen and indemnity insurance. It is the contractors responsibility to identify the railroad encroachment. Payment for additional items such as permits and insurance shall be negotiated per individual task order as the cost will vary with each task order.

1.1.8 Order of Work. The order in which the work is to be accomplished shall be as directed by the task order or as determined in the field by the Government.

1.1.9 Reports. Reports shall include but are not limited to, ENG Form 1836 "Drilling Log", WES Form 797 "Relief Well Installation Report", WES Form 796 "Relief Well Pumping Test Report", WES Form 798, “Piezometer Installation Report”, and ENG Form 2087 "Gradation Curves" for filter pack samples. When required by task order, the Contractor shall ensure the completion of a detailed log, using ENG Form 1836, for each hole. All original reports shall be prepared in the field.

1.1.10. Photography. Some work activities described herein require photography. These photographs shall be taken using digital camera(s) set at 14 megapixels or greater resolution.

Wide-angle capabilities will be required to adequately capture appropriate detail in some of the photographs (core runs, core boxes, hole location, etc.). Digital SLR cameras, with 28 mm (equivalent in a 35mm camera or less) wide angle lens may be required to adequately ensure complete coverage of the subject while maintaining maximum detail. The Contractor should bid the work understanding that excellent photographic quality is required whenever photographs are specified, and that the Contracting Officer will require, at the Contractor’s expense, either retakes of poor quality photographs, or a repeat of the work if required to ensure high quality photographic documentation. Appropriately named photographs shall be provided to the Contracting Officer Representative through https://safe.apps.mil/All drilling activity photographs (hole locations, stakes, core runs, core boxes, etc.) for a particular task order shall be provided unless otherwise specified under a task order. No separate payment will be made for photographs required for any of the services specified within this contract.

1.11 Cleanup of Work Sites. During the progress of the work, the Contractor shall clean the work area daily to prevent the accumulation of trash and debris. Additionally, the Contractor shall, upon completing exploration operations, clean up all scrap, waste material, waste drilling mud, oil or other waste generated during the work; backfill of all excavations, removal of all cribbing or drilling pads, resulting from operations; and as much as reasonably possible, return the drill sites, access roads, and the overall site to its original condition by grading, dressing and providing replacement soil and vegetation for all disturbed areas; and check that all hole location stakes are in places. All costs associated with this work shall be included in the unit price for the appropriate items, and no separate payment will be made.

1.2 Personnel

1.2.1 Drilling Crew. The drill crew shall consist, at a minimum of two crew members, not including the Geologist, and any other crew members necessary to adequately and efficiently operate the drilling, sampling and other testing equipment. All personnel directly involved with hazardous waste drilling, sampling, testing and/or other services shall be in compliance with the training and medical surveillance requirements set forth in Title 29, Part 1910, Section 120 of the Code of Federal Regulations. Resumes of newly hired supervisory driller, geologist or log reviewer (if applicable) performing work under this contract shall be submitted to the Government for approval at least 14 calendar days before commencement of any task order that newly hired individuals shall work on. When a Registered or Professional Geologist is not available for field logging, all logs shall be reviewed by either a Registered or Professional Geologist or Professional Engineer.

1.2.2 Supervisory Driller. The supervisory driller shall have a minimum of five years experience in drilling, sampling, testing, and be trained in the preparation, monitoring and use of drilling fluids in mud rotary drilling methods for use in engineering and/or hazardous and toxic waste investigations. The supervisory driller shall be present during all drilling, sampling and field testing activities performed under this contract. The supervisory driller shall be qualified under applicable State and local regulations to perform the work as specified.

1.2.3 Geologist. When required by task order, the Contractor shall furnish a professional, licensed or registered geologist to perform the field logging and record keeping. Any work produced by non -licensed or -registered geologists shall be reviewed by a licensed or registered geologist prior to submission of records to USACE. Field logging shall be in accordance with section 1.5 below. The geologist shall be present during all drilling, sampling, subsurface instrumentation, well and piezometer installation, and in situ testing, unless otherwise specified in the task order from the Contracting Officer. The geologist shall be experienced in the preparation of geotechnical drill logs and the field classification of soils by the Unified Soil Classification System in accordance with ASTM D 2488.

1.3 Exploration Equipment and Supplies. All equipment proposed by the Contractor shall be available for inspection by a representative of the Contracting Officer prior to or after award of the contract. All equipment shall be in first class condition. Contractor's equipment proposed for use in this contract judged by the Contracting Officer to be unsuitable will be a basis for rejection of the Contractors bid. The Contracting Officer has the right to prohibit the use of any piece of equipment due to its condition, incompatibility with other equipment or scope incompatibility, or is not conducive to safely obtaining high quality samples. Equipment that is rented for a task order shall be submitted for Government approval and shall comply with EM 385-1-1.

1.3.1 Sampling Equipment -. Equipment to be furnished by the Contractor for sampling shall include, but not be limited to:

• Split-spoon drive samplers (1 3/8-inch i.d., 2-inch o.d. and 2 ½-inch i.d., 3-inch o.d.)

• Continuous sampling hollow stem system similar or equal to the Central Mine Equipment or Mobile hollow stem continuous samplers,

• Barrel-type augers, such as the Vicksburg or McCart Auger, hollow stem augers or types approved by the Contracting Officer

• Tricone (roller) bits up to 12 inches in diameter,

• Casing Advancement System

• Fixed piston samplers

• NQ, NX, HQ, PQ, 4”x5.5” double-tube core barrel with appropriate diamond bits, drill rods, reaming shells and casing.

1.3.2 Drilling Equipment. Machinery shall be of the "hydraulic feed" type direct rotary drill, and shall be equipped with an automatic hammer, and possess hydraulic leveling devices on the truck, ATV, or cargo carrier. An ATV or cargo carrier may be required on some drill sites. All drilling rigs and pumps shall be equipped with drill head feed pressure and water pressure gages as well as having the capablity to push CPT as directed in Section 4.Machinery may also be of reverse circulation type rotary rig. Other drilling equipment shall include but not be limited to portable cuttings pit, casing, piping, pumps, drill rods, bits, tools, and power necessary to accomplish the required drilling. All gages shall be calibrated every three months, or after repairs to gages.

1.3.2.1 Automatic Hammer. The automatic hammer shall be used for all Standard Penetration Tests (SPT), in accordance with ASTM D 1586, and shall be capable of lifting a 140-pound drive weight and completely releasing the weight for a 30-inch freefall to provide a driving rate of from 5 to 40 blows per minute. Approval of the automatic hammer will require submittal of test results from an experienced firm showing the dynamic energy analysis. Any automatic hammer used in performance of this work shall be analyzed for energy delivered to the drive rods on an annual frequency or after repairs to the automatic hammer, or as directed by the Contracting Officer. Use of manual hammers with appropriate calibration will be accepted by exception only and shall be approved in advance.

1.3.2.2 Shallow Water Drilling Equipment. Shallow water areas may require the use of shallow draft drilling and support equipment. Shallow water drilling may be required per the task order for areas that hold shallow water for an extended period of time, are not accessible by land-based drilling equipment, and are not navigable or accessable via floating plant. In addition to the above, when shallow water conditions do permit accessibility by floating plant, the Contractor shall, when directed by task order, supply the necessary plant, equipment and personnel to support the drilling and sampling of shallow overwater borings, including helper boat(s), work barges, jackup barge or boat, cranes and operators. The floating plant shall possess its own source of mobility power be it internal or a separate boat capable of moving the plant, and shall have adequate spud anchors to allow a steady, fixed position during drilling. Shallow overwater drilling may continue up to a maximum water level equal to flood stage on the local river gage. A push boat of sufficient power to handle the loaded drilling barge, in exposed, open-water conditions, shall accompany the barge at all times. All floating plant shall conform to U.S.

Coast Guard requirements and EM 385-1-1 to ensure safe operation.When required by navigation or other river conditions, and as directed by the Government, the Contractor shall provide additional helper boat(s) to prevent or minimize impediments to navigation caused by the shallow overwater drilling operation.

1.3.2.3 Excavation Equipment. The Contractor shall, when directed by task order, supply the necessary plant, equipment and personnel to support the sampling of soil by test pits/trenches.

All excavation work shall be performed in accordance with all State and local regulations and the applicable standards and guidelines set forth in Section 1.1.2. The test pit/trench equipment shall be capable of opening a cross-sectional area large enough to permit efficient excavation and shoring/lining or laying-back of the slope, engineering and geological inspection and photographing of the subsurface soils, and manual undisturbed sampling from within the test pit/trench. Trenches or test pits are typically in the range of 10-15 feet in depth. Samples shall be collected, as directed by task order, either in jars or as bulk samples weighing of 80 to 100 pounds total sample weight collected. Jars or bulk samples shall be labeled as to project, trench number and depths from which they were obtained. Jar samples shall also be taken from each bulk sample. Government representatives may observe and photograph the test trenches or pits. A detailed log of the trench/pit shall be completed in accordance with Appendix B of EM 1110-1-1804, complete with soil descriptions, depths and any other pertinent information. The Contractor shall assume that no dewatering will be necessary. Samples shall be identifed and described in the field in accordance with ASTM D 2488. The test pit/trench excavation shall be backfilled following completion of the investigation. Backfill procedures will be specified in the individual task order, however at a minimum the Contractor shall restore the excavated soil profile to its original condition/topography.

1.3.3 Drilling and Sampling Supplies. Drilling supplies to be required under this contract shall include but not be limited to all water, drilling mud, bentonite, portland cement, biodegradable fluid additives, and all other additives (barite, salts, etc.) necessary to accomplish the required drilling, sampling, and backfilling. Sampling supplies shall include but not be limited to wood core boxes, corrugated plastic core boxes, thin walled tubes with slip on caps (5- inch diameter by 36-inch long tubes and 3-inch diameter by 30-inch long tubes), sample jars, sample baggies, lids and boxes for transportation of jars. Sample supplies shall include 5-gallon plastic buckets with air-tight, sealable lids, bags, wax, duct tape, plastic cylinder molds with caps, and core preservation materials, including but not limited to Parafilm M, aluminum foil, and 3-mil plastic tubing, as directed by Task Order.

1.4 Drilling and Sampling Procedures

1.4.1 General. Drilling and sampling procedures shall be performed in accordance with all State and local regulations and the applicable standards and guidlines presented in Section 1.1.2

1.4.2 Boring Locations. The location of each completed boring shall be field recorded by the Contractor using a Global Positioning System (GPS) hand held unit, possessing WAAS capability, to accurately measure to within 10 meters in the horizontal, in the appropriate datum, coordinates shall be given as Latitude and Longitude in decimal degrees or as described by task order. In addition, the completed boring shall be staked and flagged in such a manner to permit surveyors to quickly record its location. A detailed sketch shall be included on the drilling log showing the location of the boring relative to stationary objects with measurements to the nearest

1.0 ft.

1.4.3 Drilling Methods. The appropriate drilling methods shall be based on the geotechnical conditions present, the compatibility with the required sampling, and the requirements of the individual task order.

1.4.3.1 Soil Drilling Methods . In general, for soil, dry drilling methods for advancing the hole shall be used above the water table or saturated zone.

1.4.3.1.1 Non-HRTW Soil Drilling Methods. These include but are not limited to hollow stem auger drilling with center plug, barrel auger drilling, or other approved techniques for producing representative samples during hole advancement. Mud rotary drilling methods shall be used below the water table or in the saturated zone. It is the Contractor’s responsibility to assure that the drilling mud is appropriate for the intended purpose of the boring and retains an open, clean hole during the drilling and sampling. The use of bottom discharging bits is prohibited.

1.4.3.2 Rock Drilling Methods. In borings where the depth to rock is to be judged without rock coring, top of rock shall be probed with a tricone roller bit a minimum of 5 feet or as directed by Task Order. The geologist shall judge the bedrock type, depth and condition based on drill action and cuttings and record the description on the drilling log.

1.4.3.3 Diamond Core Drilling. Rock core drilling shall conform to the requirements of

ASTM D2113. Rock core drilling shall include but not be limited to NQ, NX, HQ, PQ, 4”x5.5” or as directed by the task order. Rock core drilling shall be an approved, standard and accepted method of double-tube rotary rock core drilling using diamond coring bits which obtain continuous and complete rock cores of standard diameter for the respective bit size.

1.4.4 Sampling Procedures. Samples shall be obtained by one or more of methods herein, and as described in the Task Order. Soil samples shall be identified and described in the field in accordance with ASTM D 2488, “Standard Practice for Description and Identification of Soils (Visual-Manual Procedure). Rock core samples shall be identified and described in the field in accordance with EM 1110-1-1804 - Geotechnical Investigations. All soil samples (jars, tubes, buckets, etc) shall be labeled All labels shall be completed in full and shall at a minimum, include the Boring No., Sample No., and Depth of the sample taken.

1.4.4.1 Standard Penetration Test Method – SPT (ASTM D 1586). The soil shall be sampled in accordance with ASTM D1586 by standard (SPT) 2-inch o.d. split-spoon sampler at an interval not greater than five feet, or as directed by Task Order. When a change of material is detected during the process of drilling, the drilling shall be stopped, the depth determined, and a sample taken immediately. The sampler shall be driven by an approved automatic hammer as described in Section 1.3.2.1. The number of blows required for each 6 inches of penetration shall be recorded on the drilling log. Refusal is defined as penetration of 1 inch or less for 50 blows. Where samples are not obtained, a second attempt using a 3-inch split-spoon may be required. SPT samples shall be placed in jars and labeled according to Section 1.5 Records, below. Soils in the same SPT sample with different classifications shall be placed in seperate jars and labeled according to Section 1.5, Records, below.

1.4.4.2 Continuous Hollow Stem Auger Sampler (ASTM D 1452). When required, continuous overburden samples shall be taken with a 3-inch split barrel hollow stem continuous sampler. Samples shall be removed from the barrel, logged, and wrapped in Parafilm-M or equal laboratory film, then placed in 3 mil clear poly tubing (large enough to loosely fit over wrapped sample). The poly tubing ends shall be doubled over and taped around the sample to prevent moisture loss. The sample shall be placed in 4-inch diameter waterproof containers for protection, and labeled according to Section 1.5, Records, below.

1.4.4.3 Undisturbed Sampling (ASTM D 1587). Undisturbed sampling shall be performed using 3-inch diameter by 30-inch long cylindrical sample tubes as directed by Task Order. The Task Order may require the use of a fixed-piston type sampler . The sampling apparatus shall be of a design similar to the Hvorslev-type or Osterberg type fixed-piston sampler. Other fixed-piston sampler designs may only be used with Government approval. All sample tubes shall be smooth, round and free of dents. The tubing shall be of either seamless or welded construction. Any welds or seams shall be constructed such that the projection from the inside surface shall not exceed the thickness of the tubing. The cutting edge of the tubes shall be sharp and free of nicks. The tubes shall be new, clean, free of rust, and lightly oiled.Samples shall be typically capped in their sample tubes or, if required by Task Order, extruded in the field. If capped in the sample tubes, the ends shall be cleaned of any disturbed material, a representative jar sample taken from the bottom end, and the ends sealed with a commercially available paraffin wax to be approved by the Government. Cylinders and sealed sample tubes shall be labeled as designated by Task Order. Samples shall be taken at intervals specified by Task Order. Refusal will be considered reached when the sampler will not penetrate the soil sufficiently for a recovery with a pushing pressure of 600 psi or greater. If refusal is encountered, the contractor may be required to attempt a “driven sample” using the auto-hammer and anvil.

All “driven samples” shall be clearly labeled “driven sample”.

1.4.4.4 Bulk Samples. Bulk samples may be obtained using standard barrel augers, flight augers, or other approved method. Samples shall be taken at intervals specified, and shall total between 80 and 100 pounds each. Sample material shall be placed in commercial quality, 5-gallon buckets and sealed with air-tight lids. Each bucket shall be labeled as to project, boring number and depths from which it was obtained. Representative jar samples shall also be taken from each bucket for classification testing and labeled as designated by Task Order and in accordance with Section 1.5, Records, below.

1.4.4.5 Core Samples. (ASTM D 5079). Rock core samples shall be handled as specified in ASTM D 5079. Core may be broken to fit in core boxes provided such breaks are properly labeled in the box and on the log to identify their origin. All core samples shall be retained.

Wooden spacers shall be used to separate individual coring runs and any voids encountered, regardless of the type of core box. For preservation, the core shall be kept moist from the time it is removed from the sampler. The core shall be wrapped in Parafilm-M or approved equal laboratory film and placed in 3 mil clear poly tubing (large enough to loosely fit over wrapped core). The poly tubing ends shall be doubled over and taped around the core to prevent moisture loss and labeled in accordance with Section 1.5, Records, below.

1.4.5 Backfilling Borings. Backfilling of borings shall be performed in accordance with all applicable State and local requirements. As a minimum, boreholes shall be tremie grouted from the bottom up, with a neat cement grout immediately upon completion, unless noted otherwise in the Task Order. The grout shall consist of a mixture of type 1 Portland cement, powder bentonite, and water in the proportion of no more than 6 gallons of water per 94 pound bag of cement. The bentonite powder proportion shall be 3-5% (by dry weights) of the cement proportion and shall be hydrated prior to mixing with the cement. Borings shall be tremie backfilled by inserting a grout pipe to the bottom of the hole and pumping the grout mixture until clean grout flows out the top of the hole. The grout pipe shall be withdrawn during the grouting but the end of the grout pipe shall remain embedded at least 2-feet below the surface of the grout at all times. Borings left open overnight shall be covered to prevent injury to personnel and to minimize the potential for any surface drainage entering the boring. Boreholes and test pits shall be inspected after 3 days to ensure no settlement has occurred. If settlement has occurred, resulting depressions shall have additional grout or backfill added until the boring or test pit matches the surrounding ground surface. Pavement shall be backfilled with tamped asphalt. Any backfilled holes that show evidence of grout shrinkage or settlement shall be re-grouted within 24 hours to bring the top of grout back to the ground surface.

1.5 Records. Boring logs shall be prepared on Eng Form 1836 per the following guidelines unless otherwise noted in the task order.

1.5.1 General Instructions for ENG 1836. The Contractor shall keep accurate driller's logs and records of all work accomplished under this contract. All such records shall be preserved in good condition and order by the Contractor until they are delivered and accepted, and the Contracting Officer shall have the right to examine such records at any time prior to their delivery to him. Separate logs shall be made for each hole. All drill logs shall subscribe to the following requirements:

a. Logs are to be prepared on ENG Form 1836. A black pen should be used.

b. Logs should be as neat and legible as possible, but do not RECOPY logs which become soiled, as only the original is an acceptable legal record. Errors should be lined out, rather than erased.

c. Logs shall be at a scale of 1 inch = 1 foot.

d. Holes should be logged in detail. The logs shall contain all information obtainable from megascopic (eyeball) examination of the samples or core, and the log should explain all exploration and sampling procedures and methodology.

e. Avoid non-standard abbreviations in the descriptive column of the log.

f. Each feature logged shall be described in such a way that other persons will recognized the feature, the depth(s) at which it occurs, it’s thickness or size, it’s shape or appearance, and hardness and plasticity, where appropriate.

g. Horizontal solid lines shall be used in the description column to indicate stratigraphic contacts or changes in materials. Horizontal lines in the remarks may be used to delineate the portion of the boring to which specific remarks apply, e.g., exploration method, changes in fluid color, etc.

h. Every attempt shall be made to obtain samples or core representative of all materials encountered in the boring. Where samples cannot be obtained for the zone in question, the geologist and the driller will use their experience and judgment to establish the type of material.

i. The entire length of hole will be described by reference to actual samples or by experienced evaluation.

j. The depth at which the material is saturated shall be determined whenever possible and the static ground water depth measured and recorded.

k. Each portion of the ENG 1836 header shall be completed as appropriate on each page of the log, including the signature of the inspector.

l. A simple sketch showing the location of the boring shall be drawn in the remarks column at the top of page 1. This diagram should utilize measured distances from known items, e.g., fence line, gravity drain, relief well, etc. See plates 1 and 2 following, for examples of logs.

1.5.2 Specific Instructions for ENG 1836. Unless otherwise specified under the task order, the following components of ENG Form 1836 should be completed as follows:

a. The following header components of ENG 1836 should be completed as follows:

1) Hole No. (top of the page): As assigned.

2) Division: (SAD) South Atlantic Division

3) Installation: Jacksonville District.

4) Sheet ___ of___ sheets (self-explanatory)

5) Block 1. PROJECT: Provide the specific name of the project

6) Block 2. LOCATION: If exact stationing and offset are known, enter here. If exact coordinates are available, enter here. If either stationing or coordinates are not known, enter ‘See Remarks’ and draw a sketch of the location in the remarks column on page 1. It is also useful to make locations on field maps if available. Any changes in location from original plan should also be noted in the remarks column, along with the reason for the change.

7) Block 3. EXPLORATION AGENCY: Enter the name of the District, Government agency or Contract exploration company, whichever is applicable.

8) Block 4. HOLE NO.: As assigned

9) Block 5. NAME OF DRILLER: If more than one, enter all names.

10) Block 6. DIRECTION OF HOLE : Check the appropriate box and provide compass degrees from vertical.

11) Block 7. THICKNESS OF OVERBURDEN: Enter the drilled footage of material above the top of rock, if known. If not known, leave blank.

12) Block 8. DEPTH DRILLED INTO ROCK: Enter the drilled footage of rock, from top of rock to bottom of hole.

13) Block 9. TOTAL DEPTH OF HOLE: Enter the drilled footage from ground surface or ‘0’, to bottom of hole.

14) Block 10. SIZE AND TYPE OF BIT: Show all bits used. If several bits of different type and size are used, enter ‘See Remarks’ and show size and type of bits used, in the remarks column, at the appropriate depths.

15) Block 11: DATUM FOR ELEVATION: Vertical data to be reported in both the MSL tidal datum and the PRVD02 vertical datum, or as directed by Task Order. NGVD 88 (National Geodedic Vertical Datum,MSL (mean sea level) or TBM (total benchmark), which refers to elevations referenced to a point when that point is arbitrarily considered zero elevation.

16) Block 12. MANUFACTURER’S DESIGNATION OF DRILL: Provide the trade name, model and serial number of the drill used. If more than one, indicate and provide remark at appropriate depth.

17) Block 13. TOTAL NUMBER OF OVERBURDEN SAMPLES: the number of disturbed soil samples taken in a boring.

18) Block 14. TOTAL NUMBER OF CORE BOXES: self-explanatory

19) Block 15. ELEVATION OF GROUND WATER: The static water level in the hole, usually after 24 hours.

20) Block 16. DATE HOLE STARTED/COMPLETED: Self-explanatory.

21) Block 17: ELEVATION TOP OF HOLE: For surveyed holes, provide elevation to the nearest tenth. If not surveyed, leave blank.

22) Block 18. TOTAL CORE RECOVERY: To be calculated by the geologist who logs the hole and is reported as a percentage. It is the percentage of rock retrieved from the boring, relative to the total length of rock cored.

23) Block 19. SIGNATURE OF INSPECTOR: A signature and a printed-out name should be placed on each page, by the individual logging the hole.

b. The following footer components of ENG 1836 should be completed as follows:

1) Project and Hole No.: same as used in the heading and top of the page.

b. Specific Drill Data

a. Column a. ELEVATION: For soil borings, when top of hole elevation is known, elevations of top and bottom of each page shall be shown, to the nearest tenth of a foot. For rock borings, elevations for top of rock, stratigraphic contacts and top and bottom of cavities shall be shown to the nearest tenth of a foot. Bottom of hole elevation shall also be shown to the nearest tenth of a foot.

b. Column b. DEPTH: All logs will be written at a vertical scale of l inch equals 1 foot, unless otherwise specified in the request.

c. Column c. LEGEND: For soil borings, enter blow counts for split spoon sampling at appropriate depth intervals in Column c. For rock core holes show cracks, joints, stratigraphic contacts and cavities at appropriate depth in

Column c. For undisturbed sampling, this column shall show the start and end of the proposed Shelby tube sampler. The sample ends shall be cleaned off, and Torvane shear values and/or pocket penetrometer readings shall be taken at each end and record at appropriate depth in Column c.

d. Column d. CLASSIFICATION OF MATERIALS: This column will be used to describe and classify all materials encountered in the boring. Embankment materials, overburden, and in some instances, intensely weathered rock, will be classified and described according to the Unified Classification System.

All materials below top of rock will be classified according to EM 1110-1- 1806. The first word of the description should describe the basic material, i.e.: sand, clayey," and not clayey sand.

(1) Unconsolidated materials shall be described as outlined below and in the following sequence:

(a) descriptive USCS classification in accordance with ASTM D2488;

(b) consistency of cohesive or apparent density of non-cohesive materials;

(c) moisture content assessment, e.g., moist, wet, saturated, etc.;

(d) color;

(e) soil structure

(f) angularity of coarse grain particles

(g) odor

(h) staining

(2) Consolidated materials below top of rock designation shall be described as outlined below and in the following sequence:

(a) Rock type

(b) Weathering; if highly weathered indicate percent rock verses soil

(c) Structure and structure thickness

(d) Color

(e) Grain size

(f) Strength

(g) Fracture spacing

(h) Moisture content assessment

e. Column e: % CORE RECOVERY: When coring, show calculated core recovery for each run in this column. When taking split spoon samples, the column shall show the amount recovered over the amount attempted, e.g., 1.2/1.5. When taking undisturbed samples, the column shall show the amount recovered over the amount attempted, e.g., 1.8/2.5.

f. Column f. BOX OR SAMPLE NUMBER: Record the number of the core boxes and/or samples at appropriate depths in this column. In soils, the following procedures for designating samples shall be followed:

1) A separate sequential number will be assigned to each auger, split spoon drive or undisturbed sample such that sample 1 overlies sample 2 etc. In the event a single sample is saved in more than 1 jar (for size, separate testing consideration, differing classification) each jar from the same sample drive or push shall have the next sequential number.

2) Undisturbed tubes shall be designated as T-1, T-2, etc.

Jar/bagsamples shall be designated as Jar/Bag 1, Jar/Bag 2, etc.

3) A line shall be drawn to graphically represent the recovery portion of the drive or push split spoon samples obtained.

1.5.3 The presence of a Government geologist or other government personnel or the keeping of separate drilling records by the Contracting Officer shall not relieve the Contractor of the responsibility for the work specified in this scope of work. Payment will not be made for any work for which the Contractor has not furnished the required records.

1.6 Care and Delivery of Samples. The Contractor shall be solely responsible for preserving all samples in good condition. The Contractor shall keep samples from freezing and undue exposure to the weather, and shall keep all descriptive labels and designation on sample Jars and boxes clean and legible until final delivery of samples to and acceptance by the Contracting Officer. All samples shall be delivered in accordance with the Task Order, unless otherwise directed by the

COR.

1.6.1 Transporting Samples to CONUS testing facilites. As directed by Task Order, the Contractor may be required to transport samples to CONUS testing facilities. . Undisturbed samples shall be packed upright and on foam cushions handled carefully to minimize disturbance.

PART II – IN SITU TESTING

2.1 Electronic Piezocone Penetrometer Testing. Electronic Piezocone Penetrometer testing shall be performed by methods and procedures consistent with ASTM D 5778, using a standard Electronic Piezocone Penetrometer. Testing shall include all plant, equipment, and personnel necessary to accomplish the work. Test results shall be furnished in a neat and concise format upon completion of the work. The electronic data format shall be approved by the Government prior to performing Piezocone testing.

2.2 Vane Shear Testing. Vane shear testing shall be performed in accordance with ASTM D 2573. Testing may be required using 2-, 3-, or 4-inch vanes, at the option of the Contracting Officer as indicated by task order. Results are to be furnished by the Contractor to the Contracting Officer in a neat and coherent format upon completion of the work.

2.3 Borehole Geophysical Testing. In-situ borehole geophysical logging consisting of spontaneous potential, single point resistance, and natural gamma, shall be performed in each designated boring using methods and procedures consistent with ASTM D 5753, and ASTM D 6274. Borehole geophysical testing shall include all plant, equipment, and personnel necessary to accomplish the work. Geophysical logs for all geophysical logging shall be furnished in a concise and standardized format upon completion of the work. The electronic data format shall be approved by the Government prior to performing geophysical testing.

2.4 Optical Televiewer. Optical televiewer testing shall consist of a Borehole Image Processing system (BIP), which maps 360 degree, continuous and azimuth-oriented borehole wall mapping and quantitative analysis/evaluation of fractures including dip/strike, aperture of fracture, and voids in the bedrock. Testing shall include all plant, equipment, and personnel necessary to accomplish the work. All data collected shall be furnished in a concise and standardized digital format upon completion of the work as indicated under specific task orders.

2.5 Prebored Pressuremeter Services. Prebored Pressuremeter testing shall be performed in accordance with ASTM D 4719. Testing locations and depths shall be determined by the Contracting Officer or as directed by task order. Results are to be furnished by the Contractor to the Contracting Officer in a neat and coherent format upon completion of the work. The electronic data format shall be approved by the Government prior to performing pressuremeter testing.

2.6 Flat-Plate Dilatometer Services. Flat-Plate Dilatometer testing shall be performed in accordance with ASTM D 6635. Testing locations and depths shall be determined by the Contracting Officer or as directed by task order. The Flat-Plate Dilatometer with AWJ connections may be provided by the Government for contractor use. The contractor shall provide compressed nitrogen gas for the dilatometer testing. The contractor shall be responsible for any damage to the Government owned equipment due to negligence or misuse. Results are to be furnished by the Contractor to the Contracting Officer in a neat and coherent format upon completion of the work. The electronic data format shall be approved by the Government prior to performing Dilatometer testing.

PART III- LABORATORY TESTING

3.1 General. The work consists of laboratory testing of soil and rock samples, obtained by the Contractor's drill crew. The Contractor’s OCONUS location laboratory shall conform to the requirements as specified in ASTM D 3740 and ASTM E 329 and shall be validated by the Materials Testing Center (MTC) for the Corps of Engineers upon award of the contract., and shall maintain it’s validation for the duration of the contract. A list of current validated testing laboratories can be viewed at: http://mtc.erdc.dren.mil/searchvalidation.aspx

The requirements for laboratory validation is considered incidental to the sample testing and no separate payment for validation of laboratories will be made. The Contractor shall furnish all equipment, software, supplies, and personnel to complete the testing and reporting of test results of these samples in an efficient and timely manner. The amount of testing required is unspecified.

3.2 Laboratory Testing Facility. The Contractor shall furnish all housing, electric, water, sanitary facilities, and equipment to establish a working lab, including, but not limited to a phone, fax, copier, internet hot spot and computers to run the gINT Geotechnical Software to establish an OCONUS on-site facility for soils testing in accorance with subsections outline below.

3.3 Laboratory Equipment, Software and Supplies. The Contractor shall furnish all instrumentation, equipment, software and supplies necessary to perform the work required at the OCONUS location including but not limited to index testing. Index testing to include but not limited to (Sieve Analysis, Atterberg Limits, #200 wash, Organic Content, Moisture Content, Specific Gravity ). Required geotechnical software for presentation of laboratory test results shall be the most recent version of gINT Geotechnical and Geoenvironmental Software. The required gINT library and project database/template will be provided by the Government.

3.4 Laboratory Personnel and Inspections. Laboratory inspections may be conducted during the contract period. These inspections by the USACEwill include inspection of all laboratory equipment to verify that they conform to the ASTM standards and methods. Any equipment and/or procedure not conforming to the ASTM standards and methods shall not be accepted.

Any deficiencies shall be corrected and a new inspection by the USACE personnel shall verify the corrections, before further testing shall be allowed to resume. The laboratory manager shall have at least five years experience in geotechnical laboratory testing. The geotechnical laboratory technicians shall be able to demonstrate their abilities to perform each test in accordance with the ASTM standards, methods, and calibrations. The Government shall reserve the right to inspect the laboratory at any time.

3.5 General - Testing Assignment. Upon completion of drilling and receipt of a copy of the drill logs, a testing assignment will be issued as indicated by Task Order, and will include the types of analyses to be performed, number of samples, and required completion date.

http://mtc.erdc.dren.mil/searchvalidation.aspx

3.5.1 Delivery and Testing. Samples shall be tested or delivered , as indicated by individual task order..