Attachment 1 - Subsurface Air Rotary Drilling Contract Specifications.pdf

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Attached to
Subsurface Air Rotary Drilling
Solicitation number
6100063456
Issued by
Cambria County, Pennsylvania

About this file

This document is a set of contract specifications from the Pennsylvania Department of Environmental Protection, Bureau of Abandoned Mine Reclamation, for a deep mine pool monitoring project located in the Bituminous Coal Region. The project requires a contractor to drill and install approximately 25 mine pool monitoring wells over a two-year period, with boreholes ranging from 50 to 300 feet in depth (average 125 feet). The contractor will be responsible for providing all labor, equipment, and materials to drill rotary boreholes, install casing, and complete monitoring wells, primarily targeting mine pool monitoring purposes in the Cambria Office region.

The contract specifications outline detailed requirements for mobilization, drilling procedures, casing installation, well completion, and site restoration. Payment will be made on a unit price basis for various tasks such as drilling, casing installation, stand-by time, and restoration. The contractor must follow strict guidelines for drilling, including managing potential challenges like fractured bedrock, underground mining voids, and pressurized groundwater conditions. The Department will provide certain materials like steel well guards and caps, and the contractor must adhere to specific grouting, sealing, and documentation procedures. The contract includes provisions for potential modifications to the work site and requires the contractor to minimize damage to existing property and infrastructure.

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CONTRACT SPECIFICATIONS

SCOPE OF WORK

The Department of Environmental Protection, Bureau of Abandoned Mine Reclamation, requires a contractor to drill and install approximately 25 mine pool monitoring wells over a two-year period for a deep mine pool monitoring project, located in the Bituminous Coal Region with projects originating from the Cambria Office, Investigation Section. Contractor shall furnish all labor, technical assistance, equipment, tools and material necessary to perform the required tasks.

Contractor shall drill 25 proposed rotary boreholes, installing casing and completing boreholes, primarily for mine pool monitoring purposes.

When requested by the Department Representative, Contractor shall provide a completely mobilized rotary drilling rig on the project site within 14 days of being notified to proceed.

Contractor shall mobilize the drilling rig to the work site together with all necessary supporting equipment to create access to individual drilling locations and drill test borings that may range from approximately 50 to 300 feet in depth, with an approximate average depth of one hundred

125 feet. Contractor shall install casing pipe and perform required reclamation.

Contractor shall drill overburden materials and bedrock to determine subsurface conditions, installing casing pipe and completing each boring as a permanent monitoring well. The bedrock may be fractured and caved due to underground mining. While performing drilling, Contractor may encounter shallow groundwater conditions and mine voids connected to the pressurized mine pool.

Contractor shall advance 25 borings sufficient in diameter to accommodate three-inch inside diameter (I.D.) PVC pipe. The proposed borings must be advanced through overburden, bedrock, fractured bedrock, coal and mined coal (voids), into a targeted mine void, developed and completed as a mine pool monitor well. For all borings, Contractor shall grout the required three-inch I.D. PVC casing pipe as specified in this agreement, then complete the grouting at the surface with either a nominal four-inch diameter steel well guard (including threaded cap), cemented in-place, or an optional flush-mounted, watertight, monitor well cover. The four-inch steel well guard and threaded cap and flush mount will be provided by the Department.

In order to ensure completion of work at each site, Contractor shall remove all equipment, sealing of abandoned boreholes, with the restoration and the seeding of the surface to a condition equal to or better than that existing prior to the start of the project work.

Due to the nature of the work, it may be necessary to slightly for the Department to modify the tasks at the work site while the work is being conducted. Such modifications may include: 1) relocation of boreholes, 2) deletion of boreholes, 3) addition of boreholes in the vicinity of the work site, 4) variation of the depth of individual boreholes proposed for a work site, 5) variation of the cased depth of individual boreholes in the vicinity of the work site, and 6) completion requirements for individual monitor well boreholes.

Contractor shall furnish all necessary labor, material and equipment to perform all the required work required in this agreement in an expeditious, substantial and professional manner.

Any questions regarding the Specifications should be directed to Scot May at 814.472.1712.

Any questions concerning the contracting or bidding process should be directed to

Angela Vermeulin at 814.472.1808.

SPECIFICATION NO. 1: WORK SITE MOBILIZATION AND DEMOBILIZATION

1.1 SCOPE

The work covered by this Specification consists of the delivery to the work site of all equipment, material and supplies, acquisition of any permits, removal from the site of all equipment after the completion of work and restoration of the site and final inspection by the Department’s Representative.

1.2 PROCEDURE

Mobilization consists of the delivery to the work site of all equipment, material and supplies to be furnished by the Contractor, the complete assembly in satisfactory working order of all such equipment on the job, and the satisfactory storage at the site of all such materials and supplies. Moving between boreholes and set-ups at borehole locations included under this agreement will be incidental to the other appropriate pay items and no separate payment will be made.

Demobilization consists of the removal of all equipment from the project site, the clean-up and the restoration of any damaged areas to as good or better condition than that which existed prior to the commencement of work. This work will include reseeding of areas designated by the Department’s Representative.

All equipment and methods to be used by the Contractor are subject to approval by the

Department’s Representative. However, approval of the equipment will not be construed as approval of the performance thereof. Contractor shall furnish any additional or “special” equipment necessary for him to obtain the desired end results.

Contractor, at its expense, shall obtain all permits, of whatever nature, necessary for the completion of this work, and Contractor shall comply with all existing laws, ordinances, rules and regulations relating to its operations. Consents for Right of Entry from property owners will be obtained by the Department or its designated representative.

Contractor shall make every effort to minimize damage incidental to site access and the drilling operations. Maximum use must be made of existing roads and lanes for access.

Where it is necessary to deviate from roads and lanes, such deviation must be by one track, at a location causing the least damage.

Contractor will be liable to the property owners for any damage to vegetation, crops or property, irrespective of whether the damage was caused by negligence or was an unavoidable consequence of drilling operations. The Department shall consult with property owners prior to moving equipment to the drilling location.

If boring locations are adjacent to streets, Contractor shall maintain traffic control at all times.

1.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made on the basis of a complete unit, work site, but only to the extent directed by the Department’s Representative.

Payment will be made at the Contract Unit Price bid per work site for Contract Item, “work site Mobilization and Demobilization,” which price and payment will constitute full compensation for furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily complete these items of work.

Mobilization will be paid in the amount of 40% of the unit price bid following complete mobilization at the work site.

Demobilization will be paid in the amount of 60% of the unit price bid following complete demobilization from the work site.

SPECIFICATION NO. 2: BULLDOZER MOBILIZATION AND DEMOBILIZATION

2.1 SCOPE

The work covered by this Specification consists of mobilizing and demobilizing a bulldozer. Access to most of the boreholes will need short access routes built to borehole locations off existing rights-of-way.

2.2 PROCEDURE

Authorization will be given by the Department’s Representative to mobilize and demobilize a bulldozer, JD 650, equal size or larger with dozer blade, for the construction of access routes, development of drilling sites, moving of the drill rig into and out of position and regrading after drilling operations.

2.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made on the basis of a complete unit, but only to the extent directed by the Department’s Representative.

Payment will be made at the Contract Unit Price bid per work site for Contract Item, “Bulldozer Mobilization and Demobilization,” which price and payment constitutes full incidentals required to satisfactorily complete this item of work.

Mobilization will be paid in the amount of 40% of the unit price bid following complete mobilization at the work site.

Demobilization will be paid in the amount of 60% of the unit price bid following complete demobilization from the work site.

SPECIFICATION NO. 3: BULLDOZER WITH OPERATOR

3.1 SCOPE

The work covered by this Specification consists of operating a bulldozer. When necessary for ingress, egress or drilling, a bulldozer will be authorized by the Department’s

Representative.

3.2 PROCEDURE

A bulldozer, John Deere JD 650, equal size or larger with dozer blade and operator must be utilized for access as necessary to carry on drilling activities.

3.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made on an hourly basis for actual operation of the equipment, but only to the extent directed by the Department’s

Payment will be made at the Contract Unit Price bid per hour for Contract Item, “Bulldozer with Operator, JD 650, Equal Size or Larger with Dozer Blade,” and will be divided no finer than by one-half hour increments, which price and payment will constitute full

SPECIFICATION NO. 4: DRILLING ROTARY BOREHOLES

4.1 SCOPE

The work covered by this Specification consists of furnishing all labor, material, equipment, supplies and all necessary incidentals required to drill boreholes through unconsolidated overburden material, rock and mined coal beds.

A. Boring Locations

The individual sites of the work to be performed will be at locations within the boundaries of the properties shown on provided boring plans. All boring sites will be located in the field by the Department and the Commonwealth will furnish the surface elevations of each borehole. Contractor shall notify Pennsylvania One Call to ascertain the location of utilities from the appropriate utility companies and to verify all measurements to ensure that all borings are made at locations that will not interfere with or harm existing surface or subsurface utilities. Contractor shall notify the Department when a conflict occurs. Contractor is solely responsible for any damage to existing utilities resulting from their operations.

B. Equipment and Supplies

Drilling of all boreholes must be conducted using non-percussion rotary drills for softer formations, percussion rotary drills (e.g., air rotary with DTH or top hammer) for harder rock, or tri-cone bits for loose or mixed soils, each selected for efficient material removal based on geological conditions.

Drilling must take place at locations shown on the provided Project Drawings or as designated by the Department’s Representative, using all necessary gauges and accessories to produce complete and continuous boreholes with a sufficient diameter for six-inch (6”) overburden surface casing, allowing for the installation of three-inch (3”) I.D. PVC casing pipe to the specified depth. Contractor shall select the drilling methods and equipment, subject to approval by the Department.

Supplies for borehole drilling must include all casing, drill rods, bits, piping, pumps, water, tools, power and all other items required for satisfactory performance of required work. Bits must be the proper kind for the type of rock being drilled.

The rock section to be drilled may include significantly caved and broken strata due to underground mining and subsidence.

All equipment and methods to be used by the Contractor are subject to approval by the Department. However, approval of the equipment may not be construed as approval of Contractor’s performance. Contractor shall furnish any additional or special equipment necessary to meet this agreement’s requirements.

Contractor shall provide a secure, firm and level work platform at each borehole location. Borings must not be offset from locations shown on the boring layout sketch without approval of the Department.

Any compressed air or water necessary for the drilling activity will be at

Contractor’s sole expense. No separate payment will be made for obtaining water.

4.2 PROCEDURE

Contractor shall perform all work under the direction of the Department. Contractor shall make borings into soil, refuse, overburden, bedrock, fractured bedrock, coal and mined coal beds (voids). The purpose of penetrating the subsurface is to ascertain the depth and thickness of subsurface strata, to provide samples of soil, refuse, rock and coal material and to determine mine pool elevation. Sampling of soil, refuse, overburden, rock and coal materials must only be by recovery of cuttings if and when directed by the Department.

Determination of groundwater or mine pool elevation will be by electronic tape performed by the Department.

The drill rig must be equipped with dust controls to reduce the amount of dust discharged to the atmosphere. The dust controls must be maintained to ensure they are in proper working condition throughout the project.

The drill rig must be equipped to handle high quantities of formation water including pressurized mine water. All cuttings and water from the borings must be prevented from migrating from the drilling site. It is anticipated that in some borings, groundwater will be encountered in the first few feet of drilling.

Contractor shall drill 25 boreholes with sufficient diameter to accommodate three-inch (3”)

I.D. PVC casing pipe through bedrock, fractured bedrock and mine voids to a depth designated by the Department.

Contractor shall develop completed borings as mine pool monitoring wells. A three-inch

(3”) I.D. PVC casing pipe will be grouted in-place and finished with a nominal four-inch

(4”) steel well guard (including threaded cap, supplied by the Department) also grouted in-place (see sketches for details) or an optional flush-mounted, watertight, monitor well cover (if needed, will be provided by the Department)

In the event the walls of the borehole begin to cave or barrel prior to installing of the casing

Contractor shall stabilize the borehole wall by the method of its choosing and at its sole expense, provided it meets the approval of the Department. A six-inch (6”) I.D. protective casing may be necessary to stabilize the borehole in challenging geological conditions or to provide a larger annular space for effective grouting, thereby ensuring the integrity and longevity of the well. This casing also serves to meet safety and regulatory requirements when additional structural support is required.

If drilling does not encounter solid bedrock to anchor the casing Contractor shall support the casing by a method of its choosing to prevent movement of the casing down the hole and its sole expense, provided it meets the approval of the Department.

Contractor shall drill plumb and stable boreholes. Appropriate measures such as use of temporary overburden casing and drill stem stabilizers may be required to achieve this goal.

In drilling rock (including fractured and broken rock), Contractor shall operate its drills at such speeds, feeds and pressures as will ensure maximum information collection and borehole verticality. Whenever voids or soft spot zones are encountered, the rotation of the drill must be limited to determine the nature and thickness of the void by restricting down-pressure and observing the action of the rig. Since the function of the drilling includes determination of the thickness, orientation, extent and spacing of mined zones, Contractor shall exercise particular care in recording circulation losses, rod drops and other unusual drilling experiences, which, supplementing the borehole record, will yield information pertaining to the nature and extent of mining.

Failure to comply with the foregoing procedure, when ample warning of unusual subsurface conditions has been received in advance, constitutes justification for the

Department to require re-drilling, at the Contractor’s expense, of any boring from which drilling information is unsatisfactory.

The depths of the individual boreholes are an estimate and may range from approximately fifty to 50 to 300 feet, with an approximate average depth of 125 feet. The termination depth of all boreholes will be at the discretion of the Department. Contractor shall account for cost adjustments for boreholes that are significantly deeper or shallower than the average depth. Drilling must take place at locations shown on the Drawings or as designated by the Department.

4.3 DELIVERY OF RECORDS

Contractor shall furnish, to the Department, the following records for each borehole within the following time constraints:

A. One pencil copy of each boring log, not later than 48 hours after the completion of each borehole.

B. Two typed copies or electronic copies (PDF or similar format) of each borehole log not later than twenty-one (21) days after completion of all the boreholes. Each log must provide pertinent information such as, but not limited to:

1. Project name and contract number, borehole number, location of borehole, ground elevation, total depth of borehole, time-date of starting, time-date of completion, driller’s name and logger’s name.

2. Depth of unconsolidated material (top of bedrock).

3. Air loss or loss of returns.

4. Rock types (description of cuttings).

5. Measured void or caved and broken zone.

6. Depth to each water bearing zone.

7. Blown yield in GPM.

8. Linear feet, size, type of casing.

9. Depth of groundwater or mine pool during drilling and (where possible) after twenty-four (24) hours.

10. Notes, remarks, or information on pertinent incidents during drilling operations.

11. Copies of any other records kept by the Contractor, which in opinion of the

Department, will aid in the interpretation of the borings at any time requested during the contract.

No additional payment will be made for delivery of Logs because Logs are included in the Contract Item, “Drilling Rotary Boreholes”.

4.4 SEALING ABANDONDED BOREHOLES

At the direction of the Department, Contractor shall seal abandoned boreholes as follows:

1. Upon completion and acceptance of the borehole and at the direction of the

Department, Contractor shall seal the entire depth of the abandoned boring.

2. Grout mix must be placed on top of the plug to a point selected by the Department.

In the event that significant quantities of water are encountered, Contractor may be required to set the plug below the aquifer and build the seal from that elevation.

3. Depending on the borehole stability, the temporary overburden casing (when used) must be partially or totally withdrawn, and the cement or concrete plug is allowed to set for 24 hours. Additives to accelerate the curing period may be used when approved by the Department. The borehole must then be stemmed to within twelve inches (12”), depending on land use as determined by the Department, of the surface with sand, gravel or refuse material.

4. In the event the temporary overburden casing (when used) cannot be recovered, it must be cut off 12 inches below the ground surface, depending on the land use and the borehole must be sealed as indicated in the immediately preceding sealing steps

1 - 3.

5. The top 12 inches of the borehole, depending on land use, must be filled with topsoil or pavement material equivalent to the existing topsoil or pavement material at the surface.

6. The surface must be restored to as good as or better than the original condition.

7. The cost of sealing boreholes will be incidental to other Contract Items and no separate payment to Contractor will be made.

8. Contractor shall use the Tremie grouting method to grout all boreholes. The grout mix must meet project specifications. Contractor shall monitor the grouting process and inspect the boreholes post-grouting, with remedial action required at no additional cost if necessary.

4.5 ABANDONED BORINGS

Except with the permission of the Department, Contractor shall not abandon or complete any boring, or remove any casing or drilling equipment, without first affording the

Department the opportunity to obtain the position and the depth of the boring to abandonment or completion and secure water level readings and samples of the material already penetrated and any other information that the Department may require.

No payment will be made for any boring that has been abandoned by the Contractor before reaching the depth, elevation or condition specified, unless the Department approves and accepts the boring as being completed. Any boring abandoned by the Contractor without the Department’s approval must be sealed at the Contractor’s expense. The Department may, at the Department’s option, accept a boring which fails to reach the required depth due to an unusual obstruction, which, in the Department’s opinion, could not reasonably have been anticipated.

4.6 INSPECTIONS

Ample opportunity will be furnished at all times to the Department for inspecting the work.

If any imperfect work is performed at any time, Contractor shall remedy the defects at its sole expense and to the full satisfaction of the Department. No drilling, nor set-up, nor restoration, nor field testing may be done except in the presence of the inspector or

Department, unless specific permission has been granted to the contrary. The presence of an inspector, or the keeping of separate drilling records by the Department, does not relieve

Contractor of the responsibility to complete work specified in the Contract.

4.7 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, for non-percussion or percussion rotary drilling of the diameter specified will be made based on the linear feet of holes drilled and accepted by the Department’s Representative, but only to the extent directed.

Payment will be made at the Contract Unit Price for the item "Borehole Abandonment," which will constitute full compensation for all labor, materials, equipment, supplies and incidentals required to satisfactorily complete this work.

SPECIFICATION NO. 5: FURNISHING AND INSTALLING SCHEDULE 40 PVC

CASING PIPE

5.1 SCOPE

The work covered by this Specification consists of providing all labor, material, equipment and incidentals required to furnish and install six-inch (6”) I.D. overburden casing pipe into the boreholes.

5.2 PROCEDURE

Contractor shall furnish and install new plastic casing pipe in all boreholes, which must be used for monitoring purposes. Plastic casing pipe must be Schedule 40 with threaded flush-joint couplings. The Department Representative shall specify casing pipe size and type and must approve all casing pipe before it is installed in the boreholes.

Contractor shall install six-inch inside diameter overburden casing pipe, as specified, in the boreholes from the surface through the unconsolidated overburden to a point five feet (5’) into solid rock strata. The casing pipe must then be set and sealed tightly with cement grout before continuing the drilling of the boreholes through the rock strata unless otherwise directed by the Department’s Representative.

If the rock strata, in which the casing pipe is installed, is found to be of a friable nature, Contractor shall extend the depth limit for installing casing pipe to a point satisfactory to the Department’s Representative.

The cost of anchoring borehole casing pipe to overburden casing pipe, by welding or grouting and of making an airtight seal must be included in the price per linear foot for the specified diameter borehole casing pipe as listed in the Contract Unit Price.

All boreholes designated by the Department’s Representative as suitable for flushing or monitoring use must be covered at the surface with a threaded metal or plastic plug or cap as provided by the Department’s Representative.

Pressurized Groundwater Conditions:

If pressurized groundwater (e.g., artesian conditions) is encountered during drilling operations, Contractor shall take all necessary measures to control the flow and safely manage the condition. This includes sealing the borehole, installing temporary casing, or applying pressure grouting as required to stabilize the site and prevent environmental or structural impacts. Contractor must maintain additional safety measures, such as pressure caps or flow control equipment, on-site at all times to address these conditions. All additional work, materials and equipment required to address pressurized water conditions must be performed as directed and paid under the Contract Item “Pressurized Water

Conditions.”

5.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, for casing pipe will be made based on the linear feet of casing pipe of the diameter and type specified, furnished and installed, but only to the extent directed.

Payment will be made at the Contract Unit Price bid per linear foot for Contract Items, “Furnishing and Installing Overburden Casing Pipe, Six-Inch (6”) I.D. Overburden Casing

Pipe Including Grouting and Plug or Cap,” which price and payment will constitute full

SPECIFICATION NO. 6: FURNISHING AND INSTALLING PVC WELL CASING

6.1 SCOPE

The work covered by this Specification consists of furnishing and installing three-inch I.D.

PVC well casing pipe including completion as a mine pool monitor well. All monitoring are the responsibility of the Department.

6.2 PROCEDURE

Contractor shall furnish and install new Schedule 40 PVC three-inch I.D. well casing pipe.

The pipe must rest on the bottom of the borehole and the bottom five feet of pipe shall have three rows of one-inch diameter holes spaced a maximum of six inches apart. The top of the three-inch plastic casing may not be more than six inches lower than the top of the steel outer casing. The Department must approve all casing pipe before it is installed in the borehole. The casing pipe must be installed in the borehole to the required depth with a surface stickup of three feet. All casing pipes left in place must be securely grouted using a tremie pipe and completed as a groundwater monitor well.

The plastic pipe must be grouted in place to the ground surface using the following procedure. A metal grout basket must be installed on the casing at a depth of approximately ten feet above the roof of the mine (top of the mine void). A rubber fernco will not be accepted as a grout basket. Approximately five feet of time release bentonite pellets must be added on top of the grout basket. Prior to grouting, the pellets must be given enough time to activate according to the manufacturer’s specifications. Grout must be placed using tremie pipe. Depending upon the depth of the hole, grouting may be required to be completed in stages as directed by the Department’s Representative.

No surface standpipe may be above the ground surface if the well is to be completed with a flush mounted well guard.

Grout must be placed under pressure and must be composed of a mixture of Portland cement and bentonite. Bentonite must be mixed with the cement at a ratio of three to five pounds per sack of cement (assuming 94 lb. cement sacks) and must be combined with six and one-half gallons of water. The cement must meet the requirements of ASTM 150, Type II for sulfate resistance. Centralizers may be required by the Department if deemed necessary to ensure the casing is properly sealed.

The cost of grouting will be incidental to the “Furnishing and Installing PVC Well Casing

Pipe”. The total length and type of casing installed and depth to the bottom of the casing below the surface must be recorded in the drilling log.

6.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved for three-inch I.D. PVC casing pipe, will be made based on the linear foot of casing pipe of the diameter and type specified furnished, installed, left in place, grouted and completed as a groundwater monitor well, but only to the extent directed by the Department.

Payment will be made at the Contract Unit Price quote per linear foot for “Furnishing and

Installing PVC Well Casing Pipe”, which price and payment will constitute full incidentals required to satisfactorily complete these items of work.

SPECIFICATION NO. 7: INSTALLING STEEL CASING PIPE

7.1 SCOPE

The work covered by this Specification consists of installing four-inch I.D. steel casing pipe with threaded cap including completion as protective well guards or an optional flush-mounted, watertight, monitor well cover. Both will be provided by the Department.

7.2 PROCEDURE

Contractor shall install new and/or acceptable used Schedule 40 steel four-inch I.D. casing pipe, provided by the Department, to a minimum depth of two feet below the surface regardless of the soil, refuse, or overburden thickness. The casing pipe must be securely grouted in-place with a standpipe of three feet using Portland cement. Contractor shall complete the installation procedure with a threaded cap on the four-inch I.D. steel casing provided by the Department. An optional flush-mounted, watertight, monitor well cover can be substituted and installed utilizing best industry standards, when requested and approved by the Department.

7.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved for the well guards will be made on a per well

(Each) basis for installing four-inch I.D. steel casing pipe/well guards, including grouting and threaded caps or an optional flush-mounted, watertight, monitor well cover, but only to the extent directed by the Department.

Payment will be made at the Contract Unit Price quote per well (Each) for “Furnishing and

Installing Three-Inch Schedule 40 PVC Well Casing Pipe”, which price and payment will constitute full compensation for furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily complete these items of work.

SPECIFICATION NO. 8: STAND-BY TIME

8.1 SCOPE

The work item covered by this Specification addresses any delays in drilling in which a drill rig and crew is ordered by the Department to stand idle.

8.2 PROCEDURE

When the Contractor is ordered by the Department to delay the drilling of any borings, Contractor will be reimbursed for any such delays providing that the delays are the sole responsibility of the Department, and the delays are more than one-half hour in duration.

Stand-by time may not be used for payment to the Contractor for delays caused by equipment breakdown and malfunctions or for delays caused by non-availability of necessary equipment and supplies. Such delays are the sole responsibility of the Contractor and will be incidental to other items of work such that no additional compensation will be allowed. No payment for stand-by time will be made for items of equipment other than complete drill rig and crew in full operating condition.

A crew must consist of a driller and helper and if any delay does occur, the Department will record it daily with dates and times directed to be idle.

8.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made on the basis of the hours a drill rig and crew is ordered to stand idle, but only to the extent directed by the Department.

Payment will be made at the Contract Unit Price quote Per Hour for “Stand-by Time” and will be divided no finer than one-half hour increments, which price and payment constitutes full compensation for the delay of a drill rig and crew.

SPECIFICATION NO. 9: RESTORATION

9.1 SCOPE

The work covered under this Specification consists of providing all labor, material, equipment and other incidentals necessary to restore the area surrounding a borehole and the access to a borehole to a condition equal to or better than that which existed prior to the start of work. The work included in this Specification is considered discretionary and must be directed, approved and accepted by the Department’s Representative.

9.2 PROCEDURE

In the case of a borehole located on private property, restoration includes, but is not limited to, repairing, or replacing any sidewalks, fences, lawns, seeding and access road and other improvements to the property which may have been damaged or removed because of the work, but only to the extent directed, approved and accepted by the Department’s

In the case of a borehole located on paved surfaces (driveways, streets, roads, alleys) where damage is limited to a borehole drilled through the paved surface, restoration includes, but is not limited to, patching the borehole with the same pavement material and cleanup of the site, but only to the extent directed, approved and accepted by the Department’s

9.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, for restoration at the specified locations, will be made based on each borehole restored, but only to the extent directed, approved and accepted by the Department’s Representative.

Payment will be made at the Contract Unit Price bid per each borehole for Contract Item, “Restoration,” which price and payment will constitute full compensation for furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily complete this item of work. No payment will be made for restoration that has not been directed, approved and accepted by the Department’s Representative.

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