con3and6specs.pdf

PDF 41 KB Posted Jan 19, 2010

Attached to: RECOVERY - Drilling Investigation - Conewango Watershed Dam - Site 3 and 6 - Chautauqua County, NY
Solicitation number: AG-2C31-S-10-0001
Issued by: Department of Agriculture National Resources Conservation Service

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Technical Specifications

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File	Type	Posted
Abstract of Offers.pdf	PDF	Feb 4, 2010
Amend 2.pdf	PDF	Jan 27, 2010
Amend 1.pdf	PDF	Jan 21, 2010
Borrowareaasbuilt.pdf	PDF	Jan 21, 2010
Conewangosite6borings.pdf	PDF	Jan 21, 2010
SCA Wage Rates.txt	TXT text file	Jan 19, 2010
Request for Quotes.pdf	PDF	Jan 19, 2010
ScopeofworkdrillingCon3and6.pdf	PDF	Jan 19, 2010

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Technical Specifications

For

Geologic Investigation

Conewango Sites 3 and 6 Watershed Dams

Bates and Cherry Creek, New York

USDA Natural Resources Conservation Service The Galleries of Syracuse

441 South Salina Street, Suite 354 Syracuse, New York 13202-2450

TECHNICAL SPECIFICATIONS

GENERAL

1.1 ABANDONED BORINGS

Should the casing or drilling apparatus be removed from a bore hole, or should the hole be abandoned without permission of the Contracting Officer’s Representative (COR), or should a boring be started and carried to the depth required by the COR, but the Contractor fails to keep the complete and accurate logs of materials encountered or fails to furnish the COR the acceptable samples and cores, then the Contractor shall make an additional boring at a location selected by the COR and no payment shall be made for either the abandoned hole or any samples or cores obtained therein. The Contractor must assume the risk of encountering boulders or other obstacles and must drill through boulders and/or other such obstacles. If borings are abandoned in preference to drilling through the boulders and/or obstacles, or because of shattered or misaligned casing, the Contractor must put down additional borings adjacent to the abandoned borings and no payment will be made for the abandoned boring including any samples, cores or test data from the abandoned boring. No separate payment for augering, sinking casing, and/or taking samples there from shall be made if the hole is abandoned or lost before completion unless and solely to the extent that the COR considers that the augering, sinking of casing and taking of samples are of sufficient benefit to warrant payment.

1.2 LOGS AND RECORDS

The Contractor shall be responsible for keeping accurate logs and records of all explorations and field tests as specified and/or accomplished under the terms and in accordance with the specifications to this contract in a manner satisfactory to the COR. Upon completion of each exploration or test, the Contractor shall provide the COR an accurate copy of the driller's log and/or test record.

The logs and records shall include the following information as may be applicable:

a. Number, location, ground elevation when available, and depth of each test hole.

b. Vertical sequence, thickness, and description of materials encountered in each hole.

c. Soil and rock descriptions.

(1) Soils description (sand, silt, silty sand, etc.) firmness and moisture (dry, damp, moist, wet).

(2) Rock description type (shale, sandstone, granite, etc.), color, condition (fissured, etc.) and drilling characteristics (soft, medium, hard, very hard).

d. Height of fall and weight of hammer for drive samples and for advancing casing.

1.3 CARE OF WORK AREA

a. Care shall be taken to minimize damage to the work area. Clearing for access to drill hole locations or for any purpose shall be the minimum necessary to move required equipment. Live trees shall not be cut or damaged unless approved by the COR.

b. Trees for which removal is absolutely necessary shall be cut within 4 inches of the ground surface and shall be carefully downed without damage to adjacent trees or utilities.

c. Any stone walls damaged by the Contractor shall be repaired as directed by the COR.

d. Vehicles shall not travel on lawns, gardens, planted areas, and other areas unless approved by the COR. Plywood sheets may be required for placement beneath tracks /tires when crossing these areas.

e. Disturbance to ground cover and grade shall be the minimum necessary to complete the work.

During the work, all disturbed areas shall be protected to prevent erosion as directed by the COR.

f. All disturbed areas shall be vegetated and mulched as directed by the COR. Vegetative work shall consist of furnishing and applying the materials indicated below at the specified rates:

(1) For low maintenance areas: Application Rate Per 1,000 Sq. Ft Birdsfoot Trefoil 0.2 pound Tall Fescue 1.1 pound Redtop 0.1 pound 10-20-20 fertilizer 1 pounds Hay or Straw Mulch 100 pounds

(2) For lawn and high maintenance areas: Application Rate Per 1,000 Sq. ft

Creeping Red Fescue 1.0 pound Kentucky Blue Grass 1.0 pound Perennial Ryegrass 0.1 pound 10-20-20 Fertilizer 11 pounds Hay or Straw Mulch 100 pounds

The seedbed shall be prepared by:

(1) Loosening the soil by raking or disking to a minimum 2-inch depth.

(2) Raking or disking in the specified fertilizer.

1.4 SAFETY

a. The Contractor shall comply with OSHA, Part 1926, Construction Standards and Interpretations.

b. In addition to the requirements of OSHA Part 1926 and the NRCS Supplement. The Contractor shall also comply with Sections 2, 5, 6, and 7 of the Driller's Safety Manual published by the United States Water and Power Resources Service, in effect on the date of issuance of the invitation for bids. In case of conflict between OSHA Part 1926 and the Driller's Safety Manual, OSHA Part 1926 will prevail.

TECHNICAL SPECIFICATIONS

2. MOBILIZATION AND DEMOBILIZATION

2.1 SCOPE

This work consists of the delivery to and assembly at the site of the equipment, tools, and supplies required for the performance of the work; preparing for operation at the various drilling locations;

and removal of all equipment and supplies from the site upon completion of the work.

2.2 MOBILIZATION

Mobilization shall consist of delivering to the site all personnel, equipment, tools, materials, and supplies needed to perform the items of work. It shall include the assembly of the equipment in such manner that it is prepared to do the work at each of the drill hole locations designated by the Contracting Officer. Moving between holes shall be considered as a subsidiary to this item, and therefore, no separate payment shall be allowed for it. The Contractor may use other equipment to facilitate the work with the permission of the Contracting Officer. Delivery and use of this equipment shall be considered a part of mobilization or subsidiary to other items in the contract.

Delivery to the site of additional equipment and assembling thereof as the work progresses shall be considered as a part of mobilization whether or not such equipment has been specified as required.

No work shall commence until the required number of units and personnel completely mobilize at the site.

2.3 DEMOBILIZATION

Demobilization shall consist of the removal of equipment, tools, supplies, and Contractor's debris from the properties on which the work has been performed, and of the preservation of the worksite.

2.4 MAINTENANCE OF EQUIPMENT

The equipment and tools assembled for use during this contract must meet the capability requirements at all times. If any portion fails to meet such requirements, it must be repaired or replaced within a reasonable time as determined by the Contracting Officer. No additional payment shall be allowed for replacement of defective or inadequate equipment and tools. The Contracting Officer’s Representative shall be the final judge as to the adequacy of tools and equipment.

2.5 MEASUREMENT AND PAYMENT

The unit of measurement will be a lump sum quantity. Payment will be made at the contract lump sum price for 'Mobilization and Demobilization" and shall be considered full compensation for all material, labor, equipment and any incidentals necessary for mobilization and demobilization of operators, equipment, materials and supplies.

5.0 DRIVE SAMPLE BORING - CONTINUOUS

5.1 SCOPE

This specification includes advancing a boring for the purpose of sampling and testing the subsoil.

The sampling is intended to determine the thickness, arrangement and the various physical properties of the soil strata as they occur in situ. Standard penetration tests shall be performed according to ASTM D1586-99, Standard Test Method for Penetration Test and Split-Barrel Sampling of Soils to a depth determined by the COR.

5.2 EQUIPMENT AND SUPPLIES

Standard 24-inch long, 2 or 3-inch O.D. drive samplers with ball check valves shall be used as directed by the Contracting Officer. The drive shoe shall be of hardened steel and the cutting edge shall be maintained in good condition as required by the Government Representative.

The drive weight assembly to be used with the 2-inch O.D. drive sampler shall consist of a 140 lb.

+ 5 lb. weight, a driving head and a guide permitting a free fall of 30 inches. A 300 lb. + 10 lb.

drive weight assembly shall be used with the 3-inch O.D. sampler. The 300 lb. and 3-inch O.D.

sampler shall be used as directed by the COR.

Accessory equipment includes retaining baskets, labels, sample jars, sealing wax and other necessary supplies.

5.3 PROCEDURE

The boring shall be drilled to the depth required by the use of hollow stem augers, cutting or chopping bits, tricone bits, or other bits approved by the COR. Casing will be required where rock coring or special tests are to be performed. Generally, hollow stem augers shall be used to advance the borings. When casing is used, water ports in the approved bit shall be arranged such that there is no jetting action of the drilling fluid ahead of the bit. Bottom discharge bits or jetting through an open sampler and sampling at the desired elevation will not be permitted. With the sampler resting on the bottom of the hole it shall be driven into the subsoil in six-inch increments with a 140 lb.

hammer for a 24-inch total drive or to refusal. The number of blows required for each six-inches of penetration will be recorded by the driller.

5.3.1 CASING

Where required, borings shall be cased with a 3-inch minimum inside (I.D.) diameter flush joint casing. The casing shall be driven closely following the bit to prevent any overlying material from contaminating the sample. At no time shall the casing be driven beyond the sampling elevation.

Drilling fluid additives may be approved for use by the COR where no permeability or pressure tests are to be performed.

When casing is advanced by driving, the weight of the drive hammer shall be 300 pounds unless heavier hammers are authorized by the COR.

5.3.2 TESTS

Standard penetration tests will be performed in a continuous manner to a depth determined by the COR. Thereafter, samples shall be taken at five foot intervals or at every change in stratum, or as determined by the COR.

The sampler shall be raised to the surface and opened. In saturated silt and sand the drill rods shall be withdrawn carefully to prevent loosening of the material in the hole. Water level in the hole shall be kept at or slightly above the water table during the sampling operations.

5.3.3 SAMPLES AND CONTAINERS

If a sample is not recovered or is found unsatisfactory as to size or condition, a second attempt shall be made to obtain a satisfactory sample before advancing the boring to a lower depth.

Overdriving the spoon to ensure sample recovery will be permitted only upon approval by the Contracting Officer in each case.

The soil sample will be removed from the sampler and placed in a glass jar with white cap which will be closed with a moisture proof lid.

Each sample will be logged according to the Unified Soil Classification System and placed in a airtight sample jar without ramming. Each type of material from each sample will be placed in a separate container and labeled with the following information:

a . State

b. Location

c. Project name

d. Drill hole number

e. Depth

f. Type of sample

g. Blow count for each 6 inches of penetration

h. Length of recovery

Samples shall not be allowed to freeze and shall not be exposed to hot sunlight for long periods.

Samples shall be turned over to the COR.

5.3.4 DRILLER'S LOG

The Contractor will keep in a satisfactory manner and furnish the COR, upon completion of each drill hole, one copy of the original boring log. Two typed copies of the driller's log are required to be provided at completion of the work. The log shall include the following information:

a. Number, location, ground elevation and depth of each drill hole.

b. Vertical arrangement or sequence, thickness and classification of materials encountered in each drill hole.

c. Location, number and type of sampler for each sample taken.

d. Height of fall and weight of hammer for taking drive samples.

e. Number of blows required for each 6-inch penetration of sampler.

f. Length of sampling drive and length of sample recovered for drive sample.

g. Degree of natural moisture and compaction of sample materials by visual determination.

h. Depth or elevation ground water is encountered and remarks about sudden loss or gains occurring during the drilling or sampling.

i. Depth or elevation of ground water after completion of each hole and daily at the start of the work until water depth conditions have been established as approved by the Contracting Officer.

j. Notes, remarks and information as to incidents encountered during the drilling operation at each hole.

All depths and elevations are to be measured and recorded in feet and tenths of feet.

5.4 MEASUREMENT AND PAYMENT

The unit of measurement for payment shall be the number of linear feet drilled and/or sampled to the nearest 0.1 foot as logged by the COR.

Payment will be made at the contract unit price for "Drive Sample Boring- Continuous" and shall be considered full compensation for all labor, material, equipment, and any incidentals necessary to complete the work as specified herein; including driving and removing casing if required..

5.0 DRIVE SAMPLE BORING - @ 5 Ft. Intervals