OSM02(0385)101.1_Specifications.doc

OSM 02(0385)101.1

BID INVITATION

BROWNFIELD HOLLOW II

PROJECT NO. OSM 02(0385)101.1

WILKINSBURG BOROUGH

ALLEGHENY COUNTY

I. SCOPE OF WORK

The Department of Environmental Protection, Bureau of Abandoned Mine Reclamation, requires a contractor to conduct a subsurface core drilling investigation at 2007 Kendon Drive West, Pittsburgh, PA 15221. The purpose of the investigation is to determine whether damage to the structure is the result of mine subsidence and to determine the potential for future subsidence at this location. The Contractor shall furnish all labor, technical assistance, equipment, tools and material necessary to perform the contract tasks.

The work to be performed consists of drilling HQ or larger size core holes to the depth of an abandoned mine beneath the subject residence. The depth to the bottom of the coal is approximately eighty-five feet (85’) below the site as reported by the best available resources. The work will take place in the yard of the home. Some access to the holes is restricted to as little as five feet (5’) in width. Consideration should be given to the work site and the equipment mobilized should be consistent with site constraints. Rubber tired, truck mounted rigs will not be considered for this site.

Due to the nature of the work, it might be necessary to slightly modify the tasks while the work is being conducted. Such modifications could include: (1) relocation of boreholes; (2) deletion of some boreholes; (3) addition of boreholes in the vicinity of the work site; and (4) variation of the depth of the boreholes proposed for the work site.

The Contractor agrees to furnish all necessary labor, material, 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 Jon Smoyer at (814) 472-1884. Any questions concerning the contracting or bidding process should be directed to Phyllis Cocco at 814-472-1800.

1. CONTRACT REQUIREMENTS

The Contractor agrees to comply with Attachment A, Federal Requirements, and Attachment B, Steel Products Procurement Act and Trade Practices Act, as attached.

“Buy American Act” applies.

2. INSURANCE REQUIREMENTS

The Contractor shall purchase and maintain at its expense the following types of insurance, issued by companies acceptable to the Commonwealth:

A.

Workmen’s Compensation Insurance sufficient to cover all of the employees of the Contractor working to fulfill this contract.

B.

Comprehensive General Liability Insurance, including bodily injury and property damage insurance, to protect the Commonwealth and the Contractor from claims arising out of the performance of the contract. The amount of bodily injury insurance shall not be less than $500,000 for injury or death of persons per occurrence. The amount of property damage insurance shall not be less than $500,000 per occurrence.

C.

Automotive Liability Insurance, including bodily injury and property damage insurance, to protect the Commonwealth and the Contractor from claims arising out of the performance of the contract. The amount of bodily injury insurance shall not be less than $500,000 for injury or death of persons per occurrence. The amount of property damage insurance shall not be less than $500,000 per occurrence.

Such policy shall name the property owner(s) listed below and the Commonwealth as an additional insured. Prior to the commencement of work under this contract, the Contractor must provide the Commonwealth with current Certificates of Insurance. These Certificates shall contain a provision that coverage afforded under the policy shall not be cancelled or changed until at least thirty (30) days written notice has been given to the Commonwealth.

3. PROPERTY OWNER(S)

The following surface property owner(s) will be affected by this drilling project:

Denise Oliver-Taylor

Gwendolyn Q. Allen

2007 Kendon Drive West

2003 Kendon Drive West

Pittsburgh, PA 15221

Pittsburgh, PA 15221

4. CONTRACT TERM

The Contractor shall have forty-five (45) days to complete this work. The Contractor may coordinate with the Department to begin work any time after December 9, 2013 and the work must be completed before January 24, 2014.

5. CONTRACT QUANTITIES

The quantities herein are estimated only and may increase or decrease, depending upon the needs of the Department. Contractor shall be reimbursed at the unit price bid for actual work performed.

II. CONTRACT TASKS

1.

WORK SITE MOBILIZATION AND DEMOBILIZATION

1.1

SCOPE

The work covered by this section consists of the delivery to the work site of all equipment, material and supplies, removal from the site of all equipment after the completion of work, delivery of records, clean-up of the site and final inspection by the Department’s Representative.

1.2

PROCEDURE

Mobilization shall consist of the delivery to the work site of all equipment, material and supplies to be furnished by the Contractor. The complete assembly should be in satisfactory working order of all such equipment on the job and the satisfactory storage at the site of all such material and supplies. Moving between boreholes and setups at borehole locations included under the Contract shall be incidental to the other appropriate Contract Items and no separate payment will be made.

Demobilization shall consist 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 shall be subject to approval by the Department’s 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. Easements from property owners will be obtained by the Department or its designated representative.

Every effort shall be made to minimize damage incidental to site access and the drilling operations. Accessing the holes by rubber tracked equipment moved on pads or plywood is preferred.

The Contractor shall be liable to the property owners for any damage to vegetation 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.

1.3

DELIVERY OF RECORDS

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

A.

Two (2) typed copies of each borehole log, not later than seven (7) days after completion of all of the boreholes. Each log shall provide pertinent information such as, but not limited to:

1.

Borehole number.

2.

Borehole completion date.

3.

Elevation of surface.

4.

Beginning and end of each core run and percent recovery.

5.

Overburden/spoil types, casing depth, reaming depth, rock types, void depths and thicknesses.

6.

Rock quality designation.

B.

Copies of any other records kept by the Contractor, which in the opinion of the Department’s Representative, will aid in the interpretation of the core borings at any time requested during the course of the Contract.

No additional payment will be made for delivery of records, since delivery is included in Contract Item, “Work Site 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’s Representative.

Payment will be made at the Contract Unit Price bid for Contract Item, “Work Site 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 these items of work.

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

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

2.

OVERBURDEN DRILLING

2.1

SCOPE

The work covered by this section consists of furnishing all labor, material, equipment, supplies and all necessary incidentals required to drill borings through the overburden.

2.2

TEST BORING LOCATIONS

All test boring sites will be exactly located in the field by the Department’s Representative and the Commonwealth will furnish the surface elevations of each borehole. It is the Contractor's responsibility to ascertain exact locations of utilities from the appropriate utility company and to verify all measurements in order to insure that all borings are made at locations which will not interfere with, or harm existing surface or subsurface utilities. The Contractor shall notify the Department’s Representative when a conflict occurs. The Contractor shall bear sole responsibility for any damage to existing utilities resulting from his operations.

2.3

PROCEDURE

The Contractor shall make borings into earth and material other than rock for the purpose of penetrating to the top of solid rock and/or for ascertaining the depth and thickness of overburden material. Sampling of overburden material will not be necessary. The Contractor may decide what method to use in approaching rock and the choice of casing type will be that of the Contractor. If the Contractor penetrates weathered bedrock to any depth, the depth and thickness of said weathered bedrock shall be carefully documented.

2.4

MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made on the basis of the linear feet (L.F.) of borehole actually drilled in overburden, but only to the extent directed by the Department’s Representative. No separate payment will be made for coring or other methods of advancing overburden drilling through boulders or other obstructions unless said obstructions are cored and greater than five feet (5’) in thickness, in which case payment will be made as Core Drilling.

Payment will be made at the Contract Unit Price bid per linear foot (L.F.) for Contract Item, “Overburden Drilling,” 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.

3.

HQ SIZE CORE DRILLING

3.1

SCOPE

The work covered by this section consists of furnishing all labor, material, equipment, supplies and all necessary incidentals required to drill core borings through rock and mined coal beds.

3.2

EQUIPMENT AND SUPPLIES

Equipment for core drilling shall include hydraulic feed core drilling machinery of a type or types approved by the Department’s Representative, complete with pressure gauge for measuring down pressure, water pressure gauge and relief valve assembly, together with all other accessories for taking complete and continuous HQ rock cores. In no event will a core size less than HQ be acceptable.

Supplies for core drilling shall include all casing, drill rods, core barrels, diamond coring bits, reaming shells, piping, pumps, water, tools, power, all boxes and containers required for core samples and all other items not included herein, but required for satisfactory performance of required work. Bits shall be set with the proper size stones for the kind of rock being cored.

All equipment and methods to be used by the Contractor shall be subject to approval by the Department’s 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 to obtain the desired end results.

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

Water for the drilling will be the responsibility of the Contractor. No separate payment will be made for obtaining water.

3.3

PROCEDURE

The Contractor shall be responsible for drilling plumb boreholes. At the elevation where the test boring encounters rock, the casing shall be seated tightly in the rock. In coring rock (including shale and indurated clays), the Contractor shall operate his drills at such speeds, feeds and water pressure as will insure maximum core recovery. During the initial run and where soft or broken zones in rock are anticipated, the Contractor shall limit the length of “runs” to five feet (5’) or less in order to reduce core loss and keep core disturbance to a minimum. The individual drill runs in the coring operation shall in no case be in excess of ten feet (10’), unless otherwise approved by the Department’s Representative. The Contractor shall frequently check the condition of the core lifter, reaming shell and rotation of the inner barrel to avoid any grinding of the core. Whenever blockage of the core barrel occurs, the “run” shall be terminated immediately and the core barrel shall then be removed from the borehole and the recovered core placed in the core box. Prior to placing the core into core boxes, the Contractor shall lay the core out on a bench or other suitable place for inspection by the Department’s Representative.

The Contractor shall insure a minimum core recovery of ninety-five percent (95%) since high recovery is considered necessary for any proper interpretation of the subsurface conditions. When a “run” is made which results in complete core loss, the tools shall be checked for damage or malfunction and a second attempt made to recover the material by coring an additional few inches. If there is still no recovery or very poor recovery because the material has the characteristics of soil, overburden, or decomposed rock, the borehole shall be advanced by driving a split spoon sampler.

Failure to comply with the foregoing procedure, when ample warning of unusual subsurface conditions have been received in advance, shall constitute justification for the Department to require redrilling, at the Contractor's expense, of any boring from which the core recovery is unsatisfactory. Since the function of core boring includes determination of the width, orientation, extent and spacing of rock fractures, the Contractor shall exercise particular care in recording water losses, rod jerks and other unusual coring experiences, which supplementing the core record will yield information pertaining to the nature and extent of the fracturing.

3.4

LOGS

The Contractor shall keep accurate logs and records of all core borings which shall include the following information:

A.

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.

B.

Size and depth of casing and size and type of drilling tools used to advance the borehole.

C.

Depth of top and bottom of each run.

D.

Total length of core recovered plus the RQD for each run.

E.

Color changes in drill-water returned.

F.

Depths at which sudden losses or gains of drill-water return occur and estimated quantities involved.

G.

Visual classification of rock, including color, grain size, and inclination of beds or layers as measured from the horizontal.

H.

Nature and extent of fracturing of the rock cored, as determined by a field description of recorded core and the “feel” of the drill during the coring.

I.

Depth of top of firm or fresh rock and all other contacts between dissimilar materials.

J.

Location of soft zones, voids, or “break-through,” as indicated by rod chatter or change in the rate of penetration.

K.

Depth of water at completion of borehole and where possible after twenty‑four (24) hours.

L.

Notes, remarks and information on pertinent incidents occurring during drilling operations.

3.5

CONTAINERS

Longitudinally partitioned wooden core boxes shall be used for all rock cores. As many boxes as may be required shall be used in submitting each rock core or group of cores. Core boxes, including partitions, shall be substantially constructed of dressed lumber or other approved material. Core boxes shall be completely equipped with all necessary partitions, covers, hinges, spacer blocks, hooks and eyes for holding down the cover, complete identification and other accessories.

All cores shall be arranged neatly in the partitioned boxes, in a sequence consistent with that in which they were drilled. Facing the open box, the cores shall be arranged in descending sequence, beginning with the left end of the partition nearest the hinges and continuing into other partitions, from left to right. Wood spacers shall be inserted at beginning and end of each run and depths shall be shown on the blocks. If voids are encountered, a spacer block shall be inserted, on which is clearly noted that a void occurred and the depth to the top and bottom of the void. In cases where split tube drive samples are taken of gob or other refuse contained in a mined coal bed, the sample jars containing the sample shall be placed into the core box at the depth that the mined coal bed occurred. Spacer blocks will be placed above and below the interval. The same procedure shall apply when split tube drive samples are taken at intervals other than coal beds, at the direction of the Department’s Representative.

During the course of the drilling, the Contractor shall have the responsibility for storing the cores/core boxes and shall take adequate precautions to protect the cores from mechanical damage as well as from extreme temperature changes. Once recovered and cleaned, the core shall not again be allowed to become wet. The Contractor has the responsibility to have all project core on the work site during normal work hours for logging and review by Department personnel.

After drilling is completed, the cores/core boxes shall be delivered to the Department of Environmental Protection, Bureau of Abandoned Mine Reclamation Garage, 310 Industrial Park Road, Ebensburg, PA 15931-4119.

3.6

SEALING BOREHOLES

At the direction of the Department’s 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’s Representative, the Contractor inserts a plug of his choice, which is acceptable to the Department’s Representative, in the borehole a minimum of ten feet (10’) below the overburden/rock interface or below the bottom of the casing, whichever is deeper, or to a point selected by the Department’s 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.

A minimum of ten feet (10’) of cement concrete is placed on top of the plug and allowed to set for twenty-four (24) hours. Additives to accelerate the curing period may be used, when approved by the Department’s Representative.

C.

The casing is withdrawn and the borehole is stemmed to within one foot (1’) of the surface with sand, gravel, 2B stone, drilling cuttings or refuse material. The Contractor may choose to seal the overburden portion of the hole with cement concrete and remove the drill cuttings from the work site.

D.

In the event the casing cannot be recovered, it shall be cut off eighteen inches (18”) below the ground surface and the borehole shall be sealed as indicated in the preceding items 1, 2 and 3.

E.

The top one foot (1’) or eighteen inches (18”) of the borehole (if casing cannot be recovered) shall be filled with topsoil or pavement material equivalent to the existing pavement or concrete material, if the borehole is in a paved or concrete surface.

F.

The surface will be restored to as good as or better than original condition. All extra drill cuttings will be removed from the site.

G.

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

3.7

ABANDONED BORINGS

Except with the permission of the Department’s Representative, the Contractor shall not abandon nor complete any boring or remove any casing or drilling equipment, without first affording the Department’s Representative the opportunity to obtain the position and the depth of the boring to abandonment or completion and to secure samples of material already penetrated and any other information which the Department’s Representative may require.

No payment will be made for any boring which has been abandoned by the Contractor before reaching the depth, elevation or condition specified, unless the Department’s Representative approves and accepts the boring as being completed. Any boring abandoned by the Contractor without the Department’s Representative's approval shall be sealed at the Contractor's expense in accordance with Section 3.7. The Department’s Representative may, at his option, accept a boring which fails to reach the required depth due to an unusual obstruction, which, in his opinion, could not reasonably have been anticipated.

3.8

MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made on the basis of the linear feet (L.F) of boreholes actually cored into rock and coal beds, but only to the extent directed by the Department’s Representative.

Payment will be made at the Contract Unit Price bid per linear foot (L.F.) for Contract Item, “HQ Size Core Drilling,” 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.

4.

FURNISHING AND INSTALLING PLASTIC AND/OR STEEL CASING PIPE

4.1

SCOPE

The work covered by this section consists of furnishing and installing three inch (3”) inside diameter casing pipe. The three inch (3”) inside diameter casing pipe is typically used in placing TV camera equipment in the corehole for observation of a mined-out void, but may also be used for future grouting of the mine void for subsurface stabilization purposes. The TV camera equipment, its operation and any borehole monitoring will be the responsibility of the Department.

4.2

PROCEDURE

The Contractor shall furnish and install new plastic or new/acceptable used steel three-inch (3”) inside diameter casing pipe. Plastic casing pipe shall be Schedule 40 with threaded flush-joint couplings. The Department’s Representative shall approve all casing pipe before it is installed in the borehole. The casing pipe shall be installed in the corehole as designated by the Department’s Representative from the surface, flush or with standpipe, to the roof of the desired void or to the elevation specified.

When directed by the Department’s Representative, the Contractor shall cover completed, cased boreholes with temporary “slip-fit” or “screw top” caps/covers according to the type of casing pipe installed. The caps/covers are meant to protect the borehole from surface traffic and also serve to prevent unauthorized access. The cost of furnishing and installing “slip-fit” or “screw top” casing caps/covers shall be incidental to the Contract Item, “Furnishing and Installing Plastic and/or Steel Casing Pipe.”

The Department’s Representative may require that casing for selected boreholes be left in place to permit the Department to use the borehole for continued monitoring or injection purposes. All casing left in place shall be securely grouted, equipped with a threaded top, a screw cap and/or plug as approved by the Department’s Representative. The cost of grouting and furnishing/installing threaded tops, screw caps and plugs shall be incidental to the Contract Item, “Furnishing and Installing Plastic and/or Steel Casing Pipe.” The length and depth to the bottom of the casing shall be recorded in the drilling log.

4.3

MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, will be made on the basis of the linear feet (L.F.) of casing pipe of the diameter and type specified actually furnished and installed and left in place, but only to the extent directed by the Department’s Representative.

Payment will be made at the Contract Unit Price bid per linear foot (L.F.) for Contract Item, “Furnishing and Installing Plastic and/or Steel Casing Pipe,” 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.

5.

RESTORATION OF BOREHOLES

5.1

SCOPE

The work covered under this section consists of providing all labor, material, equipment and other incidentals necessary to restore the area surrounding each borehole and the access route to each borehole to a condition equal to or better than that which existed prior to the start of work. The work included in this section is considered discretionary and must be directed, approved and accepted by the Department’s Representative since clean-up and restoration is considered incidental to and included in Contract Item, “Work Site Mobilization and Demobilization.”

5.2

PROCEDURE

Restoration includes, but is not limited to repairing or replacing any sidewalks, fences, lawns (including landscaping with topsoil) and other improvements to the property which may have been damaged or removed as a result of the work, but only to the extent directed, approved and accepted by the Department’s Representative.

5.3

MEASUREMENT AND PAYMENT

Measurement, when accepted and approved, for restoration of boreholes at the specified locations, will be made on the basis of 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 of Boreholes,” 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. No payment will be made for restoration of boreholes that have not been directed, approved and accepted by the Department’s Representative since clean-up and restoration is considered incidental to and included in Contract Item, “Work Site Mobilization and Demobilization.”

6.

INSPECTIONS

Ample opportunity shall be furnished at all times to the Department’s 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’s Representative. No drilling or field testing shall be done except in the presence of the inspector or Department’s 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’s Representative shall not relieve the Contractor of the responsibility for work specified in the Contract.