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


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


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.


Sentinel, Arizona


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.


Sentinel, Arizona


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


Sentinel, Arizona


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


Sentinel, Arizona


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


Sentinel, Arizona


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).


Sentinel, Arizona


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


Sentinel, Arizona


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


Sentinel, Arizona


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.


Sentinel, Arizona


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


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


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.


Sentinel, Arizona


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.

FIGURES

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


REPLACEMENT WELL

CONCEPTUAL DESIGN

PROJECT NUMBER:

APPROVED BY:

DATE: 3/10/20

DRAWN BY: PP&SS

FIGURE2


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.


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


1054200833

TABLES

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 *****

Documents

Technical Specification for Drilling Construction and