Technical Exhibit F Div 02 Existing Conditions.pdf

SUBSURFACE DRILLING, SAMPLING AND TESTING 023213 - 1

SECTION 023213 – SUBSURFACE DRILLING, SAMPLING AND TESTING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SYSTEM DESCRIPTION

A. 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 auger borings, drive sample borings, undisturbed sample borings, core drilling, pressure testing and/or test pits.

1. Auger Borings and Sampling

An auger boring is any boring made in unconsolidated soils with a conventional manually or power-driven earth auger for the purpose of obtaining samples of subsurface materials.

Auger boring and sampling shall be performed as directed by the Owner’s

Representative.

2. 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, thickness, depth, sequence, structure and the pertinent physical properties of the foundation or borrow materials.

Drive sample boring and sampling shall be performed as directed by the Owner’s

Representative. Standard Penetration Tests (SPT) shall be performed in accordance with

ASTM D1586.

3. Undisturbed Sample Borings and Sampling

An undisturbed sample boring is a boring 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 as directed by the Owner’s

Representative.

4. Core Drilling

Core drilling of cores shall be by any approved standard and accepted method of rotary rock core drilling that will provide continuous and complete rock cores of the required diameter from any subsurface interval of bedrock specified for investigation. The method used shall provide equally good recovery of cores from both hard and soft rocks.

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5. Pressure Testing (Hydraulic)

Hydraulic pressure testing is the process of forcing water under pressure into subsurface rock formations through pre-drilled holes for the purpose of determining the subsurface leakage conditions and possible grouting requirements.

6. Test Pit Excavation and Sampling

A test pit is any excavation in soil, hardpan, decomposed rock, or other unconsolidated or partially consolidated overburden materials which has an open cross-sectional area large enough to permit efficient excavation and shoring/lining, engineering and geological inspection and photographing of the subsurface soils and manual undisturbed sampling from within the test pit. All test pits shall be excavated, dewatered (if necessary), shored/lined and protected from surface water drainage in accordance with all applicable

Federal, State, local and OSHA safety regulations.

7. Sequence and Scheduling: Schedule of Drilling, Sampling and Testing

Prior to starting work, submit a plan for drilling, sampling, testing and safety. 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. No work shall be performed until this plan has been approved and no deviation from the approved plan will be permitted without prior approval by the Owner’s Representative. The schedule of Drilling, Sampling and Testing is shown on the drawings.

8. Order of Work

a. The order in which the Work is to be accomplished will be determined in the field by the Owner’s Representative.

b. Provide a qualified, licensed Geologist experienced in subsurface exploration for each drill unit to oversee all drilling, sampling, and field testing operations. This individual shall be responsible for the preparation of a separate log and/or report for each boring, pressure test or test pit. This individual shall also be responsible for the preparation of all soil and rock samples for delivery to the designated point.

c. The presence of the Owner’s Representative or the keeping of separate drilling records by the Owner’s Representative shall not relieve the Contractor of the responsibility for the work specified in this Specification.

1.3 SUBMITTALS

A. Shop Drawings

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Drilling Log

Product Data

Permits, Certifications and Licenses

Schedule of Drilling, Sampling and Testing

1.4 QUALITY ASSURANCE

A. 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 the 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.

1.5 DELIVERY, STORAGE AND HANDLING

A. General

1. 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 the samples to the specified location. Samples shall be delivered within the time limits specified for each type of investigation.

B. Undisturbed Samples

1. 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 of sufficient durability to protect the samples from any damage during shipment. The samples 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 horizontal position in order to prevent consolidation and segregation or change of water content.

1.6 PROJECT SITE AND CONDITIONS

A. Environmental Requirements

1. 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

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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.

2. Field Measurements

a. The approximate locations of drill holes and/or test pits are shown on the drawings.

The actual locations will be established in the field by the Owner’s Representative prior to the start of the Work. The elevations of the established locations will also be provided by the Owner’s Representative prior to the start of the Work. The

Contractor will provide access to the locations as necessary for the prosecution of the

Work. Since no separate payment will be made for access construction, all costs associated with this shall be included in the cost of drilling and/or excavating.

PART 2 - PRODUCTS

2.1 CONTAINERS

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

1. Sample Jars: Shall be 1 pint or 1 quart capacity, wide-mouth over 2-1/4 inches in diameter, glass or plastic jars with moisture-tight screw tops as specified.

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

3. Tubes and Crates: Undisturbed samples shall be shipped in thin walled Shelby

Tubes packed in crates.

4. Core Boxes: Use longitudinally partitioned, hinged top, wooden core boxes constructed of plywood and dressed lumber or other approved materials 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, five blocks per core box for 4 inch and PQ core, and three blocks per core box for 6 inch core. The box should have the following capacities:

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6 inch core single row of core

4 inch or PQ core 2 rows of core

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. The maximum length of a core box for core that is larger than 3 inches shall be 5 feet.

2.2 LABELS

A. Sample Jar Labels

1. A printed or typewritten, fade resistant and waterproof label shall be affixed to the outside of each jar.

2. Shipping Box Labels: Each box of jar samples shall be identified with weatherproof and wear-proof labels.

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

Project Name

Hole No.

Box No.

Total Number of Boxes for this Hole.

2.3 EQUIPMENT AND SUPPLIES

A. Auger Boring and Sampling

Furnish the equipment for making auger borings including, but not limited to, standard continuous flight augers and/or standard cup-type earth augers, similar or equal to the Iwan

Auger and not less than 4 inches in diameter unless other approved. The augers shall be completely equipped with all the accessories necessary for boring and sampling of overburden materials to the depths and diameters specified or shown on the drawings.

B. 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 complete with a drive-hammer of standard 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 OF

DRILLING, SAMPLING AND TESTING shown on the Drawings. 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.

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C. Undisturbed Sample Boring and 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.

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 or 5 inch diameter thin wall Shelby tube.

2. Stiff and Dense Soils: The sampling device for obtaining samples of still and dense soils shall be similar or equal to a Denison double tube, swivel head core barrel, or a Pitcher sampler.

D. Core Drilling

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.

E. Pressure Testing (Hydraulic)

Furnish pressure testing equipment including, but not limited to, the following: water pump with a minimum capacity of 50 gpm that is capable of delivering a constant discharge pressure as specified kPa psi double expander packers with rubber expansion elements set 3 and 5 feet apart with piping so arranged that water may be admitted either below the bottom packer element or between the two packer elements, a pressure relief valve, a pressure gage capable of measuring water pressures to the nearest 1 psi and water meter capable of measuring flows to the nearest 1 gpm. Supplies shall include, but not be limited to, all accessory valves, gages, surge tanks, stopcocks, plugs, expanders, potable water for testing, standby pumps, fuels, pipes, pressure hose, and tools necessary for maintaining uninterrupted tests for each boring to be tested. The pressure test equipment shall be configured so that the pressure gage is located at the top of the hole, a bypass water line and valve are located between the pump and the gage, a flow meter is located between the bypass the pressure gate, and a valve is located in the line between the flow meter and the pressure gage. All equipment and supplies used for pressure testing shall be approved by the Contracting Officer prior to use.

F. Test Pit Excavation and Sampling

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Selection of the test pit excavation, shoring/lining and dewatering (if necessary) methods and equipment shall be at the Contractor’s discretion but must be approved by the Owner’s

Representative. When the number of test pits to be excavated is large, and when adaptable mechanical trenching equipment is available, the Owner’s Representative may require that such mechanical excavating equipment be used to expedite completion of the pits. Supplies for obtaining undisturbed samples shall include, but not be limited to, split metal cylinders and/or metal or wooden boxes of acceptable sizes and types. The wooden boxes shall be cubic in shape. Accessories shall include, but not be limited to, a small sample trimming shovel or spade, hatchet, trimming knife, wax and facilities for melting and brushing same, trowels, labels, and boxes for shipping samples. Also furnish all materials required for shoring/lining to comply with all applicable safety regulations.

PART 3 - EXECUTION

3.1 MOBILIZATION AND DEMOBILIZATION

A. Mobilization

Mobilization consists of the delivery to the site of all plant, equipment, materials and supplies to be furnished by the Contractor, the complete assembly in satisfactory working order of all such plan and equipment at the job site and the satisfactory storage at the site of all such materials and supplies.

B. Demobilization

Demobilization consists of the removal from the site of all plant, equipment, materials and supplies after completion of the Work and also includes, at the direction of the Contracting officer, the cleanup and removal of all scrap, waste backfill material, waste drilling fluid, soil contaminated with engine/hydraulic oil, backfilling all sumps or excavations resulting from the operations and, in general, returning the site as close to its original condition as possible.

3.2 IDENTIFYING SAMLES

A. 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, and complies with the Paragraph CARE AND DELIVERY

OF SAMPLES. A copy of the boring log for the portion of the boring that the samples came from shall be enclosed in the shipping box.

3.3 AUGER BORING AND SAMPLING

A. Samples shall be labeled in accordance with the Paragraph IDENTIFYING SAMPLES.

Samples shall be obtained for each change of overburden material and at maximum vertical

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intervals as shown on the Drawings. In order to retain the natural moisture content of the material to the fullest extent possible, all samples shall be placed in the sample jars as soon as possible after they are taken from the hole. All sample jars shall be labeled. In general, no sample shall remain on the site of the boring for more than one week after being taken from the boring and placed in the jar.

3.4 DRIVE SAMPLE BORING AND SAMPLING

A. Samples shall be labeled in accordance with the 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 as shown on the Drawings. The sampler shall be driven with the force of the 140 pound drive hammer under a free fall of 30 inches. 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. If hollow stem auger is used as a casing and/or to advance the boring, a plug assembly must be used to keep soil from entering the inside of the auger. Above the water table, samples shall be obtained form a dry hole. Below the water table, water shall be maintained within the hold 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 Contracting 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.

3.5 UNDISTURBED SAMPLE BORINGS AND SAMPLING

A. 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 HORIZONTAL OR VERTICAL POSITION”.

1. Procedure

The procedure for Undisturbed Sample Boring and 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.

2. Alternate 1

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The soil sample obtained in a think 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.

3.6 CORE HOLE OVERBURDEN DRILLING

A. Where samples of overburden materials are required in connection with core drilling, the soil overburden shall be drilled and sampled in accordance with the applicable provisions for the type of samples required. Where sampling of the overburden materials is not required, the

Contractor may utilize any method and equipment for drilling and, if required, casing through the overburden that will not affect the quality of the core drilling from the rock surface downward in accordance with these Specifications.

3.7 CORE DRILLING

A. Procedure

All holes shall be drilled vertically or as indicated in the SCHEDULE OF DRILLING, SAMPLING AND TESTING shown on the Drawings 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 or 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.

B. 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 other boxes in consecutive order.

C. Preservation of Core

Representative samples of core shall be wrapped in thin plastic wrap, and then sealed by applying paraffin wax to the outside of the wrapping material prior to placing the core in the

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core box. This sealing process shall be accomplished as soon as possible after the core is removed from the core barrel. The minimum length of core that is preserved from each boring shall be no less than 2.5 times the core diameter. Spacer blocks shall be marked and placed in the core box to show where samples have been removed.

D. 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.

E. 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, shipped or delivered to specified location.

3.8 PRESSURE TESTING (HYDRAULIC)

A. Pressure test each hole in 10 foot sections commencing at the top of bedrock and progressing downward to the bottom of the hole or to such depths as determined by the Contracting Officer below which testing of the hole is not necessary. Pressure test the bottom 10 foot section of hole immediately after it is cored. After a 10 foot section is cored, the coring equipment will be removed from the section and a single rubber expansion packer placed at the top of the section

(bottom of the previously tested section) and the section pressure tested. After the pressure test is completed, the packer assembly shall be removed and the next section cored and then pressure tested. This procedure shall be continued to the bottom of the hole or to depths determined by the Owner’s Representative. Where core data from the test holes indicate only isolated zones that are open or fractured, pressure testing may be limited by the Contracting

Officer to these zones only. Water pressure employed for each lift shall be determined in the field by the Contracting Officer and shall not exceed one pound per square inch per foot of depth to the upper expander and, in no case, shall the pressure be greater than the indicated pressure. The pressure test will be divided into two phases; the first phase will be a flow test which shall then be followed by the second phase which is a duration test. In performing the first phase, water is pumped slowly at first, and the flow then gradually increased to the point where the predetermined maximum pressure is maintained, by adjusting the valve on the bypass line. The allowable pressure shall be held for one minute before any readings are taken. The volume of flow into the test section shall be measured for a period of 5 minutes during which time the pressure shall not vary by more than 5 psi. After this 5 minute test, the second phase shall be started by closing the valve located between the flow meter and the pressure gage. The drop in pressure is then read for a period of 5 minutes at 15 second intervals. In some situations, such as in a very tight formation, the Contracting Officer may eliminate phase one of the test. The Contractor may be required to make check tests at its own expense if the testing

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equipment or its assembly and arrangement are found to be faulty during or after the testing of any holes. Record all gage and meter readings made during a pressure test on a suitable form approved by the Contracting Officer.

3.9 TEST PIT EXCAVA TION AND SAMPLING

A. Excavation

The test pits shall be excavated in the order scheduled in the SCHEDULE OF DRILLING, SAMPLING AND TESTING shown on the Drawings and shall be excavated to depths and dimensions indicated on the drawings. Become thoroughly familiar with the work site and with all available subsurface data, particularly groundwater conditions, before excavating pits.

Regardless of the method of excavation employed, the pits shall be excavated, dewatered and shored/lined in conformation with all applicable safety regulations.

B. Sampling

Obtain soil samples from each test pit at depths determined by the Owner’s Representative. In obtaining samples from test pits, the undisturbed in situ (in place) natural physical and structural characteristics of the samples materials shall be preserved insofar as possible both while samples are being taken and during shipment to the point of testing. In cohesive and partially cohesive soils this may be accomplished by isolating the soil column or cube to be samples by gently trenching around it and knife-trimming it to the required dimensions of the split cylinder or box. A thin coating of melted (50/50 mixture of paraffin and microcrystalline or microcrystalline) wax shall then be applied quickly but gently to the sample with a paint brush to seal it against loss of moisture. The metal or wooden sample container, with the top and bottom removed shall then be placed over the wax coated sample such that the sample is centered within the container and the top of the container sides are at least 1 inch above the top of the sample. The spaces between the sample and the side walls of the container shall then be filled with melted wax. After this wax has congealed, it shall be trimmed so that when the top of the sample container is installed there is no void between the container top and the wax. After the container top is installed, the soil column or cube shall then be cut off approximately 4 inches below the container, the sample and container inverted and removed from the pit and the sample trimmed at the base so that the bottom of the sample is at least 1 inch below the bottom of the container. This space shall be filled with wax and, after the wax has congealed, it shall be trimmed so that when the bottom of the container is installed, there shall be no void between the wax and the bottom of the container. Where overburden materials to be sampled are only partially cohesive, it is best not to expose the entire soil column before waxing. By exposing and waxing mall sections at a time, the sample will be subjected to less disturbance. Where natural moisture content is an important factor, delay shall be avoided in taking the sample in order that the natural moisture content of the material may be retained to the fullest extent.

C. Disposition of Samples

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Samples shall be packed in vermiculite or a packing material approved by the Contracting

Officer and shipped in sturdy wooden boxes of strength and construction sufficient to guarantee against damage during shipment. Boxes should be no larger than is required for shipping two such samples. All sample boxes shall be marked FRAGILE-HANDLE WITH CARE and shall be identified by labels, similar to those as specified in Paragraph IDENTIFYING SAMPLES, attached to the outside of each box. Extreme care shall be taken to indicate the top and bottom of each sample. Avoid exposing sealed and crated samples to precipitation and extremes of temperature. Undisturbed samples permitted to freeze, even partially, shall be replaced by the

Contractor at its own expense. Do not hold these samples at the site for a period in excess of one week. Prior to shipment each sealed and boxed sample shall be checked for correct labeling.

3.10 BACKFILLING

A. Drill Holes

Unless otherwise noted in these Specifications, all drill holes shall be backfilled and abandoned in accordance with 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 six to eight 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 holes. The cost of this work shall be included in the drilling costs.

B. Test Pits

Backfill all test pits with local soil compacted to original densities. No separate payment will be made for backfilling test pits. The cost of this work shall be included in the test pit excavation costs.

3.11 RECORDS

A. Submit complete, legible co pies 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 within fourteen days after a hole or test pit is completed. Keep accurate driller’s logs and records of all work accomplished under this contract and deliver complete legible copies of these logs and records to the Owner’s Representative 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 Owner’s Representative 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 and test pit:

1. Hole or Test Pit number or designation and elevation of top of hole or test pit

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2. Driller’s name and Geologist’s name

3. Make, size and manufacturer’s model designation of drilling, sampling, pressure testing and test pit excavating equipment.

4. Type of drilling, sampling and pressure testing operation by depth.

5. Hole diameter.

6. Dates and times by depths when test pit excavation, drilling, sampling and

Pressure testing operations were performed.

7. Time required for drilling each run and pressure testing each interval tested.

8. 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.

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

10. Classification or description by depths of the materials samples, cored or penetrated using the Unified Soil Classification System and including a description of moisture conditions, consistency and other appropriate descriptive information described in Paragraph

SUPPLEMENTAL BORINGS AND PITS of ASTM D2488. This classification or description shall be made immediately after the samples or cores are retrieved.

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

12. 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.

13. Force weight of drive hammer.

14. Percentage of sample or core recovered per run.

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

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

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

18. Type and weight of drill fluid.

19. Depth of bottom of hole.

20. Pressures employed in pressure testing.

END OF SECTION 023213

SITE DEMOLITION 024113 - 1

SECTION 024113 – SITE DEMOLITION

1.1 SUMMARY

A. Section Includes:

1. Demolishing and removing existing pavements, structures, equipment and materials only to the extent as indicated on the Plans.

2. Removing concrete paving, asphaltic concrete pavement, and base courses.

3. Removing concrete curbs, concrete curb and gutters, sidewalks and driveways.

4. Removing pipe culverts and sewers.

5. Removing miscellaneous structures of wood, plastic, metals, concrete, masonry, or combination of concrete and masonry, etc.

6. Disposing of demolished materials and equipment.

1.2 SUBMITTALS

A. Submit proposed methods, equipment, materials and sequence of operations for demolition.

Describe coordination for shutting off, capping, and removing temporary utilities. Plan operations to minimize temporary disruption of utilities to existing facilities or adjacent property.

B. Submit proposed demolition and removal schedule for approval. Notify Engineer in writing at least 48 hours before starting demolition.

C. Submit an approved copy of demolition schedule to Engineer prior to commencement of demolition operations.

D. Obtain a permit for building demolition, as required.

1.3 PROTECTION OF PEOPLE AND PROPERTY

A. Contractor shall conduct all construction operations under this Contract in conformance with the practices described in the General Requirements.

B. The Contractor shall be responsible for safety and integrity of adjacent structures and shall be liable for any damage due to movement or settlement. Provide proper framing and shoring necessary for support. Cease operations if an adjacent structure appears to be endangered.

Resume demolition only after proper protective measures have been taken.

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1.4 OWNERSHIP OF MATERIAL AND EQUIPMENT

A. Protect items designated for reuse or salvage from damage during demolition, handling and storage. Restore damaged items to satisfactory condition.

B. Materials and equipment not designated for reuse or salvage become the property of the

Contractor.

1.5 STORAGE AND HANDLING

A. Store and protect materials and equipment designated for reuse until time of installation.

B. Deliver and unload items to be salvaged to storage areas indicated on Plans.

C. Remove equipment and materials not designated for reuse or salvage and all waste and debris resulting from demolition from site. Remove material as work progresses to avoid clutter.

2.1 EQUIPMENT AND MATERIALS FOR DEMOLITION

A. Use equipment and materials approved as prescribed in this Section 1.2 Submittals.

B. Use of a “drop hammer” must have the Engineer’s prior approval.

3.1 EXAMINATION

A. Prior to demolition, make an inspection with the Engineer to determine the condition of existing structures and features adjacent to items designated for demolition.

B. Engineer will mark or list existing equipment to remain the property of the Owner.

C. Do not proceed with demolition or removal operations until after the joint inspection and subsequent authorization by Engineer.

D. Stop demolition and notify Engineer if underground fuel storage tanks, asbestos, PCBs, contaminated soils, lead or other hazardous materials are encountered.

3.2 UTILITY SERVICES

A. Follow rules and regulations of authorities or companies having jurisdiction over communications, pipelines, and electrical distribution services.

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B. Notify and coordinate with utility company and adjacent building occupants when temporary interruption of utility service is necessary.

C. When required by the Work, cutting, patching and fitting of Work to existing facilities, accommodating installation or connection of Work with existing facilities, or uncovering Work for access, inspection, or testing shall be performed in accordance with Section 01700 –

Execution Requirements.

3.3 MECHANICAL WORK ITEMS

A. Mechanical removals consist of dismantling and removing existing piping, pumps, motors, water tanks, equipment and other appurtenances. It includes cutting, capping, and plugging required to restore use of existing utilities.

B. Remove existing process, water, chemical, gas, fuel oil and other piping not required for new work. Take out piping to the limits shown or to a point where it will not interfere with the new work. Piping not indicated to be removed or which does not interfere with new work shall be removed to the nearest solid support, capped and the remainder left-in-place. Purge chemical and fuel lines and tanks. Verify that such lines are safe prior to removal or capping.

C. Where piping that is to be removed passes through existing walls, cut and cap piping on each side of the wall. Use cap appropriate for pipe material to be capped. Provide fire-rated sealant for walls classified as fire-rated.

D. When underground piping, which is not located in the public right-of-way, is to be altered or removed, cap the remaining piping. Abandoned underground piping may be left-in-place unless it interferes with the new work or is shown or specified to be removed. Piping less than

15 inches in diameter may be plugged and abandoned in place. For piping 15 inches in diameter and greater to be abandoned, fill with sand, pressure grout or other approved method and plug with concrete or brick masonry bulkhead.

E. Remove waste and vent piping to points shown. Plug pipe and cleanouts and plugs. Where vent stacks pass through an existing roof that is to remain, remove the stack and patch the hole in the roof, making it watertight. Comply with requirements of existing roof installer so as to maintain roof warranty.

F. Conform to applicable codes when making any changes to plumbing and heating systems.

3.4 ELECTRICAL WORK ITEMS

A. Electrical removals consist of disconnection and removing existing switchgear, distribution switchboards, control panels, bus duct, conduits and wires, panel boards, lighting fixtures, and miscellaneous electrical equipment.

B. Remove existing electrical equipment and fixtures to prevent damage to allow continued operation of existing systems and to maintain the integrity of the grounding systems.

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C. Remove poles and metering equipment, if designated for removal on the Plans. Coordinate electrical removals with the power company, as necessary. Verify that power is properly de-energized and disconnected.

D. Where shown or otherwise required, remove wiring in underground duct systems. Verify function of wiring before disconnecting and removing. Plug ducts which are not to be reused at entry to buildings.

E. Changes to electrical systems shall conform to applicable codes.

3.5 CLEAN-UP AND RESTORATION

A. Perform clean-up and restoration in and around construction zone.

B. Remove from the site all items contained in or upon the structure not designated for reuse or salvage. It shall be the Contractor’s responsibility to obtain all necessary permits for disposal.

C. Follow method of disposal as required by regulatory agencies.

END OF SECTION 024113

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SECTION 024116 - STRUCTURE DEMOLITION

1.2 SUMMARY

1. Demolition and removal of buildings and site improvements.

2. Removing below-grade construction.

3. Disconnecting, capping or sealing, and removing site utilities.

4. Salvaging items for reuse by Owner.

B. Related Sections:

1. Section 011000 "Summary" for use of the premises and phasing requirements.

2. Section 013200 "Construction Progress Documentation" for preconstruction photographs taken before building demolition.

3. Section 024119 “Selective Structure Demolition” for partial demolition of buildings, structures, and site improvements.

4. Section 330500 "Common Work Results For Utilities" for shutting off, disconnecting, removing, and sealing or capping utilities.

5. Section 311000 "Site Clearing" for site clearing and removal of above- and below-grade site improvements not part of building demolition.

1.3 DEFINITIONS

A. Remove: Detach items from existing construction and legally dispose of them off-site unless indicated to be removed and salvaged.

B. Remove and Salvage: Carefully detach from existing construction, in a manner to prevent damage, and deliver to Owner ready for reuse. Include fasteners or brackets needed for reattachment elsewhere.

1.4 MATERIALS OWNERSHIP

A. Unless otherwise indicated, demolition waste becomes property of Contractor.

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B. Historic items, relics, antiques, and similar objects including, but not limited to, cornerstones and their contents, commemorative plaques and tablets, and other items of interest or value to

Owner that may be uncovered during demolition remain the property of Owner.

1. Carefully salvage in a manner to prevent damage and promptly return to Owner.

1.5 INFORMATIONAL SUBMITTALS

A. Qualification Data: For qualified refrigerant recovery technician.

B. Proposed Protection Measures: Submit informational report, including Drawings, that indicates the measures proposed for protecting individuals and property for dust control and for noise control. Indicate proposed locations and construction of barriers.

1. Adjacent Buildings: Detail special measures proposed to protect adjacent buildings to remain including means of egress from those buildings.

C. Schedule of Building Demolition Activities: Indicate the following:

1. Detailed sequence of demolition work, with starting and ending dates for each activity.

2. Temporary interruption of utility services.

3. Shutoff and capping or re-routing of utility services.

D. Inventory: Submit a list of items to be removed and salvaged and deliver to Owner prior to start of demolition.

E. Predemolition Photographs: Show existing conditions of adjoining construction and site improvements, including finish surfaces that might be misconstrued as damage caused by demolition operations. Comply with Section 013233 "Photographic Documentation." Submit before the Work begins.

F. Landfill Records: Indicate receipt and acceptance of hazardous wastes by a landfill facility licensed to accept hazardous wastes.

G. Statement of Refrigerant Recovery: Signed by refrigerant recovery technician responsible for recovering refrigerant, stating that all refrigerant that was present was recovered and that recovery was performed according to EPA regulations. Include name and address of technician and date refrigerant was recovered.

1.6 QUALITY ASSURANCE

A. Refrigerant Recovery Technician Qualifications: Certified by EPA-approved certification program.

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B. Regulatory Requirements: Comply with governing EPA notification regulations before beginning demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

C. Standards: Comply with ANSI/ASSE A10.6 and NFPA 241.

D. Predemolition Conference: Conduct conference at Project site.

1. Inspect and discuss condition of construction to be demolished.

2. Review structural load limitations of existing structures.

3. Review and finalize building demolition schedule and verify availability of demolition personnel, equipment, and facilities needed to make progress and avoid delays.

4. Review and finalize protection requirements.

5. Review procedures for noise control and dust control.

6. Review procedures for protection of adjacent buildings.

7. Review items to be salvaged and returned to Owner.

1.7 PROJECT CONDITIONS

A. Buildings to be demolished will be vacated and their use discontinued before start of the Work.

B. Buildings immediately adjacent to demol i t ion area wil l be occupied. Conduct building demolition so operations of occupied buildings will not be disrupted.

1. Provide not less than 72 hours' notice of activities that will affect operations of adjacent occupied buildings.

2. Maintain access to existing walkways, exits, and other facilities used by occupants of adjacent buildings.

a. Do not close or obstruct walkways, exits, or other facilities used by occupants of adjacent buildings without written permission from authorities having jurisdiction.

C. Owner assumes no responsibility for buildings and structures to be demolished.

1. Conditions existing at time of inspection for bidding purpose will be maintained by

Owner as far as practical.

2. Before building demolition, Owner will remove the following items:

a. As indicated.

D. Hazardous Materials: It is not expected that hazardous materials will be encountered in the

Work.

1. Hazardous materials will be removed by Owner before start of the Work.

2. If materials suspected of containing hazardous materials are encountered, do not disturb;

immediately notify Architect and Owner. Hazardous materials will be removed by

Owner under a separate contract.

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E. Hazardous Materials: Hazardous materials are present in buildings and structures to be demolished. A report on the presence of hazardous materials is on file for review and use.

Examine report to become aware of locations where hazardous materials are present.

1. Hazardous material remediation is specified elsewhere in the Contract Documents.

2. Do not disturb hazardous materials or items suspected of containing hazardous materials except under procedures specified elsewhere in the Contract Documents.

3. Owner will provide material safety data sheets for materials that are known to be present in buildings and structures to be demolished because of building operations or processes performed there.

F. On-site storage or…