02_32_00.pdf

Elberon to Loch Arbour Reach Contract 2, NJ ELBERONTOLOCH2

SECTION 02 32 00

SUBSURFACE DRILLING, SAMPLING, AND TESTING

05/10

PART 1 GENERAL

1.1 Mobilization and Demobilization

See Section 01 54 00 MOBILIZATION AND DEMOBILIZATION for details.

1.2 Payment

Payment will be included in the lump sum prices shown on the bid schedule, which shall include cost of materials, equipment, sampling, and testing including all items incidental to executing the subsurface drilling, sampling, and testing, herein.

1.3 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D1586 (2011) Penetration Test and Split-Barrel Sampling of Soils

ASTM D1587 (2008; E 2012; R 2012) Thin-Walled Tube Sampling of Soils for Geotechnical Purposes

ASTM D2113 (2008) Rock Core Drilling and Sampling of Rock for Site Investigation

ASTM D2487 (2011) Soils for Engineering Purposes (Unified Soil Classification System)

ASTM D2488 (2009a) Description and Identification of Soils (Visual-Manual Procedure)

1.4 SYSTEM DESCRIPTION

Provide the data to determine the type, nature, and characteristics of subsurface materials and the extent and conditions of the various materials as they exist to the depths and at the locations specified.

This is to be accomplished by means of drive sample borings.

1.4.1 Drive Sample Borings and Sampling

A drive sample boring is a boring made through unconsolidated or partly consolidated sediments or decomposed rock by means of a mechanically driven sampler. The purpose of these borings is to obtain knowledge of the composition, the thickness, the depth, the sequence, the structure, and the pertinent physical properties of foundation or borrow materials.

Drive sample boring and sampling shall be performed in accordance with ASTM D1587. Standard Penetration Tests (SPT) shall be performed in

SECTION 02 32 00 Page 1 accordance with ASTM D1586.

1.4.2 Undisturbed Sampling

An undisturbed sample is made to obtain soil samples which, when tested, will show properties as close to the in situ (in place) properties as any sample which can be obtained. All undisturbed sampling shall be accomplished in accordance with ASTM D1587.

1.4.3 Core Drilling

Core drilling shall be 2 inch Diameter. Core Drilling of cores shall be performed in accordance with ASTM D2113. The method used shall provide equally good recovery of cores from both hard and soft rocks.

1.4.4 Sequencing and Scheduling

1.4.4.1 Schedule of Drilling, Sampling, and Testing

Prior to starting work, Contractor shall submit Drilling, Sampling, Testing, and Safety Plan . The Plan shall include, but shall not be limited to, the proposed method of drilling and sampling including a description of the equipment and sampling tools that will be used, a listing of any subcontractors to include a description of how the subcontractors will be used and a description of all methods and procedures that will be utilized to insure a safe operation and to protect the environment. This Plan shall also include a boring location plan. The boring location plan will consider the proposed construction, and accessibility. No work shall be performed until the Plan has been approved and no deviation from the approved Plan will be permitted without prior approval by the Contracting Officer.

Following approval of the boring location plan, the Contractor will make all arrangements for the drilling services, including all necessary permits and utility markouts.

The number of borings for each Outfall site are listed in the table below.

In the table, the land and water designations are based upon the existing conditions of the beach profile depicted on the Contract Drawings. Where beach fill will be installed as per Section 31 24 00.00 18 BEACH FILL PLACEMENT, borings are to be approximately every 100 feet along the Outfall trajectories. Borings must be a minimum of 10 feet away from planned pile locations and within 25 feet of the outfall trajectory.

Continuous sampling shall be performed in all borings. Sampling shall be performed to an elevation equal to or greater than 5 feet below the minimum tip elevation of the piles in that area.

Outfall 19 will have 5 borings spaced along the western 400 feet of the outfall trajectory.

Outfall 28 will have 1 boring within 10 feet of the location of the retention basin.

Outfalls 32, 33, and 34 will have a total of 5 borings spaced along the western 400 feet of the outfall trajectory.

Outfall 36B will have a total of 6 borings spaced along 500 feet of the Outfall inland of the beach and an additional 3 borings along the first 350 feet of the outfall trajectory seaward of Station 0+00.

SECTION 02 32 00 Page 2

BORING AT EACH SITE

OUTFALL EXISTING

BEACH

BORING

EXISTING

WATER

BORING

LAND BORINGS WATER

BORINGS

TOTAL

ADDITIONAL

19 DNJ-14-16 DNJ-14-15 1 4 5

28 DNJ-14-12 NA 1 0 1

34,33,32 DNJ-14-10 DNJ-14-09 1 4 5

36B DNJ-14-08 NA 6 3 9

TOTAL 20

1.5 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Drilling Log ; G, AE

SD-03 Product Data

Permits, Certifications, and Licenses Drilling, Sampling, Testing, and Safety Plan ; G, AE

1.6 QUALITY ASSURANCE

Comply with all Federal, State and local laws, regulations and ordinances relating to the performance of this work. Procure all required permits, certifications, and licenses required by Federal, State, and local law for the execution of this work. Submit copies of all permits, certifications, and licenses prior to starting work. This submittal shall also include a statement of the prior experience, in the type of work described in these specifications, of the person or persons designated to perform the work specified herein.

1.7 DELIVERY, STORAGE, AND HANDLING

1.7.1 General

The Contractor is solely responsible for preserving all samples in good condition. Samples shall be kept from freezing and from undue exposure to the weather, and shall keep all descriptive labels and designations on sample jars, tubes, and boxes clean and legible until final delivery of samples to, and acceptance by, the Contracting Officer. Except as otherwise specified, deliver samples to Project Field Office. Samples shall be delivered within the time limits specified for each type of

SECTION 02 32 00 Page 3 investigation or in accordance with schedules prepared by the Contracting Officer.

1.7.2 Undisturbed Samples

Take every precaution to avoid damage to samples as a result of careless handling and undue delay in shipping. Samples shall be shipped in containers approved by the Contracting Officer and shall be of sufficient durability to protect the samples from any damage during shipment. The sample tubes shall be well packed in vermiculite or other equal material approved by the Contracting Officer to protect the samples against vibration. Avoid exposing sealed and crated samples to precipitation, direct sunlight, freezing and temperatures in excess of 100 degrees F .

Samples permitted to freeze, even partially, shall be replaced by the Contractor. In general, no undisturbed samples shall remain on the site of sampling for more than one week before shipment. Samples shall be stored and shipped with the tube in a vertical position in order to prevent consolidation and segregation or change of water content.

1.8 PROJECT/SITE CONDITIONS

1.8.1 Environmental Requirements

In order to prevent and to provide for abatement and control of any environmental pollution arising from Contractor activities in the performance of this contract, the Contractor and its subContractors shall comply with all applicable Federal, State, and local laws, regulations, and ordinances concerning environmental pollution control and abatement.

a. The Contractor is responsible for keeping informed of all updates and changes in all applicable laws, regulations, and ordinances.

b. Do not pollute lakes, ditches, rivers, springs, canals, waterways, groundwaters, or reservoirs with drill fluids, fuels, oils, bitumens, calcium chloride, insecticides, herbicides, or other materials that may be harmful to the environment or a detriment to outdoor recreation.

1.8.2 Field Measurements

The approximate locations of drill holes shall be shown on the boring location plan that will be a part of the Drilling, Sampling, Testing and Safety Plan submittal. The actual locations will be established in the field by the Contracting Officer prior to the start of work. The elevations of the established locations will also be provided by the Contracting Officer prior to the start of work. Provide access to the locations as necessary for the prosecution of the work. Since no separate payment will be made for access construction, include all costs associated with this in the cost of drilling.

PART 2 PRODUCTS

2.1 CONTAINERS

Furnish jars, tubes, and boxes that meet the following requirements. All such containers will become the property of the Government and the cost thereof will be included in the contract price for the applicable item for which payment is provided.

SECTION 02 32 00 Page 4

2.1.1 Sample Jars

Sample jars shall be 1 pint capacity, wide-mouth glass or plastic jars with moisture-tight screw tops.

2.1.2 Shipping Boxes

Boxes for shipping sample jars shall be corrugated cardboard boxes that have the capacity to hold no more than 12 sample jars and the strength to contain and protect the jars and their contents under ordinary handling and environmental conditions.

2.1.3 Tubes and Crates

Undisturbed samples shall be shipped in thin walled Shelby tubes packed in crates.

2.1.4 Core Boxes

Use longitudinally partitioned, hinged top, wooden core boxes constructed of plywood and dressed lumber or other approved materials in general for all rock cores. As many core boxes as may be required shall be used to box all core. Furnish core boxes completely equipped with all necessary partitions, hinges, and a hasp for holding down the cover. Also provide wood spacers made of surfaced lumber (not plywood) and having dimensions that are 1/8 inch less than the inside dimensions of the individual core box troughs and no less than 3/4 inch thick for blocking the core in the boxes and for providing a marking space to identify core runs and pull depths/elevations. The quantities of these blocks that are required are:

ten blocks per core box for 3 inch or smaller core. The box should have the following capacities:

Box Capacities

3-inch or smaller core 3 or 4 rows of core

The maximum length of a core box shall be 4 feet for 3 inch or smaller core and shall be dimensioned so that a box will hold 12 to 16 feet of core.

2.2 LABELS

2.2.1 Sample Jar Labels

A printed or type-written, fade resistant and waterproof label shall be affixed to the outside of each jar and shall contain the following information:

PROJECT (such as Table Rock Dam) LOCATION (such as Borrow Area B)

HOLE NO. STATION

JAR NO. of _____ JARS

SECTION 02 32 00 Page 5

TOP ELEVATION

OF HOLE

DEPTH OF

SAMPLE

DESCRIPTION OF

MATERIAL

(such as moist, silty, medium sand)

2.2.2 Shipping Box Labels

Each box of jar samples shall be identified with weatherproof and wear-proof labels indicating the following:

PROJECT

LOCATION

JAR SAMPLES FROM HOLE OR HOLES

2.2.3 Core Box Labels

Core boxes shall be identified with stenciled labels. The information on this label shall contain the following:

PROJECT

HOLE NO.

BOX NO.

TOTAL NUMBER OF BOXES FOR THE HOLE

2.3 EQUIPMENT AND SUPPLIES

2.3.1 Drive Sample Boring and Sampling

Furnish equipment for making drive sample borings including, but not limited to, standard 2-inch OD split barrel drive samplers and power-driven drilling machinery of a type or types approved by the Contracting Officer, complete with a drive-hammer of 140-pound weight and all other accessories for taking samples of all types of soils or decomposed rock at the locations and to the depths indicated in the schedule in paragraph SCHEDULE OF DRILLING, SAMPLING, AND TESTING. The drive shoe for the split barrel samplers shall be of hardened steel and shall be replaced or repaired when it becomes dented or distorted.

Supplies shall include, but not be limited to, all casing, drill stem, drill bits, drill fluid and additives, pumps, and power necessary to accomplish the required boring and sampling.

2.3.2 Undisturbed Sampling

Furnish equipment for making undisturbed sample borings including, but not limited to, power-driven drilling machinery of an approved type or types complete with the special devices and accessories enumerated and described hereinafter. Drilling machinery shall be of the hydraulic feed type.

Supplies shall include, but not be limited to, all samplers, casing, drill stem, drill bits, drill fluid and additives, pumps, and power necessary to accomplish the required boring and sampling. Drill casing, if used, shall be of such minimum inside diameter as to allow use of the selected sampler.

SECTION 02 32 00 Page 6

2.3.2.1 Sands and Cohesive Soils

The sampling device used to sample fine to medium grain sands and cohesive soils shall be a fixed or stationary piston type that uses a 3-inch diameter thin wall Shelby tube. Subject to the approval of the Contracting Officer, floating or free piston and non-piston type samplers may be used provided adequate means, such as check valve or vacuum system, are provided to prevent loss of samples.

2.3.2.2 Stiff and Dense Soils

The sampling device for obtaining samples of stiff and dense soils shall be similar or equal to a Denison double tube, swivel head core barrel, or a Pitcher sampler and must be approved by the Contracting Officer prior to use.

2.3.3 Core Drilling

Core drilling shall be 2 inch Diameter Core. Furnish equipment for core drilling including core-drilling machinery of a type or types approved by the Contracting Officer, complete with all the accessories needed to take continuous rock cores of a diameter consistent with bit size to the depths specified. Use, as a minimum, a standard ball-bearing, swivel-head, double-tube core barrel, or equivalent. The capacity of the core barrel shall not exceed 10.5 feet of core. Supplies for core drilling shall include, but not be limited to, all casing, drill rods, core barrels, coring bits, piping, pumps, water, tools, and power required for drilling and all boxes and containers required for core samples. Selection of the type of bit shall be at the Contractor's discretion provided that the selected bit produces high quality rock core (see paragraph SUPPLEMENTAL

BORINGS).

PART 3 EXECUTION

3.1 MOBILIZATION AND DEMOBILIZATION

See Section 01 54 00 MOBILIZATION AND DEMOBILIZATION for details.

3.2 IDENTIFYING SAMPLES

Sample jars, shipping boxes, and labels shall comply with PART 2, paragraphs SAMPLE JARS, SHIPPING BOXES, and LABELS, respectively. In addition, a moisture proof label containing the project name, hole number and sample number shall be placed inside the jar or this information can be written using a waterproof pen or scribed on the jar lid. Take all precautions required to insure that the shipping boxes are not subjected to rough handling or damaging environmental conditions.

3.3 DRIVE SAMPLE BORING AND SAMPLING

Samples shall be labeled in accordance with paragraph IDENTIFYING SAMPLES. Drive sample borings drilled through overburden materials shall be suitably cased to permit obtaining drive samples of the size or sizes specified or as directed. Samples shall be taken either continuously or at maximum vertical intervals of 5 feet or at a change in materials in accordance with the paragraph SCHEDULE OF DRILLING, SAMPLING, AND TESTING or as otherwise referenced in the Drilling, Sampling, Testing, and Safety Plan. The sampler shall be driven with the force of the 140 pound drive

SECTION 02 32 00 Page 7 hammer under a free fall of 30 inches . A 300 pound hammer may be used upon refusal to advance the sample if it is determined that the refusal is due to cobbles or boulders. To minimize the compacting effect of casing driving when casing is used to stabilize a boring, the bottom of the casing shall be kept as high above the soil sampling zone as conditions permit. Above the water table, samples shall be obtained from a dry hole. Below the water table, water shall be maintained within the hole at or above the groundwater level. Where information on the natural water content of soils above the water table is not needed and when approved by the Contacting Officer, boreholes may be drilled without casing by using a suitable drilling fluid to prevent collapse of sidewalls. When a drilling fluid is used, soil sampling shall be done by such means that will prevent inclusion of drilling fluid in the samples. The samples shall be placed in sample jars as soon as possible after they are taken from the hole and, when possible, the volume of the sample shall be large enough to completely fill the sample jar in order that the natural moisture content of the material may be retained to the fullest extent possible. All samples shall be labeled. No sample shall remain at the site of boring for more than one week after being taken from the hole.

3.4 UNDISTURBED SAMPLING

In general, labeling of undisturbed samples shall conform to paragraph IDENTIFYING SAMPLES. Particular care shall be taken to indicate the top and bottom of each sample tube. Tubes and crates for undisturbed samples shall be labeled "DO NOT JAR OR VIBRATE" and "HANDLE, HAUL, AND SHIP IN A

VERTICAL POSITION".

3.4.1 Procedure

The procedure for Undisturbed Sampling shall be the same as outlined in paragraph DRIVE SAMPLE BORING AND SAMPLING, except that the sampling device shall be advanced downward by one continuous, smooth drive using the drill rig's hydraulic feed system. The hydraulic down pressure shall be read and recorded at 6 inch intervals during each sample drive. The sampling device for stiff and dense soils shall be advanced by continuous rotation of the outer cutting barrel in conjunction with use of drill fluid circulation. Driving of any undisturbed sampling device by means such as a drop hammer will not be permitted.

3.4.2 Sealing

3.4.2.1 Alternate 1

The soil sample obtained in a thin wall Shelby tube shall be retained in the tube and sealed on both ends with a mechanically expandable O-ring sealing disk of the appropriate size.

3.4.2.2 Alternate 2

The soil sample obtained in a thin wall Shelby tube shall be extruded from the tube in the field as soon as the tube is removed from the boring by a method approved by the Contracting Officer. The extruded soil sample shall immediately be wrapped in thin plastic wrap and placed in the center of a plastic tube that has a diameter of at least 1 inch larger than the diameter of the soil sample, is at least 1-inch longer than the length of the soil sample, and has at least 1/2-inch of congealed 50/50 mixture of paraffin and microcrystalline wax in the bottom. The annular space between the soil sample and the tube shall be filled with a 50/50 mixture

SECTION 02 32 00 Page 8 of paraffin and microcrystalline wax to a distance of at least 1/2-inch above the top of the soil sample.

3.4.2.3 Alternate 3

Both ends of the soil sample tube/liner obtained with a Denison barrel, or its equivalent, shall be cleaned out to remove all drill fluid contaminated and/or disturbed soil or to a minimum distance of 2 inches from the ends of the tube/liner. Any material removed that is not contaminated with drill fluid shall be placed in a sample jar and labeled in accordance with paragraph IDENTIFYING SAMPLES. The cleaned out ends of the sample liner tube shall then be sealed with a 50/50 mixture of paraffin and microcrystalline wax. A metal or wooden disk, having a diameter just slightly smaller than the inside diameter of the liner tube shall be inserted into the wax to a distance of 1/4-inch from the end of the soil sample. The wax plugs shall be flush with the ends of the tube and a final seal consisting of a metal cap or tape shall be placed over the ends of the tube.

3.5 CORE DRILLING

Core drilling as required to advance a boring through boulders, cobbles, or lithified silt and clay layers shall be 2 inch diameter Core.

3.5.1 Procedure

All holes shall be drilled vertically to the bottom elevations or depths specified unless indicated in the schedule of borings or directed to be drilled otherwise. Off-setting of borings from the locations specified in the Plan of Borings or as shown on the drawings, will not be permitted without prior approval. Casing through the overburden may be required.

This casing shall be sealed in the rock at the elevation where rock is encountered prior to commencement of rock coring. Operate the drills at required speeds and down pressures to control drill fluid pressures and quantities to insure maximum core quality and recovery in whatever kind of rock is encountered. Where soft or broken rock is encountered, reduce the length of runs to 5 feet or less in order to reduce and/or keep core loss and core disturbance to the minimum. Failure to comply with the foregoing procedures will constitute justification for the Contracting Officer to require redrilling, at the Contractor's expense, of any boring from which the core recovery is unsatisfactory. Exercise particular care in recording zones of water loss, cavities, rod jerks, rough drilling and other unusual and non-ordinary coring experiences that, supplementing the core record, will throw light on the nature and the extent of any fracturing or abnormalities.

3.5.2 Arrangement of Core

Core boxes shall comply with PART 2, paragraph CORE BOXES. All cores shall be arranged neatly in the partitioned boxes in the same sequence in which they occurred before removal from the hole. Facing the open box with the hinged cover above and the open box below, cores shall be arranged in descending sequence beginning at the left end of the trough nearest the hinges and continuing in the other troughs from left to right. The highest part of the core shall be placed in box 1, and the lower portions of the core shall be placed in the other boxes in consecutive order.

SECTION 02 32 00 Page 9

3.5.3 Labeling, Marking and Packing Core

Stenciled labels for core boxes complying with paragraph CORE BOX LABELS shall be placed on the inside and outside of the top cover in addition to each end. In addition, the depths (or elevations) of each core run/pull shall be marked with a black waterproof pen on the spacer blocks that are placed between core pulls. When a box is full, the space between the core and the trough sides shall be filled with finely ground vermiculite or other packing material approved by the Contracting Officer.

3.5.4 Disposition of Core

While onsite, protect the filled core boxes from direct sunlight, precipitation, and freezing by some form of Contracting Officer approved shelter that allows ventilation to the boxes. Upon completion of core drilling and sampling operations, core boxes containing cores shall be stored in an area provided by the Contracting Officer near the site of drilling.

3.6 SUPPLEMENTAL BORINGS

Borings that are abandoned or from which unsatisfactory samples or cores are obtained will be supplemented by other borings adjacent to the original in order that satisfactory samples or the required information will be obtained. Actual locations of any supplemental borings will be established by the Contracting Officer. Penetration to the depth where the original was abandoned or to the depths where unsatisfactory samples were obtained may be made by any method selected by the Contractor that in the opinion of the Contracting Officer will permit satisfactory completion and sampling below the elevation where the last satisfactory sample was obtained in the abandoned or satisfactory sampling in the reaches where satisfactory samples were not obtained in the original borings. No payment will be made for supplemental borings that are required to be drilled to replace borings that were abandoned or from which satisfactory samples were not obtained because of mechanical failure of drilling and sampling equipment, negligence on the part of the Contractor, or other preventable cause for which the Contractor is responsible except that payment will be made for acceptable portions of these supplementary borings below the depths or outside the reaches for which payment was made for the original borings pits.

3.7 BACKFILLING

3.7.1 Drill Holes

Unless otherwise noted in these specifications or directed by the Contracting Officer, all drill holes shall be backfilled and abandoned in accordance with all Federal, State, and local laws, regulations and ordinances. Preserve all holes in good condition until final measurement and until the records and samples have been accepted. As a minimum, all holes shall be grouted from the bottom of the hole to within 2 feet of the ground surface using a grout mixture of 6 to 8 gallons of water per sack (94 pounds) of portland cement. All grout shall be pumped through a tremie pipe that is inserted to the bottom of the boring to insure that the grout fills the full extent of the hole. The remaining ungrouted top 2 feet of the hole shall be backfilled with local soil and tamped. All backfilling operations shall be performed in the presence of the Contracting Officer and, if required by regulation, Federal, State, and local officials. No separate payment will be made for backfilling drill

SECTION 02 32 00 Page 10 holes. The cost of this work shall be included in the drilling costs.

3.8 RECORDS

Submit complete, legible copies of DRILLING LOG , ENG FORM 1836 and 1836A, and records to the Contracting Officer upon completion of the work or at such other time or times as directed. Keep accurate driller's logs (DRILLING LOG, ENG FORM 1836, and 1836-A will be provided by the Contacting Officer) and records of all work accomplished under this contract and deliver complete, legible copies of these logs and records to the Contracting Officer upon completion of the work or at such other time or times as directed. All such records shall be recorded during the actual performance of the work and shall be preserved in good condition and order until they are delivered and accepted. The Contracting Officer has the right to examine and review all such records at any time prior to their delivery and has the right to request changes to the record keeping procedure. The following information shall be included on the logs or in the records for each hole:

a. Hole number or designation and elevation of top of hole.

b. Driller's name and Geologist's name.

c. Make, size, and manufacturer's model designation of drilling and sampling equipment.

d. Type of drilling and sampling operation by depth.

e. Hole diameter.

f. Dates and time by depths when drilling, and sampling operations were performed.

g. Time required for drilling each run.

h. Drill action, rotation speed, hydraulic pressure, water pressure, tool drops, and any other unusual and non-ordinary experience which could indicate the subsurface conditions encountered.

i. Depths at which samples or cores were recovered or attempts made to sample or core including top and bottom depth of each run.

j. Classification or description by depths of the materials sampled, cored, or penetrated using the Unified Soil Classification System ( ASTM D2487) and including a description of moisture conditions, consistency and other appropriate descriptive information described in paragraph SUPPLEMENTAL BORINGS of ASTM D2488. This classification or description shall be made immediately after the samples or cores are retrieved.

k. Classification and description by depths of rock materials sampled or cored including rock type, composition, texture, presence and orientation of bedding, floiation, or fractures, presence of vugs or other interstices, and the RQD for each cored interval.

l. Indication of penetration resistance such as drive-hammer blows given in blows per foot for driving sample spoons and casing and the pressure in psi applied to push thin-wall or piston-type samplers.

SECTION 02 32 00 Page 11

m. Weight of drive hammer.

n. Percentage of sample or core recovered per run.

o. Depth at which groundwater is encountered initially and when stabilized.

p. Depths at which drill water is lost and regained and amounts.

q. Depths at which the color of the drill water return changes.

r. Type and weight of drill fluid.

s. Depth of bottom of hole.

t. Pressures employed in pressure testing.

TABLE 1 - COMMON CORE DIAMETERS

CORE DIAMETER INCHES HOLE DIAMETER

INCHES

Conventional Core Barrels

AWG 1.185 1.890

BWG 1.655 2.360

NWG 2.155 2.980

HWG 3.000 3.907

Wireline Core Barrels*

A 1.064 1.890

B 1.432 2.360

N 1.875 2.980

H 2.450 3.716

3.345 4.827

Large Diameter Series

2-3/4" X 3-7/8" 2.690 3.875

4" X 5-1/2" 3.970 5.495

6" X 7-3/4" 5.970 7.750

* No Industry Standard for Wireline Sizes. Diameters shown for wireline core barrels are nominal and vary between manufacturers.

-- End of Section --

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