Technical Specification for Drilling Construction and ...
Transcript of Technical Specification for Drilling Construction and ...
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 i
TABLE OF CONTENTS
Page
1.0 GENERAL ............................................................................................................................. 1 1.1 Certification ............................................................................................................................. 1
1.2 License ..................................................................................................................................... 1
1.3 Permits ..................................................................................................................................... 1
1.4 Drilling Method ....................................................................................................................... 1
1.5 Background .............................................................................................................................. 1
2.0 MATERIALS .......................................................................................................................... 2 2.1 Conductor Casing .................................................................................................................... 2
2.2 Blank HSLA Steel Casing ....................................................................................................... 2
2.3 Louvered HSLA Casing ........................................................................................................... 2
2.4 Gravel Pack .............................................................................................................................. 2
2.5 Bentonite Seal .......................................................................................................................... 2
2.6 Bentonite Grout Slurry ............................................................................................................. 2
2.7 Surface Seal ............................................................................................................................. 3
2.8 Drill Water ............................................................................................................................... 3
3.0 CONSTRUCTION REQUIREMENTS .................................................................................... 3 3.1 General ..................................................................................................................................... 3
3.2 Containment of Waste Fluids and Materials ............................................................................ 4
3.3 Daily Logs and Records ........................................................................................................... 4
4.0 SUPPLY WELL REQUIREMENTS ........................................................................................ 4 4.1 Mobilization and Demobilization ............................................................................................ 4
4.2 Conductor Borehole, Casing and Surface Seal ........................................................................ 4
4.3 Borehole Drilling ..................................................................................................................... 5
4.4 Blank HSLA Steel Casing and Installation .............................................................................. 5
4.5 Louvered HSLA Steel Casing and Installation with End Cap ................................................. 5
4.6 Gravel Pack and Installation .................................................................................................... 5
4.7 Bentonite Seal and Installation ................................................................................................ 6
4.8 Bentonite Grout Slurry and Installation ................................................................................... 6
4.9 Airlift Development ................................................................................................................. 6
4.10 Pump Development .............................................................................................................. 7
4.11 Aquifer Testing .................................................................................................................... 7
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 ii
4.12 Video Survey ........................................................................................................................ 8
4.13 Plumbness and Alignment .................................................................................................... 8
4.14 Performance of Contractor ................................................................................................... 8
5.0 METHOD OF MEASUREMENT ............................................................................................. 9 6.0 BASIS OF PAYMENT........................................................................................................... 9
FIGURES
Figure 1 Approximate Supply Well Location Map Figure 2 Sentinel School Supply Well Conceptual Design Figure 3 Sentinel School Supply Well Estimated Subsurface Geology
APPENDIX
Appendix A Bid Schedule 1, Sentinel School Supply Well Cost Estimate
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 1
1.0 GENERAL
These Technical Specifications describe the drilling, construction and testing of one potable supply
well to be provided by the drilling contractor (Contractor) for Sunrise Engineering Inc (Engineer). The
location of the new well is shown on Figure 1, Approximate Supply Well Location Map.
The work for this project shall include furnishing all materials, equipment and personnel for
constructing one six-inch-diameter cased well installed to a depth of approximately 550 feet in
accordance with Figure 2, Sentinel School Supply Well Conceptual Design. The work shall include
performing development and aquifer testing of the well. The work shall be done in accordance with
the requirements of these specifications and as directed by ATC Group Services LLC
(Hydrogeologist). The Engineer is defined as the representative for SEI. The Contractor shall prepare
a cost estimate for the work by completing all items in Appendix A, Bid Schedule 1, Sentinel School
Supply Well Cost Estimate.
1.1 Certification
The Contractor shall certify that the equipment, personnel, and procedures proposed for the work
are adequate to successfully complete the supply well as specified herein.
1.2 License
The drilling Contractor shall be licensed to drill wells in the State of Arizona. The drilling
Contractor shall hold a current Arizona Well Driller’s License issued by the Arizona Department
of Water Resources (ADWR) in the applicable drilling category. The drilling Contractor shall also
hold a current Arizona Registrar of Contractor License, Type A, A-4, A-16 or L-53. The Contractor
shall provide SEI copies of these licenses prior to the start of the project.
1.3 Permits
The Hydrogeologist shall coordinate with the Engineer to obtain the Notice of Intent (NOI) to Drill
permit from ADWR. The Hydrogeologist will submit the NOI and fee.
1.4 Drilling Method
Mud rotary is the selected drilling method for this project. Any other methods offered for this work
are subject to approval by the Engineer and Hydrogeologist.
1.5 Background
The Sentinel School, in Sentinel, Arizona requires a potable supply well. The water demand is
estimated at 30 gallons per minute (gpm). According to information from the ADWR files, the
depth to groundwater is approximately 216 feet. Local well logs indicate penetration of a thin
surface layer of fine silt and hard caliche up to 30 feet thick, underlain by hard dark volcanic rock
down to approximately 150 feet, underlain by interbedded sand, silt, and clay, as indicated on
Figure 3, Sentinel School Supply Well Estimated Subsurface Geology.
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 2
2.0 MATERIALS
2.1 Conductor Casing
The 16-inch diameter blank conductor casing shall be new low carbon steel (LCS) manufactured
in accordance with the Arizona Administrative Code (A.A.C.) A53 Grade B manufacturing
standard. The blank casing shall comply with the ADWR Rule R12-15-811 for Minimum Well
Construction Requirements.
2.2 Blank HSLA Steel Casing
The HSLA steel casing shall be new having a nominal 6-inch inside diameter, and 0.250” wall
thickness. The blank casing shall comply with the ADWR Rule R12-15-811 for Minimum Well
Construction Requirements.
2.3 Louvered HSLA Casing
The louvered HSLA steel casing shall be new factory louvered casing having a nominal 6-inch
inside diameter, and 0.250” wall thickness. The bottom end cap shall consist of the same type of
material. The louvered slot size is 0.050-inches. The screened casing shall comply with the
A.A.C. R12-15-811 for Minimum Well Construction Requirements.
2.4 Gravel Pack
The gravel pack shall consist of clean, well-rounded grains that are smooth and uniform. The
gravel pack material shall be siliceous in composition. The gravel pack shall consist of hard,
rounded particles with an average specific gravity of not less than 2.5 grams per cubic centimeter.
Not more than one percent, by weight, of the material should have a specific gravity of 2.25 or
less. The gravel shall contain no more than two percent, by weight, of thin, flat or elongated
pieces (pieces in which the largest dimension exceeds three times the smallest dimension). The
gravel shall be free of shale, mica, clay, sand, dirt, loam and organic impurities of any kind and
shall contain no iron or manganese, in any form or quantity that will adversely affect the water
quality. The gravel pack grain size must meet an 8-12 sieve analysis based on U.S. Standard
Sieves.
2.5 Bentonite Seal
The bentonite seal (pellets) shall be composed of high swelling sodium montmorillonite clay and
not be larger than ¾-inch diameter.
2.6 Bentonite Grout Slurry
The bentonite grout slurry will act as a formation stabilizer in the annular space between the
borehole and 6-inch diameter casing installed above the bentonite seal. The slurry shall have a
minimum of 15 percent solids by weight grout density of 9.2 pounds per gallon.
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 3
2.7 Surface Seal
The sand-cement grout surface seal shall consist of Portland cement conforming to ASTM
Standard C150, Type I or II, sand and potable water. No more than six gallons of water shall be
mixed per each 94-pound sack of cement. Calcium chloride may be used as a curing accelerator
during installation of the surface casing only, but shall not exceed more than two percent of the
total volume of sand-cement.
2.8 Drill Water
The Engineer will coordinate with the Contractor to supply drill water from a nearby location.
3.0 CONSTRUCTION REQUIREMENTS
3.1 General
All materials and each part or detail of the work shall be subject to inspection by the
Hydrogeologist. The work shall be conducted under the direction of the Hydrogeologist.
Engineering data covering all equipment and fabricated materials, which will become a
permanent part of the work under this contract, shall be submitted to the Hydrogeologist.
The Contractor shall be responsible for the preservation of all public and private property,
including the landscape, which shall be protected carefully from disturbance or damage. Because
the drill site is located at a school, the Contractor shall provide and install fencing around the site
to ensure that the site and all associated equipment is secure.
All litter and debris shall be cleaned up daily and disposed off-site by the Contractor. Plastic tarps
shall be placed under all drilling and support equipment during the entire time the equipment is
onsite to protect the site against oil or hydraulic fluid spills or leaks.
The Contractor shall prepare and rough grade the site as necessary to perform the work. The
Contractor shall neatly pile the drill cuttings at the site as directed by the Hydrogeologist. The
Contractor shall neatly spread the drill cuttings in an area subject to approval by the
Hydrogeologist. After completion of drilling, installation and testing of the well, the Contractor
shall remove all debris associated with the work.
The Contractor shall be responsible for maintaining access and dust control. The Contractor shall
not be entitled to additional compensation or an extension of contract time for any delays to the
work because of the Contractor’s failure to provide and maintain the well site, access to the well
site and dust control.
The drilling, installation and completion of the well shall comply with the ADWR Statutes and
Rules Governing Minimum Well Construction Standards and the Licensing of Well Drillers (2017).
The Contractor shall submit a copy of any drilling fluids or additives to the Hydrogeologist for
review and approval before they are used. This shall include copies of the Safety Data Sheets
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 4
describing all of the drilling additives to be used during drilling. No materials shall be introduced
into the borehole that may impair use as a potable water supply.
3.2 Containment of Waste Fluids and Materials
The Contractor shall be responsible for the handling and appropriate disposal of all fluids and
materials removed from the borehole during the drilling, development and testing of the borehole.
The Contractor shall contain all waste fluids and materials on the site through the utilization of
portable containers during all aspects of drilling and development. These containers shall be of
sufficient size to hold the drill fluid and all materials (fluids and solids) removed from the borehole.
3.3 Daily Logs and Records
The Contractor shall keep accurate and legible daily logs and records of all drilling activities,
showing all geologic materials encountered during drilling, the depth at which changes in
formation occur and all difficulties or unusual conditions encountered. The contractor shall submit
an electronic copy of each log on a daily basis via email to the Hydrogeologist. The Contractor is
also responsible for completing and submiting the Well Driller Report and Well Log (Form 55-55)
to ADWR.
The Contractor shall collect and preserve for the Hydrogeologist, one set of cutting samples
collected at five-foot increments from initiation of drilling to the bottom of the borehole estimated
at 550 feet. The samples shall be placed in cloth sacks furnished by the Contractor, which shall
be marked by the Contractor with the well identification and the depth interval represented.
4.0 SUPPLY WELL REQUIREMENTS
4.1 Mobilization and Demobilization
The Contractor shall furnish and maintain, in safe and efficient working condition, all equipment
necessary to perform the specified work, including a drill and/or pump rig capable of performing
the specified operations to the specified depths, and auxiliary equipment as specified or required
to complete the described tasks that includes development and testing. This project consists of
one mobilization and demobilization to the site to complete the work associated with drilling,
construction and testing of the supply well described in these technical specifications.
Mobilization and demobilization shall be paid as a lump sum (LS); (Bid Schedule 1, Item 1).
4.2 Conductor Borehole, Casing and Surface Seal
The conductor borehole shall have a nominal 20-inch diameter advanced to a depth of 20 feet
below ground surface (bgs) to accommodate installation of the 16-inch diameter conductor
casing. The Contractor shall ensure the conductor casing is plumb and centered in the borehole.
The Contractor shall place a sand cement grout surface seal to completely fill the annular space
between the conductor casing and the wall of the borehole to the ground surface meeting the
minimum ADWR surface seal requirements (A.A.C. R12-15-811). The method of installation is
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 5
subject to approval by the Hydrogeologist. The Contractor shall allow sufficient time for the
surface seal to cure before continuing with advancing the borehole. The conductor borehole,
casing and surface seal shall be paid as a lump sum (Bid Schedule 1, Item 2).
4.3 Borehole Drilling
After the conductor casing and surface seal has been installed, the Contractor shall drill a nominal
12-inch diameter borehole to a depth of approximately 550 feet below ground surface (bgs).
During borehole drilling, the Contractor shall collect drill cutting samples at five-foot intervals
and place the samples in cloth bags for use by the Hydrogeologist. When the borehole reaches
the anticipated depth of 550 feet, the Hydrogeologist will finalize the well design based on the drill
cuttings and provide a copy of the design to the Contractor within 24 hours of borehole
completion. Drilling of the borehole shall be paid by the lineal foot (LF); (Bid Schedule 1, Item 3).
4.4 Blank HSLA Steel Casing and Installation
The Contractor shall provide and install approximately 402 feet of new 6-inch diameter, HSLA
steel casing as shown on Figure 2. The final position of the blank casing will be determined from
the drill cutting samples. The blank HSLA casing and installation shall be paid by the lineal foot
LF (Bid Schedule 1, Item 4).
4.5 Louvered HSLA Steel Casing and Installation with End Cap
The Contractor shall provide and install approximately 150 feet of new 6-inch diameter, louvered
HSLA steel casing as shown on Figure 2. The final position of the screened casing will be
determined from the drill cutting samples. The Contractor shall provide and install an end cap,
consisting of the same type of material as the well casing on the bottom of the 6-inch louvered
casing. The Contractor shall install casing centralizers, fabricated from HSLA steel, attached to
the lower portion of the louvered casing. For bid purposes, estimate centralizers at 40-foot
intervals. The HSLA casing, end cap and installation shall be paid by the LF (Bid Schedule 1,
Item 5).
4.6 Gravel Pack and Installation
The Contractor shall provide and install a gravel pack in the annular space between the borehole
and 6-inch diameter casing from approximately 300 to 550 feet (Figure 2). To minimize
contamination, the gravel pack shall be delivered to the site directly from the supplier in sealed
bags. Gravel material shall be contained and temporarily stored onsite in such a manner that will
prevent contamination of the material prior to installation. For bidding purposes, placement of the
gravel pack is shown on Figure 2. The gravel pack shall be installed from the land surface at a
moderately slow rate through a tremie pipe or by the controlled pour method. The technique for
placing of the gravel must be a continuous routine of adding enough gravel to fill the space
between the borehole wall and the HSLA well casing. The Contractor shall measure and record
the top of the gravel pack at approximate 20-foot intervals during the installation process. Excess
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 6
gravel will be judged as an indication of voids in the gravel envelope and corrective measures
shall be taken at the Contractor's expense. For bidding purposes, assume using gravel consisting
of a 8-12 sieve size to accommodate 0.050 inch slot size. The estimated volume, based on a
length of 250 feet of gravel pack, including 30 percent loss, is estimated at approximately 191
cubic feet. The gravel pack and installation shall be paid by the cubic foot (CF); (Bid Schedule 1,
Item 6).
4.7 Bentonite Seal and Installation
Once the gravel pack has been emplaced, the Contractor shall install a bentonite seal on top of
the gravel pack estimated from 295 to 300 feet logs (Figure 2). Based on the 5-foot length and
30 percent loss, the bentonite seal quantity is estimated at 4 CF. The bentonite seal may be
installed by the controlled pour or tremie pipe method. The Contractor shall allow sufficient
hydration time before continuing work. The Contractor shall measure and record the top of the
bentonite seal before installing the bentonite grout slurry. The bentonite seal and installation shall
be paid by the CF (Bid Schedule 1, Item 7).
4.8 Bentonite Grout Slurry and Installation
The Contractor shall place a bentonite grout slurry to completely fill the annular space between
the nominal 12-inch diameter borehole and the 6-inch diameter blank casing to the ground surface
(Figure 2). The method of installation is subject to approval by the Hydrogeologist. Based on the
295 foot length and 30 percent loss, the bentonite grout slurry quantity is estimated at 226 CF.
The Contractor shall not allow any of the bentonite grout slurry to enter the 6-inch diameter casing.
The bentonite grout slurry and installation shall be paid by the CF (Bid Schedule 1, Item 8).
4.9 Airlift Development
The Contractor shall develop the well to remove drill cuttings and fine sediments using the airlift
and swab development method. The Contractor shall provide all equipment, appropriate amount
of compressed air and booster equipment, personnel, fuel and other materials to conduct airlift
development of the well. Airlift development begins once groundwater is airlifted to the surface
and ends when the air is turned off. Airlift development time does not include setting and removal
of the downhole piping or any equipment failure or replacement. The Contractor shall start airlift
development at the bottom of the well and gradually raise the dual-wall pipe to remove fluid from
the well. The duration of airlift development will be determined by the Hydrogeologist but is
estimated at four hours. Additional airlift development is subject to approval by the
Hydrogeologist. Any material accumulated in the well as a result of airlift development shall be
removed by the Contractor. Airlift development will be paid by the hour (HR); (Bid Schedule 1,
Item 9).
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 7
4.10 Pump Development
The Contractor shall provide all equipment, personnel, installation and materials to perform pump
development of the new well. The Contractor shall install the testing equipment that includes a
centrifugal sand tester installed on the discharge line of the pump for the purpose of determining
the amount of sand being produced by the well. Pump development begins once groundwater is
pumped to the surface and ends when the pump is shut down. Pump development time does not
include setting and removal of the downhole equipment or any equipment failures or replacement.
The Contractor shall pump-develop the well for a period not to exceed four hours unless directed
by the Hydrogeologist. The Contractor shall start at a low discharge rate and slowly increase the
pumping rate in steps as instructed by the Hydrogeologist. The Contractor is responsible for
collecting water level drawdown, discharge rate and sand production at 30 minute intervals during
pump development.
It is possible that the water produced during pump development may be discharged onto the
nearby grass landscaping, though some may need to be contained within portable containers.
The Contractor shall supply and install approximately 200 feet of temporary discharge piping.
The temporary discharge piping shall be correctly sized and be able to direct a minimum flow of
70 gpm of groundwater from the well. The position of the discharge pipe is subject to approval
by the Hydrogeologist. The Contractor shall also provide bales of hay to help reduce erosion due
to the water discharging from the pipe. The Contractor shall install a test pump, electric cable
and column pipe with a check valve in the well equipped with a one 1.25-inch diameter PVC
sounding tube to a depth of approximately 500 feet below the land surface. The test pump shall
be powered by a diesel engine driven generator equipped with a variable frequency drive (VFD)
and submersible pump having the capability of discharging up to 70 gpm. The pump equipment
shall be capable of variable discharge rates as indicated from one Contractor installed flowmeter.
The flowmeter shall indicate the discharge from the well in gpm and total gallons. Pump
development is estimated at four hours and shall be paid by the HR (Bid Schedule 1, Item 10).
4.11 Aquifer Testing
The Contractor shall conduct an aquifer pumping test for approximately six (6) hours, using the
same pump equipment which was used during pump development. The aquifer pumping test
shall start after the non-pumping water level in the well has returned to within five feet of the static
water level at the start of pump development.
The entire six hour aquifer pumping test must continue without interruption. If equipment failures
or lack of fuel interrupt the test for more than 30 minutes, the entire test must start over until six
hours of uninterrupted testing has been accomplished. The anticipated pumping rate is estimated
at 40 gpm. The Hydrogeologist may adjust the pumping rate and endurance of the test if
necessary. At the end of pumping, the Contractor shall allow the water level to recover for at
least 4 hours before removing the pumping equipment. The Contractor is responsible for
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 8
collecting subsequent water level drawdown, discharge rate and sand production measurements
at 30-minute intervals during the pumping period. The aquifer pumping test is estimated at six
hours and shall be paid by the HR (Bid Schedule 1, Item 11).
4.12 Video Survey
The Contractor shall perform a downhole video survey to document the condition and structural
integrity of the completed well. The camera for the video survey shall have downhole and side-
scanning capabilities and the ability to record colored video footage of the well on digital video
disc recording (in common player format) equipment to the entire completed depth of the well.
The Contractor shall allow the well to set idle for one week prior to conducting the video survey
to assure a clear picture. The camera shall be disinfected prior to placement in the well. The
Contractor shall take whatever action is deemed necessary, at his expense, to correct any
deficiencies noted during this inspection. Three DVD copies of the video survey shall be provided
to the Hydrologist. The video survey shall be paid as a LS (Bid Schedule 1, Item 12).
4.13 Plumbness and Alignment
This well is located within 20 feet of the existing well. The Contractor shall ensure the plumbness
and alignment of the well during drilling of the borehole and installation of all well materials. It is
the option of the Contractor to perform a TOTCO or equivalent alignment survey every 100 feet
during the pilot-hole drilling. Deviation shall not exceed 0.5 degrees (6 inches per 100 feet). When
completed, the cased well shall allow complete and unhindered passage and removal of a
minimum four-inch diameter pump, motor, electric cable and column pipe.
4.14 Performance of Contractor
If the Hydrogeologist determines that, for reasons beyond the control of the Contractor, it is
necessary to stop drilling or if the borehole is lost before the objective or desired depth is reached,
and further attempts to save or complete the borehole are not practical, a written order to abandon
the borehole will be issued. The Contractor shall be compensated on a time and material basis
for attempts to save the borehole subject to approval by the Hydrogeologist. The Contractor shall
abandon the borehole in accordance with Arizona Administrative Code Article 8, R12-1-816 as
applicable to well abandonment (Bid Schedule 1, Item 13).
If the Hydrogeologist determines that the borehole is lost due to negligence, incompetence,
contamination, or malpractice on the part of the Contractor or their personnel, or due to the use
of defective or unsuitable equipment, the Hydrogeologist will immediately notify the Contractor in
writing. The Hydrogeologist will provide written documentation of this decision within 24 hours
and order the borehole abandoned. The Contractor shall not be paid for any footage drilled or
for other operations performed in the abandoned borehole and shall be responsible for replacing
any lost casing or screen in accordance with these specifications. The Contractor, at their own
expense, shall abandon the borehole in accordance with A.A.C. Article 8, R12-15-816 as
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
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Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 9
applicable to lost borehole abandonment. The Contractor shall drill a new borehole at an alternate
site in the immediate area as approved by the Hydrogeologist. If any work delays are caused by
failure of the Contractor to comply with any item of these specifications, or because materials are
rejected by the Hydrogeologist, then the Contractor shall bear the burden of additional expenses
directly resulting from the non-compliance, including reimbursement of the Hydrogeologist fees.
5.0 METHOD OF MEASUREMENT
Mobilization and Demobilization: Will be measured as a LS.
Conductor Borehole, Casing and Surface Seal: Will be measured as a LS.
Borehole Drilling: Will be measured to the nearest LF.
Blank HSLA Casing and Installation: Will be measured to the nearest LF.
Louvered HSLA Casing and Installation with End Cap: Will be measured to the nearest LF.
Gravel Pack and Installation: Will be measured by the CF.
Bentonite Seal and Installation: Will be measured by the CF.
Bentonite Grout Slurry and Installation: Will be measured by the CF.
Airlift Development: Will be measured by the HR.
Pump Development: Will be measured by the HR.
Aquifer Testing: Will be paid by the hour.
Video Survey: Will be paid LS.
Well Abandonment (if required for new supply well): Will be measured for payment to the nearest
LF from the top of the casing to the bottom of the borehole.
6.0 BASIS OF PAYMENT
Mobilization and Demobilization: Payment will be measured as provided above, will be made at
the contract LS price, which shall be full compensation for supplying and furnishing all materials,
facilities and services for the work involved as specified herein.
Conductor Borehole, Casing and Surface Seal: Payment will be measured as provided above,
will be made at the contract LS price, which shall be full compensation for supplying and
furnishing all materials, facilities and services for the work involved as specified herein.
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 10
Borehole Drilling: Payment for the accepted quantities, measured as provided above, will be
paid for at the contract unit price per LF, which price shall be full compensation for the work,
complete in place.
Blank HSLA Casing and Installation: Payment for the accepted quantities, measured as provided
above, will be paid for at the contract unit price per LF, which price shall be full compensation for
the work, complete in place.
Louvered HSLA Casing and Installation with End Cap: Payment for the accepted quantities,
measured as provided above, will be paid for at the contract unit price per LF, which price shall
be full compensation for the work, complete in place.
Gravel Pack and Installation: Payment for the accepted quantities, measured as provided above,
will be made at the contract unit price per CF, which shall be full compensation for supplying and
furnishing all materials, facilities and services for the work involved as specified herein.
Bentonite Seal and Installation: Payment for the accepted quantities, measured as provided
above, will be made at the contract unit price per CF, which shall be full compensation for
supplying and furnishing all materials, facilities and services for the work involved as specified
herein.
Bentonite Grout Slurry and Installation: Payment for the accepted quantities, measured as
provided above, will be made at the contract unit price per CF, which shall be full compensation
for supplying and furnishing all materials, facilities and services for the work involved as specified
herein.
Airlift Development: Payment for the accepted quantities, measured as provided above, will be
paid for at the contract unit price per HR, complete in place. The contract price shall be full
compensation for performing the work as specified in the specifications, and as directed by the
Hydrogeologist.
Pump Development: Payment for the accepted quantities, measured as provided above, will be
paid for at the contract unit price per HR, complete in place. The contract price shall be full
compensation for performing the work as specified in the specifications, and as directed by the
Hydrogeologist.
Aquifer Testing: Payment for the accepted quantities, measured as provided above, will be paid
for at the contract unit price per HR, complete in place. The contract price shall be full
compensation for performing the work as specified in the specifications, and as directed by the
Hydrogeologist.
Video Survey: Payment will be measured as provided above, will be made at the contract LS
price, which shall be full compensation for supplying and furnishing all materials, facilities and
services for the work involved as specified herein.
Technical Specifications for Drilling, Construction and Testing of One Supply Well Sentinel School
Sentinel, Arizona
Sunrise Engineering Inc. ATC Group Services LLC March 26, 2020 Project No.1054200833 11
Well Abandonment (if required for new supply well): Payment for the accepted quantities,
measured as provided above, will be paid for at the contract LF unit price, complete in place.
The contract price shall be full compensation for furnishing all labor, materials, tools, equipment
and incidentals involved in abandonment of the well.
No separate measurement or direct payment will be made for welding of the casing, containment
of waste fluids and materials, and plumbness and alignment. The cost is considered included in
the contract items.
No measurement or direct payment will be made for preparation and rough grading of the site,
restoring the site to the condition before the start of construction, disposal of spoils, and any
standby time. The cost is considered as included in the contract items.
SENTINEL ELEMENTARY DISTRICT NO. 71
REPLACEMENT WELL
WELL LOCATION MAP
PROJECT NUMBER:
APPROVED BY:
DATE: 3/10/20
DRAWN BY: PP&SS
FIGURE1
9185 S. Farmer Avenue, Suite 111Tempe, Arizona 85284
1054200833
SENTINEL ELEMENTARY DISTRICT NO. 71
REPLACEMENT WELL
CONCEPTUAL DESIGN
PROJECT NUMBER:
APPROVED BY:
DATE: 3/10/20
DRAWN BY: PP&SS
FIGURE2
9185 S. Farmer Avenue, Suite 111Tempe, Arizona 85284
0’
20’
Nominal 20” dia. Conductor Borehole (0-20’)
Sand Cement Grout Surface Seal (0-20’)
16” dia. LCS Conductor Casing (0-20’)
6” dia. Blank HSLA Steel Casing, 0.250” wall thickness (+2-400’)
Nominal 12” dia. Borehole (20’- 550’)
Bentonite Grout Slurry (0- 295’)
Bentonite Seal (295-300’)
Casing Centralizers, HSLA Steel (40’ intervals)
295’
300’
550’
6” dia. Louvered HSLA Steel casing, 0.050 slot, 0.250” wall thickness (400-550’)
HSLA End Cap
NOT TO SCALE
1054200833
Gravel Pack, 8-12 sieve (300-550’)
+2’
400’
Static Water Level 216 Feet
350’4” dia. Submersible Pump (approximate setting; overseen by Sunrise Engineering)
Electric Cable1 ½” dia. PVC Sch 120 Drop Pipe (+2-350)
1’ dia. PVC Sch 40, Sounding Tube (+2-340) (overseen by Sunrise Engineering)
Total length of blank HSLA casing = 400 feetTotal length of louvered HSAL casing = 150 feet
Suggested Well Head Design (overseen by the Engineer)
Elements in gray are not provided by ATC and will be installed after completion of the well.
SENTINEL ELEMENTARY DISTRICT NO. 71
REPLACEMENT WELL
ESTIMATED SUBSURFACE GEOLOGY
NOT TO SCALE
35’
0’
150’
550’
Soft silt and hard caliche
Dark volcanic rock (basalt) and possibly interbedded layers of softer dark volcanic cinders
Interbedded sand, silt, and clay
PROJECT NUMBER:
APPROVED BY:
DATE: 3/10/20
DRAWN BY: PP&SS
FIGURE3
9185 S. Farmer Avenue, Suite 111Tempe, Arizona 85284
1054200833
Bid Schedule 1
Sentinel Elementary District No. 71
Supply Well
Cost Estimate
Item No. Text Ref. Description Unit Quantity Unit Price Total
1 4.1 Mobilization and Demobilization LS 12 4.2 Conductor Borehole Drilling, Casing and Surface Seal LS 13 4.3 Borehole Drilling LF 5304 4.4 Blank HSLA Casing and Installation LF 4025 4.5 Louvered HSLA Casing and Installation with End Cap LF 1506 4.6 Gravel Pack and Installation CF 1917 4.7 Bentonite Seal and Installation CF 48 4.8 Bentonite Grout Slurry and Installation CF 2269 4.9 Airlift Development HR 410 4.10 Pump Development HR 411 4.11 Aquifer Test HR 612 4.12 Video Survey
Total Cost
Optional Items
13 4.14 Well Abandonment LF 1 *****