Attachment 1 - Subsurface Rotary Drilling Specifications - AMD 17(1416)107.1.pdf

Contract No. AMD 17(1416)107.1 Hollywood AMDTP – Sludge Disposal Borehole I-3

SUBSURFACE ROTARY DRILLING

SPECIFICATIONS

I. SCOPE OF WORK

The Department of Environmental Protection, Bureau of Abandoned Mine Reclamation requires a contractor to conduct a subsurface conventional air-rotary drilling project within the delineated Project area as indicated on the Attachment 5 to this agreement entitled, - “Plan.” The work to be performed under this Contract will require non-percussion or percussion air-rotary drilling at a series of hole locations within the Work Area. The Contractor shall furnish all labor, technical assistance, equipment, tools and material necessary to perform the Contract tasks.

The items of work to be performed at the Contract are:

1 Work site mobilization and demobilization 1 Each

2A Drilling Pilot Boreholes (min 4.5 inch) 135 L.F.

2B Drilling Boreholes to Accommodate 15 L. F.

Eighteen-Inch (18”) Nominal Sch 40 Steel Overburden Casing Pipe

2C Drilling Boreholes to Accommodate 30 L. F.

Fourteen-Inch (14”) Sch 40 PVC Overburden

2D Drilling Boreholes to Accommodate 135 L. F.

Eight-inch (8”) SDR17 Certa-Lok, or equivalent, 3A Eighteen-Inch (18”) Nominal Sch 40 Steel Overburden 15 L.F Borehole Casing Pipe.

3B Fourteen-Inch (14”) Sch 40 PVC Casing Pipe 30 L.F

Including Tremie-Grouting

3C Eight-inch (8”) SDR17 Certa-Lok, or equivalent, 135 L.F

Casing Pipe Including Tremie-Grouting

4 Eight-inch (8”) SDR17 PVC Sealing Cap 1 Each

5 Pilot Borehole Abandonment 1 Each

6 Stand-by Time 1 Hour

When requested by the Department Representative, the Contractor shall provide a completely mobilized rotary drilling rig on the project site within thirty (30) days of being notified to proceed.

Contractor will have to move the air-rotary drilling rig to the project site together with all necessary supporting equipment and provide air or water for drilling. This work at the site will include drilling rotary boreholes using tri-cone or Percussion rotary for the purpose of obtaining continuous rock chip samples of bedrock, determination fracture zones and voids. Contractor shall be prepared for directing and handling drilling water at the surface and drill cuttings to prevent any unwanted offsite influence.

Contractor shall furnish and install eighteen-inch (18”) nominal Schedule 40 Steel overburden casing pipe, furnish, install and tremie-grout fourteen-inch (14”) Sch 40 and eight-inch (8”) SDR17 Certa-Lok, or equivalent, casing pipe in the hole as designated by the Department Representative within the work area. The eighteen-inch (18”) casing will be used if needed to allow for drilling of the fourteen-inch (14”) casing through loose unconsolidated material.

Once all work at the project site is completed, the Contractor shall remove all equipment from the project site. All post-construction site conditions shall be as good or better than pre-construction site conditions.

Due to the nature of the work, it might be necessary to slightly modify the tasks for borehole construction while the work is being conducted. Such modifications could include: (1) relocation of boreholes, (2) variation of the depth of the holes proposed for this project. Any modifications shall be approved and directed by the Department Representative.

The Contractor agrees to furnish all necessary labor and equipment and to perform all the work and labor required herein in an expeditious, substantial and workman-like manner.

Any questions regarding the Technical Specifications should be directed to Amanda Leasure at 814-472-1800. Any questions concerning the contracting or bidding process should be directed to Jeannine Estok at 814-472-1800.

II. CONTRACT TASKS

SPECIFICATION NO. 1: MOBILIZATION AND DEMOBILIZATION

1.1 SCOPE

The work covered by this section consists of the delivery to the project area of all equipment, material and supplies, acquisition of any permits, removal from the site of all equipment after the completion of work, delivery of records, and final inspection by the Department Representative.

1.2 PROCEDURE

Mobilization shall consist of the delivery to the project area 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 supplies. Moving between holes and setups at hole locations included under the Contract shall be incidental to the other appropriate Contract item and no separate payment will be made.

Demobilization shall consist of the removal of all equipment from the project area and clean-up and restoration of any damaged areas to as good as or better condition than that which existed prior to the commencement of work.

All equipment and methods to be used by the Contractor shall be subject to approval by the Department Representative. However, approval of the equipment shall not be construed as approval of the performance thereof. The Contractor shall furnish any additional or “special” equipment necessary for him to obtain the desired end results.

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

Every effort shall be made to minimize incidental damage during access and drilling.

Maximum use will be made of existing roads and lanes for access. Where it is necessary to deviate from roads and lanes, such deviation shall be by one (1) track, at a location causing the least damage.

The Contractor shall be liable to the property owners for any damage to vegetation, crops, and/or property, irrespective of whether the damage was caused by his negligence or was an unavoidable consequence of drilling operations. The Contractor shall be liable for any and all damage, including damages for necessary access. The Contractor shall be required to consult with property owners as to when he intends to move equipment to the drilling locations.

1.3 DELIVERY OF RECORDS

The Contractor shall be responsible for furnishing the following records for the project area within the following time constraints:

A. Two (2) typed copies or electronic copies of each borehole log, no later than twenty-one (21) days after completion of all of the boreholes Each borehole log shall provide pertinent information such as, but not limited to:

1. Borehole number.

2. Borehole completion date.

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

4. Air loss or loss of returns.

5. Rock types (description of cuttings).

6. Measured void or caved and broken zone.

7. Depth to each water bearing zone.

8. Linear feet, size, type of casing.

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

Department Representative will aid in the interpretation of the borings, may be requested at any time during the course of the Contract.

No additional payment will be made for delivery of records, since delivery is included in Contract Item, “Mobilization and Demobilization.”

1.4 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 Representative.

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

Mobilization will be paid in the amount of forty percent (40%) of the unit price bid following complete mobilization.

Demobilization will be paid in the amount of sixty percent (60%) of the unit price bid following complete demobilization.

SPECIFICATION NO. 2: DRILLING ROTARY BOREHOLES

2.1 SCOPE

The work covered by this section consists of furnishing all labor, material, equipment, supplies and all necessary incidentals to drill boreholes at this site location. Work will include drilling one (1) exploratory pilot hole into the abandoned Lower Kittanning Coal Mine. The projected depth of each pilot hole is approximately 135’. Once the pilot hole has intersected suitable conditions at mine elevation, this hole will be reamended to accept final casing sizes. This work includes the following: drilling to accept eighteen-inch (18”) nominal Schedule 40 steel casing pipe, if loose unconsolidated overburden conditions warrant the use of the steel casing to facilitate drilling the fourteen-inch (14”) overburden casing; drilling to 60’ accommodate fourteen-inch (14”) Schedule 40 PVC casing pipe; installing the casing pipe and grouting the annulus to within fifteen feet (15’) of the surface; drilling to accommodate eight-inch (8") SDR17 Certa-Lok, or equivalent, casing pipe, installing the casing pipe and stage-grouting the annulus to surface through 130’ of rock, mined coal beds conditions to within five feet (5’) of the mine roof. The Contractor shall submit a stage-grouting plan for approval prior to commencing grouting.

Total depth of the borehole is approximately 135’ below ground level.

2.2 PROCEDURE

All work shall be done under the direction of the Department Representative. The work involves the drilling of a rotary borehole according to the Technical Specifications for the project area.

The depth of the borehole is an estimate. The termination depth of the borehole will be at the discretion of the Department Representative.

Drilling of the borehole shall be with non-percussion or percussion air-rotary drills at the location shown on the Project Drawings or as designated by the Department Representative. This does not preclude the use of churn drills for installing and handling casing pipe or reopening boreholes, if required.

The Department Representative will designate the location and order of drilling of the hole. The Contractor shall be responsible for determining the location of all underground and overhead utilities such as, but not limited to telephone, cable, sewer, gas, water and electric. Should the location of any utility prohibit the drilling of any borehole, the Contractor shall advise the Department Representative for possible relocation of said borehole. The Contractor shall not be paid for any borehole or part of any borehole that should puncture a utility.

The rotary drills shall be equipped with complete dust control systems or mechanisms to collect dust produced in the process of drilling and prevent the discharge of dust into the atmosphere. The dust control systems shall be of ample capacity to serve under all conditions. Drilling rigs shall be of sufficient size and capacity to carry on drilling operations in an efficient manner.

All precautions shall be taken by the Contractor to ensure that the hole is plumbed when drilling boreholes. A stabilizer, not less than ten feet (10’) in length and one inch (1”) less in diameter than the diameter of the bit, shall be attached to the cutting bit and stem.

The Contractor shall be required to drill boreholes through the rock strata with a drill bit sufficient in diameter to accommodate the specified borehole-casing pipe with a minimum 3.62” of annulus space for tremie-grout sealing to the requested target depth.

When an opening in a coal bed or other void is encountered, the Contractor shall probe the opening or void to determine its depth and condition. Payment for such probing will be as drilling at the specified diameter and at the same price per linear foot (L.F.) listed in the Contract Unit Price.

The Contractor shall keep and furnish to the Department Representative an accurate log of the completed borehole, which shall include, but is not limited to, the type and condition of the unconsolidated overburden (wash), rock strata and coal beds. A more detailed description of the information required for each borehole log is outlined in Contract Item, “Mobilization and Demobilization,” Section 1.3 Delivery of Records.

In the event the walls of the borehole begin to cave or barrel, the Contractor shall be required to either introduce Sodium Bentonite into the borehole or to attempt any other method the Contractor deems suitable to stabilize the borehole wall, providing it meets with the approval of the Department Representative.

Any borehole that may be lost or become unusable must be reopened or replaced at the expense of the Contractor. Any borehole that is lost or becomes unusable must be sealed at the Contractor's expense.

If additional boreholes are necessary, in the opinion of the Department Representative, the Contractor shall drill same at the price per linear foot listed in the Contract for similar size boreholes.

2.3 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 (L.F.) of holes actually drilled and accepted by the Department Representative, but only to the extent directed.

Payment will be made at the Contract Unit Price bid per linear foot (L.F.) for Contract Items, 2A) “Drilling Exploratory Pilot Hole (minimum 4.5”), 2B) “Drilling Rotary Borehole to Accommodate Eighteen-Inch (18”) Nominal Sch 40 Steel Casing Pipe,”

2C) “Drilling Rotary Borehole to Accommodate Fourteen-Inch (14”) Sch 40 PVC Casing Pipe, 2D) “Drilling Rotary Borehole to Accommodate Eight-Inch (8”) SDR17 Certa-Lok, or equivalent, Casing Pipe,” with minimum 3.62” annulus, which price and payment shall constitute full compensation for furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily complete this item of work.

SPECIFICATION NO. 3: FURNISHING AND INSTALLING CASING PIPE

3.1 SCOPE

The work covered by this section consists of providing all labor, material, equipment and incidentals required to furnish and install eighteen-inch (18”) Schedule 40 Steel casing pipe. Furnish, install and tremie-grout fourteen-inch (14”) Schedule 40 PVC casing pipe, and eight-inch (8”) SDR17 Certa-Lok, or equivalent, casing pipe into the borehole.

3.2 PROCEDURE

The Contractor shall furnish and install new Schedule 40 Steel and PVC well casing pipe in all boreholes, which shall be used for dewatering and monitoring purposes of a Designated Dangerous Impound. The Department Representative shall specify casing pipe size and type and shall approve all casing pipe before it is installed in the boreholes.

A. Eighteen-inch (18”) nominal diameter Schedule 40 Steel casing pipe shall be installed to fifteen feet (15’) below ground level (BGL).

B. Fourteen-inch (14”) diameter Schedule 40 PVC casing pipe shall be installed to 30’ below ground level (BGL). The annulus space shall be grouted from the bottom to within fifteen feet (15’) of ground level.

C. Eight-inch (8”) diameter SDR17 Certa-Lok, or equivalent, casing pipe, shall be installed in the boreholes from the surface to the designated depth and shall be securely anchored. The annulus space shall be stage grouted from the bottom of the casing to the ground surface (see Attachment 5). A grouting plan shall be submitted for department review and approval prior to starting the grouting process.

CERTA-LOK WELL CASING SPECIFICATIONS

The cost of grouting and of making a watertight seal shall be included in the price per linear foot(L.F.) for the specified diameter borehole casing pipe as listed in the Contract Unit Price.

3.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, for casing pipe will be made on the basis of the linear feet (L.F.) 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 (L.F.) for Contract Item, A. “Furnishing and Installing Eighteen-Inch (18”) Sch40 Steel Casing Pipe

B. “Furnishing and Installing Fourteen-Inch (14") Sch40 PVC Casing Pipe, Including Grouting,”

C. “Furnishing and Installing Eight-Inch (8") SDR17 Certa-Lok, or equivalent, Casing Pipe, Including Grouting.”

Which price and payment shall constitute full compensation for furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily complete this item of work.

SPECIFICATION NO. 4: EIGHT-INCH (8”) SDR17 PVC SEALING CAP

4.1 SCOPE

The work covered by this section consists of providing all labor, material, equipment and incidentals required to furnish and install eight-inch (8”) PVC sealing cap.

4.2 PROCEDURE

The Contractor shall furnish and install a new eight-inch (8”) PVC sealing cap. The sealing cap needs to be secured but also must be removable.

4.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made based on the installed sealing cap, but only to the extent directed and accepted by the Department Representative.

Payment will be made at the Contract Unit Price bid for Contract Item, Eight-Inch (“8") PVC Sealing Cap” on the Bid Form. The price and payment shall constitute full compensation for furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily complete this item of work.

SPECIFICATION NO. 5: PILOT BOREHOLE ABANDONMENT

5.1 SCOPE

The work covered by this section consists of furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily seal unsuitable boreholes as defined under this work item.

5.2 PROCEDURE

If a borehole is considered unsuitable for future monitoring use as determined by the Department Representative, the Contractor shall be required to seal each borehole in the following manner:

A. Upon completion of the borehole and acceptance by the Department

Representative, the Contractor inserts a plug of his choice, which is acceptable to the Department Representative, in the borehole a minimum of ten feet (10’) above the Lower Kittanning Coal seam or to a point selected by the Department Representative. In the event that significant quantities of water are encountered, the Contractor might be required to set the plug below the aquifer and build the seal from that elevation.

B. Contractor shall inject cement concrete into the plug until the injected cement concrete comes to the surface. Contractors may use additives or accelerants to reduce the cement concrete set-time when approved by the Department Representative.

C. Contractor shall stem the hole within one foot (1’) of the surface with sand, gravel, 2B stone or drill cuttings.

D. Contractor shall restore the surface to as good as or better than original condition.

Except with the permission of the Department Representative, the Contractor shall not abandon nor complete any borehole, or remove any casing or drilling equipment, without first affording the Department Representative the opportunity to obtain the position and the depth of the borehole to abandonment or completion and any other information which the Department Representative may require. No payment will be made for any borehole which has been abandoned by the Contractor before reaching the depth, elevation or condition specified, and no payment will be made for the sealing of the borehole in accordance with the specifications, unless the Department Representative approves and accepts the borehole as being completed. The Department Representative may, in his option, accept a borehole which fails to reach the required depth due to unusual subsurface conditions which, in his opinion, could not reasonably have been anticipated.

5.3 MEASUREMENT AND PAYMENT

Measurement, when accepted and approved for sealing boreholes, will be made on the basis of each borehole abandoned, but only to the extent directed and accepted by the Department Representative.

Payment will be made at the Contract Unit Price bid per borehole for Contract Item, “Pilot Borehole Abandonment” on the Bid Form. The price and payment shall constitute full compensation for furnishing all labor, material, equipment, supplies and all necessary incidentals required to satisfactorily complete this item of work.

SPECIFICATION NO. 6: STAND-BY TIME

6.1 SCOPE

The work item covered by this section is intended to address any delays in drilling in which a drill rig and crew are ordered by the Department Representative to stand idle.

6.2 PROCEDURE

When the Contractor is ordered by the Department Representative to delay the drilling of any borehole, the Contractor will be reimbursed for any such delays providing that the delays are the sole responsibility of the Department Representative and the delays are in excess of one-half (1/2) hour in duration.

Stand-by time shall 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 shall be considered the sole responsibility of the Contractor and shall be incidental to other items of work and no additional compensation will be allowed. No payment for stand-by time will be made for items of equipment other than a complete drill rig and crew in full operating condition.

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

6.3 MEASUREMENT AND PAYMENT

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

Payment will be made at the Contract Unit Price bid per hour for “Stand-by Time” and will be divided no finer than by one-half (1/2) hour increments, which price and payment shall constitute full compensation for the delay of a drill rig and crew.

SPECIFICATION NO. 7: INSPECTIONS

Ample opportunity shall be furnished at all times to the Department Representative for inspecting the work. If any imperfect work is performed at any time, the defects therein shall be remedied by the Contractor, at his expense, to the full satisfaction of the Department Representative. No drilling nor field-testing shall be done except in the presence of the Inspector or Department Representative, unless specific permission has been granted to the contrary. The presence of an Inspector, or the keeping of separate drilling records by the Department Representative, shall not relieve the Contractor of the responsibility for work specified in the Contract.