well sites - buckeyeaz.gov

WELL SITES CHAPTER 3

SECTION 5

ENGINEERING DESIGN

STANDARDS

The City of Buckeye Arizona

Engineering Design Standards Adopted May 18, 2021

Section 3-5 WELL SITES

City of Buckeye May 18, 2021 Page 1

TABLE OF CONTENTS

3-5.000 GENERAL INFORMATION: ..................................... 3

3-5.001 WELL SITE REQUIREMENTS: ........................................... 3 3-5.002 DEFINITIONS AND ABBREVIATIONS:................................. 3 3-5.003 GENERAL REQUIREMENTS: ............................................ 6 3-5.004 DESIGN POLICY: .......................................................... 6 3-5.005 DILIGENCE: ................................................................ 8 3-5.006 DRINKING WATER REGULATIONS: .................................. 8 3-5.007 PRIVATE WELLS: ......................................................... 9 3-5.008 ADWR WITHDRAWAL AUTHORITY: ............................... 9

3-5.100 REQUIRED REPORTS AND SUBMITTALS: ............ 10

3-5.101 WELL DRILLING APPROVAL: ........................................ 10 3-5.102 TEST HOLE COMPLETION AND WATER QUALITY REPORT:.. 11 3-5.103 WELL COMPLETION DESIGN REPORT: ........................... 11 3-5.104 WELL COMPLETION REPORT: ...................................... 11 3-5.105 WATER TREATMENT REPORT: ..................................... 12

3-5.200 TEST HOLE/PILOT BOREHOLE REQUIREMENTS: . 13

3-5.300 DESIGN REQUIREMENTS: ................................... 13

3-5.301 FIRM SUPPLY: .......................................................... 13 3-5.302 WATER QUALITY GOALS AND REQUIREMENTS: ............... 15 3-5.303 WELL PERFORMANCE REQUIREMENTS: ......................... 17 3-5.304 WELL CASING AND SCREEN SIZE REQUIREMENTS:............ 19

3-5.400 WELL CONSTRUCTION: ...................................... 19

3-5.401 PILOT BORE: ............................................................ 19 3-5.402 GEOPHYSICAL LOGGING: ............................................ 20 3-5.403 WELL DRILLING EXAM FOR SAMPLING PROTOCOL: .......... 21 3-5.404 WELL MATERIAL PARAMETERS: ................................... 21 3-5.405 WELL DEVELOPMENT AFTER DRILLING:.......................... 23

3-5.500 WELL SITE DESIGN AND EQUIPPING: .................. 25

3-5.501 GENERAL INFORMATION: .............................................25 3-5.502 WELL SITE PLAN: ........................................................25 3-5.503 ON-SITE RETENTION BASIN: .........................................26 3-5.504 PUMP AND MOTOR: ...................................................27 3-5.505 SANITARY SEAL/WELL PAD: ..........................................28 3-5.506 PIPING: .....................................................................28 3-5.507 ELECTRIC POWER SERVICE/STAND-BY POWER: .................30 3-5.508 ELECTRICAL BUILDING: .................................................30 3-5.509 FACILITY SECURITY: .....................................................31 3-5.510 COMMUNICATION AND CONTROLS: ................................31

3-5.600 DESIGN PLANS AND SPECIFICATIONS: ................ 32

3-5.700 EXISTING WELLS: ................................................ 33

3-5.701 KNOWN CONSTRUCTION WITHOUT PREVIOUS USE: ...........33 3-5.702 UNKNOWN CONSTRUCTION OR PREVIOUS USE: ................33

3-5.800 USE RESTRICTIONS FOR CONSTRUCTION WATER 33

3-5.900 CLOSEOUT: ......................................................... 34

3-5.901 WELLSITE IMPROVEMENT CLOSEOUT: .............................34

STANDARD DETAILS APPENDIX 1 STANDARD DETAIL S......................................... 35

3-5.406 TESTING, INSPECTION, AND REPORTING:........................ 24



Section 3-5 – Well Sites This section provides policy and standards establishing design criteria for constructing and modifying municipal well systems to be owned, operated, and maintained by the City of Buckeye. It provides guidance on design report preparation, well site design and equipping, and final plans preparation.

The requirements of this design standard may be modified at any time by the City Engineer.

The City Engineer may approve variances to the requirements of this design standard. Variance requests must be submitted in writing and include a justification for the variance requested. The submittal of any plans or design reports to the City of Buckeye shall include a copy of the City-approved variance.

The City Engineer is required, pursuant to Chapter 23, Article 23-2, of the City Code, to develop standards and details regarding public improvements to be constructed within the City. The standards, design criteria, and policy set forth in this Section were developed and recommended by the City Engineer pursuant to Chapter 23, Article 23-2 and adopted by City Council in Resolution No. 26-21.



3-5 Well Sites 3-5.000 General Information:

3-5.001 Well Site Requirements: A. This Standard provides information on requirements for the design, construction, and approval of

wells for potable service that shall be conveyed to the City of Buckeye and its Water Resources Department.

1. All facilities shall be designed and constructed in accordance with Arizona Department ofEnvironmental Quality (ADEQ) Bulletin 10 Guidelines for Construction of Water Systems(ADEQ, 1978), and American Water Works Association (AWWA) Standard A100-15(AWWA, 2006) or the most recent version of these standards.

2. After placement of the related equipment, wells shall be disinfected in accordance withADEQ Bulletin 8 Disinfection of Water Systems (ADEQ, 1978). This standard is notapplicable to Private Wells.

3. Conflicts between referenced standards and requirements and this Standard are to be broughtto the attention of City Engineer for resolution.

B. The goal of this Standard is to:

1. Establish well design and equipping standards that optimize water quality with acceptableproduction.

2. Ensure reliability of the equipment/facilities for future service.

3. Integrate water production and operation into established or planned treatment facilities,existing and planned pressure zones, and control systems.

4. Minimize the cost of operation, maintenance, rehabilitation, and eventual replacement ofequipment/facilities to the City of Buckeye’s water utility customers.

C. This Standard is organized:

1. To present the City of Buckeye’s policy regarding the requirement for firm water supply inthe context of existing, planned and future water campuses

2. Describe water quality requirements that affect well construction and production capacity(i.e., the number of wells)

3. Describe well site requirements

4. Describe test hole and pilot bore requirements

5. Describe well construction requirements

6. Describe procedural requirements.

Definitions and Abbreviations: A. AB – Aggregate Base

B. Approved Equal: Material or equipment that the City Engineer has approved or may approve. City Engineer approved materials and equipment may be found on the Approved Materials List. Use



of materials and equipment not specified in this Standard or on the Approved Materials List require the approval of the City Engineer, or his representative.

C. ADEQ – Arizona Department of Environmental Quality

D. ADWR – Arizona Department of Water Resources

E. AF/Y – Acre feet per year

F. ANSI – American National Standards Institute

G. AOC – Approval of Construction

H. ASTM – American Society of Testing and Materials

I. ATC – Approval to Construct

J. AWWA – American Water Works Association

K. AZPDES – Arizona Pollutant Discharge Elimination System

L. City/COB – City of Buckeye

M. CMU – Concrete Masonry Unit

N. DIP – Ductile Iron Pipe

O. EPA – Environmental Protection Agency

P. Existing Water Campus: A regional water treatment facility serving one or more developments that is in operation or a facility where construction has commenced.

Q. Extra Production: Supply from installed production wells that is in addition to the amount needed for firm supply.

R. Firm Supply: Water in sufficient quantity to supply the service area throughout the year and that meets maximum day demand at build-out accounting for well duty cycle, treatment facility wastage and reject, blending constraints, permitted maximum annual withdrawal, and well redundancy.

S. Ft3/Min – Cubic Feet per Minute

T. Future Water Campus: A regional water treatment facility that will serve one or more developments that is discussed in the latest integrated water master plan, or latest water resources plan, or that has been documented in discussions with the City Engineer. Detailed planning in the form of an exact location and confirmed capacity will not exist for a future water campus.

U. GHz – Gigahertz

V. GPM – Gallons Per Minute

W. HP – Horsepower

X. ID – Inside Diameter

Y. I/O – Inputs/Outputs

Z. LCS – Low Carbon Steel

AA. MCESD – Maricopa County Environmental Services Department

BB. MCL – Maximum Contaminate Levels

CC. mg/L – Milligrams per Liter



DD. NOI – Notice of Intent

EE. NPDWR – National Primary Drinking Water Regulations

FF. NSF – National Sanitation Foundation

GG. OIT – Operator Interface Terminal (a.k.a. Human Machine Interface (HMI))

HH. OSHA – Occupational Safety and Health Administration

II. O&M – Operation and Maintenance

JJ. P.E. – Professional Engineer

KK. pH – Potential Hydrogen

LL. Pilot Borehole: A small (16” to 18”) diameter borehole for the purpose of constructing test zones within the borehole for zonal groundwater sampling and conducting falling head tests for determining whether the borehole should be capped, or reamed to be completed as a production well, or abandoned.

MM. Planned Water Campus: A regional water treatment facility that will serve one or more developments for which detailed service area planning exists, or where an exact location exists, or where land acquisition has commenced or is planned, or a facility for which capital improvement program funds are allocated. Service area planning may be in the form of a Water Service Area (WSA) Master Plan (existing, in-progress, or approved), or a developer has approved master plan.

NN. PLC – Programmable Logic Controller

OO. PPM – Parts per Million

PP. Property Frontage: property frontage is that portion of the property that abuts a street, PUE, or public ROW.

QQ. PSI – Pounds per Square Inch

RR. PUE – Public Utility Easement

SS. PVC – Polyvinyl Chloride

TT. R.G. – Registered Geologist

UU. Reject Water: The process wastewater (brine) associated with an R.O. plant. Additional raw water supply is necessary to make up for water lost in the reject stream.

VV. R.O. – Reverse Osmosis

WW. ROW – Right of Way

XX. RPM – Revolutions per Minute

YY. SCADA – Supervisory Control and Data Acquisition

ZZ. SMCL – Secondary Maximum Contaminate Levels

AAA. SP – Spontaneous Potential

BBB. SS – Stainless-Steel

CCC. Subsequent Conditions: Conditions that occur or circumstances that result after City Engineer approval and before build out that have the effect of reducing well production, firm supply, or max day treatment capacity. Examples include: ADWR permitted withdrawal rate (relative to pump



capacity), decline in aquifer yield, degradation of the aquifer water quality, or recently promulgated or adopted regulations, and treatment or pumping system performance significantly less than anticipated.

DDD. Test Hole: A temporary small (8” to 16”) diameter boring designed to collect drilled cuttings and conduct geophysical logging for lithographic logging of the aquifer material, and to construct specific test zones within the boring to collect groundwater samples and conduct falling head tests to estimate hydraulic conductivity of the aquifer material. The boring is temporary in nature having a temporary surface casing for borehole construction stability that will be removed following zonal sampling. The boring will be abandoned per ADWR requirements prior to use of a production well at the same location.

EEE. TDS – Total Dissolved Solids

FFF. Wastage: Water consumed during the treatment of water that is not recovered. It may include backwash wastewater, dewatering container filtrate, belt-filter press filtrate, centrifuge centrate, water contained in solids, washdown water, process analyzer wastewater, and similar wastestreams including all wastestreams that are routed to the sanitary sewer. Process wastewater that is reclaimed on-site is not considered wastage.

GGG. WSA – Water Service Area (regional context)

HHH. Well Field: The group of wells that supply a water campus.

III. °F – Degrees Fahrenheit

General Requirements: A. Developers shall install at their expense all improvements necessary to provide water supply to

their development, or to an existing City water treatment campus, or to an initial phase of a planned water campus, whichever is appropriate to the development location. Improvements may include wells, raw water transmission lines, raw water storage, portions or phases of regional treatment campuses including waste management facilities, booster pump stations to one or more pressure zones, reservoirs, transmission mains, distribution mains, pressure reducing stations or other facilities, and the payment of all required development fees. If tying into an existing water treatment campus, Developer will be responsible for raw water transmission mains that to tie into an existing system, or that are directly routed into the treatment campus. The Developer shall identify the appropriate points of connection with the City Engineer prior to any well and transmission system design.

Design Policy: A. An Arizona registered professional engineer (P.E.) (The Engineer) shall oversee design and seal

documents associated with the design and construction of a well unless otherwise specifically stated within this document.

B. This Standard includes the necessary well design and site layout requirements to ensure longevity for each well and its corresponding facility.

C. Well site size shall be sufficient to drill two wells, an original well and its replacement.

1. The required minimum size of the well site to support two wells and the ancillary equipmentis 150’ x 150’.

2. Parcels smaller than 22,500 sq. ft. will not be considered.



3. Alternate non-square sites may be acceptable and require the approval of the City Engineer.

4. These requirements are intended to optimize this longevity and ensure that there areprovisions to expeditiously drill an additional or replacement well on each site.

D. Wells shall pump to regional water treatment campuses where appropriate blending, treatment, and waste management facilities exist, or will exist, or could be implemented.

E. Wells that pump directly to the distribution system with treatment consisting of only disinfection, or pressure vessels and disinfection, are prohibited.

F. Wellhead treatment is not allowed for single or multiple well sites. Wellhead treatment will not be approved in Water Service Areas (WSAs) where regional campuses exist, or are planned, or where a campus approach could be implemented. The City Engineer must approve any variances.

G. Well transmission mains are required along the entire length of all property line frontages, whenever future upstream extension of the well system is required.

1. If a parcel to be developed has more than one property line frontage, well transmission mainsshall be installed along the entire length of all frontages or as required by the City Engineer oran approved master plan.

2. Well transmission main sizing in the vicinity of water treatment campuses are to be based onthe build-out capacity of the campus with sufficient capacity to achieve the facility’s finishedwater production rating accounting for wastage and/or reject water.

H. When assessing the water supply required for a service area, sufficient quantities are defined as firm supply.

I. When assessing the number of well sites required for a service area, the firm supply requirement along with the aquifer characteristics dictate the number of wells and well sites required. The City’s minimum number of well sites to be dedicated will be at least 2 well sites per quarter section (160 acres).

1. The number of wells required to satisfy firm supply may be less than the number of well sitesdedicated.

J. When requested by the City, the Engineer shall certify an analysis that encompasses the development area and adjacent mains and booster stations where deemed necessary by the City. The effects of max day demands and fire flows shall be evaluated to ensure adequate water supply for the service area.

K. The City has adopted an 18-hour duty cycle to allow the aquifer to recover each day.

L. When assessing the water supply, the City shall base its assessment on an 18-hour duty cycle and use the lesser of the permitted maximum annual withdrawal rates or the actual pumping capacity, and consider redundancy, available or anticipated treatment, actual water quality, and blending constraints to determine the supply available or the number of wells that will be required.

M. If contaminants not controlling initial facility design, or drinking water regulations change after the installation of City approved facilities but before all wells or treatment is built, the City Engineer considers this a subsequent condition that may necessitate a change in the assessment of firm supply or adequacy of treatment, or both.

N. Well redundancy requirements are required to be met at the initial phase of development and that redundancy shall be maintained throughout the life of the development.



O. Engineering Bulletin No. 10, Guidelines for the Construction of Water Systems, published by ADEQ, as well as the Arizona Administrative Code, Title 18 - Environmental Quality, contain specific requirements for submittals, approvals, and notifications when improvements of public water system are proposed. The Developer/Landowner and the design Engineer shall comply with all laws, regulations, and requirements.

P. All Developers/Landowners required or desiring to connect to the City of Buckeye water system are required to be annexed within the city's corporate limits.

Q. Ownership of well sites and wells are to be conveyed to the City.

R. All construction documents shall be prepared by a registered Professional Civil Engineer licensed and practicing in the State of Arizona pursuant to the provisions of A.R.S. §§32-101, 32-121 to 131; 32-141 to 152. Each sheet of the plans shall include the appropriate professional State of Arizona seal, signature, date and date of expiration below seal. The city does not require original seals and or signatures (wet seal) on design documents during the review cycle.

S. All final plans that include connection to or extension of the City’s water system, or a system that is to be dedicated to the City, must be submitted to the City of Buckeye for review and approval. Plan review fees must be paid at the time of plan submittal.

Diligence: A. Developers/Landowners shall verify the need for any well system improvements necessary to

provide water supply to the City system in order to develop their current project. Available resources in which to find this information:

1. Records – obtain existing utility maps and as-built drawings;

2. City’s website – https://www.buckeyeaz.gov/;

3. Discovery Meeting through Development Services;

4. PAC meeting through Development Services and

5. The City Engineer can confirm the need for any required extension or condition for watersupply.

6. The City Engineer can confirm the status of existing, planned, and future water treatmentcampuses with regard to master planning, start of construction, and commencement ofoperation.

7. The City Engineer can confirm existing and planned treatment processes at each water campus.

8. The City Engineer can confirm existing, planned, and future well transmission line sizes androuting.

B. Any apparent field condition, error, omission, etc. shall be brought to the attention of the City Engineer.

Drinking Water Regulations: A. The NPDWR include legally enforceable primary water quality standards that apply to public water

systems. Primary standards and treatment techniques protect public health by limiting the levels of contaminants in drinking water. The full list of the parameters and the MCLs can be found on the EPA website.

https://www.buckeyeaz.gov/



B. Particular concern for the City of Buckeye are the parameters of arsenic, nitrate, and fluoride; which are often present in the aquifers at relatively high concentrations and in many locations exceeding the MCLs.

1. The current regulated MCL levels are as follows:

a. Arsenic at 0.010 mg/L,

b. Nitrate at 10 mg/L, and

c. Fluoride at 4.0 mg/L and SMCL of 2.0 mg/L.

C. ADEQ has primary responsibility for enforcement of the drinking water regulations through Arizona Administrative Code R18-4-101 to R18-4-804.

D. All City, County, and State requirements for well construction shall be met, including the following:

1. City of Buckeye:

a. Submittal pertaining to Proposed Drilling Program

b. Test Hole Completion and Water Quality Report

c. Pilot Borehole Water Quality Report

d. Proposed Well Completion Design Report

2. ADWR Well Drilling Permit; and

3. MCESD ATC, as delegated by ADEQ.

4. The ATC/AOC process requires a New Source groundwater samples that shall be collectedfrom the well after equipping.

5. The New Source Approval, which requires recent groundwater sampling data, will be requiredto receive a Certificate of AOC from the MCESD. Approval from MCESD as well as the Cityis dependent upon the groundwater quality and any plans for water treatment to assurecompliance with drinking water regulations and finished water quality goals.

6. Before the water system is accepted or put into service and prior to any issuance of a Certificateof Occupancy, the Developer/Landowner shall submit a Certificate of AOC signed by MCESD

Private Wells: A. All private wells shall be permitted through ADWR and Maricopa County; the City does not issue

permits for private wells. Maricopa County will assure appropriate setbacks from septic and sewer systems.

B. No private well shall be placed where it will impact, obstruct, or prevent access to a City well.

C. Private wells that are no longer in beneficial service are to be formally abandoned in accordance with ADWR requirements to preserve regional groundwater quality.

ADWR Withdrawal Authority: A. If a development requires that a new water service area right be established, the

Developer/Landowner shall file an Initial Notice of Intent (NOI) to Establish a New Service Area Right and a Final Petition to Establish a New Service Area Right and pay ADWR fees, The



Developer/Landowner shall also provide, at no cost to the City, valid Type 1 Non-Irrigation Grandfathered Rights, Type 2 Non-Irrigation Grandfathered Rights, or Long-term Storage Credits that may be recovered from an ADWR permitted recovery well, or other rights approved by the ADWR and acceptable to the City in sufficient quantities to establish the service area.

B. If a development involves a well located outside of the City of Buckeye’s service area (as defined by ADWR), then a withdrawal authority such as Type 2 Non-Irrigation Grandfathered Rights may be required. Water rights need to be provided in such quantity as to assure firm supply.

3-5.100 Required Reports and Submittals:

Well Drilling Approval: A. A Proposed Well Drilling Program submittal with attachments shall be prepared and submitted to

the City Engineer for approval prior to drilling the test hole or pilot borehole. At a minimum, the Proposed Well Drilling Program document shall include:

1. Well Location

2. Well Siting Study, which shall include the following:

a. Local Hydrogeology Information

b. Anticipated Water Quality

c. Estimated Water Production (yield)

d. Preliminary Well Impact Evaluation, and

e. Identification of any potential sources of contamination within 300 feet of the well location;

3. Well Technical Specification, including at minimum:

a. Test hole construction and abandonment

b. Drilling fluid control program

c. Drilling methods

d. Surface casing installation

e. Pilot borehole drilling

f. Geophysical logging

g. Zonal formation water quality sampling

h. Zonal falling head testing

i. Zonal pump testing

j. Production well installation

k. Well development and aquifer testing

l. Well plumbness and alignment, and

m. Video survey.



Test Hole Completion and Water Quality Report: A. The Test Hole Completion and Water Quality Report shall be prepared and submitted to the City

Engineer for review and approval to proceed.

B. At a minimum, the report shall include:

1. Driller’s Logs

2. Lithologic Logs

3. Geophysical Logs

4. Zonal Water Quality Information, and

5. Completion Recommendations.

C. Upon approval, construction of the pilot-bore of the production well can proceed.

D. The test hole is to be abandoned after water quality sampling results are reviewed and before use of the production well. Obtain City Engineer approval prior to abandonment.

Well Completion Design Report: A. The Proposed Well Completion Design Report shall be prepared and submitted to the City

Engineer for review following the pilot borehole drilling and prior to finalization of the design and construction of the well.

B. At a minimum, the report shall include:

1. Driller’s Logs

2. Lithologic Logs (including physical samples of the lithologic material, e.g. chip trays, ifrequested),

3. Sieve analyses of lithologic samples

4. Geophysical Logs

5. Zonal Water Quality Information, and

6. Completion Recommendations.

C. The Proposed Well Completion Design Report shall be prepared by a R.G. licensed in Arizona.

D. The evaluations and conclusions of the R.G. shall be provided to the City Engineer in writing for approval prior to finalization of the design and construction of the well.

E. The City of Buckeye acknowledges that the timeframe for review and finalization of such report can be as little as 24 to 48 hours when the reverse circulation drilling method has been employed in a comprehensive pilot borehole and production well drilling effort.

Well Completion Report: A. The Well Completion Report shall be submitted after completion of well installation, testing, and

downhole video and shall be completed and sealed by an Arizona R.G.

B. The report shall include the following, at a minimum:

1. Summary of pilot borehole, drilling method, and lithologic log



2. Results of downhole geophysical survey

3. Summary and results of zonal analyses including water quality data and aquifer transmissivity

4. Summary of final well design, based upon the lithologic data, geophysical results, and zonalanalyses including a well diagram

5. Summary of final well installation

6. Summary and results of well development

7. Summary and results of aquifer testing including graphs

8. Summary and results of New Source Groundwater Sample

9. Summary of downhole video survey and gyroscopic survey,

10. Copy of ADWR permit identifying permitted maximum annual withdrawal rate.

11. Calculated pumping rate based on permitted maximum annual withdrawal rate and 18-hour perday duty cycle.

12. The calculated pumping rate cannot be greater than what the lithology and aquifercharacteristics will yield.

13. Selected pumping rate, pump setting depth, and projected pumping water levels. The selectedpumping rate must be no greater than 15% larger than the pumping rate calculated in item 11.

Water Treatment Report: A. Whenever the estimated or actual water quantity and quality from a well exceeds raw or finished

water quality goals as stated within this standard, or 70% of any MCL is exceeded, treatment is required and a Water Treatment Report must be prepared and submitted for City approval.

B. City approval of the Water Treatment Report is required prior to New Source Sampling data being sent to MCESD. A blending strategy may need to be developed prior to transmittal to MCESD.

C. The City Engineer will require treatment upgrades and/or facility expansion, if necessary.

D. Wells are to remain separated from well) transmission lines at the wellhead until City approval of the Water Treatment Report.

E. The City Engineer will require that the well be capped or abandoned if the Water Treatment Report is not approved.

F. The required components of report shall be developed in coordination with the City. At a minimum, the Water Treatment Report shall address:

1. Executive summary

2. Finished water quality goals

3. Flowrate and water quality data, individual well and combined wells.

4. For the designated campus, existing treatment facility capability and capacity.

5. For the designated campus, planned treatment facility capability and capacity.

6. Evaluation of the ability to treat water from the well once combined with other wells.



7. Conclusion with regard to whether the well can be treated to meet finished water quality goalswithout an expansion of capacity or modification of treatment.

3-5.200 Test Hole/Pilot Borehole Requirements: A. Unless waived by the City Engineer, a test hole or a pilot borehole is required to allow water quality

to be managed through proper louvered screen placement.

B. This requirement exists to increase the probability of success that the larger diameter production well will have a water quality that can be readily integrated into existing or planned treatment campuses.

C. A test hole is a small diameter (8” to 16”) well constructed for the purpose of obtaining zonal water quality samples.

1. A test hole must be located in close proximity, and preferably, on the same site as the proposedproduction well.

2. Zonal sampling will require sufficient development prior to sampling zonal water quality.

3. A test hole, or program of test holes, is required in the following situations:

a. Development of regional water campuses with multiple candidate well sites when treatmentprocess decisions and well transmission sizing and routing needs to be determined.

b. Replacement wells for wells with water quality concerns, especially in areas where thecontaminant(s) of concern are ubiquitous.

c. Proposed production wells in the vicinity of known areas of poorer water quality or adversehydrogeological features.

4. A test hole must be formally abandoned per ADWR requirements prior to the use of theproduction well.

D. A pilot borehole is a small (16” to 18”) boring that will eventually be reamed out and cased to be the production well. A pilot borehole typically proceeds and becomes the larger diameter production well.

1. A pilot borehole, without a prior test hole, is appropriate for replacement of wells on the samesite, or in close proximity, to an existing well where there are no water quality concerns.

2. A pilot borehole approach, without a test hole, is appropriate when the production well willsupply a treatment campus that is actually equipped with RO treatment.

3. If a pilot borehole is used, the drill rig is not allowed to leave the site until the well is completed,capped, or abandoned at the City’s discretion.

3-5.300 Design Requirements:

Firm Supply: A. The water supply requirement is a sufficient quantity to supply the service area throughout the year

and that meets maximum day demand at build-out accounting for:

1. Well duty cycle (maximum 18-hour/day pumping)

2. Treatment facility wastage:



a. Facilities with RO treatment (15% reject and wastage minimum, or use actual value ifknown).

b. Arsenic removal facilities without RO treatment (5% wastage minimum, or use actualvalue if known).

c. Wastage for any other treatment method shall be calculated based on the design for thespecific treatment process.

3. Blending:

a. A well that cannot be fully utilized at its permitted withdrawal rate because of utilizationin a blending scheme to manage a contaminant concentration is a situation that requiresadditional supply to be provided.

b. Any well that depends on the use of another well is a situation that requires additionalsupply to be provided.

c. Wells being used for blending may affect the redundancy calculation requiring additionalwells.

d. The City Engineer has final authority with regard to assessing and approving blendingscheme impacts and this approval must occur prior to submittal to MCESD.

4. Permitted maximum annual water withdrawal:

a. When assessing supply from a single well, the City Engineer will interpret the supplyassociated with the ADWR permitted maximum annual withdrawal on an 18-hour per day365 day per year basis:

i. Pump capacity shall be matched with the known or anticipated permitted maximumannual withdrawal rate. This will allow the pumping 365 days per year withoutextraordinary costs being incurred.

ii. The following calculation, starting with the ADWR maximum annual permittedwithdrawal rate, shall be used to determine the pumping rate of the well:

Example calculation based on 1,200 acre-ft/year:

1,200 𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎 − 𝑓𝑓𝑓𝑓𝑦𝑦𝑎𝑎𝑎𝑎𝑎𝑎

×𝑦𝑦𝑎𝑎𝑎𝑎𝑎𝑎

365 𝑑𝑑𝑎𝑎𝑦𝑦𝑑𝑑×

𝑑𝑑𝑎𝑎𝑦𝑦1,080 𝑚𝑚𝑚𝑚𝑚𝑚.

×7.48 𝑔𝑔𝑎𝑎𝑔𝑔𝑓𝑓𝑓𝑓.3

×43,560 𝑓𝑓𝑓𝑓2

𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎=

992 gpm pumping rate on an 18-hour/day duty cycle

iii. The pumping rate calculated in the previous step may be increased by up to 15% toaccount for pump wear.

iv. Oversized pumps (more than 15%) compared to permitted maximum annualwithdrawal rates are not allowed.

v. When the pumping rate on an 18-hour basis results in the ability to pump more AF/Ythan permitted, well operation is limited by ADWR permitted maximum annualwithdrawal rate. Such wells are not available year-round and additional supply maybe required.

vi. When the pumping rate on an 18-hour basis results in the ability to pump less AF/Y thanthe ADWR permitted maximum annual withdrawal rate, well operation is not limited



by the ADWR permitted maximum annual withdrawal rate. Such wells are available year round.

vii. Variable frequency drives (VFDs) are not allowed for the purpose of managing pumpingrate for maximum annual withdrawal permit compliance.

5. Well redundancy:

a. Firm water supply is required in all well fields serving a water campus.

i. A single fully redundant, equipped and idle well, connected to the transmissionsystem, equivalent in pumping capacity to the largest producing well, typicallysatisfies this requirement. For clarity in interpreting this requirement:

1. When the largest two wells are of similar capacity, one well will be considered tobe redundant to the other.

2. When the two largest wells are not equal in capacity, the smaller capacity well ofthe two will be used by the City to determine available supply, and the larger wellwill be considered to be the redundant well.

b. Paragraph 5(a) directly above is based on the assumption that the two wells are equivalentin terms of water quality and equivalent in terms of permitted maximum annual withdrawal.When water quality and permitted withdrawal are not equivalent, the City will assess thesituation and determine how the firm water supply requirement shall be achieved. The Citywill consider:

i. Well status, service area growth, blending schemes, aquifer declining yield, and waterquality degradation in the evaluation of available supply.

ii. The redundant well of sufficient yield and permitted withdrawal will need to operatewithout limitation in the event of the loss of the largest producing well.

c. When a substantial number of wells are installed that serve a single water campus,redundancy may be satisfied by providing 15% extra production.

i. The extra production required is in addition to the max day demand at buildout usingan 18-hour duty cycle accounting for wastage and reject utilizing the pumping rate thatis matched to maximum permitted annual withdrawal rate.

ii. The provision in paragraph 5(c) directly above is not available when the Citydetermines that sufficient supply is not available, or already in use. (i.e., the noredundancy available case).

iii. The phrase “substantial number” will have a different numeric interpretation fordifferent water campuses due to regional variations in well capacities, aquifercharacteristics, and development patterns.

iv. Extra production cannot be transferred between or amongst water campus or serviceareas.

Water Quality Goals and Requirements: A. The City, in order to accommodate naturally occurring source variability, and to ensure water

quality degradation does not pose an acute threat to public health, and that customers have desirable water quality requires treatment when blended raw or finished water concentrations of the following constituents exist;



1. Arsenic or nitrate concentration exceeds 70% of the MCL.

2. Fluoride concentration goal is to be between 1.4 and 2.0 mg/L to minimize public notice thatthe SMCL has been exceeded.

a. When treatment for fluoride does not exist and when the raw or finished waterconcentrations of fluoride are routinely above 2 mg/L, the City requires that a blendingstrategy utilizing existing wells be implemented or an alternative source, or additional wellwith lower fluoride concentration be brought into service.

b. Treatment may be required to deliver finished water within the City’s goal for fluoride.Water treatment campuses that are being planned may be capable of removing or managingfluoride concentration.

c. In no case will the City accept a fluoride level above 70% of the MCL without options tomitigate the well below the 70% level.

3. TDS (salts) are often present at relatively high concentrations in the aquifers. TDS has a SMCLwhich is a concentration level established for taste and aesthetic issues for public water supplybut are not enforceable levels.

a. The City has a long term goal to deliver finished water with TDS <500 mg/L and a nearterm goal of 800 to 1000 mg/L.

b. When RO treatment for TDS does not exist:

i. Acceptance of wells with concentrations higher than 900 mg/l will require a Cityapproved blending strategy. The City will consider the water quality in all of the wellssupplying, or planned, to supply a treatment campus in making the determination ofwhether the well can be accepted, or not.

1. If TDS exceeds 1,500 mg/L, the City will not accept the well in any situation.

2. If TDS is greater than 1,000 mg/L, the City requires consideration of a lesseramount of production through additional zonal exclusion to reduce TDS, or that analternate source, or additional well with less TDS be brought into service intandem, or that a pathway to achieve the City’s water quality goals must beachievable for the City to accept the well. The assessment of viability of a pathwayto achieve the City’s water quality goals is at the sole discretion of the City.

c. When RO treatment for TDS exists:

i. The City will not accept wells that have a TDS concentration that would exceed thedesign assumptions of the facility. Design assumptions will vary at each campus.

ii. The City will not accept wells that have a TDS concentration above 3000 mg/L due tothe waste stream discharge/disposal limitations and the excessive cost of the productwater and waste stream.

iii. Subject to limitation in 3(c)i directly above, Buckeye Water Conservation andDrainage District (BWCDD) drain wells and their replacement wells located in theBWLA are excluded from the requirement in 3(c)ii.

d. The City may require RO treatment be implemented at a regional water campus to reduceTDS before the well could be used.



e. Water treatment campuses that are being planned may be capable of removing ormanaging TDS concentration.

4. Requests for variances to the water quality requirements in this section shall be submitted forprior approval to the City Engineer as part of a Water Treatment Report that demonstrates theachievement of the water quality goals in this section.

B. Temperature for Public Acceptance and Distribution Pressure Pipe De-Rating Limit

1. Wells with water temperature greater than 95°F shall require treatment (i.e., blending orcooling) to reduce the temperature of the water delivered to the distribution system to 90°F.

2. Blending shall be the preferred treatment option in order to reduce water temperature in excessof 95°F, unless blending is impossible and an alternative treatment option is demonstrated tobe feasible.

3. Ambient heating in the distribution system (e.g. storage tanks) shall not be considered as acontributory factor of temperatures exceeding the maximum limit of 95°F.

4. Wells with temperatures greater than 95°F shall require consideration of the thermal de-ratingfactors for delivery piping and fittings in the design of the transmission piping from the wellfacility. The de-rating system from the pipe manufacturer shall be used in all designs.

C. Sand Production and Pump Wear Limits:

1. Excessive sand production in water pumped from a well can result in severe wear to the wellpump, center shaft, and subsequent pumping and storage equipment. It can also have an adverseeffect on treatment systems equipment, particularly R.O. systems.

2. Sand content shall be measured with the goal of an average not exceeding 5 mg/L or ppmproduced for a complete pumping cycle of 2-hours in duration when pumping at the designeddischarge rate and pressure.

a. No less than ten measurements shall be taken during post construction aquifer testing.

b. These measurements shall be taken at equal intervals to allow plotting of sand content asa function of time and production discharge rate in order to determine the average sandproduction during each cycle.

c. A Rossum™ Sand Tester or equivalent device which can measure sand content to a valueas low as 0.5 mg/L over a 10-minute period shall be used to measure sand productionduring the testing periods.

d. A City of Buckeye Water Resources Department representative shall be present duringany testing conducted in relation to water quality and sampling.

3. Wells with excessive sand production, or that have poorly settling or colloidal solids, will notbe accepted.

Well Performance Requirements: A. Limits on Yield (GPM)

1. The O&M costs for wells with lower yield can increase the cost per thousand gallons that theCity of Buckeye must charge to water customers. Therefore, the goal for yield for any well shallbe a minimum of 500 GPM.



2. Wells producing between 150 GPM and 499 GPM shall require special consideration andapproval.

3. The City of Buckeye shall not accept any wells producing less than 150 GPM for permanentmunicipal uses.

B. Pumping Lift (Elevation Head)

1. The cost of power required to lift water to the surface is affected by the static water level (thelevel of water below the ground surface prior to pumping) and the drawdown level (or pumpingwater level below the ground surface).

a. The pumping level and estimated elevation head shall be submitted to the City Engineeras part of the Well Completion Report.

b. Wells shall not exceed a depth of 1,500 feet without prior City authorization.

c. Any wells drilled to a depth of 1,501 feet or deeper shall submit a letter of variancerequest to the City Engineer for consideration.

C. Specific Capacity

1. Specific capacity is the rate of discharge of a well per unit of drawdown, commonly expressedin GPM per foot of drawdown (GPM/foot). Specific capacity is a useful indicator of a well’soverall performance. Specific capacity calculations shall be included in the Well CompletionReport and submitted to the City Engineer.

D. Well Location Restrictions:

1. Wells shall be no closer than 50 feet from existing or proposed sewers.

2. Wells shall be no closer than 100 feet from any source of potential contamination (e.g. sewagedisposal/pumping systems, septic systems, gasoline stations, commercial chemical storagetanks or facilities, livestock pens, horse facilities, animal boarding facilities etc.).

3. Any new well proposed to be located within 100 to 300 feet of a potential source ofcontamination shall require review and prior approval of the well location by the City Engineer.

4. Spacing of wells shall be in compliance with Arizona Administrative Code R12-15-1301through R12-15-1308 et seq. and may be amended from time to time.

5. Well sites shall not be located in designated floodways.

6. Wells and all ancillary and supporting equipment must be located outside of the 100-yearfloodplain, or adequately protected from flooding.

7. The site location, layout and size shall be designed to prevent adjacent structures or equipmentfrom impairing the safety of the personnel and from impeding the operation of the equipmentduring installation, operation, maintenance, repair, rehabilitation, or replacement of the well orrelated equipment (e.g. proximity to overhead high voltage power lines).

E. Wells shall be constructed to eliminate, to a practical extent, the need for treatment and/or blending.

F. Zonal groundwater sampling results and the lithology for each site and nearby wells shall be evaluated and wells shall be designed to reduce the concentration of contaminants.

G. Treatment shall be defined as any process, either mechanical (e.g., Coagulation-Filtration, Reverse Osmosis, Adsorption, etc.) or by blending, necessary to meet primary MCLs or finished water



quality goals. Wells with water quality exceeding the limits as outlined in Section 3-5.302 Water Quality must be addressed in a Water Treatment Plan.

H. Wells that require treatment shall consider a design and construction that provides the use of blending as the preferred method of treatment.

I. Variances may be considered for wells with water quality exceeding the thresholds as outlined in Section 3-5.302 Water Quality, or 70% of any water quality MCL. Variance requests may require submittal of forecasted water quality (e.g., groundwater model) to demonstrate no significant water quality degradation will occur.

J. Requests for variances to the water quality requirements in this section shall be submitted for prior approval to the City Engineer as part of a Water Treatment Plan that achieves the goals in this Section.

Well Casing and Screen Size Requirements: A. Well casings and screens shall be 16 inches in diameter at minimum, although 18-inch diameter is

preferred.

B. Well casing and screening arrangements that use perforated screens in both the Upper and Lower Alluvial Aquifers are prohibited based on the potential to degrade water quality.

C. For wells less than 500 feet in depth and less than 1,000 GPM a 16-inch casing and screen may be used. Pump clearances may require a larger casing.

D. For wells greater than 500 feet in depth or greater than 1,000 GPM an 18-inch or larger casing and screen shall be used. Pump clearances may require a larger casing.

E. Pump clearance is as follows: When the estimated flow rate of the well is determined an estimated pump size shall be determined. The designer shall provide a maximum outside diameter of the proposed pump. The well casing and screen ID shall be a minimum of 4 inches larger than the maximum outside pump diameter.

F. The well casing diameter shall be large enough to allow the pressing of a swage patching or a liner to be installed. The liner shall consist of new casing and well screen installed inside the existing casing. The diameter of the liner shall be large enough to allow ease of installation and removal of a vertical turbine or submersible pump and sounding tubes.

3-5.400 Well Construction:

Pilot Bore: A. The optimal, design, and construction of a service well for water quality and production purposes

shall be determined by drilling a pilot bore and conducting lithologic and geophysical logging, as discussed in the Sub-Sections below. The procedures for drilling the pilot bore (e.g. drilling method, depth, zonal sampling intervals, lithologic sampling) shall be submitted in writing in the Well Technical Specifications to the City Engineer for approval.

B. An appropriate number of lithologic samples shall be collected and retained during the pilot bore for submittal for grain size analysis to aid in final well design. The lithologic sampling program shall be outlined in the Well Technical Specifications to be submitted to the City Engineer.

C. An appropriate number of zonal samples shall be collected from the pilot bore and sent to a State of Arizona certified laboratory for analysis.



D. At a minimum, the zonal samples shall be analyzed for contaminants of local concern including but not limited to: arsenic, nitrates, fluoride, arsenic, TDS, pH, alkalinity, silica and other potential RO foulants.

E. The sampling program shall be included in the Well Technical Specifications to be submitted to the City Engineer.

F. Well Drilling:

1. The preferred well drilling methods for the new or replacement well shall be:

2. Dual Rotary Drilling (utilizing the pull-back method) is preferred in areas with high levels ofgroundwater and unstable soils.

a. This method is typically used by advancing exterior casing during drilling and thenadvancing a center drill shaft behind.

b. For the dual rotary method, two casing sizes must be specified; one for the casing duringdrilling the hole, and the other for the casing in the production zone of the well.

3. Reverse Circulation Rotary Drilling is preferred in areas where the best water quality oravailability of production is at depths greater than 1,000 feet.

G. A Well Technical Specification for drilling shall be submitted to the City for review and approval prior to any well drilling activity. The Specification shall include items listed in Section 3-5.100 Required Reports and Submittals.

1. Variances to the drilling methods specified above shall only be considered if the use of otherdrilling methods may be more favorable to the City of Buckeye for a particular situation orlocation.

Geophysical Logging: A. Geophysical logging of the borehole shall be performed to determine the lithology, top and bottom

of each distinct formation, differentiate between clean sand strata versus sand with silt or clay, provide an indication of water quality by measuring the apparent resistivity of materials surrounding the well bore, estimate the total porosity and relative porosity of various formations, and determine bedrock fracture patterns.

B. The following borehole geophysical logging methods are required:

1. Electrical logs (e-logs or electrical resistivity logs) combined with spontaneous potential (SP)logs

2. Natural Gamma logs

3. Caliper logs

4. Sonic logs, and

5. Deviation log.

C. The following borehole geophysical logging methods are optional but recommended:

1. Guard Resistivity logs

2. Temperature logs

3. Neutron logs, and



4. Spinner Flow Meter or Production logs.

D. In order to penetrate the outer steel casing when using the dual rotary drilling method, the required logging methods are neutron logs and natural gamma logs, but sonic logs are optional.

E. During drilling for a new well, all logging, pumping, development, sampling, testing, and completion shall be directed by an Arizona P.E. or R.G.

Well Drilling Exam for Sampling Protocol: A. During drilling, data for lithologic and geophysical logs shall be recorded by a qualified person

(Engineer, Geologist, Hydrogeologist, and/or Geophysicist).

B. The logs shall be reviewed and evaluated by an Arizona P.E. or R.G. with the appropriate experience from practice in Arizona depth-specific (zonal) groundwater sampling.

C. The evaluation by the registrant, with City Engineer approval, shall be the basis to determine the proper sampling protocol for optimal design of the well for water quality and water production.

Well Material Parameters: A. All materials in contact with water produced from the well, or additives, shall be certified by the

NSF.

B. All well designs shall comply with ADEQ Engineering Bulletin 10 Construction of Water Systems Guidelines (ADEQ, 1978).

1. All materials used in the well construction shall be specified in the Well Technical Specificationto be submitted, reviewed, and approved by the City Engineer.

C. Surface Casing

1. A minimum surface casing (conductor casing) penetration depth of 38 feet is required to protectthe wellhead from the infiltration of surface contaminants.

a. The surface casings shall extend 2 feet above finished grade.

b. The surface casing shall be constructed of LCS, or an approved equal, and the minimumwall thickness shall be 0.375 inches.

2. Subject to specific circumstances or site-specific conditions, the City of Buckeye reserves theright to require a change in surface casing material or to require deeper surface casingpenetration.

3. Refer to COB DETAIL 35403.

D. Annular Seal

1. The annular seal shall consist of neat cement, cement grout, cement-bentonite grout, or 3/8-inch maximum aggregate concrete unless prior approval has been obtained from the City.

2. The installation of 5 feet (minimum) to 10 feet (maximum) of fine filter sand (typically #20-#30 sand or #30-#40 sand, or as actual conditions may dictate) is required above the filter packbut below the bentonite seal, to prevent the bentonite from plugging or filtering into the filterpack.

3. A bentonite seal is required immediately above the filter pack. The bentonite seal should be 20feet in thickness maximum.



a. Refer to COB DETAIL 35403.

E. Blank Casing

1. The blank casing shall be constructed of type 304 stainless steel of minimum 0.312-inch wallthickness.

2. Compression sections (joints allowing 6’ feet of movement) shall be installed if the welllocation is in area identified on one of the following maps identified on the ADWR website:https://new.azwater.gov/hydrology/field-services/land-subsidence-arizona

a. Buckeye Land Subsidence Area (South of I-10; Johnson Rd. to Miller Rd.)

b. West Valley Area (North and South of I-10; Verrado to Perryville Rd.)

c. Other areas that become listed on the ADWR website after April 2021.

3. Wells are not to be located in areas with known fissures, or significant subsidence (>25 cm over10 years), based on the latest 10-year map on the ADWR website.

F. Well Screen Casing

1. Mills knife openings and wire wrapped screens are not permitted for new construction.

2. Louvered casing well screen shall be Roscoe Moss Ful-Flo constructed of type 316L stainlesssteel of minimum 0.375-inch wall thickness including a stainless steel “bull nose” section forthe bottom of the screen. The typical slot opening size ranges from 0.050 to 0.085 inches forwells installed in Buckeye. The slot size should be determined by comparison of the lithologiclog, downhole geophysical logs, and an adequate number of laboratory sieve analysesrepresentative aquifer sediment samples.

3. Other Roscoe Moss screens may be utilized with City Engineer approval if actual conditionswarrant.

4. Well screen water open area guidelines are as follows:

Type % of open area

Super-Flo Louvered Screen 10.1%

Ful-Flo Louvered Screen 3.4%

Standard Louvered Screen 1.0%

G. Annular Materials

1. A sounding tube shall be installed by the well driller in the annulus of the borehole (outside thewell casing).

a. This sounding tube shall be new Schedule 40 304L stainless steel with an ID of 1.5 or2.0-inches.

b. The bottom of the sounding tube shall be capped, and the lower 50 feet shall be perforatedwith 0.050-inch slots.

c. The sounding tube shall extend 50 feet below the top of the louvers, or when conditionsdo not allow this length to a depth recommended by the R.G.

https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fnew.azwater.gov%2Fhydrology%2Ffield-services%2Fland-subsidence-arizona&data=04%7C01%7Cjamesmiller%40buckeyeaz.gov%7C696bb05d91f84862c0ab08d8e4d6df9d%7Cd00735dfc5ba45c79384d7fc46c3f56c%7C0%7C0%7C637510958824295729%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3aHe8aPTx3PfKgiLElaZJzeC3oEJiIgk8lBso0Wwmls%3D&reserved=0



d. The sounding tube shall have an elevation tag indicating the elevation difference betweenthe top of the sounding tube and ground elevation to ensure the operators can measure anaccurate depth to water.

e. A submersible level sensor and indicator shall be installed in the annular sounding tube asshown in COB DETAIL 35510.

2. Casing centralizers (type 304 SS) shall be specified and included on the well casing atappropriate depth intervals.

3. A minimum 4-inch wide annular filter pack shall be installed between the well screen casingand the well borehole (i.e., borehole diameter shall be at least 8 inches greater than casingdiameter).

4. The filter pack shall consist of polished glass beads (e.g., Sigmund Lindner SiLi Beads 2.5 -3.5mm Article 451011RSiLi-NA (similar to a 6 x 8 mesh), or approved equal). The filter packsize should be determined by comparison of the lithologic log, downhole geophysical logs, andan adequate number of laboratory sieve analyses of representative aquifer sediment samples.The glass bead size should be larger than the slot size to ensure the glass beads are retained bythe louvered well screen slots.

5. A filter pack and filter pack installation method shall be specified in the Well TechnicalSpecification, but may be altered, with City approval, during the Well Completion DesignReport.

a. Filter pack shall be disinfected at the time of installation.

b. The filter pack shall extend a minimum of 10 feet above the top of the well screen.

6. A transition sand material shall be specified and installed above the filter pack.

a. The gradation may vary based on actual conditions. Typically, the gradation is 20 x 40mesh or 30 x 40 mesh.

7. A bentonite seal, a minimum 10 feet thick and a maximum of 20 feet thick shall be specifiedand installed above the transition sand material.

8. A neat cement or grout shall be specified and installed to completely fill the annular spacebetween the well casing and the borehole wall. The grout seal shall be emplaced via pressurepumping through a tremie pipe from the top of the bentonite seal to the ground surface.

9. All annular materials shall be specified in the Well Technical Specifications, to be sealed by anArizona P.E. or R.G. with the appropriate experience from practice in Arizona. The louver slotsize and filter pack size are to be selected after the pilot borehole is completed and the lithologiclog, geophysical logs, and sieve analyses are compared.

10. Refer to COB DETAIL 35403.

Well Development after Drilling: A. The well shall be initially swabbed and simultaneously airlifted or bailed, followed by pumping

and surging.

B. Well development will require a compressor capable of supplying air at 750 ft3/min and 350 PSI.

C. Air lifting will require a minimum 6-inch diameter eductor pipe with a minimum 1.5-inch ID airline.



D. Well development procedures, timing, and/or metrics shall be included in the Well Technical Specifications to be provided to the City Engineer for approval.

E. Well development shall be sufficient to meet AWWA Standards for sand content as defined in Section 3-5.302. C.

F. Following successful swabbing and air-lift development, the well shall be further developed by pumping and surging to remove additional fine materials.

G. A Rossum Sand Test (or approved equal) shall be installed to measure sand content during pumping and surging development.

Testing, Inspection, and Reporting: A. Tests shall be performed and recorded under the supervision of an Arizona P.E. or R.G. with the

appropriate experience from practice in Arizona.

B. A City of Buckeye representative shall be present during testing.

C. Tests conducted shall include but are not limited to the following:

1. Step-Discharge Pump Test (10-hour minimum):

a. Graphed as:

i. Drawdown level versus (vs.) time, and

ii. Specific drawdown vs. flow rate.

2. Constant rate aquifer test (48-hour minimum):

a. Graphed as:

i. Drawdown vs. time (Cooper/Jacob Plot)

ii. Residual drawdown vs. the ratio t/t* (Recovery Plot)

iii. Observed drawdown vs. time, and

iv. Observed residual drawdown vs. the ratio t/t*.

D. During aquifer testing, water samples shall be collected in accordance with a sampling protocol that meets the requirements of the MCESD and ADEQ.

E. Samples shall be tested by an Arizona certified laboratory for a full suite of contaminants (analysis for new sources sampling) required by MCESD and ADEQ for approval of the well as a drinking water source.

F. A New Groundwater Source Approval for the wells is required by the City of Buckeye prior to acceptance of the well by the City.

G. New Source Approval provided by MCESD is valid for 12 months; if the well is not put into production within 12 months, an additional sample must be collected by the developer or well owner.

H. A well plumbness and alignment test and a video survey following all testing shall be specified and performed.

I. A Well Completion Report shall be prepared by an Arizona R.G. that includes a narrative which describes the testing and inspection performed, a summary of the results, a diagram of the final as-



built well design based on the test results, and the raw data and graphs specified for each individual test. All criteria to be included in the Well Completion Report are summarized in a prior section in these standards.

3-5.500 Well Site Design and Equipping:

General Information: A. This section will discuss design requirements and materials for major components on a well site.

Well Site Plan: A. In addition to the City of Buckeye’s requirements set forth in this Standard a well site shall meet

all the minimum clear zone requirements as shown in COB DETAIL 35502 and COB DETAIL 35505.

B. Sufficient room shall be provided for a drill rig to be placed over a replacement well site, assuming a 12-foot by 60-foot footprint for the rig.

C. Equipment at the well site shall be placed such that the pump rig has clear access to the well head, the rig can approach well head from the drive gate, and the rig has sufficient room for the required turning radius as shown in COB DETAIL 35502 and COB DETAIL 35505.

D. Sufficient room shall also be provided for a pipe truck and support truck to be located near the drill rig.

E. Sufficient room shall be provided for City of Buckeye maintenance vehicles to access the original well, while the replacement well is being drilled.

F. The maximum allowable separation shall be established between a well and a replacement well (or future replacement well) location. A separation of less than 50 feet between a well and a replacement well (or future replacement well) location is not acceptable without approval by the City Engineer.

1. Spacing of wells shall comply with Arizona Administrative Code R12-15-1302.830 et seq andmay be amended from time to time.

G. All wells are to follow the well location restrictions as detailed in Section 3-5.303. D.

H. A variance request for the site specifications in the details shall be submitted and considered as part of the City Engineer’s approval of the Site Plan for the well site.

1. Justification for the variance shall be included within the narrative submitted with the Site Plan.

2. Justification for the variance must demonstrate that there is sufficient room for a drill rig, pipetruck, and support vehicle to drill a replacement well, while maintaining room for a City ofBuckeye maintenance vehicle access to the original well.

3. Justification for the variance must demonstrate that 50 feet of setback will be provided on anyside of the site that borders residential properties.

I. No well site shall be located under electrical lines or within any utility easements.

J. Access to the site shall be by vehicle access from City of Buckeye or County public street right-of-way to property owned by the City of Buckeye. No access shall be dependent upon easements across privately owned tracts of land, including homeowner association owned tracts (e.g., drainage areas, playgrounds, and retention basins) or private streets.



K. Site lighting shall be provided and shielded (both task lighting and general site lighting). Lighting shall be provided over the well head.

L. All site surfacing shall be constructed to support maintenance vehicle movement during all weather conditions, and retard growth of vegetation within the site. The interior area of the site shall have 3-inches of ¾”-minus AB only in traffic areas. The grade of the site shall provide for drainage away from the well head to the on-site retention basin.

M. The site finished grade should be elevated a minimum of one-foot above surrounding grade. The site elevation must be above the floodplain unless protected from, or not subjected to, floodplain conditions. If the site is located within the floodplain, it must be elevated a minimum of 2-feet above the 100-year floodplain level.

N. The site location, layout, and size shall be designed to prevent adjacent structures or equipment from impairing the safety of the personnel and from impeding the operation of the equipment during installation, operation, maintenance, repair, rehabilitation, or replacement of the well or related items.

O. A well site is required to be adjacent to an off-site retention basin or pipe must be provided to discharge water from the well site to the closest retention basin. The off-site retention basin must have the capacity to receive water from the well for 8-hrs/day and the ability to discharge the water.

P. Discharge and access easements shall be provided for pipe routes, basins, and washes to all adjacent basins or washes to which well sites are connected to or dependent on for operation.

On-Site Retention Basin: A. The grade of the site shall provide for drainage away from the wellhead.

B. The routing of well site drainage will be either off-site or to an on-site retention basin:

1. If the entire well site drains to an off-site retention basin, the drywell needs to be a minimumof 50’ from the well head.

2. If the entire well site drains to an on-site retention basin, the drywell needs to be a minimumof 100’ from the wellhead.

C. The on-site retention basin shall be constructed to provide for retention of a 100 year, 2-hour storm event, and 5 minutes of well start up pump-to-waste stream for three cycles per day plus flush water discharged from the desanding equipment.

D. The on-site retention basin shall include a drywell with indirect discharge from an adjacent sediment manhole structure.

1. Drywells shall conform to requirements found in the City of Buckeye Engineering DesignManual 5-1: Drainage.

E. The on-site retention basin shall provide a method of energy dissipation for startup/shutdown of well discharge waste flow to the retention area.

F. The side slopes of the on-site retention basin shall have a gradient of no more than 3 feet of length to 1 foot of depth.

G. The basin bottom and side slopes shall have a 4-inch minimum coverage of river rock.

H. The on-site retention basin design shall provide a means for mitigating overflow of the basin offsite in the least intrusive and damaging manner.



I. When the entire site drains off-site, on-site retention is still required for 5 minutes of pump to waste for 3 cycles per day plus flush water discharged from the desanding equipment.

Pump and Motor: A. Well Pump, General

1. Pumps shall be vertical turbine line shaft with center bearing column pipe with potable waterlubricated shaft.

a. Where a potable source for water lubrication does not exist, a submersible pump may beused.

b. Submersible pumps are also acceptable in conditions where sound attenuation is aconcern.

c. Submersible pumps are also acceptable and preferred when the vertical turbine pumpmust be installed in a pump gallery below the upper well screen perforations and whenthe pumping water level could drop below the top of the well screen perforations. Thesubmersible pump would prevent turbine lubrication from entering the perforations andfilter pack.

d. Oil lubricated vertical turbine line shaft pumps are prohibited where the water wouldsupply a treatment plant with membranes such as RO.

B. Vertical Turbine:

1. Pump, Column, and Line-shaft:

a. The pump shall be made of cast iron / bronze fitted with bowls made of cast iron grade 30.

b. The impeller, bolting, and strainer shall be made of type 316 stainless steel and the shaftshall be made of type 416 stainless steel.

c. The wear rings and bearings shall be bronze alloy.

d. The suction bell shall be cast iron grade 30 to match the bowls.

e. The impeller shall be statically and dynamically balanced per ISO 1940 G6.3 and shall beconnected to the shaft with a type 316 stainless steel lock collet.

f. The bowl bearings shall have a length equal to 2.5 times the diameter of the shaft.

g. The suction bell bearings shall also have a length equal to 2.5 times the diameter of theshaft as well as being permanently grease-lubricated with non-soluble grease.

h. The line shaft bearings shall be rubber with bronze integral bearing retainers at each jointand shall be water lubricated.

i. The line shaft and couplings shall be type 416 stainless steel in maximum lengths of 10-feet and sized for a critical speed equal to 120% of the max operating speed.

j. The line shaft couplings shall be threaded or keyed to the shaft.

k. The column pipe shall be threaded, constructed of ASTM A53 carbon steel pipe, not lighterthan schedule 30.

2. Well Motor:



a. The motor shall be 460-volt, 3-phase electrical power, 1800 RPM, premium efficiency.Motors that will be controlled by variable frequency drives (VFDs) shall be rated forinverter duty.

b. Motor noise abatement (screening) is required for vertical line shaft designs if the motorrating is above 300 HP, or for any motor, which is within 100 feet of residential or othernoise sensitive areas.

c. A noise level of 50 decibels shall not be exceeded at any private property line.

d. Submersible pump assemblies may be substituted for vertical line-shaft design in order toprovide noise levels at or below the 50-decibel level required at all residential propertylines. (This substitution shall be based on application and subject to prior authorization bythe City Engineer.)

3. Sounding Tube (installed by Pump Contractor)

a. A Schedule 40 PVC sounding tube (1-inch ID minimum) shall be provided and strapped tothe pump column.

b. The sounding tube shall be terminated 5 feet above the pump intake and shall consist of 10feet (minimum) 0.010 inch slotted PVC screen at the bottom, with a bottom plug in place.

4. Venting:

a. The wellhead shall contain a 2-inch screened vent pipe (Sheppard’s Hook)

C. Submersible Pump and Motor [RESERVED]

Sanitary Seal/Well Pad: A. The wellhead concrete pad/sanitary seal shall be designed to accommodate the weight of the pump,

motor assembly, line-shaft or pump column pipe filled with water, and all other forces acting on the pad.

B. The pad shall be a minimum of 12” inches of reinforced concrete.

C. The pad shall be no smaller than 10 feet by 10 feet square.

D. If there are to be sound enclosures the pad may be required to be enlarged to accommodate area to move the sound enclosures for well maintenance.

E. The pad shall be rotated at an angle to the discharge piping, if necessary, to provide the rig or maintenance vehicles square (perpendicular) access to the well head.

F. No equipment, piping, risers, or breather tubes shall protrude or be mounted in the working zone of the well pad.

G. The well head pad shall be sloped for positive drainage away from the well head.

Piping: A. Above ground piping shall be class 350, DIP with flanged and restrained joints. Above grade

piping is to be field painted.

B. Piping sizes of 10-inch, 14-inch, and 18-inch is not permitted.

C. All below grade piping shall be polyethylene wrapped, class 350 DIP, bell and spigot restrained joint from the above ground piping to the connection to the off-site transmission piping.



D. The above ground piping shall contain a minimum of 2 locations where the piping can be disassembled easily. These can be solid sleeves or dismantling joints, (rubber arch type fitting). In all cases these locations shall be restrained by using rods, not restraining glands.

E. A rubber arch type fitting with control rods is required immediately adjacent to the well discharge head.

F. All air release ports or air openings shall be screened to prevent insect intrusion. Screens shall be stainless steel. Pre-manufactured screen caps are acceptable; mesh size must be per MCESD requirements.

G. Pressure indicator and sensor units/lines shall be located upstream and downstream of the check valve at the discharge side of the pump for a true indication of pump and system discharge pressure and identification of check valve position.

H. Flow meters shall be used on the waste discharge piping and the well discharge piping.

1. All meters shall be an electromagnetic style and shall be provided to measure in units of 1,000US gallons per minute flow and totalization.

2. The meters shall also be able to send flow and totalization to the SCADA System.

3. The meters shall be manufactured by McCrometer.

4. Each flow meter shall have five pipe diameters of straight pipe upstream of the meter and twopipe diameters of straight pipe downstream of the meter.

I. Air valves are required at all high points in the piping:

1. One air release valve is required where the well line goes below grade.

2. One combination vacuum/air release valve shall be provided as close as possible to thewellhead. This valve shall be sized appropriately for air release during startup.

3. Air vacuum / release valves shall be manufactured by A.R.I.

J. Desanding Equipment:

1. Wells shall be equipped with desanding equipment prior to water being introduced into thewell transmission main.

2. Desanding equipment capable of removing particles with a specific gravity of 2.6 or largerand particles greater than 44 microns in size is required.

a. Lakos Series eJPX low profile, or approved equal.

3. Purge (aka flush or backwash) wastewater shall be managed by routing to a retention basin.

K. Provide a 2-inch tap and corporation stop as close as possible to the well head. This is to be used for disinfection during well rehabilitation or maintenance.

L. Provide a sample tap and valve as close as possible to the well head.

M. All taps into the well piping shall be made using a two-piece bronze tapping saddle.

N. Automatic control valves shall control pump discharge and pump-to-waste discharge.

1. The automatic control valves shall be manufactured by Cla-Val Company.

2. Automatic control valves shall be installed on the discharge piping prior to discharge into thetransmission piping system as well as on the waste discharge line.



O. Maximum velocity in the piping should not exceed 5 feet per second at the pump design flow rate.

P. In lieu of dismantling joints, rubber arched expansion joints with limit / control rods shall be provided.

Q. Tees with blind flanges shall be installed for future connections to sand separators.

R. Isolation valves shall be resilient wedge gate type and open to the left.

S. Exposed gate valves shall be of the rising stem style.

T. Gate valves shall be ductile iron in accordance with ANSI/AWWA standards.

U. Valves and piping shall be NSF-61 certified.

V. Refer to COB DETAIL 35506 for Wellhead Equipment Layout.

Electric Power Service/Stand-by Power: A. A stand-by generator with an automatic transfer switch shall be provided and sized to provide for

well motor startup without faulting and continuous water service delivery during electrical power outages.

B. A diesel fuel tank shall be sized to run continuously for 24 hours without load shedding.

C. Double containment shall be provided and sized accordingly in relation to the size of the fuel tank.

D. Generators shall be provided with sound enclosures.

1. The sound enclosures shall be designed to maintain a noise level not greater than 50 decibelsmeasured at the adjacent property boundary and to preclude the need for hearing protection atany location outside of the sound enclosure.

2. The enclosure shall be a Cummins Quiet Site Stage II, OR equal.

E. Electric utility transformers, service entrance sections, meter, and other appurtenances shall be located on the site but outside the block wall enclosure in order to enable meter reading and service to the utility equipment without the need for access to the facility. Refer to COB DETAIL 35502 for an example. Exterior access to the electrical utilities shall be a 24-foot double leaf gate and a 4-foot man gate for access to the site interior.

Electrical Building: A. Motor Control Cabinets must be located within a secured pre-fabricated electrical building

manufactured by Oldcastle that can be placed on concrete slab. The City of Buckeye has approved and standardized on the Model 1215, but is open to considering approval of other similar Oldcastle pre-fabricated structures.

B. Ideally, the electrical building doors shall open to the north and shall have line of site to the well head and pump assembly.

C. The electrical building shall be air-conditioned with two 3-ton air conditioning units, one unit redundant to the other. The Engineer shall verify that the capacity of the air conditioning units are appropriate for the service conditions and the geometry of the pre-fabricated structure.

D. The maximum size of the electrical building (Model 1215 RCS mono-building). is to be 14’ 6” (L) x 11’6” (W) x 9’ 8” (H). For smaller or different sized buildings, Oldcastle model numbers would



be different. If a smaller or different sized building is utilized, the Engineer will need to demonstrate compliance with all applicable codes.

E. The access door shall be secured with a card reader to allow or prevent access.

F. Fire suppression: Provide an electrically non-conductive, volatile, or gaseous fire extinguishing agent that does not leave a residue (clean agent style) fire protection system in circumstances where a hydrant is not close-enough. The clean agent shall be an FM-200 system, or approved equal.

G. The color of the building shall be beige.

Facility Security: A. The facility shall be secured by an 8-foot-tall fully grouted CMU block (8-inch by 8-inch by 16-

inch) wall to match color, style, and finish of adjacent development walls.

B. The CMU block wall shall be topped with a low-profile City approved spiked barrier, Ultra Barrier or Equal.

C. The facility shall be equipped with a 20-foot rolling security gate. The gate shall be anchored to the ground and not the CMU block walls.

D. The facility shall also be fitted with a 4-foot personnel gate for interior access.

E. The site shall have provisions for securing all doors, gates, and materials; entry and exit components shall be installed per the City of Buckeye’s Engineering Design Standards.

F. The site shall have a sign fastened to the access gate and door that lists the name of the site, physical address, City of Buckeye responsible phone numbers, the City well name/#, ADWR Well Identification Number, and Public Water System Number. The description and design shall be specified by the City of Buckeye’s Water Resource Department for each individual site.

Communication and Controls: A. Each wellsite shall be equipped with a local OIT and PLC that provides status, control, and alarms

associated with the well equipment, instrumentation, and control systems.

B. The well PLC shall be a CompactLogix unit manufactured by Allen Bradley.

C. The OIT shall be a maximum 10-inch screen PanelView unit manufactured by Allen Bradley PanelView Plus 7.

D. The well PLC is also connected via a 5 GHz radio communication link to the City-wide SCADA system.

E. The point to point radio shall be an Ubiquiti brand radio sufficient for the distance and service.

F. The remote SCADA has the same status, control, and alarming functionality as the local OI.

G. PLC and radio communication devices shall be designed for an input/output (I/O) count capable of handling two pumping wells; the first well at the site and its replacement until the first well is placed out of service, plus 20% for future changes and failed channels.

H. As a minimum, the following status and alarms are available both locally and remotely:

1. Pumped flow indication and totalization, low flow alarm.

2. Flow to waste indication and totalization.



3. Discharge pressure indication, high pressure alarm.

4. Power failure alarm.

5. Pump on/off status.

6. Pump fault alarm.

7. High motor winding temperature.

8. Generator on/off status.

9. Utility/standby power status.

10. Generator and Automatic Transfer Switch (ATS) data signals.

11. Well water level (sounding tube in annular space) indication.

12. Valve position.

13. Level of the reservoir, storage tank, or day tank that is receiving the well water.

14. Door and access control data signals.

15. Power quality meter data signals.

16. Emergency stop.

I. The following equipment can be controlled both from the local OIT and the remote SCADA.

1. Provide local alarm indication on the OIT.

2. Provide alarm summary list on the OIT.

3. Well pump start/stop,

4. Generator start/stop.

J. Furnish all programming code with descriptions and labels attached to all tags for the PLC, OIT, and any other programs used to integrate the equipment on-site.

K. Each site shall be equipped with a communication tower or antenna of sufficient height and design to communicate with a remote site to be designated by the City Engineer. A desktop or field line of sight/radio-path study will be conducted for each well site.

L. All wells shall be equipped with a permanently mounted level transducer per detail 35510.

Design Plans and Specifications: A. All well facility plans and specifications shall be sealed by an Arizona P.E. Specifications shall

include general contract requirements and technical specifications.

B. Drawings shall include the following features, at a minimum:

1. Site plan, with easements.

2. Retention basin,

3. Drywell,

4. Pump and motor (well head),

5. Future (replacement) well head,



6. Sanitary seal/well pad,

7. Piping and valves,

8. Transformer, Electrical Switchgear, ATS, and Motor Control Center

9. Standby generator,

10. Site security and enclosures,

11. Communication and controls, and

12. Other civil, structural, or architectural items as needed.

Existing Wells:

Known Construction without Previous Use: A. Wells of known construction that have not yet been placed into operation within a year of

construction completion will need to be evaluated on a case by case basis.

B. All available well construction, water quality, and ADWR permit related information are to be provided to the City.

C. Upon request to the City Engineer and assuming the well is constructed to these or previous City engineering design standards, the City will prepare a requirements letter that will identify the following:

1. Requirements associated for well acceptance, if acceptance is possible, that address cleaningand preparation of the well, and treatment. New water quality data for constituents of concernwill be required if existing data is more than 90 days old.

2. Well transmission line point(s) of connection and hydraulic parameters.

3. General coordination aspects and constraints, if they exist.

Unknown Construction or Previous Use: A. Wells of unknown construction or previous non-municipal or non-domestic drinking water supply

use, including agricultural wells, shall only be considered for temporary non-potable use. Requests to temporarily use wells shall be submitted to the City Engineer for approval.

B. All existing wells that are to be used for developments shall be re-drilled according to these standards before they can be used in the municipal system.

C. The City will not consider the use of an existing well owned by entities other than the developer.

D. The City will request proof of ownership.

Use Restrictions for Construction Water : A. A well is not allowed to be used for any purpose, including construction water, until the well is

completed and accepted by the City.

B. Temporary power arrangements to enable production of construction water is prohibited.

C. Electrical provisions and piping connections related to construction water are required to be reviewed and approved by the City and are to be fully described within the plans and specifications.



Closeout:

Wellsite Improvement Closeout: A. All construction closeout activities and documents shall be per the City’s requirements as listed in

the Construction Closeout Section of the Engineering Design Standards.

[END OF SECTION]



Appendix 1 Standard Details

35403 Well Detail

35502 Well Site Layout and Clear Zone Requirements

35505 Well Head Equipment Layout

35506 Well Head Equipment Layout, Isometric

35510 Submersible Level Sensor

City of BuckeyeStandard Details WELL DETAIL 35403

Revised:

05-18-21Detail:35

403

C

F

A

B

D

K

J

H

I

G

E

L

M

N

A 10'x10'X12" SANITARY SEAL/CONCRETE WELL HEAD PAD, 12"

MINIMUM THICKNESS PITCHED AWAY FROM WELL HEAD FOR

DRAINAGE.

B 40' LOW CARBON STEEL (ASTM A53 GRADE B) SURFACE CASING -

38' PENETRATION, 36" DIAMETER. A.K.A. CONDUCTOR CASING,

0.0375" WALL THICKNESS, 46" BOREHOLE

C DIAMETER BLANK CASING, 304SS, 0.312" WALL THICKNESS.

D MAXIMUM 20' THICK BENTONITE ANNULAR SEAL.

E NEAT CEMENT GROUT SEAL.

F SOUNDING TUBE, 1.5" (ID) SCH 40 304 SS, BOTTOM 50' PERFORATED

WITH 0.050" SLOTS AND CAPPED.

G MINIMUM 4" FILTER PACK WIDTH. SiLi BEADS OR CITY ENGINEER

APPROVED EQUIVALENT REQUIRED.

H BULL NOSE CASING BOTTOM.

I BENTONITE SEAL BASE.

J LOUVERED CASING, 316 SS, 0.375" WALL THICKNESS, SLOT

SIZE PENDING PILOT BOREHOLE ANALYSIS.

K 10' OF TRANSITION SAND.

L 1" ID MINIMUM PVC SOUNDING TUBE. TERMINATE 5' ABOVE PUMP

INTAKE. BOTTOM 10' IS 0.010" SLOTTED SCREEN WITH BOTTOM

PLUG.

M COVER PLATE AND ACCESS PORT.

N 2" SCREENED VENT PIPE (SHEPPARD'S HOOK) WITH THREADED

COUPLING AT TOP OF CONCRETE.

City of BuckeyeStandard Details

WELL SITE LAYOUT & CLEAR ZONE REQUIREMENTS35502

Revised:35502 05-18-21

Detail:

A LARGER FORMAT

DRAWING (24"x36")

WITH KEYNOTES AND

TEXT IS AVAILABLE FOR

USE. SEE DETAIL 35502.

City of BuckeyeStandard Details WELL HEAD EQUIPMENT LAYOUT 35505

Revised:35505 05-18-21

Detail:

6

PLAN VIEW

1 PUMP MOTOR AND DISCHARGE HEAD

2 6' DIAMETER WORKING ZONE

3 SOUNDING TUBE (W/ RECESSED THREADED PLUG)

4 GROUND ROD W/ BOND WIRE-TO DISCHARGE HEAD

5 BREATHER TUBE

6 POWER RISER CONDUIT & JUNCTION BOX

7 DISCHARGE LINE

8 10' X 10' X 12" CONCRETE PAD MINIMUM - SEE NOTE #3

9 SEAL TIGHT FLEXIBLE CONDUIT WIRE WHIP FOR POWER

TO WELL PUMP MOTOR.

10 POTABLE WATER LUBRICATION FOR LINE-SHAFT PUMP

IS NOT SHOWN.

GENERAL NOTES:

1. NO EQUIPMENT, PIPING, RISERS, BREATHER TUBES SHALL

PROTRUDE IN WORKING ZONE AREA OF WELL PAD.

2. EQUIPMENT SHALL BE PLACED SUCH THAT PUMP RIG HAS

CLEAR ACCESS TO THE WELL HEAD AND CAN BE

APPROACHED FROM DRIVE GATE OF WELL SITE.

3. WELL PAD SHALL BE SLOPED FOR POSITIVE DRAINAGE AWAY

FROM WELL HEAD.

PERMANENT LEVEL

TRANSDUCER PER DETAIL.

FLEXIBLE CONDUIT FROM

JUNCTION BOX.

5

4

3

2

1

8

7

9

10

City of BuckeyeStandard Details WELL HEAD EQUIPMENT LAYOUT 35506

Revised:35506 05-18-21

Detail:

A LARGER FORMAT DRAWING

(24"x36") WITH KEYNOTES AND

TEXT IS AVAILABLE FOR USE. SEE

DETAIL 35506.

City of BuckeyeStandard Details SUBMERSIBLE (HYDROSTATIC) LEVEL SENSOR 35510

Revised:35510 05-18-21

Detail:

A LARGER FORMAT DRAWING

(24"x36") WITH KEYNOTES AND

TEXT IS AVAILABLE FOR USE. SEE

DETAIL 35510.

well sites - buckeyeaz.gov

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