041823 Hydrogeological Services for Well 6 Rehabilitation and On-Call Services ENGEO Proposal — City Council - Successor Agency

RFP# 4385
Hydrogeological Services + On-Call Services
City of Fullerton – Purchasing
Attn: Karen Chung, Buyer

SUBMITTED TO
K
aren Chung, Buyer
City of Fullerton
Purchasing Division
303 W. Commonwealth Ave.

Fullerton, CA 92832
January 27, 2023

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

January 27, 2023

TABLE OF CONTENTS

1.0 LETTER OF TRANSMITTAL ............................................................................... 1

2.0 PROPOSER QUALIFICATIONS .......................................................................... 3

2.1 ENGEO ................................ ................................ ................................ .......................... 3

2.2 FIRM FINANCIAL CONDITION................................ ................................ ....................... 3

2.3 PROJECT DESCRIPTIONS AND REFERENCES ................................ .......................... 3

2.4 EXPERIENCE WITH VARIOUS GOVERNMENT AGENCIES ................................ ......... 5

2.5 PREVIOUS WORK WITH SUBCONTRACTORS ................................ ............................ 6

3.0 PROPOSED STAFFING AND ORGANIZATION ................................................. 7

3.1 BUDGET AND SCHEDULE CONTROL ................................ ................................ .......... 7

3.2 KEY PERSONNEL STATEMENT ................................ ................................ ................... 8

3.3 ORGANIZATIONAL CHART ................................ ................................ ........................... 8

3.4 RESUMES ................................ ................................ ................................ ..................... 8

4.0 DETAILED WORK PLAN AND IMPLEMENTATION SCHEDULE ...................... 8

4.1 WELL 6 REHABILITATION ................................ ................................ ............................. 8

4.1.1 Data Collection, Review, and Analysis................................ ................................ 9

4.1.2 Design Services ................................ ................................ ............................... 10

4.1.3 Construction Support Services ................................ ................................ ......... 10 Task A: Well Rehabilitation Field Services (Inspection Services) ...................... 10 Task B: Summary Report ................................ ................................ ................. 11

4.2 SAMPLE TECHNICAL SPECIFICATION FOR WELL REHABILITATION ...................... 12

4.3 ON-CALL HYDROGEOLOGICAL SERVICES ................................ ............................... 12

4.3.1 Water Well Assessment ................................ ................................ ................... 12

4.3.2 Water Rehabilitation Design ................................ ................................ ............. 12

4.3.3 New Well Design, Construction Observation and Documentation ..................... 12

4.3.4 Well Destruction Design, Construction Inspection, and Documentation ............. 13

4.3.5 Well Siting Studies and Phase I Environmental Site Assessments .................... 13

4.3.6 Grant Writing Assistance ................................ ................................ .................. 14

4.3.7 Preparation of Drinking Water Source Assessment and Protection Reports (DWSAP) ................................ ................................ ................................ ......... 14

5.0 FEE PROPOSAL ............................................................................................... 14

5.1 UNDERSTANDINGS ................................ ................................ ................................ .... 14

5.2 ON-CALL HYDROGEOLOGICAL SERVICES ................................ ............................... 14

5.3 WELL 6 REHABILITATION ................................ ................................ ........................... 15

5.3.1 Well 6 Rehabilitation Fee Proposal ................................ ................................ ... 16

6.0 REQUIRED FORMS ........................................................................................... 17 APPENDIX A: RESUMES .................................................................................. 21 APPENDIX B: SAMPLE TECHNICAL SPECIFICATIONS FOR WELL
REHABILITATION ............................................................................................. 28

GEOTECHNICAL

ENVIRONMENTAL

WATER RESOURCES

CONSTRUCTION SERVICES

COASTAL/MARINE GEOTECHNICS

320 Goddard Way, Suite 100  Irvine, CA 92618  (949) 529-3479  Fax (888) 279-2698 www.engeo.com
Project No.
21859.000.001
January 27, 2023

Ms. Karen Chung, Buyer
Purchasing
City of Fullerton
303 West Commonwealth Avenue
Fullerton, CA 92832

Subject: Proposal for Hydrogeologic Services Well No. 6 Rehabilitation and On-Call Hydrogeological Services
City of Fullerton, California

1.0 LETTER OF TRANSMITTAL

Dear Ms. Chung:

We are pleased to submit this proposal to provide well assessment and rehabilitation services for the City of Fullerton’s (City) Well 6, located at 627 La Palm a Avenue in Anaheim (Main Plant); and for the on -call hydrogeological services for City well -related needs for the next five years .

ENGEO has extensive experience in municipal well planning and design, well assessments, well rehabilitation plans, and field oversight of new well construction, well rehabilitation, and well repair. Our corporate identity is ENGEO, Inc. Our corporate address is 2010 Crow Canyon Place, Suite No. 250, San Ramon, California, 94583.

Rehabilitation of Well 6 is key to continue providing the City with efficient, reliable groundwater supplies. Well 6 was drilled in 1959 and constructed using assumed mild steel to a depth of 430 feet with assumed louvered perforations from 340 to 400 feet. No records or as-builts were found for Well 6 by the City. The City is rehabilitating Well 6 to restore well production, improve specific capacity, and reduce energy consumption.

Additionally, we understand that the City is requesting qualifications for on -call hydrogeological services for additional well assessments and well rehabilitations. As noted in the RFP, the City owns eight operating wells, with two wells offline that require well rehabilitation prior to returning to service. ENGEO brings extensive experi ence providing hydrogeologic and construction management services for well assessment and rehabilitation plans. We have experience evaluating the condition and yield of older wells and preparation of well rehabilitation or repair plans. ENGEO also provides services related to the groundwater resource evaluation, planning, preliminary and final design, formation sampling, geologic logging, construction observation, development, and testing of new municipal supply wells.

Our proposal outlines our scope of work and fees to provide the required hydrogeologic services for Well 6 and on-call hydrogeological services. The billing rates are applicable for 18 months. Our proposal is valid for a period of 180 days from January 27, 2023.

ENGEO’s Project Manager and Principal hydrogeologist, James Thurber, has worked closely with several municipal clients in the Orange County Groundwater Basin and has direct insight of the City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

well rehabilitation conditions and challenges found in the basin. He will work closely with City staff to evaluate the well condition and develop recommendations for chemical treatment and, if necessary, installation of swage patches or a liner. ENGEO will work closely with the City during well assessment and field activities related to Well 6. James is in ENGEO’s Irvine office located at 320 Goddard, Suite 100, Irvine, California, 92618. His email is [email protected] and his cell phone is (714) 745-4999.

We propose using Pacific Services, LLC as a subcontractor to provide video and geophysical surveys. Pacific Surveys is owned and operated by Michael Ritter and is located at 4456 Via Ambrose, Claremont, California, 91711, and can be reached at (909) 625 -6262. For well and pump services, we propose using Best Drilling and Pump, Inc (Best), a C -57 licensed well contractor. Best is located at 1640 West Pellisier Road, Colton, California, 92324 and can be reached at (951) 684-1952. Best is owned and operated by Mark Best. For groundwater quality testing, we propose using Weck Laboratories, Inc. (Weck), located at 14859 Clark Avenue, City of Industry, California, 91745. The ENGEO project manager at Weck is Rahul Nair, and can be reached at (626) 336-2139 ext.102.

We have reviewed the Scope of Work for the project as outlin ed in the Request for Proposals (RFP #4385 ) issued December 22, 2022 . and associated Addendums #1 and #2. We are prepared to provide the necessary personnel to complete the well rehabilitation and construction management services. We understand that the City prefers rehabilitation work be conducted from October 2023 through March 2024, with data review to begin in February 2023. We understand that the City is using an Urban and Multi -Benefit Drought Relief Grant Program to support the Well 6 rehabilitation project, and that Well 6 must be back in service by July 31, 2024 to meet the grant deadline.

We will manage the Well 6 rehabilitation project with priority and are prepared to provide as - needed hydrogeological services for other well rehabilitation projects simultaneously, if needed .

We are committed to the success of your projects and the needs of the City. With our curr ent workload, we can manage your projects comfortably and with priority. We look forward to reviewing the City’s Professional Services Agreement and discussing our requested edits. Should you have any further questions or would like to obtain additional in formation, please do not hesitate to contact me by phone or email. We appreciate the opportunity to submit this proposal and look forward to working with you on this critical project. All information submitted with this proposal is true and correct.

Sincerely,

ENGEO Incorporated

Emma Griffie, GIT James Thurber, PG, CHG
Staff Geologist Principal

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City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

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2.0 PROPOSER QUALIFICATIONS

2.1 ENGEO

ENGEO is pleased to submit our qualifications to support the City’s hydrogeological services during planning and field services activities. Our varied experience with well assessment, developing rehabilitation plans and specifications, and providing field oversight of each phase of rehabilitation is directly applicable to City’s current and future groundwater well projects. Founded in 1971, ENGEO is an award-winning, employee-owned California Corporation of more than 350 geotechnical and civil engineers, ge ologists, hydrogeologists, environmental scientists, water resources experts, field representatives, laboratory testing specialists, and supporting staff.

ENGEO staff recently completed well assessment and rehabilitation plans for four wells in Costa Mesa, four wells in Beverly Hills, and two wells in Corona. ENGEO is currently working with OCWD on well rehabilitation planning for two Fullerton wells. Our approach to well assessment includes review of well production data, specific capacity trend, sand p roduction, and water quality, followed by video survey inspection and casing thickness logging. Water quality testing may be necessary for inactive wells and to characterize the microbiologic activity. These data are used to prepare comprehensive plans for mechanical and chemical treatment, followed by redevelopment and testing. We completed installation of a full -depth stainless steel screen and casing liner to effectively reconstruct a severely corroded well. Additionally, ENGEO staff recently completed new municipal well construction for East Orange County Water District (Vanderwerff Well) and destruction of an existing well.

ENGEO Principal and Project Manager, James Thurber has provided hydrogeologic services and design of high-capacity municipal supply wells throughout southern California for 36 years. Our team is experienced with thorough well assessments and preparing chemical treatment plans and specifications for rehabilitation of municipal supply wells. Overall, our hydrogeological experience related to groundwater resource characterization, protection, development, and replenishment will provide the City with a team of knowledgeable geologists and engineers that can provide innovative solutions to your groundwater projects.

2.2 FIRM FINANCIAL CONDITION

ENGEO does not have any negative financial conditions or activities that will impede our ability to complete this contract. ENGEO has no pending legal issues or pending litigation against the firm or principals.

2.3 PROJECT DESCRIPTIONS AND REFERENCES

HYDROGEOLOGIC SERVICES, WELL REHABILITATION, WELL NOS. 1, 3, 5 AND 7 COSTA MESA, CALIFORNIA; Client: Mesa Water District
As part of the Mesa Water District Well Automation Project, ENGEO performed an evaluation of well performance and well condition for each well. Reduced well performance and sanding conditions were noted in some wells and no wells had been cleaned for more than 20 years. One well required a swage patch across a sounding tube opening and cement plug at the bottom.

Noting the age, variable casing materials, and perforation types (louvers and wire wrap screen), and very fine -grained character of most of the aqu ifers, ENGEO developed the technical specifications for well cleaning by physical and chemical methods, followed by redevelopment and testing of each well. The first step of rehabilitation was to complete a color video survey City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 4 January 27, 2023
following removal of the perma nent pump. Generally, the video surveys revealed moderate to heavy biofouling and plugging of the louvers or wire-wrap screen in the wells that ranged in age from 18 to 45 years. Following brushing with biocide, chemical treatment was completed in two steps using phosphoric acid with enhancer and then chlorine plus enhancer, designed to remove the biofouling and mineral scale in the well, filter pack, and bore wall. Each chemical treatment was removed by double swab airlifting and neutralized in above -ground tanks prior to disposal.

Following the chemical treatment, the well was redeveloped using a 10-foot-long double swab to airlift the entire length of well screen. Generally, a significant amount of fine sand and silt was removed from the filter pack of each well. The final step consisted of pumping development and pumping tests, followed by well disinfection with sodium hypochlorite. After disinfection of the well, a final video survey was completed to document the overall condition of the interior of the casing and screen. Sand production was persistent in some wells above a pumping rate threshold, which was carefully identified during pumping development. Pumping tests revealed small to moderate improvements in specific capacity and acceptable levels of sand in wells that produce high quality groundwater suitable for municipal supply.

HYDROGEOLOGIC SERVICES, WELL REHABILITATION, WELL NOS. 2, 4, 5 AND 6 BEVERLY HILLS, CALIFORNIA; Client: City of Beverly Hills ENGEO performed an evaluation of well performance and well condition for each well. Reduced well performance and sanding conditions were noted in some wells and no wells had been cleaned since new in 1997 to 2000. The well assessments noted the local water quality concerns related to hydrogen sulfide odor and the presence of iron sulfide at the City’s groundwater treatment plant, the overall good condition of the stainless -steel casing and louver perforations, the reduced capacity, and tendency for producing excessive fine sand on start up . ENGEO developed the technical specifications for well cleaning by physical and chemical methods, followed by redevelopment and testing of each well. The first step of rehabilitation was to complete a color video survey following removal of the permanent pump. Genera lly, the video surveys revealed minor biofouling and plugging of the louvers and local staining related to iron bacteria.

Following brushing with biocide, chemical treatment was completed in two steps using phosphoric acid with enhancer and then chlorine plus enhancer, designed to remove the biofouling and any mineral scale in the well, filter pack, and bore wall. Each chemical treatment was removed by double swab airlifting and neutralized in above -ground tanks prior to disposal. Following the chemical treatment, the wells were redeveloped using a 10 -foot-long double swab to airlift the entire length of well screen. Generally, a significant amount of fine sand and silt was removed from the filter pack of each well. The final step consisted of pumping develo pment and pumping tests, followed by well disinfection with sodium hypochlorite. After disinfection of the well, a final video survey revealed significant improvement in the overall condition of the interior of the casing and screen. Sand production was gr eatly improved in all wells. Pumping tests revealed improvements in specific capacity and acceptable levels of sand in all wells.

HYDROGEOLOGIC SERVICES AND WELL LINER DESIGN, WELL NO. 19 CORONA, CALIFORNIA; Client: City of Corona Department of Water and Power ENGEO completed a review of the background data and downhole video survey of a 25-year-old well that was suffering from severe casing corrosion, low yield, and sand production. ENGEO prepared the plans and specifications for installation of a liner and chemical rehabilitation. Due to aggressive water the original mild steel casing and screen were corroded and a new full -depth stainless steel liner with filter pack and new cement seal were required to restore reliable production and extend the life expectancy. The new liner was installed after carefully removing fill from the bottom of the well. The liner assembly and all rehabilitation work had to be handled with a crane and lowered through a roof hatch. ENGEO developed the technical specifications for the City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

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liner, construction, and well cleaning using physical and chemical methods, followed by redevelopment and testing. Chemical treatment was completed in two steps using hydrochloric acid with enhancer and then chlorine plus enhancer, designed to rem ove the biofouling and mineral scale in the original well, filter pack, and bore wall. Each chemical treatment was removed by double swab airlifting and neutralized in above -ground tanks prior to disposal. Following the chemical treatment, the wells were r edeveloped using a 10 -foot-long double swab to airlift the entire length of well screen. The final step consisted of pumping development and pumping tests, followed by well disinfection with sodium hypochlorite. No sand was observed during the pumping tests and specific capacity was improved.

2.4 EXPERIENCE WITH VARIOUS GOVERNMENT AGENCIES

NAME AGENCY CONTACT INFORMATION WELL

PROJECT

CONTRACT

VALUE KEY PERSONNEL
Karyn Igar Mesa Water
District
[email protected]
(949) 631-1291

Rehabilitation of
Well Nos. 3B, 5, 7B,
and 1B
$97,000
James Thurber
Jennifer Knipper
Emma Griffie
Dennis
Phinney

Chase
Michelotti
Corona
Department
of Water
and Power
[email protected]
(949) 929-2760

[email protected]
(951) 736-2276
Rehabilitation and
Repair of Well No.
19 $45,000 James Thurber
Jennifer Knipper
Vince
Damasse
City of
Beverly
Hills
[email protected]
(310) 285-2491
Rehabilitation of
Well Nos. 2, 4, 5,
and 6

$200,000
James Thurber
Jennifer Knipper
Emma Griffie

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

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2.5 PREVIOUS WORK WITH SUBCONTRACTORS

SUBCONTRACTOR CONTRACT NAME ROLES AND RESPONSIBILITIES
Pacific Surveys, LLC
New Well Construction
Mid-Basin Injection Wells
SAR-12 and SAR-13
Sunset Gap
Vanderwerff Well

Well Rehabilitation
Well Rehabilitation and
Automation
City of Beverly Hills
City of Corona
Provided geophysical and video surveys for new well
construction and rehabilitation. Videos were in color
with downhole and side scan view and conducted in a
static or dynamic environment. Geophysical surveys
included short and long wave gamma surveys,
gyroscopic deviation surveys, caliper surveys, spinner
surveys, and dual induction surveys. Assisted with
depth-specific sampling.

Provided geophysical and video surveys for new well
construction and rehabilitation. Videos were in color
with downhole and side scan view and conducted in a
static or dynamic environment. Geophysical surveys
included cement bond long (CBL) surveys, casing
thickness inspection (CITM) surveys, caliper surveys,
and spinner surveys.

Best Drilling and Pump, Inc.

New Well Construction
Mid-Basin Injection Wells

Well Reconstruction and
Rehabilitation
Corona Well 19
City of Corona
Well contractor who drilled new production and
monitoring wells using reverse circulation methods.

Responsible for maintaining a providing and installing
sound barriers, setting up discharge piping, providing
steady drill rate, providing a well-functioning sample
box for ENGEO geologist to grab formation samples,
disposal of formation samples and fluids, conducting
Eastman drift surveys, monitoring drilling fluid
properties, ordering well construction materials per
well design by ENGEO, and constructing the new
well. Best installed a full-depth stainless steel liner, filter pack, and sanitary seal. After well construction was complete, Best performed chemical treatment
and mechanical redevelopment utilizing dual swab
airlifting. Provided and installed test pump for
pumping development and pumping test.

Well contractor who performed well rehabilitation and
liner installation at Corona Well 19. Utilized crane to access Well 19 through housing enclose to perform
rehabilitation activities. Assisted Pacific Surveys in
setting up tooling on crane to perform video and
geophysical surveys. Provided new brush tool and
new dual swab tool per ENGEO request. Provided
ENGEO requested acid, chlorine, and catalyst
chemicals. Mixed chemical in a safe manner,
ensuring proper safety techniques and gear were
utilized by Best staff, City staff, and ENGEO staff.

Constructed discharge pipeline to multiple resting
tanks for discharge treatment prior to disposal
following NPDES permit. Provided safe access to
discharge line for ENGEO staff to collect water
samples during airlifting activities. Provided and
installed test pump for pumping development and
pumping test.

Weck Laboratories, Inc. Mission Village Specific Plan Laboratory analysis for quarterly water sampling

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3.0 PROPOSED STAFFING AND ORGANIZATION

ENGEO offers clients a project management approach that is straightforward and communicative.

We offer a multi-disciplined project team that can handle issues that may arise. The objective of our management approach is to ensure technically proficient, timely, and cost-effective execution of the project. To provide services that are responsive to the defined needs while maintaining the technical qua lity of the final deliverables and budget/schedule control . ENGEO’s project management approach is designed to include the following features:

• Single point of client contact and accountability
• Proactive communication among all project participants regarding scope and approach • Appropriate staff assigned based on project scope and areas of expertise • Immediate response to client calls and emails
• Flexibility to expand or contract services in response to project needs • Direct technical review and QA/QC involvement for all deliverables • Highest corporate commitment to the project

3.1 Budget and Schedule Control

ENGEO professionals understand the importance of your timeline, budget, and successful results, and pride ourselves in meeting them. We achieve shared project success by thoroughly understanding the project goal s, facilitat ing effective and frequent communication, and incorporating well-defined and efficient approach es to accomplish project milestones . We routinely look beyond the immediate tasks and anticipate challenges and deadlines.

Project manager and lead hydrogeologist, James Thurber, has worked closely with Orange County municipal well owners since 1986. Mr. Thurber has direct insight of the well rehabilitation conditions and challenges found in the Orange County Groundwater Basin . Based on his previous field hydrogeology, drilling, and well rehabilitation experience, he understands how to navigate the unique challenges each well has for successful and complete well rehabilitation. Our ENGEO team of hydrogeologists have completed ten well rehabilitation projects in the past five years. Key staff proposed for the Well 6 rehabilitation are presented in the table below.

NAME YRS EXP PERCENT OF

PROJECT AVAILABILITY LOCATION
James Thurber, PG, CHg
Project Manager/Principal
Hydrogeologist
36 25% 30% Irvine, CA
Emma Griffie, GIT
Staff Geologist
5 100% 100% Irvine, CA
Jennifer Knipper, GIT
Staff Geologist
5 100% 100% Irvine, CA

Consistent site visits and full-time observation during critical tasks by our experience team allows for efficient communication and prompt identification of problems for even faster solutions. We will provide daily progress updates to the City project manager. Addit ionally, efficient, frequent, and honest communication with our subcontractors is critical for utilizing appropriate and effective methods of work. Our previous experiences with both Pacific Surveys and Best have helped us build honest relationships with our subcontractors.

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

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3.2 KEY PERSONNEL STATEMENT

Our team will be available to the extent proposed for the duration of the contract, and no person shall be removed or replaced without 5 days advanced written notification to the City when practical.

3.3 ORGANIZATIONAL CHART

Our organizational chart depicting lines of communication is presented below.

3.4 RESUMES

Resumes are included in Appendix A.

4.0 DETAILED WORK PLAN AND IMPLEMENTATION SCHEDULE

4.1 WELL 6 REHABILITATION

We propose the following scope of services based on the Request for Proposals (RFP #4385) and Addendums #1 and #2. We understand that work for Well 6 rehabilitation is scheduled to begin on or around February 2023 and to be entirely completed no later than July 2024. We recommend the initial well work begin in October 2023 to ensure the rehabilitation and testing are completed to provide the data needed for design of the new pump, motor, and discharge pipe modifications. This approach is intended to accommodate long lead times on new equipment and allow Well 6 to be operational by July 2024.

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

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4.1.1 Data Collection, Review, and Analysis

Well 6 was constructed in 1959 by unknown drilling method to construct an 18-inch diameter mild steel well casing to a depth of 430 feet, with assumed screen perforated from 340 to 400 (60 feet of louver screen and 30 feet of well cellar). At this time, the City does not have any as -builts, or well completion reports for Well 6. We understand that previously, Well 6 produced approximately 1,450 gallons per minutes (gpm). Over the last five years, production has decreased to 1,250 gpm (decrease of 200 gpm over the life of the well (63 years)). Possible sources of decreased well production include mineral scale and biofouling in the well screen and filter pack and worn pump assembly. Well sand production may have enlarged louver openings, increased pump wear, and sand accumulation at the bottom of well could be partly obstructing the well screen.

Our Well 6 rehabilitation approach will include data review of available data provided by the City to complete a preliminary well assessment . Based on our experience working in the Orange County Groundwater Basin, the Orange County Water District may have original r eports in their library of well records. With your permission, we will reach out to our contacts in the Hydrogeology Department and ask for any records for Well 6 or wells nearby that we constructed at approximately the same time.

Data collection and review will include previously completed well video surveys, well completion reports and as-builts for production wells constructed at the same time as Well 6 or near Well 6, and a discussion and review of the City’s well operator’s field notes and Rossum san d tests to determine general well behavior including sand production at start up. If possible, we would like to conduct this visit at Well 6 and hold an in-person kick off meeting with City staff.

Water sampling and a Rossum sand test should be considere d before the permanent pump is removed. Two water samples representing a casing sample and an aquifer sample would be submitted to Water Systems Engineering for chemical and microbiologic testing. Characterization of the microbiology will inform the chemic al treatment plan, including chemistry, concentrations, placement and agitation, and contact time.

Our subcontractor, Pacific Surveys, LLC, will perform a well assessment video following removal of the permanent pump. We will witness and direct a thorough video inspection survey to evaluate the condition of the casing, casing joints, slot openings, biofouling, and the presence of sediment, sand or filter pack resting on the louvers. Additionally, we will witness a caliper survey, and casing inspection log (CITM or EMT-24) survey to determine casing condition and metal loss due to corrosion. These surveys will inform chemical treatment, well redevelopment, and testing plans.

We will prepare an as-built schematic of the well based on the down hole surveys.

Based on the results of the records research, we may recommend conducting a cement bond log survey (CBL) to determine condition of the sanitary seal (if present) or a casing deviation survey to evaluate casing alignment. We will present results of these surveys to the City and discuss our findings and preliminary recommendation for well cleaning. Our careful review of the video survey and casing inspection surveys will evaluate the overall well condition and evaluate options for well rehabilitation, installation of patches or liner, or a new replacement well.

Following discussion of the findings and overall approach, plans and specifications will be prepared for chemical treatment, well redevelopment, and patch/liner installation (if necessary), and pumping tests. A detailed chemical treatment plan will outline acid treatment to remove mineral scale and open the louver slots , and chlorine treatment to remove biofouling. Th e treatment plan must consider the well design, age, local water quality, and casing material. As an City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

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alternative, some chemical treatment and redevelopment may be completed through a new liner and new filter pack. Removal of chemicals followed by thorough well redevelopment are essential to restore well capacity. Step drawdown and constant rate pumping tests will be completed to evaluate well yield and assist with selection of the permanent pump.

We will provide a well assessment technical memorandum that summarizes our findings and conclusions and outlines the approach to well rehabilitation. The report will include an assessment of the overall condition of the well and our recommendations for brushing, fill removal, chemical treatment, double-swab airlift , and if necessary, liner and filter pack design, and installation.

Additionally, this memorandum will include assessment for conversion of the oil lubricated system to water lubricated system. We will evaluate the existing facilities at the Fullerton well field to identify a water source and the plumbing modifications needed to supply water to the new water- lube pump. A reliable source of clean, disinfected water is preferred for these dedicated and automatic systems. Water lube flow will need to match the manufacturer requirements if a new pump system will be installed.

We estimate the draft well assessment report will be completed within one month. We will prepare a final draft of the well assessment report that addresses comments provided by the City.

4.1.2 Design Services

Based on the well assessment and discussions with City staff, ENGEO will prepare technical specifications for well rehabilitation, plans, drawings, bid schedule, and a project schedule, organized by task with deliverable milestones, bas ed on the well rehabilitation plan. Technical specifications will include chemical volumes and mixing, chemical placement and agitation, contact time, chemical removal and neutralization, NPDES discharge limits and monitoring requirements, and pump testing specifications. The recommended performance requirements (flow rate) for the well pump and motor and implementation plans for converting Well 6 from an oil-lubricated pump to a water-lubricated pump will also be included.

4.1.3 Construction Support Services

Task A: Well Rehabilitation Field Services (Inspection Services)

We will provide experienced staff to witness and direct the contractors work during Well 6 rehabilitation. The typical steps in well rehabilitation projects include:

• Preliminary chlorination and brushing to remove biofouling and scale followed by bailing of accumulated debris (1-2 days).
• Post-brushing and debris removal video survey to carefully inspect the casing condition and document any conditions previously obscured by biofouling or scale, (half day). • Acid treatment with bio -dispersant, agitation, replenishment, contact time, agitation, and removal via double swab airlifting method (up to three days). • Chlorine with enhancer treatment, agitation, replenishment, contact time, ag itation, and removal (up to three days).
• Double-swab airlift thorough redevelopment of the well screen interval (up to 1 to 2 days). • Pumping development (pump and surge), determine appropriate rates for step test and constant rate test (up to 3 days).
• Step drawdown and constant rate pumping tests (3 days).

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

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• Collect representative groundwater samples during final hours of constant rate test. • Conduct final well video survey (half day).
• Final disinfection prior to installation of permanent pump (half day).

Following well cleaning, additional specifications could be prepared to address installation of the permanent pump, final disinfection of well, and start up testing as required by the City . It should be noted that each step of well rehabilitation may require up to three days to complete; Well 6 has 60 feet of louvers reaching a total depth of 430 feet. Each step includes careful mixing of chemicals at the surface, and introduction and agitation of chemicals over short intervals of screen; overnight contact time; and thorough removal of each chemical. Removal of chemicals is best completed by double swab air lifting, which will produce large volumes of water at flow rates of 200 to 300 gpm. The well discharges will initially need to be chemically neutralized, a nd sediment will need to be removed by settlement prior to discharge. Consequently, the project plans will identify space for one small tank and up to three large (21,000 -gallon) storage tanks, water supply, and an approved storm drain for disposal. The te chnical specifications will include the procedures to clean chemically and physically the well, followed by redevelopment, and pumping tests.

We will provide part-time inspection services during mobilization and demobilization, and set up of chemical tanks, discharge storage tanks, and discharge pipelines. We will provide full time observation for chemical mixing and placement, agitation, followed by removal, neutralization, NPDES monitoring, and discharge to the storm drain. Our field geologist will direc t the redevelopment of the screen by double swab airlifting and then pumping development. Obtaining depth-specific information regarding sand production during airlifting and during the pumping tests will be key information during development. ENGEO will plan and direct the step drawdown and constant rate pumping tests to verify the yield and specific capacity of the well, and measure sand production. Water quality samples will be collected as directed by the City near the end of the constant rate test, placed in ice-chilled containers and coolers, and delivered to the City’s water quality testing laboratory under proper chain of-custody documentation within 24 hours of collection.

We have assumed the City will be responsible for the water quality testing costs of samples collected from the testing pumping. We will observe the contractor’s efforts to properly treat the water to meet National Pollutant Discharge Elimination System (NPDES) discharge requirements and their water quality monitoring. We will provide independent monitoring and documentation of field parameters (pH, chlorine residual, and turbidity) and daily discharge flow rate, volumes, and duration, in accordance with the City’s NPDES permit.

Task B: Summary Report

We will assemble the field data, laboratory results, surveys, and as-built schematic, and prepare a report summarizing the well rehabilitation activities, redevelopment, and pumping test results.

The pumping test results will be analyzed to determine the well yield, specific capacity, sand production, and recommendations for the long -term pumping rate and pump depth setting. The final report will include a photo log of the work progress and daily field reports as appendices .

One draft report will be submitted for the City’s review approximately four weeks following pump testing. The final report will incorporate the City’s comments. One final hard copy and one electronic copy will be submitted about 2 weeks after receiving comments from the City . Our Principal hydrogeologist (James Thurber) will sign the report as a certified hydrogeologist for all deliverables.

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 12 January 27, 2023

4.2 SAMPLE TECHNICAL SPECIFICATION FOR WELL REHABILITATION

Three samples of our technical specifications for well rehabilitation are included in Appendix B.

Please be advised that references within the documents to the city or agency , and their well name(s) are redacted per contract agreement.

4.3 ON-CALL HYDROGEOLOGICAL SERVICES

We propose the following scope of services based on the Request for Proposals (RFP #4385) and Addendums #1 and #2. We understand that the City currently has eight operating wells , including four operational wells located the “Main Plant” well field in the City of Anaheim and two offline wells which would eventually require rehabilitation and maintenance.

4.3.1 Water Well Assessment

We assume that the City would prefer well assessments in relation to wells currently offline, and for older wells that are showing diminished specific capacity and/or loss of pump efficiency. Our typical process for a production well assessment includes the following.

• Meet with City staff to obtain background information and discuss recent well performance/performance of well prior to turning off with well operating team. • Review available documents for the well, including well completion report, mud log, as-builts, water quality reports, geophysical surveys, video reports and videos, service records, electric bills.
• If more invasive data is needed, we can perform geophysical surveys and video surveys, and collect water samples for chemical and microbiologic testing. Characterization of the microbiology will inform the chemical treatment plan, including chemistry, concentrations, placement and agitation, and contact time for chemical placement during rehabilitation .

Chemical testing and analysis specific to these issues can be done through Water Systems Engineering (WSE), of Ottawa, Kansas. The video inspection will look for evidence of biofilm, mineral scale formation, blockage of screen openings, casing corrosion at joints , enlarged slots, and corrosion.
• Based on our review of data and results of invasive activities, we will provide you with a technical memorandum summarizing our findings and recommended next steps (well cleaning, rehabilitation, liner installation, or destruction) • Continued hydrogeological services for permanent pump installation, final disinfection, and start up testing at Well 6.

4.3.2 Water Rehabilitation Design

We will complete data gathering and review, well assessment reports, and project specifications and plans tailored for each well rehabilitation project. The technical approach to well assessment, field inspection, and reporting will be similar to Well 6.

4.3.3 New Well Design, Construction Observation and Documentation

Depending on the age and condition of a well, it may be more cost effective to construct a new replacement production well rather than completing a well rehabilitation or installing a liner.

ENGEO has the experience and capabilities to design new high-capacity municipal supply wells, complete construction oversight, and observe and direct well development and testing. Upon City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 13 January 27, 2023
request we can support the City to complete well siting studies, prelimin ary design, and final design and testing of new supply wells.

4.3.4 Well Destruction Design, Construction Inspection, and Documentation

ENGEO is capable of preparing plans and specifications, well destruction permits, bid phase consultation, and construction inspection for well destruction. Our typical process for well destruction includes the following.

• Review original well construction records and prepare draft well destruction permit application, and review destruction plans with the City and Orange County Health Care Agency Public Health Services Environmental Health Division – Water Quality. • Prepare technical specification, schematics, and bid form. • Provide edits to the City’s standard Contract Documents (front end). • Provide bid support including identify potential bidders, pre-bid meeting, respond to RFI’s, and provide addenda as necessary.
• Provide field oversight and document contractor’s activities during pump and shelter removal, video survey to verify presence of obstructions, pedestal removal and ex cavation, tremie installation, and pumping of sand-cement grout.
• Provide oversight during final backfilling of the excavation and surface paving. • Prepare summary report with photographic log documenting the work completed.

4.3.5 Well Siting Studies and Phase I Environmental Site Assessments

ENGEO is capable of preparing a well siting study for proposed new well locations. If the City determines it needs additional groundwater supplies outside of the “Main Plant” well field, a well siting study can be conducted prior to entering into easement agreements or parcel purchasing.

Based on our review of available data and documents, we will present you with a draft technical memorandum with a shortlist of locations that we believe are best suited for drilling, infrastructure installation, and maintenance of the new well. We will work with staff on conducting windshield surveys of the City’s preferred sites to observe features that may impact the City’s use for the well site, such as proximity to underground or overhead utilities, proximity to existing electrical service and storm drains, general site conditions, and proximity to sensitive receptors.

We will rank sites considering property ownership (private or public), access, size, and pipeline alignments for produced groundwater. Practical considerations include identifying a site capable of the following.

• Site and street access to the site.
• Windshield surveys will be conducted to view each site from the public right -of-way and we will discuss with the City to consider notifying DigAlert at the proposed sites to provide preliminary mapping of underground utilities.
• Site is large enough to contain a reverse circulation drill rig, 20,000 -gallon mud system, roll off bins, and fluid settling tanks to drill the n ew well. Ideally, all features can be contained within the property and there is limited on-street activity or storage.

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 14 January 27, 2023
• After drilling, site should be large enough to contain electrical facilities to operate the new well with space for a pump rig and settling tanks for future pump and well maintenance.

After discussions and review of comments provided by the City, we will issue a final technical memorandum. Additionally, ENGEO can provide Phase I Environmental Site Assessments for the selected site to ens ure from an environmental standpoint that groundwater pumped will be potable.

4.3.6 Grant Writing Assistance

ENGEO can provide technical assistance to the City’s grant writing team in pursuing additional water, water conservation, or groundwater conservation grants or loans.

4.3.7 Preparation of Drinking Water Source Assessment and Protection Reports (DWSAP)

ENGEO is capable of preparing a drinking water source assessment and protection (DWSAP) report, following the California Department of Drinking Water (DDW) g uidelines. The DWSAP report is the first step in developing a complete drinking water source protection program and will allow for the operation of new production wells.

5.0 FEE PROPOSAL

Our staff is prepared to support the City of Well 6 rehabilitation and in providing on call hydrogeological services. Our experience and local knowledge allows ENGEO to provide full support to the City throughout the project and ensure target dates are met.

5.1 UNDERSTANDINGS

• The fee schedule shall remain in effect during the first 12 months of the on-call services term. • Any proposed requests to change the adopted rates annually shall not exceed the relevant Consumer Price Index for the preceding 12 -month period and is also subject to cost negotiation.
• Direct costs, intended to be charged to the City, need to be stated. No mark-ups will be allowed for other direct costs.
• On-call services will be compensated based on the Proposer’s proposed hourly fees and estimated hours plus direct costs. Our hourly rate schedule is included with our Proposal. • The proposed total cost for the on-call services shall not exceed $200,000.00 during the entire term of the Agreement (three-year term with option to renew for two additional years).

5.2 ON-CALL HYDROGEOLOGICAL SERVICES

A detailed cost for individual well rehabilitation projects will be developed prior to starting work for each well. Our rates for on-call services are listed below.

ENGEO STAFF POSITION NAME RATE
Principal Hydrogeology and
Project Manager James Thurber, PG, CHg $280.00
Staff Geologist Emma Griffie, GIT
Jennifer Knipper, GIT $180.00

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 15 January 27, 2023

5.3 WELL 6 REHABILITATION

The matrix provides a breakdown of hours by task for each proposed staff member, and fees for professional service and direct costs . The hours presented for Well 6 rehabilitation make the following assumptions.

• Generally part-time inspection during mobilization and demobilization, and non-critical tasks. • Full-time inspection during chemical mixing, placement and removal, patch/liner installation (if necessary), well development, and well testing.

Our estimated fees for the well assessment and well rehabilitation fi eld services for Well 6 are presented in Section 6.2.1. A summary of our estimated fees is presented below.

TASK ACTIVITIES COST
Data Collection Review and Analysis Site Visit
Pump Removal
Initial Video
Preliminary Assessment Report
$40,560
Design Services Technical Specifications
Contract Documents
Bid Support
$8,680
Construction Support Services

Task A: Well Rehabilitation Field Services

Meetings
Mob/Demob
Brush and Bail
Chemical Treatment and Removal
Well Development
Well Testing
Final Video - Disinfection
$37,350

Task B: Summary Report Report $6,520

5.3.1 Well 6 Rehabilitation Fee Proposal
WELL

ASSESSMENT BID SERVICES
TOTAL
$93,110.00
Billing
LABOR HOURS Rate
Principal Hydrogeologist $280.00 8 2 4 8 4 2 2 2 2 4 8 46 Staff Geologist $180.00 46 16 1 6 4 12 16 24 20 24 12 12 16 10 20 239 Graphics/CAD Specialist $170.00 1 3 4 8
SUBTOTAL OF HOURS 54 19 4 10 8 8 12 18 26 22 24 12 14 20 10 32 293

LABOR COSTS
Principal Hydrogeologist $2,240.00 $560.00 $0.00 $1,120.00 $2,240.00 $1,120.00 $0.00 $560.00 $560.00 $560.00 $0.00 $0.00 $560.00 $1,120.00 $0.00 $2,240.00 $12,880.00 Associate Geologist $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Staff Geologist $8,280.00 $2,880.00 $180.00 $1,080.00 $0.00 $720.00 $2,160.00 $2,880.00 $4,320.00 $3,600.00 $4,320.00 $2,160.00 $2,160.00 $2,880.00 $1,800.00 $3,600.00 $43,020.00 Project Engineer $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Graphics/CAD Specialist $0.00 $170.00 $510.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $680.00 $1,360.00 SUBTOTAL OF COSTS $10,520.00 $3,610.00 $690.00 $2,200.00 $2,240.00 $1,840.00 $2,160.00 $3,440.00 $4,880.00 $4,160.00 $4,320.00 $2,160.00 $2,720.00 $4,000.00 $1,800.00 $6,520.00 $57,260.00

DIRECT COSTS UNIT RATE COST
Data Logger Rental for Step and Constant Rate Testing 1 $200.00 $200.00 Mileage 1000 $0.65 $650.00
Video Inspections (Pacific Surveys, LLC) 3 $1,900.00 $5,700.00 Geophysical Surveys (Caliper, CITM) (Pacific Surveys, LLC) 1 $13,000.00 $13,000.00 Geophysical Surveys (Cement Bond Long (CBL), Gyroscopic) (Pacific Surveys, LLC) 0 $7,700.00 $0.00 Pump Removal including Disposal (Best Drilling and Pump, Inc.) 1 $15,000.00 $15,000.00 Repro, Report 0 $100.00 $0.00
Misc. field supplies 1 $200.00 $200.00
General Water Quality Testing (Weck Laboratories, Inc.) 1 $1,100.00 $1,100.00 Microbiology Water Testing (WSE, Complete Well Profile, shipping; $1550 + 20%) 0 $2,200.00 $0.00 SUBTOTAL OF COSTS $35,850.00
TOTAL DIRECT COSTS $35,850.00
GRAND TOTAL $93,110.00
Well Rehab
Summary
Report
Pumping
DevelopmentTechnical Spec Mobilization/
Demob
Constant Rate
Test
Final Video (Video
3) and Disinfection
Brushing with
Biocide, Bailing,
Video 2
Acid Treatment
and Removal
Chlorine
Treatment and
Removal
Mechanical
Redevelop-
ment
Step Drawdown
Test

WELL REHABILITATION - FIELD HYDROGEOLOGY SERVICES

TASK BREAKDOWN

TECHNICAL SPECIFICATIONS
Site Visit/Video 1/
Prelim Assessment
Report
Contract
Document
Graphics
Meetings and
Project Mgmt.

Pre-con
Meeting
Bid Support, Pre-
Bid Meeting,
RFI, Addenda
Replace with Fee Proposal dated March 30, 2023

5.3.1 Well 6 Rehabilitation Fee Proposal
January 27, 2023 Rev. March 30, 2023
WELL

ASSESSMENT BID SERVICES
TOTAL
$98,210.00
Billing
LABOR HOURS Rate
Principal Hydrogeologist $280.00 8 2 4 8 4 2 2 2 2 4 8 46 Staff Geologist $180.00 46 16 1 6 4 12 16 24 20 24 12 12 16 10 20 239 Graphics/CAD Specialist $170.00 1 3 48
SUBTOTAL OF HOURS 54 19 4 10 8 8 12 18 26 22 24 12 14 20 10 32 293

WELL REHABILITATION - FIELD HYDROGEOLOGY SERVICES

TASK BREAKDOWN

TECHNICAL SPECIFICATIONS
Site Visit/Video 1/
Prelim Assessment
Report
Contract
Document
Graphics
Meetings and
Project Mgmt.

Pre-con
Meeting
Bid Support, Pre
-
Bid Meeting,
RFI, Addenda
Well Rehab
Summary
Report
Pumping
DevelopmentTechnical Spec Mobilization/
Demob
Constant Rate
Test
Final Video (Video
3) and Disinfection
Brushing with
Biocide, Bailing,
Video 2
Acid Treatment
and Removal
Chlorine
Treatment and
Removal
Mechanical
Redevelop-
ment
Step Drawdown
Test
City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 17 January 27, 2023

6.0 REQUIRED FORMS
19 ATTACHMENT A: NON-COLLUSION AFFIDAVIT
Note: To be executed by Proposer and submitted with proposal.

State of
(the State of the place of business)
County of
(the County of the place of business)
, being first duly sworn, deposes and
(name of the person signing this form)
says that he/she is of
(title of the person signing this form)
, the party making the foregoing bid
(name of bidding company)
that such bid is not made in the interest of or on the behalf of any undisclosed person, partnership, company, association, organization or corporation; that such bid is genuine and not collusive or sham; that said bidder has not directly or indirectly induced or solicited any other bidder to put in a false or sham bid and has not directly or indirectly colluded, conspired, connived, or agreed with any bidder or anyone else to put in a sham bid, or that anyone shall refrain from bidding; that said bidder has not in any manner directly or indirectly sought by agreement, communication, or conference with anyone to fix the bid price of said bidder or of any other bidder or to fix any overhead profit, or cost element of such bid price, or of that of any other bidder, or to secure any advantage against the public body awarding the contract of anyone interested in the proposed contract; that all statements contained in such bid are true, and further, that said bidder has not directly or indirectly submitted his bid price or any breakdown thereof, or the contents thereof, or divulged information or data relative thereto, or paid and will not pay any fee in connection therewith, to any corporation, partnership, company, association, organization, bid depository, or to any member or agent thereof, or to any other individual except to any person or persons as have a partnership or other financial interest with said bidder in the general business By: ______________________________
(signature)
Printed Name: ______________________________
(name of the person signing this form)
Title: ______________________________
(title of the person signing this form)
California
Orange County
Jam
es Thurber
Principal
E
NGEO
James Thurber
Principal

20 ATTACHMENT B: SPECIAL PROVISIONS
All items below apply to this bid proposal:

Hold Harmless and Indem nification: The successful bidder hereby agrees to indemnify, defend, and hold harmless City (including its officials, officers, agents, employees, and representatives) from and against any and all claims of any kind or nature presented against City arising out of vendor's (including vendor's employees, representatives, and subcontractor) performance under this agreement, excepting only such claims, costs or liability which may arise out of the sole negligence or willful misconduct of City.

Insurance Provisi ons: Unless otherwise stated in the RFP specifications, the following insurance requirements apply:

1. Compr ehensive General Liability Insurance: (include products liability) $1,000,000 per occurrence.

2. Auto Liability Insurance: $1,000,000 per occurrence, combined single limit (CSL).

3. Workers' Compensation Insurance: as required by State statutes.

4. Employer’s Liability Insurance: $1,000,000 per accident; $1,000,000 policy limit for di
sease.

5. Professional Liability Insurance: $1,000,000

6. All policies of insuranc e must provide for a minimum of thirty (30) days written notice of any change or cancellation of the policy.

7. Insurance policies to be in a form ad written through companies acceptable to City; and
must include those endorsements which are necessary to extend coverage which is appropriate to the nature of the agreement.

Affirmative Action: The successful bidder hereby agrees to comply with Title VII of the Civil Right Act of 1964, as amended, the Civil Rights Act of 1992, and all federal, state, and municipal laws and regulations pertaining thereto, in support of Affirmative Action:

Certified to above - FIRM:

SIGNATURE:

PRINT NAME:

TITLE:

ENGEO
James Thurber
Principal

21 ATTACHMENT C: EXCEPTIONS
If your company is taking exception to any of the specifications, terms or conditions (including insurance, indemnification and/or proposed contract language) stated in this Request for Proposal, please indicate below and describe details: (check any that apply).

No exceptions taken
Exception taken to the scope of work or specifications
Exception taken to indemnification and insurance requirements Exception to proposed contract language
Other
Please explain any of the checked items:

PROPOSING FIRM: DATE:

BUSINESS ADDRESS :

SIGNATURE OF REPRESENTATIVE:

BY: TITLE:

INSTRUCTION REGARDING SIGNATURE: If bidder is an individual, state "Sole Owner" after signature. If bidder is a partnership, signature must be by a general partner, so stated after "Title".

Names of all other partners and their business addresses must be shown below. If bidder is a corporation, signature must be by an authorized officer, so stated after "Title", and the names of the President and Secretary and their business addresses must be shown below:

X
ENGEO
James Thurber Principal
320 Goddard Way, Suite 100, Irvine, CA 92618
1/25/23
Uri Eliahu, President
Brian Flaherty, Secretary
2010 Crow Canyon Pl, Ste 250
San Ramon, CA 94583
2010 Crow Canyon Pl, Ste 250
San Ramon, CA 94583

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 21 January 27, 2023
APPENDIX A: RESUMES

JAMES THURBER, CEG, CHG
Principal

James Thurber brings more than 35 years of expertise encompassing hydrogeologic assessment of groundwater
basins; aquifer characteristics determination; water well site selection; water well and injection well design; management of well construction; and assessment and development of well rehabilitation programs.

James is the project hydrogeologist for Orange County Water District’s Mid-Basin Injection Project to oversee the design, construction, and testing of two deep nested monitoring wells and four high -capacity injection wells. H e was the principal hydrogeologist for the design and construction management of Mesa Water District Well Nos. 1B, 8B, 9, 9B and 11.

Recently, James provided planning and oversight of well rehabilitation for Mesa’s well Nos. 3, 5 and 7. James was principal hydrogeologist for West Basin Municipal Water District’s Brewer Desalter Well and West Coast Basin Barrier nested monitoring well project responsible for preliminary and final design, construction monitoring, and testing. He was the project hydrogeologist for the design and testing of two high- capacity municipal supply wells for the Los Angeles
Department of Water and Power and Water Replenishment
district of Southern California. In 1999 James worked jointly with OCWD staff to develop preliminary design of the next generation, large diameter, aquifer -specific, cluster injection wells that would accept down -hole flow control valves and dedicated backfl ush pumps. In 2003, he was the project hydrogeologist for the drilling, final design, and construction observation of three more triple -cluster injection wells. He planned and directed both extraction and injection tests to measure aquifer parameters, dete rmine optimum injection rates, measure local aquifer-response, and test effectiveness of well seals. New well design modifications resulted in high- capacity, efficient injection wells capable of regular back flushing using dedicated pumps.

James performe d the background research, hydrogeologic analyses and planning for the San Juan Capistrano
Groundwater Desalter. James was the project manager and principal hydrogeologist for the design and installation of two nested monitoring wells on the margins of New port Mesa to evaluate coastal and fault barrier issues. Two nested
monitoring wells were installed along the Russian River near Windsor to evaluate deep groundwater resource potential.

Jim was the lead hydrogeologist for construction
management of OCWD’s s ea water intrusion deep nested
monitoring wells located in the Sunset Gap (Seal Beach), Talbert Gap, and Newport Mesa. He was the project

EDUCATION
MS, Geology, Colorado State
University, 1982
BS, Geology, California State
University, Northridge, 1978
BA, Geography, California State
University, Northridge, 1976

EXPERIENCE
Years with ENGEO: 38

REGISTRATIONS &

CERTIFICATIONS
Certified Hydrogeologist, CA 162
Certified Engineering Geologist, CA
1458
Professional Geologist, CA 4197

SPECIALIZATIONS
• Monitoring Wells
• Large Diameter Injection/Supply
Well Design
• Groundwater Resource Evaluation

JAMES THURBER, CEG, CHG

hydrogeologist for the San Pasqual Groundwater Basin study for the City of San Diego, requiring construction of observation wells, aquifer testing, data collection and analysis to determine aquifer parameters in support of the modeling effort.

He also performed geologic logging, well design, construction observation, and directed well development and pumping tests of Wa ter Wells No. 19 through 25 for the City of Orange, California. As project manager, James provided hydrogeologic analysis of formation and geophysical logs and design of the Ball and Boisseranc wells in the City of Buena Park; and performed well design and aquifer testing of four new production wells for the Irvine Desalter Project. James was project manager for drilling 18 test holes and design, construction and pump testing of 9 extraction wells and 8 monitoring wells for the Northeast Disposal Area, Geor ge Air Force Base. James planned and performed aquifer testing and data analysis to determine storage and annual yield for the fractured rock aquifer at Maderas Golf Course in Poway, and the Sycamore Ranch Golf Course in Fallbrook, California. He has conducted aquifer characterizations at major landfills in Southern California including Puente Hills Landfill, Los Alamitos AFRC Landfill, Palomar Airport Landfill and Miramar Landfill.

James has experience evaluating well performance and microbiologic testing to prepare detailed plans for well rehabilitation by chemical treatment and physical cleaning. Reduced well performance and sanding can be restored with thorough acid treatment, disinfection, and redevelopment. Post-treatment pumping tests are performed to verify the rehabilitation goals are met. His particularly sought -after skills include the design of large -diameter, high -capacity municipal supply wells; injection wells and monitoring wells in nested and cluster configurations; and interpretation of st ratigraphic and geophysical logs for final selection of screened intervals and gravel pack during well construction to optimize sand -free groundwater production and aquifer-specific monitoring. In addition, James is also experienced in monitoring the construction of wells to confirm accurate placement of the well screen and gravel pack. He is also experienced in the analysis of pumping test results to define production levels and develop recommendations for operation and maintenance, as well as water qualit y monitoring. James has completed the siting and design of nested and clustered monitoring wells for long term monitoring of aquifer - specific water levels and water quality. James has also prepared Groundwater Drinking Water Source Assessment Program (DWSAP) reports.

SELECT PROJECT EXPERIENCE

Well Rehabilitation
• Rehabilitation of Well Nos. 2, 4, 5 and 6, City of Beverly Hills • Reconstruction of Well No. 19, Corona
• Rehabilitation of Wells No. 3B, 5, and 7, Mesa Water District, Costa Mesa • Rehabilitation of Well. No. 6, City of San Clemente

Municipal Water Wells
• VanderWerff Well, Orange
• Mesa Water District Wells No. 1B, No. 8, No. 9, No. 9B, and No. 11, Costa Mesa • Well No. 8, City of San Clemente, CA
• San Juan Capistrano Desalter Wells, San Juan Capistrano • Wells No. 19, No. 20, No. 21, No. 22, No. 23, No. 24, and No. 25, Orange • Vandenberg Well, City of Tustin
Injection/Recharge Wells
• Injection Wells MBI-2 through MBI-5, Mid-Basin Injection Project, Orange County Water District, Santa Ana, CA

EMMA L. GRIFFIE, GIT
Staff Geologist

Emma has five years of experience with the planning and field hydrogeologic services for new well construction and well rehabilitation projects. She has performed formation sampling and logging, well construction oversight, and directing thorough development of new supply wells and injection
wells. Emma also provided field services during the chemical treatment and rehabilitation of municipal supply wells, double swab airlifting redevelopment, including pumping tests, final video survey inspection, and disinfection.

Her expertise includes hydrogeologic assessment of aquifers; monitoring well and injection well design; management of well construction; and planning and oversight of chemical
treatment and well rehabilitation . She has completed three well rehabilitation projects and performed over 10,000 feet of formation sampling in her career. Emma has supported well design, and provided oversight and documentation of well construction, development, design, and testing of the
monitoring wells and the injection wells.

SELECT PROJECT EXPERIENCE-

Well Rehabilitation—Costa Mesa, CA
Staff Geologist. Emma provided oversight of chemical and physical well cleaning followed by mechanical and pumping redevelopment of Mesa Water District’s wells No. 1 and 3B.

Well rehabilitation was required as part of a larger project of automating well production. The wells had decreased specific capacity with abundant biofilm growth in the screens. She provided oversight of brushing, removal of fill, chemi cal injection, chemical removal and neutralization, and
mechanical redevelopment. She planned and directed
pumping development, pumping tests (Step and Constant
Rate Tests), spinner survey and depth-specific and well head water quality sampling.

City of B everly Hills Well No. 2, 4, 6 Rehabilitation — Beverly Hills, CA
Staff Geologist. Provided oversight for the rehabilitation, redevelopment, and testing of Wells No. 2, 4, and 6 for the Beverly Hills Department of Public Works, as part of the larger well main tenance and rehabilitation project for the City of Beverly Hills Water Treatment Plant. Th e well rehabilitation project was undertaken due to decreased well production, reduced specific capacity, sanding during pumping, presence of iron sulfide bacteria, and the occurrence of filter pack in the Rossum sand tester during routine pumping. Observed and directed chemical treatment followed by swabbing and
airlifting for redevelopment. Assisted in preparing the final Summary of Operations Report.

EDUCATION
BS Geological Sciences California
State University Fullerton 2017

EXPERIENCE
Years with ENGEO: 5

SPECIALIZATIONS
• Water Wells/Hydrogeology
• Well Rehabilitation
• Well Construction and
Development
• Formation Sampling

EMMA GRIFFIE

Mid-Basin Injection Project Nested Monitoring Wells—Santa Ana, CA Staff Geologist. Ms. Griffie provided field service for the Mid Basin Injection Well Project for the design, construction, and testing of two deep nested monitoring wells that will be used to monitor water levels and water quality of the GWRS water injected into the principal aquifer. She provided formation sampling, geologic logging, oversight of aquifer zone isolation sampling, grain size analysis, and geophysical log analysis to support th e design, construction observation, development, and testing of the wells. Each monitoring location was completed with 4 nested wells targeting isolated aquifer intervals from depth 600 to 1,000 feet.

Mid-Basin Injection Project Injection Wells—Santa Ana, CA Staff Geologist. Emma provided field oversight and geology for Orange County Water District’s Mid Basin Injection Well Project for the design, construction, and testing of four high -capacity injection wells targeting the principal municipal supply aqui fers of central Orange County Groundwater Basin. She provided formation sampling and geologic logging of the pilot holes to a depth of 1,100 feet, grain size analysis, geophysical log analysis, and the selection of filter pack and well screen slot sizes. She oversaw well construction, including the installation of well casing, screen, and tubing, filter pack (silica sand or glass beads), and cement seal. She closely monitored and directed mechanical development, chemical development , and pumping development. She observed and directed pumping and water quality sampling. During test pumping, she deployed pressure transducers to monitor the response of nearby monitoring wells and new injection wells. She oversaw spinner surveys, dynamic and final well completion videos, gyroscopic surveys, and final well disinfection.

Sunset Gap Clustered Monitoring Wells—Seal Beach and Huntington Beach, CA Staff Geologist. Ms. Griffie provided oversight for two separate phases of Orange County Water District’s Sunset Gap Monitoring Well Project for the design, construction, and sampling of seven monitoring well clusters (22 wells) that will be used as permanent monitoring points for water level and water quality of specific aquifers to monitor seawater intrusion. Data obtained from the Sunset Gap monitoring well network will be used to expand the OCWD Alamitos -Sunset groundwater model for use as a predictive tool for simulating potential intrusion remedies. Drilling in the fine- grained marine sediments provides unique challenges in low consolidation sediments prone to caving, swelling clays, and seawater chemistry impacting traditional drilling muds. She provided formation sampling, geologic logging, and geophysical log analyses to s upport the design; well construction observation, chemical and mechanical development, water quality sampling, well construction close-out video, and final well disinfection. Construction support included monitoring sound wall installation, removal, gravel placement on 500-foot-long work area, drill mud monitoring to avoid collapsing borehole conditions, construction of well pads and vaults, coordinating with various sub-contractors and Naval Weapons Station Seal Beach . The second project phase is performed in city streets in commercial, industrial, and residential areas of Seal Beach and Huntington Beach.

JENNIFER KNIPPER, GIT
Staff Geologist

Jennifer is experienced in collecting formation samples, preparing geologic logs of borings, and reviewing geophysical logs to identify and chara cterize aquifers and aquitards. She has provided oversight and direction during well rehabilitation including chemical treatment, redevelopment, and pumping tests. She provides oversight of well discharges to ensure compliance with NPDES discharge requirements. Her
expertise encompasses hydrogeologic assessment of
groundwater basins ; aquife r characteristics determination; monitoring well and injection well design; and management of well construction. She has completed three well rehabilitation projects and provided over 10,000 feet of formation sampling in her career. Jennifer’s experience covers well construction, development, design, and testing of supply wells, monitoring wells and injection wells.

SELECT PROJECT EXPERIENCE

VanderWerff Well—Orange, CA
Staff Geologist. Jennifer provided oversight for East Orange County Water District’s VanderWerff Well for the design, construction, and testing of a new municipal supply well. She conducted formation sampling and logging and reviewed
geophysical logs to select zones for aquifer zone isolation testing. She reviewed water quality data, logs, and formation grain size to prepare final well completion recommendations for total depth, screen intervals and slot size, and filter pack gradation. She documented casing installation, filter pack placement, and se aling. She planned and directed well
development, pumping tests, spinner survey, and depth - specific water quality sampling. She analyzed field and lab data to determine aquifer parameters and present
recommendations for setting the permanent pump, pumping rates, and well maintenance. The well was constructed to a depth of 600 feet with a yield of 1,700 gallons per minute.

Well Rehabilitation—Beverly Hills, CA
Staff Geologist. Jennifer provided oversight of chemical and physical cleaning followed by mechanical and pumping
development of Beverly Hills’ Well Nos. 4, 5 and 6. She provided oversight of brushing ; chemical injection , removal and neutralization ; and mechanical redevelopment. Sh e directed well development, pumping te sts, spinner survey , and depth-specific and well head water quality sampling. Well rehabilitation was required due to decreased well production, reduced specific capacity, and sanding during pumping.

EDUCATION
MS Environmental and Urban
Geosciences/Environmental Geology
University of Missouri, 2021
BS Geology and Biology, University
of Missouri, 2012

EXPERIENCE
Years with ENGEO: 5
Years with Other Firms: 7

SPECIALIZATIONS
• Well Mudlogging, Construction,
and Design
• Well Rehabilitation
• Experience with preparation of
CEQA/NEPA document sections

JENNIFER KNIPPER, GIT

Well Rehabilitation—Torrance, CA
Staff Geologist. Jennifer provided oversight of chemical and physical cleaning followed by mechanical and pumping redevelopment of West Basin’s Brewer Desalter Well. She provided oversight of brushing, removal of fill, chemical injection, chemical removal and neutralization, and mechanical redevelopment. She planned and directed well development, pumping tests (Step and Constant Rate Tests), spinner survey and depth -specific and well head water quality sampling. Well rehabilitation was r equired after 15 years of continuous operation and reduction of specific capacity caused by biomass formation.

Well Liner Installation—Corona, CA
Staff Geologist. Jennifer was responsible for field oversight during liner installation, chemical treatment, well development, and testing. A full-depth stainless steel liner was installed inside the original well along with a select filter pack, a deeper sanitary seal, gravel feed tube, sounding tube, and piezometer tube. After liner installation, che mical treatment was completed in two phases; hydrochloric acid treatment to remove abundant mineral scale, and chlorine treatment to address biofouling. Pumping tests confirmed acceptable well capacity and sand -free municipal supply was restored.

Mid-Basin Injection Project Nested Monitoring Wells—Santa Ana, CA Staff Geologist. Jennifer provided field geology for the Mid Basin Injection Well Project for the design, construction, and testing of two deep nested monitoring wells that will be used to monitor water levels and water quality of the GWRS water injected into the principal aquifer. She provided formation sampling, geologic logging, oversight of aquifer zone isolation sampling, grain size analysis, and geophysical log analysis to support the design, c onstruction observation, development, and testing of the wells.

Mid-Basin Injection Project Injection Wells—Santa Ana, CA Staff Geologist. Jennifer provided field oversight for Orange County Water District’s Mid Basin Injection Well Project for the design, construction, and testing of four high-capacity injection wells targeting the principal municipal supply aquifers of central Orange County Groundwater Basin.

She provided formation sampling, geologic logging, grain size analysis, geophysical log analysis, and the selection of filter pack and well screen slot sizes. She oversaw well construction, including the installation of well casing, screen, and tubing, filter pack (silica sand or glass beads), and cement seal. She closely monitored and directed mechanical development, chemical development, and pumping development . She observed and directed pumping tests and water quality sampling. She oversaw spinner surveys, dynamic and final well completion video s, gyroscopic surveys, and final well disinfection.

Sunset Gap Clustered Monitoring Wells—Seal Beach, CA
Staff Geologist. Jennifer provided oversight for Orange County Water District’s Sunset Gap Monitoring Well Project for the design, construction, and testing of five monitoring well clusters (22 wells) that will be used as permanent monitoring points for water level and water quality of specific aquifers to monitor salt -water intrusion. Data obtained from the Sunset Gap monitoring well network will be used to expand the OCWD Alamitos-Sunset groundwater model to evaluate migration paths and to be used as a predictive tool for simulating potential intrusion remedies.

She provided formation sampling, geologic logging (including Munsell colors), and geophysical log analyses to support the design; well construction observation, chemical and mechanical development, sampling, well construction close-out video, and final well disinfection. Construction support included monitoring sound wall installation, removal, drill mud monitoring due to collapsing borehole drilling conditions, construction of well pads and vaults, and coordination with drilling contractor, sub-contractors and Naval Weapons Station Seal Beach.

City of Fullerton Proposal for Hydrogeologic Services Well 6 Rehabilitation 21859.000.001 and On-Call Hydrogeological Services

Page | 28 January 27, 2023
APPENDIX B: SAMPLE TECHNICAL SPECIFICATIONS FOR WELL

REHABILITATION

REHABILITATION OF WELLS

TECHNICAL SPECIFICATIONS
SECTION 01110

SUMMARY OF WORK
PART 1 GENERAL

1.01 SUMMARY
A. Section includes: Identification and summary description of the Project, the Work, location, Owner- furnished products, activities by others, coordination, and early occupancy by Owner.

B. Related section:

1. The Contract Documents are complementary; what is called for by one is as binding as if called for by all.

2. It is the Contractor’s responsibility for scheduling and coordinating the Work of subcontractors, suppliers, and other individuals or entities performing or furnishing any of Contractor’s Work.

3. The following Sections are related to the Work described in this Section. This list of Related Sections is provided for convenience only and is not intended to excuse or otherwise diminish the duty of the Contractor to see that the completed Work complies accurately with the Contract Documents.
a. Section 11313I - Submersible Vertical Turbine Pumps.

1.02 THE WORK
A. The Work consists of rehabilitation of three municipal supply wells, mechanical and electrical installation of an owner supplied submersible pump and column pipe, and reconnection of the well pump to existing piping. All the work specified in the bid proposal and these technical provisions shall be done in accordance with the provisions of the latest edition of the District's Standards, California Well Standards and the Standard Specifications for Public Works Construction ("Green Book"), unless superseded by these specifications, and all amendments thereto, adopted by the Joint Cooperative Committee of Southern California Chapter, American Public Works Association and Southern California District, Associated General Contractors of California; hereinafter referred to as the "Standard Specifications".

B. The wells will be rehabilitated by chemical treatment and redevelopment. The wells are located in the City of Beverly Hills near Santa Monica Blvd and Palm Dr., Santa Monica Blvd, and Carmelita Ave., and Burton Way and Foothill Road. Treatment, redevelopment, and pump installation will generally include, but not be limited to, the following:

1. Move equipment on (and off) the site.

2. Remove permanent pump.

3. Air-lifting or suction-bailing of fill from the bottom of the well.

4. Conduct color video surveys as necessary to evaluate progress of chemical treatment.

5. Provide two 21,000 gallon storage tanks.

6. Provide phosphoric acid and acid enhancer, and introduce into the well by double swab to insure acid flows through the well perforations and into the filter pack and formation. Agitate the well to distribute the chemical. Collect water samples from the well to check pH. Replenish acid as necessary to maintain pH of 4.0 or lower for the first 6 hours of treatment. Provide a minimum of 12- hours and a maximum of 36-hours of contact time.

7. Remove the acid by air lifting through a perforated double swab, contain discharge water, test and neutralize as necessary prior to discharge to the local drain.

8. Provide 5,000-gallon vacuum trucks to haul fluids not meeting discharge limits from the site for proper disposal.

9. Provide sodium hypochlorite and chlorine enhancer and introduce into the well by double swab to force chlorine through the well perforations. Agitate the well to disperse the chemical. Provide a minimum of 12-hours and a maximum of 24-hours of contact time.

10. Remove the chlorine by air lifting through a perforated double swab, contain discharge water, test and neutralize as necessary prior to discharge to the local drain.

11. Conduct mechanical redevelopment by swabbing and air lifting.

12. Conduct pumping development by the pump and surge method.

13. Conduct step drawdown and constant rate pumping tests.

14. Conduct spinner survey and depth-specific water sampling.

15. Conduct color video survey and well disinfection.

16. Installation of the owner provided permanent pump, motor, column pipe, and well head connections; provide startup test.

17. Conduct final well disinfection with the permanent pump in place.

18. Complete site cleanup and repair of damaged facilities as necessary.

C. Submission of a bid by the bidder shall constitute acknowledgment that, if awarded the contract, he has relied and is relying on his own examination of (a) the site of the work, (b) access to the site, (c) the conditions under which the work is to be performed, and (d) all other data and matters requisite to the fulfillment of the Work and on his knowledge of existing facilities on and in the vicinity of the site of the work to be constructed under the contract.

D. Except as specifically noted otherwise, provide and pay for:

1. Insurance and bonds.

2. Labor, materials, and equipment.

3. Tools, equipment, and machinery required for construction.

4. Utilities required for construction.

5. Temporary facilities including sheeting and shoring.

6. Traffic control and dust control measures.

7. Other facilities and services necessary for proper execution and completion of the Work.

E. Secure and pay for all permits including OSHA excavation permits, Department of Transportation permits, government fees, and licenses.

F. Comply with codes, ordinances, regulations, orders, and other legal requirements of public authorities having bearing on the performance of the Work.

1.03 LOCATION OF PROJECT
A. The Work is located near the intersection of Santa Monica Blvd. and Canon Dr.

1.04 ACTIVITIES BY OTHERS
A. Owner, utilities, and others may perform activities within Project area while the Work is in progress.

1. Schedule the Work with Owner, utilities, and others to minimize mutual interference.

B. Cooperate with others to minimize interference and delays.

1. When cooperation fails, submit recommendations and perform Work in coordination with work of others.

1.05 COORDINATION OF WORK
A. Maintain overall coordination of the Work.

B. Obtain construction schedules from each subcontractor, and require each subcontractor to maintain schedules and coordinate modifications.

1.06 EARLY OCCUPANCY OF PORTIONS OF WORK
A. Certificates of Substantial Completion will be executed for each designated portion of Work prior to Owner occupancy.

1. Such certificate of Substantial Completion will describe the portion of the Work to be occupied by Owner, items that may be incomplete or defective, date of occupancy by Owner, and other information required by Owner and Contractor.

B. After Owner occupancy, allow access for Owner's personnel, access for others authorized by Owner, and Owner operation of equipment and systems.

PART 2 PRODUCTS
Not Used.

PART 3 EXECUTION
Not Used.

END OF SECTION
TABLE 1
WELL No. 2 CASING SCHEDULE
Depth Interval1
Item (feet) Size Type
Conductor Casing 0-60 24-inch Mild Steel
Pilot Hole 60-836 17.5-inch - - -
Final Ream 60-760 22-inch - - -
Well Casing2 0-399 12.25-inch x 5/16-inch 304L Stainless Steel Blank 399-426 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 426-466 12.25-inch x 1/4-inch 304L Stainless Steel Blank 466-518 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 518-566 12.25-inch x 1/4-inch 304L Stainless Steel Blank 566-608 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 608-721 12.25-inch x 1/4-inch 304L Stainless Steel Blank 721-730 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 730-740 12.25-inch x 1/4-inch 304L Stainless Steel End Cap Cement Seal 0-362 Sand-Cement Grout
Filter Pack 362-760 SRI 6 x 8
Sounding Tube 0-393 2-inch 304L Stainless Steel
Gravel Feed Tube 0-378 3-inch 304L Stainless Steel
Air Vent Tube 0-11 2-inch 304L Stainless Steel
Notes: 1. Depth below ground surface. Top of well casing/flange in vault is 9 feet below ground surface.

2. Screen interval depths based on As-built drawing and video survey 12-06-17.

TABLE 2
WELL No. 4 CASING SCHEDULE
Depth Interval1
Item (feet) Size Type
Conductor Casing 0-60 24-inch Mild Steel
Pilot Hole 60-685 17.5-inch - - -
Final Ream 60-665 22-inch - - -
Well Casing2 0-391 12.25-inch x 5/16-inch 304L Stainless Steel Blank 391-427 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 427-465 12.25-inch x 1/4-inch 304L Stainless Steel Blank 465-495 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 495-521 12.25-inch x 1/4-inch 304L Stainless Steel Blank 521-550 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 550-566 12.25-inch x 1/4-inch 304L Stainless Steel Blank 566-588 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 588-613 12.25-inch x 1/4-inch 304L Stainless Steel Blank 613-630 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 630-640 12.25-inch x 1/4-inch 304L Stainless Steel End Cap Cement Seal 0-343 Sand-Cement Grout
Filter Pack 343-665 SRI 6 x 8
Sounding Tube 0-387 2-inch 304L Stainless Steel
Gravel Feed Tube 0-375 3-inch 304L Stainless Steel
Air Vent Tube 0-11 2-inch 304L Stainless Steel
Notes: 1. Depth below ground surface. Top of well casing/flange in vault is 9 feet below ground surface.

2. Screen interval depths based on As-built drawing.

TABLE 3
WELL No. 6 CASING SCHEDULE
Depth Interval1
Item (feet) Size Type
Conductor Casing 0-53 24 x 5/16-inch Mild Steel
Pilot Hole 60-740 17.5-inch - - -
Final Ream 60-680 22-inch - - -
Well Casing2 0-385 12.25-inch x 5/16-inch 304L Stainless Steel Blank 385-440 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 440-485 12.25-inch x 1/4-inch 304L Stainless Steel Blank 485-650 12.25-inch x 1/4-inch 304L Stainless Steel Ful-Flo Louvers 650-670 12.25-inch x 1/4-inch 304L Stainless Steel End Cap Cement Seal 0-345 Sand-Cement Grout
Filter Pack 345-670 SRI 6 x 12
Sounding Tube 0-? 2-inch 304L Stainless Steel
Gravel Feed Tube 0-? 3-inch 304L Stainless Steel
Air Vent Tube 0-? 2-inch 304L Stainless Steel
Notes: 1. Depth below ground surface. Top of well casing/flange in vault is 9 feet below ground surface.

2. Screen interval depths based on As-built drawing.

As-Built Well Completion Schematic
Beverly Hills Well No. 2
60 362
730
740
760
9 22-inch diameter borehole
22-inch borehole
Sand-Cement Grout
36-inch borehole
Sand-Cement Grout
399
22-inch
Filter Pack,
Silica Resources, Inc.
6 x 8

SOUNDING TUBE
OPENING (393-395 feet)
2-inch 304L stainless steel sounding
tube with threaded cap
2-inch stainless steel air vent
with threaded cap
3-inch stainless steel gravel feed
tube with threaded cap
3-inch 304L stainless steel
gravel feed tube
Well Contractor: Bakersfield Well and Pump Co.

Date Completed: October 1999
378
426
466
518
566

12.25-inch x 1/4 inch 304L stainless steel,
Ful-Flo Louver screen, 0.075-inch slot

12.25-inch x 1/4 inch 304L stainless steel
blank casing12.25-inch x 1/4 inch 304L stainless steel
blank casing

12.25-inch x 5/16 inch 304L
stainless steel blank casing

12.25-inch x 1/4 inch 304L stainless steel
casing with end cap
Depth Below Ground
Surface (feet)
top of well in vault 24-inch x 3/8-inch wall low
carbon steel conductor

12.25-inch x 1/4 inch 304L stainless steel,
Ful-Flo Louver screen, 0.075-inch slot

12.25-inch x 1/4 inch 304L stainless steel,
Ful-Flo Louver screen, 0.075-inch slot
Ground Surface
721
608

12.25-inch x 1/4 inch 304L stainless steel
blank casing

12.25-inch x 1/4 inch 304L stainless steel,
Ful-Flo Louver screen, 0.075-inch slot

As-Built Well Completion Schematic
Beverly Hills Well No. 4
60 343
630
640
665
9 22-inch diameter borehole
22-inch borehole
Sand-Cement Grout
36-inch borehole
Sand-Cement Grout
391
22-inch
Filter Pack,
Silica Resources, Inc.
6 x 8

SOUNDING TUBE
OPENING (385-387 feet)
2-inch 304L stainless steel sounding
tube with threaded cap
2-inch stainless steel air vent
with threaded cap
3-inch stainless steel gravel feed
tube with threaded cap
3-inch 304L stainless steel
gravel feed tube
Well Contractor: Bakersfield Well and Pump Co.

Date Completed: December 1999
427
465
495

12.25-inch x 1/4 inch 304L stainless steel,
Ful-Flo Louver screen, 0.075-inc h slot

12.25-inch x 1/4 inch 304L stainless steel
blank casing

12.25-inch x 5/16 inch 304L
stainless steel blank casing

12.25-inch x 1/4 inch 304L stainless steel
casing with end cap
Depth Below Ground
Surface (feet)
top of well in vault 24-inch x 3/8-inch wall low
carbon steel conductor
Ground Surface
613
521
550
588
566

12.25-inch x 1/4 inch 304L stainless steel,
Ful-Flo Louver screen, 0.075" slot

12.25-inch x 1/4 inch 304L stainless steel
blank casing

As-Built Well Completion Schematic
Beverly Hills Well No. 6
53 345
650
670
680
9 22-inch diameter borehole
22-inch borehole
Sand-Cement Grout
36-inch borehole
Sand-Cement Grout
385
22-inch
Filter Pack,
Silica Resources, Inc.
6 x 12

SOUNDING TUBE
OPENING (?)
2-inch 304L stainless steel sounding
tube with threaded cap
2-inch stainless steel air vent
with threaded cap
3-inch stainless steel gravel feed
tube with threaded cap
3-inch 304L stainless steel
gravel feed tube
Well Contractor: Layne-Western Co., McCalla Div.

Date Completed: September 1999
?
440
485

12.25-inch x 1/4 inch 304L stainless
steel, Ful-Flo Louver screen,

0.070-inch slot

12.25-inch x 1/4 inch 304L stainless
steel blank casing

12.25-inch x 1/4 inch 304L
stainless steel blank casing

12.25-inch x 1/4 inch 304L stainless
steel casing with end cap
Depth Below Ground
Surface (feet)
top of well in vault 24-inch x 3/8-inch wall low
carbon steel conductor

12.25-inch x 1/4 inch 304L stainless
steel, Ful-Flo Louver screen,

0.070-inch slot
Ground Surface

SECTION 01146

CONSTRUCTION NOISE ABATEMENT
PART 1 - GENERAL
A. Scope
The Contractor is advised that the rehabilitation of Well Nos. 2, 4 and 6 will take place approximately 30 to 100 feet from residential properties. It shall be the Contractor's responsibility to comply with the following local noise level restrictions as defined in the City’s municipal ordinance.
8 a.m. to 6 p.m. Exceed ambient noise level at the property line by 5 dBa 6 p.m. to 8 a.m. No Work Allowed
The above noise levels are those measured from any parcel other than the property from which the noise is being generated. No work after 6:00 p.m. will be allowed.

B. Payment
No separate payment for noise abatement will be made. Payment for noise abatement shall be included in the other unit bid items.

PART 2 - EXECUTION
The Contractor shall take all steps necessary to keep within the listed noise level requirements as defined in the City’s municipal code.

END OF SECTION
SECTION 02529

MOBILIZATION, DEMOBILIZATION, AND SITE CLEAN-UP
PART 1 - GENERAL
A. Description
This section includes the mobilization and demobilization of equipment, material and personnel for each well site.

B. Related Work Specified Elsewhere

1. Noise Ordinance: See Special Provisions.

2. Protection of Site: See Special Provisions.

C. Measurement and Payment

1. Payment for mobilization shall be made at the lump sum price bid.

2. Payment for demobilization and site clean-up shall be made at the lump sum price bid. Payment will not be made until the site restoration has been approved by the Owner or the Owner's Representative.

PART 2 - EXECUTION
A. Mobilization
Mobilization shall include the purchase of Contract bonds and insurances; transportation of personnel, equipment, and operation supplies to and from the site; establishment of portable sanitary facilities, and other necessary facilities at the site; and other preparatory work at the site, as well as all work at the site necessary to conduct well rehabilitation, chemical treatment, development, and testing operations.

Mobilization shall include making and submitting a pre-mobilization video of the project site thoroughly depicting the as-is conditions of the site and facilities, including: access gates, driveway, perimeter wall/fence, structures, piping, electrical panels, etc.

Mobilization shall include moving associated well head improvements to provide access for well treatment, redevelopment and test pumping equipment. Mobilization includes providing one small, low-profile tank, and two large (21,000 gallon) storage tanks for containment of displacement fluids and for use as settling tanks during development.

Contractor will be responsible for protecting and repairing all surfaces, including pavement and curbs, and landscaping.

Other preparatory work shall include traffic abatement barricades, signs, ramps, as well as all necessary soundproofing and proper equipment mufflers. No noise abatement barriers are anticipated for this project.

The mobilization phase will be deemed complete when all items necessary to conduct field operations are on site and operable. The Contractor's Field Superintendent will provide 48-hours notification to the Owner's Representative prior to the start of removal of fill from the bottom of the well. The Contractor’s Field Superintendent will notify the Owner’s Representative whenthe mobilization phase, in his terms, is complete. No stand-by time will be allowed during the mobilization phase of the Contract.

B. Demobilization
Demobilization shall include installation of the permanent pump and operation of the pump as observed by the Owner’s Representative. Demobilization includes removal of all equipment, materials, and temporary facilities installed during mobilization, well treatment and redevelopment phases of the work. Demobilization will also include restoration of the site to its original or better condition and will include those items specified in the initial site report.

C. Site Clean-up

1. Developed Site
Demobilization and site restoration from a developed site will include, but not be limited to repair of the paved and unpaved ground surface disturbed during mobilization and rehabilitation operations; repair of the concrete pump pedestal that occurs during operations; reconstruction of fences, walls, berms, drains, or other surface features; sweeping of paved areas; repair or replacement of damaged asphalt pavement or concrete curb ; and replacement of bushes, trees, or ground cover, which were present prior to commencement of work.

END OF SECTION
SECTION 10020

BRUSHING
PART 1 - GENERAL
A. Scope
The Contractor will clean the entire length of the well casing below the static water level (approximately 120 feet) by brushing after chlorine is introduced into the well. The Contractor is advised that 12.25-inch diameter casing extends from the top of casing (9 feet below ground level) to the bottom of the sand cellar at depth 640 to 740 feet. Approximately 500-650 feet of casing will be brushed.

B. Payment
Payment shall be made at the hourly price bid for time spent brushing the well. No payment will be made for setting up equipment, assembling the brush, changing the brush or lowering the brush into the well. No payment shall be made to replace the brush to insure the proper brush diameter and that the brush fits tightly in the well.

PART 2 - EXECUTION
The Contractor shall introduce and disperse 10 gallons of sodium hypochlorite (30% active chlorine) throughout the well below the static water level. The Contractor then shall provide a new, heavy duty nylon-brush that fit tightly inside the

12.25-inch casing. The nylon-brush will be 10-feet long with a central section of pipe approximately 6 to 8-inches smaller in diameter than the well casing. The brush will be fitted with a swivel at the top to improve cleaning action. Brushing will be performed by using short strokes (1 to 2 feet) with a cable tool rig or pump rig. Brushing will continue for approximately 5 minutes for each 10-foot long interval of casing or screen for a total of 4 hours. Brushing should be accomplished with experienced personnel and care should be taken to not damage the well. Any fluids and debris removed from the well will be temporarily contained to allow the field geologist to observe and sample the material.

Discharge on the site will not be allowed to reach the storm drain or otherwise cause a nuisance or unacceptable discharge.

END OF SECTION
SECTION 10025

REMOVE FILL
PART 1 - GENERAL
A. Scope
Following brushing, the Contractor shall air lift all fill material collected at the bottom of the well and purge the well .

Approximately 30 feet of fill should be anticipated.

B. Payment
Payment shall be made at the lump sum price bid.

PART 2 - EXECUTION
The Contractor shall remove the fill by air-lifting and purge the well for 6 to 8 hours. Use of a large diameter, heavy scow will not be permitted. Fluids and debris will be temporarily contained to allow the field geologist to observe and sample the material. Fluid and debris discharged on site shall not be allowed to reach the drain inlet or otherwise cause a nuisance or unacceptable discharge. Clear fluid meeting NPDES discharge limits and free of chlorine will be discharged to the onsite drain inlet upon approval of the Owner’s Representative.

END OF SECTION
SECTION 10030

ACID CHEMICAL WELL TREATMENT
PART 1 - GENERAL
A. Description
This work will consist of one acid treatment, introducing NSF approved food grade 75% phosphoric acid NW-120 (H3PO4) and acid enhancer NW-310 into the well adjacent to the casing and screen intervals by pumping through a drop pipe supporting a double swab. Swabbing action will dislodge scale and bacterial fouling and force the chemical through the well screen into the filter pack and formation. Following contact time, the acid will be removed by double swab and airlifting.

B. Related Work Specified Elsewhere

1. Solids and Liquid Waste Disposal, NPDES Permit (Section 01410)

2. Safety Plan (Section 01329) submitted one week prior to start of acid treatment.

C. Measurement and Payment

1. Payment for chemical well treatment shall be made at the lump sum price bid.

2. Work shall include chemical dispersal by swabbing and removal by air-lifting.

PART 2 - MATERIALS
A. Mix NSF approved, food grade, 75 percent NW-120 liquid phosphoric acid with acid enhancer NW-310. The volume of chemical required for each well is:

Well No. NW-120 Phosphoric Acid NW-310 Biodispersant Potable Water 2 240 gallons 140 gallons 1,500 gallons
4 200 gallons 120 gallons 1,200 gallons
6 200 gallons 120 gallons 1,200 gallons
total 640 gallons 380 gallons
Total chemical required for treatment of the all three wells is 640 gallons of phosphoric acid and 380 gallons of NW-310.

PART 3 - EXECUTION
A. Notify the City 48 hours prior to the start of acid treatment. All chemicals shall be stored on the contractor’s equipment or in secondary containment vessels.

Contractor shall maintain a record of chemical volumes, mixing, chemical concentrations, and pH testing/monitoring in the well. A copy of the field record shall be submitted to the City.

C. Beginning above the top screen, introduce each batch into the well through a drop pipe supporting a 10-foot long perforated double swab tool with rubber swabs measuring approximately 12.3-inch diameter. After the chemical is placed in the drop pipe, an appropriate volume of potable water shall be used to flush the pipe and introduce the chemical in to the well screen. After the chemical is displaced into the well screen, each interval shall be swabbed for a minimum of 20 minutes to evenly distribute the solution through the well column. Lower the swab to the next interval (not to exceed 20 feet) and place the next small batch. Following placement of the final batch, swab each interval from bottom to top. Allow the solution to remain in the well for 12 hours.

D. Monitor the pH of the downhole solution and maintain at 3.0 or lower during the entire treatment process.

E. Approximately 12 hours after placing the acid, the well should be thoroughly agitated by swabbing for an additional 4 to 6 hours.

F. After the minimum contact time (12 hours) and agitation, at the direction of the geologist, the chemical should be removed from the well by double-swab and air-lifting. The perforated double swab shall not exceed 10-feet in length between two tight-fitting rubber swabs. The discharge fluids must be contained, and the chemical neutralized before disposal. At no time will the chemicals be neutralized in the well. Swabbing and air-lifting will be directed by the geologist and is estimated to require 40 to 50 hours per well. Air-lifting equipment shall be capable of a minimum of 250 gpm. Air lift the well until the pH has returned to normal (7.0 or greater), visible turbidity is zero, and the well discharge is clear. Collect and neutralize the evacuated fluid with soda ash above ground, and discharge according to the owner’s NPDES Permit (copy attached)

END OF SECTION
SECTION 10035

CHLORINE CHEMICAL WELL TREATMENT
PART 1 - GENERAL
A. Description
Following acid chemical treatment, the well should be treated using a pH-adjusted chlorination treatment of 350 ppm chlorine dose in a pH range of 6.5 to 7.0. The volume of the disinfection solution should be equivalent to 3 times the standing well volume of 2,000 to 2,400 gallons, or 6,000 to 7,200 gallons. This work will consist of introducing sodium hypochlorite and NW-410 chlorine enhancer into the well adjacent to the blank casing and screen intervals through a double swab. Swabbing will force the chemical through the well screen into the filter pack and formation.

B. Related Work Specified Elsewhere

3. Solids and Liquid Waste Disposal per NPDES permit (Section 01410)

4. Safety Plan (Section 01329) submitted one week prior to start of acid treatment.

C. Measurement and Payment

3. Payment for chlorine chemical well treatment shall be made at the lump sum price bid.

4. Work shall include chemical dispersal by jetting, double swabbing and removal by air-lifting.

PART 2 MATERIALS
A. Mix and introduce sodium hypochlorite (12 percent available chlorine) and NW-410 chlorine enhancer into the well at the following doses:

Well No. Sodium Hypochlorite NW-410 Chlorine
Enhancer
Potable Water
2 32 gallons 68 gallons 7,200 gallons
4 27 gallons 70 gallons 6,200 gallons
6 28 gallons 50 gallons 6,200 gallons
total 87 gallons 188 gallons
A total of 87 gallons of 12 percent sodium hypochlorite and 188 gallons of NW-410 shall be used.

PART 3 - EXECUTION
G. Notify the City 48 hours prior to the start of chlorine treatment. All chemicals shall be stored on the contractor’s equipment or in secondary containment vessels.

H. Contractor shall maintain a record of chemical volumes, mixing, chemical concentrations, an d chlorine testing/monitoring in the well. A copy of the field record shall be submitted to the City.

C. The disinfection solution should be blended above ground as follows: fill mixing tank with potable water, add NW-410 and blend thoroughly, check pH (5.5 to 6.0), add liquid chlorine and mix, and verify pH and chlorine concentration. The chemical mixture shall be introduced into the well through a 10-foot long double swab suspended on a drop pipe, beginning at the top of the well. Disperse the disinfection solution evenly throughout the well with the double swab and lightly agitate throughout the well column. Following agitation, check the chlorine residual within the well to ensure sufficient strength is present. If the chlorine residual has diminished below 150 ppm, add additional sodium hypochlorite to raise it to that level.

B. A small volume of chlorine solution will be placed down the sounding tube and flushed with potable water.

The disinfecting agent shall be left in the well overnight (minimum 12 hours).

E. After the minimum contact time (12 hours) and at the direction of the geologist, the chemical should be removed from the well by double-swab and air-lifting. The perforated double swab shall not exceed 10-feet in length between two tight-fitting rubber swabs (12.3-inch diameter). Begin evacuation of the well by swabbing and airlifting from the bottom, working upwards, until a minor residual (<50 ppm) is present and all debris has been evacuated from the well, as identified by visible turbidity. Swabbing and airlifting shall continue for 40 to 60 hours for each well. The discharge shall be contained in settling tanks to allow the removal of sediment (settleable and suspended) and dechlorination with sodium thiosulfate, prior to discharge in accordance with the owner’s NPDES Permit. At no time will the chemicals be neutralized in the well. Swabbing and air-lifting will be directed by the geologist and is estimated to require 12 hours to remove the chlorine. Air-lifting equipment shall be capable of a minimum of 250 gpm.

END OF SECTION
SECTION 10400

WELL DEVELOPMENT
PART 1 - GENERAL
A. Description
This section covers the redevelopment of the well using double swab and air-lift, and a test pump.

B. Related Work Specified Elsewhere

1. NPDES Permit – Special Provisions and Section 01410.

C. Measurement and Payment

1. Payment for well development will be made at the unit price bid per hour.

2. Payment for containing and treating well development discharge water for proper disposal to the local storm drain system shall be included in the unit price bid per hour for well development. The contractor shall comply with the owner’s NPDES discharge permit.

3. Payment for temporary discharge piping will be included in the unit price bid per hour of well development.

4. The time required for well development will be recorded by the hour with 15-minute intervals as the smallest unit of recorded time. The time recorded for payment shall commence when the equipment installed in the well is placed in operation and shall end when development, pumping or testing are stopped at the direction of the Owner's Representative. No payment will be made for running equipment into or out of the well.

5. No payment will be made for delays resulting from (1) equipment stuck in the hole; (2) equipment breakdown; (3) arranging major equipment, pumping or testing apparatus; or (4) failure to conduct the operations in a di ligent and workmanlike manner by which the desired results could ordinarily be expected.

PART 2 - MATERIALS
B. Swab
Swabbing of the well shall be done with a close fitting double swab whose outside diameter of the surge blocks shall be approximately 12.3-inches. The perforated section between the surge blocks shall measure no less than 10 feet and no more than 15 feet in length. Individual perforations shall be small and distributed evenly throughout the circumference and length of the swab tool. Total open area of the perforations shall not exceed the inside cross-sectional area of the pipe.

B. Eductor Pipe
The eductor pipe used to support the double swab shall have an inside diameter that allows an air lift pumping rate of 300 gpm.

C. Drawworks Line Speed
The drawworks shall move the double swab and eductor pipe at an up and down line speed of approximately 50 to 100 feet per minute.

D. Temporary Water Containment
The Contractor shall provide adequate containment of all discharge waters to permit settlement of suspended solids to a level acceptable by the owner’s representative for discharge to the local storm drain system or approved discharge point.

E. Discharge Line
The Contractor shall provide the temporary discharge piping required to convey well development water to the appropriate disposal area.

F. Test Pump and Flow Meter
The pump furnished shall be of the deep well turbine type capable of pumping up to 1,000 gallons per minute (gpm) from a depth of 340 feet. The test pump diameter shall accommodate installation of a 2-inch diameter access pipe (spinner and depth-specific sampling tools) extending below the pump suction. A satisfactory throttling device shall be provided downstream of the flow meter and manometer so that the discharge can be reduced to 300 gpm. An in-line flow meter with 6-digit straight reading totalizer and rate of flow indicator dial, which reads in gallons per minute, will be installed in the discharge pipe.

F. Test Engine
The test engine shall perform consistently and continuously without erratic or variable rpm. The test engine shall be equipped with mufflers and additional sound proofing at the engine to meet the noise reduction requirements as required by the City’s municipal code. The test engine shall not expel oil, fuel or hydraulic fluids from the blow-by or exhaust.

PART 3 - EXECUTION
A. Record Keeping

1. The Contractor shall prepare a daily log documenting the start and end time of development, flow rates, field water quality parameters of discharge water (pH, temperature, electrical conductivity, turbidity, chlorine residual), and sand content.

2. A copy of the daily field log shall be submitted to the Owner at the conclusion of air lift development and after pumping development.

B. Development with Air-Lift Swab

1. The Contractor shall commence development with air- lift swab equipment within 12 hours after completion of the chlorine treatment and chlorine removal.

2. Air-lift swab development shall proceed from the top of the screen to the bottom of the screen. Swabbing shall continue for the full depth of the well.

3. The double swab shall be raised and lowered for a minimum of 20 minutes every 20 feet of screen.

Simultaneously, water shall be lifted with air inside the drop pipe. After the water becomes free of sediment and there is no more movement of the gravel pack, the swab shall be lowered to the next interval.

4. The Contractor shall run clean water continuously down the gravel feed tube during the operation and add gravel as needed.

5. The Contractor shall suction bail or air-lift sediment from the bottom of the well as required.

6. It is anticipated that surging and air lifting shall continue for approximately 24 hours or until all sand and mud have been washed
through screened sections of the well to the satisfaction of the Owner's Representative. Upon completion of this procedure, the well shall again be bailed or air lifted clean of all accumulated sediment to its full depth.

C. Development with Test Pump

1. Within 2 to 5 days after completion of well development using the air-lift swab, the Contractor shall commence well development by using the test pump.

2. The quantity of water being pumped from the well at commencement of development pumping shall be limited and gradually increased as the water clears. From time to time, the pump shall be stopped and the water in the pump column allowed to flow back through the pump bowls and through the screened sections of the well into the aquifers. This procedure, with increasing pumping rates, shall be repeated as development of the well continues and shall be done in a manner satisfactory to the Owner's Representative.

3. Development of the well shall be continued for approximately 24 hours or until the well produces not more than 2 parts per million of sand by volume, 15 to 20 minutes after surging at a pumping rate of 800 to 900 gpm.

4. During the development, the rate of sand production shall be measured by the Contractor using a centrifugal sand separating meter as described in the Journal of American Water Works Association, Volume 46, No. 2, February 1954. The centrifugal sand-
separating meter shall be furnished by the
Contractor. The results of all sand production tests shall be expressed in parts per million at 5 minute intervals and shall be provided to the Owner's Representative immediately. The final sand production test shall be conducted in the Owner's Representative's presence.

5. Clean water shall be added continuously down the gravel feed tube during development.

6. If, during the development operations, there is any indication of settlement of the gravel envelope, more gravel shall be added as needed and the quantity recorded and reported to Owner's Representative.

7. After completion of de velopment pumping, the Contractor shall measure the depth of the well to determine the amount of sediment deposited in the bottom. If the amount of sediment is greater than 10 feet, the Contractor shall pull the pump and clean the well of all accumulated sediment and foreign material and reinstall the pump.

END OF SECTION
SECTION 10405

FLOW METER SURVEY AND DEPTH-SPECIFIC SAMPLING
PART 1 - GENERAL
A. Description
This section covers the performance of a vertical spinner flow meter survey to determine the relative production from each screen interval. The flow meter survey shall be performed during the end of the constant discharge pumping test. Depth-specific water samples shall be collected based on the results of the spinner survey.

B. Submittal
Contractor shall submit the name and qualifications of the firm retained to conduct the flow meter survey with the Bid Documents.

C. Measurement and Payment

1. Payment for the flow meter survey shall be made at the lump sum price bid and shall include the cost for pulling the pump, cleaning the well, and reinstalling the pump.

2. Payment for depth-specific water samples will be made at the unit cost bid.

3. No additional payment will be made for pump crew, pump time or idle time while the survey is being run.

PART 2 MATERIALS
A. The spinner flowmeter equipment shall be run on a wire line and capable of both static measurements and dynamic down-well runs, to continuously measure and record vertical flow (fluid velocity) in the well. The equipment shall be equipped with a line speed indicator that is recorded on the log for each dynamic down run.

PART 3 - EXECUTION
A. Upon completion of any required well cleaning after pumping development, the Contractor shall reinstall the pumping equipment used for well development along with 2-inch diameter access tube. The flow meter survey shall be performed during the last hours of the constant discharge pumping test.

B. The flow meter survey shall be conducted from the base of the 2-inch access to the top of the sand cellar. The survey shall be run at a constant discharge rate that will be determined in the field by the Owner's Representative.

Both static and dynamic tests shall be made from the base of the 2-inch sounding tube/temporary access tube to the bottom of the well, as directed by the Owner's Representative. Each static test shall consist of two-minute readings made at 10-foot increments. Three dynamic runs in the downward direction shall be conducted at varying line speeds selected in the field to optimize deflection on the spinner rates. The record for each test shall indicate either meter speed or percentage of total meter speed with depth. The meter used for the survey shall be calibrated within the uppermost and lowermost blank sections of the well casing.

C. The flow meter survey shall become the property of the Owner at the time the survey is completed. The survey shall be run in the presence of the Owner's Representative. The Contractor shall providefour (4) field copies of the survey to the Owner's Representative immediately upon completion. The Contractor and his Subcontractor will provide an analysis of the flow data estimating relative production. Provide a profile of the relative production at minimum of 1-foot increments where zonal percentage of flow and fluid velocity can be derived over any given interval (intervals shall be determined by Owner’s Representative). Provideseven final copies of the spinner logs and within 7-days of completion, at no additional cost.

Flow meter survey measurements shall be run on
digital/analog equipment. Results of the spinner survey shall be provided in the following electronic digital formats on CD/DVD: TIFF, DWG or DXF (compatible with AutoCAD) and ASCII.

D. The Contractor shall be required to provide whatever assistance may be required to accomplish the flow meter survey.

E. Depth-specific water samples shall be collected at depths determined by the Owner’s Representative after reviewing the spinner log. The contractor shall obtain up to 2 liters of sample at each depth. The sampler shall be placed under vacuum pressure to obtain discrete samples at the specified depth. The sample equipment shall be disassembled and thoroughly cleaned prior to collecting each sample.

F. After the flow meter survey, the Contractor shall remove all sediment from the bottom of the well and demonstrate that the well has been properly cleaned by measuring the depth of the well in the presence of the Owner's Representative.

END OF SECTION
SECTION 10410

WELL PRODUCTION AND AQUIFER TESTS
PART 1 - GENERAL
A. Description
This section covers pumping tests that include the step drawdown test with increasing discharge rate; a constant rate discharge test; and time-recovery test.

B. Measurement and Payment

1. Payment for testing will be made at the unit price bid per hour.

2. Payment for containing and treating pumping test discharge water for proper disposal to the local storm drain system or approved discharge point shall be included in the unit price bid per hour for test pumping.

3. Payment for temporary discharge piping will be included in the unit price bid for test pumping.

4. The time required for testing will be recorded at one-half hour intervals as the smallest unit of recorded time. The time recorded for payment shall commence when the equipment installed in the well is placed in operation and shall end when the operation is stopped at the direction of the Owner's Representative.

5. No payment will be made for delays resulting from (1) equipment stuck in the hole; (2) equipment breakdown; (3) arranging major drilling, pumping or testing apparatus; or (4) failure to conduct the operations in a diligent and workmanlike manner by which the desired results could ordinarily be expected.

PART 2 - MATERIALS
A. Discharge Line and Meter
The Contractor shall provide the temporary discharge piping required to convey well testing water to the appropriate discharge point as shown on the project plans. The discharge pipe shall include an in-line meter with 6-digit, straight reading totalizer, registering in units of 100 gallons with a rate of flow indicator dial which reads in gallons per minute, and is suitable for a flow range of 300 to 2000 gpm. The flow meter shall be factory calibrated at three different rates (500, 750, and 1000 gpm) prior to use on this job. The Contractor shall furnish results of the manufacturer’s calibration to the Owner’s Representative prior to conducting the pumping tests.The discharge line shall also include a tap not more than 20 feet from the well with a valve to take water samples and measuring sand content.

C. Test Pump
The pump furnished shall be of the deep well turbine type capable of pumping up to 1000 gallons per minute (gpm) from an estimated maximum pumping level of 320 feet. A satisfactory throttling device shall be provided downstream of the flow meter so that the discharge can be reduced to 300 gpm.

D. Water Level Probe
The Contractor shall furnish an electrical depth gage capable of indicating changes in the well water level to the nearest one-hundredth foot and shall furnish and install an air line with direct reading gage calibrated in feet. The Contractor shall provide whatever assistance may be required by the Owner's Representative.

PART 3 - EXECUTION
A. General
Within 48 hours after the completion of well development with a test pump, the Contractor shall commence the well production and aquifer tests. The Contractor shall schedule all tests in advance so that the Owner's Representative can be on site throughout each testing period.

B. Step Drawdown Test

1. The well shall be "step" tested at rates of approximately 1/2, 3/4, 1, and 1-1/4 times the capacity of the well, unless otherwise directed by the Owner's Representative. The original capacity of the well was 1,000 gpm.

2. The complete test for the well is estimated to require approximately 12 hours.

3. The Contractor shall operate the pump and change the discharge rate as directed by the Owner's Representative.

4. Discharge rate from the pump shall be controlled by both a gate valve and engine throttle. The discharge shall be controlled and maintained at approximately the desired discharge for each step with an accuracy of at least plus or minus 5 percent.

5. During the test, the Contractor will record the time, pumping level, discharge rate, and rate of sand production every 15 minutes.

6. The rate of sand production will be measured by the Contractor using a centrifugal sand separating meter as described in the Journal of American Water Works Association, Volume 46, No. 2, February 1954. Rate of sand production will be determined at 5-minute intervals. The results of all sand production tests will be expressed in parts per million at 5 minute intervals.

The centrifugal sand-separating meter shall be furnished and installed by the Contractor.

C. Constant Discharge Test

1. A constant discharge test shall commence not less than 12 hours after completion of the step drawdown test. The rate of pumping shall be determined by the Owner's Representative. The Contractor shall insure that the pumping rate selected remains constant throughout the test. The test duration shall be approximately 12 hours. When the test is completed and the pump stopped, the Owner's Representative will measure recovery of the water level in the well for a period of approximately 24 hours.

2. During the drawdown and recovery tests, the Contractor will record the discharge rate, sand production rate, the time and measure the water level in the pumped well at 15 minute intervals.

3. The Contractor shall provide experienced and qualified personnel on a 24-hour basis during both the step drawdown and constant discharge pumping tests to assure proper operation of the pumping test equipment and assist Owner's Representative when necessary.

4. No payment will be made to the Contractor for pumping tests interrupted by the malfunctioning or failure of pumping equipment. If the test is interrupted, the water levels will be allowed to fully recover, after which the test will be restarted.

5. When the production tests are complete, Contractor shall remove the pump and clean the well of all accumulated sediment and foreign material. The Contractor shall demonstrate that the well has been properly cleaned by measuring the depth of the well in the Owner's presence.

END OF SECTION
SECTION 10510

VIDEO CAMERA SURVEY
PART 1 - GENERAL
A. Description
This section covers the performance of a color video camera survey over the full depth of the well. The camera survey will be run by a firm retained by the Contractor and approved by the Owner's Representative.

B. Submittal

1. The Contractor shall submit the name and qualifications of the firm retained to perform the camera survey with the Bid Documents.

2. The DVD disks shall be provided to the Owner's Representative at the time the survey is completed.

C. Measurement and Payment

1. The payment for the survey shall be at the bid lump sum price.

2. There will be no additional payment for rig time or idle time while the survey is being run.

PART 2 - MATERIALS
A. Camera
The camera used for the survey shall be equipped with centralizers and dual lens to provide both vertical (axial) and side scan without the use of mirrors. High resolution 3.5-inch diameter camera should be provided to access the open well and/or permanent 4-inch diameter sounding tube with camera port. The equipment used by the firm for the color video camera survey shall produce a recording with an automatic depth indication.

B. Digital Video Disks
The Contractor shall provide the Owner's Representative with four (4) DVD disks of the camera survey.

PART 3 - EXECUTION
A. Prior to conducting the camera survey, all tools shall be pulled and the well allowed to remain idle for at least 24 hours. During this period and the camera survey, 15 gpm of clear water shall be run in to the well below the water surface. The camera survey shall be run for the full depth of the well. The survey shall be run in the presence of the Owner's Representative. If the water clarity prevents a clear video survey, the survey will be rerun after corrective measures are implemented by the Contractor.

B. The Contractor shall be required to provide whatever assistance may be required to accomplish the camera survey.

C. The video survey shall become the property of the Owner's Representative at the time each survey is completed.

END OF SECTION
SECTION 10520

WELL DISINFECTION
PART 1 - GENERAL
A. Description
This section covers the disinfection of the well using chlorine per the State of California Water Well Standards and AWWA Standard C654-13.

B. Payment
Payment shall be made at the lump sum price bid.

PART 2 - MATERIALS
The disinfectant shall be sodium hypochlorite (12.5 percent available chlorine) in liquid form, used at a dose of 1 gallon per 1,000 gallons of well volume, and pH adjustment with NW-410 at a dose of 1 gallon per 1,000 gallons of well volume.

PART 3 - EXECUTION
A. The disinfecting agent and NW-410 shall be premixed and shall be uniformly applied throughout the entire water depth of the well using a drop pipe or perforated double swab. The dispersion of the disinfectant shall be assisted by pouring into the well a volume of water equal to the volume of water contained in the well, after the disinfectant has been emplaced. This will cause the disinfectant to flow out of the well into the area adjacent to the screen. A small volume of disinfection solution shall be placed down the sounding tube.

C. All accessible portions of the well above the water level shall be maintained in a damp condition with water containing the required concentration of disinfecting agent for a period of not less than 20 minutes. The disinfecting agent shall be left in the well.

END OF SECTION

TECHNICAL SPECIFICATIONS
SECTION 1
SCOPE OF WORK WELL F-3A REHABILITATION
PART 1 - GENERAL
The work to be performed and bid complete herein, shall be as shown and specified in the Technical Specifications and on the Plans and generally described as supplying all labor, equipment, materials and forces necessary to complete work on:

Rehabilitation (redevelopment) of City of Fullerton water supply well number 3A (F-3A) via wire brushing, chemical acid treatment, chemical chlorine treatment, double-swab airlifting, open-ended airlifting, pump-surge development, and aquifer testing. The actual redevelopment procedures may vary based on field conditions.

Project location map are shown in the Figures.

All work shall be completed in compliance with the latest edition or supplement of:

State of California Water Well Standards, Bulletin No. 74-81 dated December 1981 and Bulletin No. 74-90 dated June 1991, local modifications to these standards and sections 13800 through 13806 of the California Water Code.

Upon finalization of the Contract Documents, the Work shall be completed within the Time of Completion Schedule described in the Special Provisions and as outlined in the Notice to Proceed for the Work. Redevelopment of F-3A will generally include but not be limited to the following sequence of activities:

1. Provide evidence of a work site Health and Safety Plan for review by the Engineer.

2. Mobilize to and demobilize from the well site.

3. Meet all noise, traffic control, and security requirements.

4. Chlorinate the well via basket-strainer method.

5. Wire brush the blank pump chamber, blank well casing and louvered well screen.

6. Complete video survey.

7. Remove fill from the bottom of the well via open-ended air lifting if needed.

8. Complete chemical acid-treatment of the well via pumping and swabbing an acid solution with bio-dispersant into discrete intervals of the well

screen.

9. Completed double-swab airlift removal of chemical acid solution.

10. Complete chlorine chemical treatment of the well via pumping and swabbing a chlorine solution with chlorine enhancer into discrete intervals of the well screen.

11. Completed double-swab airlift removal of chlorine chemical solution.

12. Install the test pump and complete test pump surge development.

13. Complete aquifer testing included a 12-hour step test and 12-hour constant rate test with 8-hour recovery.

14. Remove the test pump.

15. Chlorinate the well via basket-strainer method.

16. Maintain the site during the work and perform final site clean-up and restoration.

17. Provide all records, as required.

The Contractor shall be responsible for the protection of public and private properties adjacent to the work and shall exercise due caution to avoid damage to such properties. The Contractor shall repair or replace all existing improvements that are damaged or removed as a result of his operations. Such improvements may include well head facilities, curbs, gutters, sidewalks, pavements, utility installations, structures, lawns (by installing sod), etc. Repair and replacements shall be at least equal to existing improvements and shall match them in finish and dimension. Discharge of redevelopment and aquifer testing fluids shall meet NPDES requirements.

END OF SECTION
SECTION 2

LOCAL CONDITIONS AND WELL DETAILS
PART 1 - GENERAL
A. Site Conditions – Well F-3A is located in the City of Anaheim approximately 1,000 feet northwest of the corner of Harbor Boulevard and La Palma Avenue (Figures). The well site is in the City of Fullerton well field containing several water supply wells within an approximate 5 acre dirt lot.

The Contractor shall be responsible for making a site visit prior to commencement of construction work to establish the type of area, sources of access, water and power, location of utilities, overhead obstructions, and consider all other factors involved to properly complete his tasks under this Contract. For the purposes of preparing the bid for site clean-up, the Contractor shall prepare an initial site report which shall include a written account of all alterations and preparations that must be made to the Site to make the Site accessible and suitable for construction work, and to restore the Site to its previous condition.

The site-specific access and restoration bid items should take into account ordinary site restoration costs, as it is described in the Technical Specifications.

Out of ordinary costs are those restoration items that are not to be recognized in the site description and may be unforeseen prior to the commencement of mobilization. Out of ordinary items invoiced for site restoration shall be paid at an invoiced cost plus an additional 15 percent. The District will not be responsible for payment of charges not covered in the initial site report, or prior to actual mobilization.

B. Well details – Well F-3A was constructed in 1995 via the reverse circulation drilling method. The well is constructed using carbon steel blank well casing and louvered well screen. Well construction details are shown in the figures.

Pumping test details are listed below in Table 1.

Table 1. F-3A Pumping Test Data

YEAR PUMPING
RATE
STATIC
WATER
LEVEL

DRAWDOWN
(feet)

SPECIFIC

CAPACITY COMMENTS
1995 4,032 109.99 25.51 158 Aquifer Test
(28-hour)
2012 2,940 98.7 104.8 28 Short-Term Test
2015 3,628 133.5 44.7 81 Short-Term Test
2016 3,675 122.8 52.4 70 Short-Term Test
2018 2,409 106.6 48.5 50 Short-Term Test

END OF SECTION

SECTION 3

MOBILIZATION, DEMOBILIZATION, AND SITE CLEAN-UP
PART 1 - GENERAL
A. Description
This section includes the mobilization and demobilization of equipment, material, and personnel to the Site, as well as related preparatory work. The contractor shall commence work on or before the tenth (10th) day after receiving the Notice to Proceed.

B. Submittals

1. Contractor’s Health and Safety Plan.

2. The Contractor shall submit its California Regional Water Board, Santa Ana Region (RWQCB) NPDES dewatering permit to the Engineer prior to mobilization.

C. Related Work Specified Elsewhere

1. Special Provisions: Temporary Facilities

2. Special Provisions: Legal Responsibilities

3. Technical Specifications: Temporary Facilities and Noise Control D. Measurement and Payment

1. Payment for mobilization of redevelopment equipment shall be made at the lump sum price.

2. Payment for all City of Anaheim permits shall be included in the lump sum price for mobilization.

3. Payment for obtaining a RWQCB NPDES Permit shall be included in the lump sum price for mobilization

4. Payment for laboratory analysis needed to comply with the RWQCB NPDES Discharge Permit shall be included in the lump sum price for mobilization.

5. Payment for delivery, set-up, and operation of settling tanks, discharge pipeline, sidewalk crossings, and road crossings shall be included in the lump sum price for mobilization.

6. Payment for demobilization shall be made at the lump sum price.

7. Payment for site clean-up and restoration shall be included in the lump sum price for demobilization and will not be made until all equipment, material, and personnel have been removed from the project area and the site has been restored to the pre-construction condition.

PART 2 - EXECUTION
A. Mobilization
Mobilization shall include movement of all equipment, material, and personnel to the well site. In addition, mobilization shall include the purchase of Contract bonds; required permits; business licenses, insurance; site security; financing; transportation and movement of personnel, equipment, and operating supplies to and from the Site; establishment of portable sanitary facilities, drinking water, chemical mixing water, and other necessary facilities at the Site; and other preparatory work at the Site, as well as all work at the Site necessary to conduct redevelopment operations. Additional preparatory work might include traffic abatement barricades, signs, ramps, earthworks, and noise control.

The Contractor shall determine location, access, pay for and shall construct all facilities necessary to furnish water for its use during construction of the Work, as specified in the Special Provisions. All preparatory work associated with installation and maintenance of a water supply line shall be included in mobilization costs.

The well site is located in the City of Anaheim on property owned by the City of Fullerton. Any required encroachment permits, Business License, approval fees, etc. shall be the responsibility of the Contractor and shall be covered in the unit price for mobilization. Mobilization shall also include Contractor equipment necessary to comply with local noise ordinances as specified in the Special Provisions.

The District will obtain the required Encroachment from the County of Orange to discharge water to the County storm drain.

The Contractor shall obtain the required California Regional Water Board, Santa Ana Region (RWQCB) General Discharge Permit, Order No. R8-2012- 0027/NPDES Permit No. CAG918001. Order WQ 2014-0194-DWQ, General Order No. CAG140001 (Statewide NPDES Permit for Drinking Water System Discharges to Waters of the United States).

The mobilization phase will be deemed complete when all items necessary to conduct field operations are on-site and operable. The Contractor's Field Superintendent shall notify the Engineer prior to 4:00 p.m. when the mobilization phase, in his terms, is complete. The Engineer, upon site inspection and approval, will then allow redevelopment to commence the

following morning at 7:00 am. If the Engineer does not approve the Site, redevelopment shall not commence the following day and the Contractor's Superintendent shall re-notify the Engineer for additional site inspections. No stand-by time will be allowed during the mobilization phase of the Contract.

B. Demobilization
Demobilization shall include removal of all equipment, materials, and temporary facilities (including water tanks and discharge pipes) installed during mobilization, well redevelopment operations, and site clean-up phases of the Work.

C. Site Clean-up and Restoration
Site clean-up and restoration includes restoration of the Site to its original condition and shall also include those items specified in the initial site report as well as items listed below. The Contractor shall provide all equipment and personnel to restore the Site as required. The Contractor shall demobilize from the project area after completion of all work associated with the well site.

1. Site Restoration
Site restoration shall include, but not be limited to, repair of any asphalt, curb, sidewalk, grass (by installing sod) or other surface features disturbed by the Work, which were present prior to commencement of the Work. All repairs needed as a result of the Work shall be repaired to the satisfaction of the Engineer.

2. Nonhazardous Materials
Cleanup of the Site shall include complete removal and disposal of all solids, liquids and substances either used or generated during mobilization, demobilization, and redevelopment operations. The Contractor shall dispose of the solids and fluids in accordance with all applicable laws and regulations.

The Contractor shall be responsible for disposal of solids and fluids generated during redevelopment operations that are not suitable for discharge.

3. Hazardous Materials
Any materials suspected by the Engineer of being contaminated due to ambient conditions shall be submitted to a California-certified laboratory for analysis by the Contractor. The Contractor shall properly dispose of any sample which contains levels of contaminants in excess of federal and state disposal standards.

Generation of hazardous materials by the Contractor during the course of work caused by his negligence (e.g., oil, and/or hydraulic spills or leaks) shall be cleaned, removed, and properly disposed at the sole cost of the Contractor. Any materials suspected of contamination due to Contractor negligence shall be submitted by the Contractor to a state- certified laboratory for analysis at the Contractor's expense. The sample shall be analyzed by approved state and/or federal methods to determine if the sample contains hazardous materials. The District reserves the right to request additional testing if the methods requested by the Contractor are insufficient to determine the types of potentially hazardous materials. Tests must be run within 24 working hours of suspected contamination. The Contractor in accordance with applicable federal and state laws shall properly dispose any sample that contains levels of contaminants in excess of state or federal disposal standards within 48 working hours of receiving test results. This shall include preparation of a hazardous materials disposal manifest by the Contractor, and the Contractor, not the District, shall be listed as the generator of the hazardous waste on all manifests. The Contractor shall provide the District with a copy of the initial manifest and the final manifest received at the disposal site.

4. Payment
Payment will be made on a monthly basis as the Work proceeds, after presentation of invoices by the Contractor showing their unit costs and evidence of the charges of suppliers, subcontractors, and others for work performed by them. Each invoice shall clearly be marked with the District contract number and the well name (i.e., F-3A). An invoice shall show itemized charges corresponding to the bid proposal item numbers as the tasks defined herein are completed. For an individual project, each invoice shall be submitted properly labeled with the progress billing number (i.e., 1st billing, 2nd billing, final billing, etc.); total amount billed to-date; less previous net payments received by the Contractor; and current net due this invoice unless otherwise approved by the Engineer.

If the District is billed in error, the Contractor shall promptly issue a credit memo to correct such an invoice. The Contractor should itemize the invoice as the sum of the original Work Order issued and subsequent change orders, signed and returned to the District. Any invoice that does not clearly indicate all of the above items will be returned to the Contractor unpaid, for corrections. Any invoice not accompanied by applicable subcontractor invoices shall be held until such submittals are received.

Total payment shall be made at the unit price for mobilization and demobilization, regardless of actual cost to the Contractor, plus the total

of all unit price items furnished. Payment shall not be made under the mobilization item for the purchase costs of incidental materials having a residual value, the purchase costs of incidental materials to be incorporated in the project, or the purchase costs of operating supplies.

Site facilities (e.g., pavement, curbs, sidewalks, landscaping, etc.) damaged by the Contractor due to negligence, shall be re-paved or replaced at the expense of the Contractor.

D. Final Inspection
The Engineer and the property owner representative shall make an inspection of the Site following completion of all site cleanup and restoration work by the Contractor. The Contractor shall also be present to acknowledge any items that require additional work to make the Site acceptable to the Engineer. Final payment for the Work shall not be granted until the Site and the well have been determined acceptable to the Engineer.

END OF SECTION
SECTION 4

TEMPORARY FACILITIES AND NOISE CONTROL
PART 1 - GENERAL
A. Description
All equipment supplied by the Contractor shall be available for inspection by the Engineer prior to the beginning of redevelopment operations. If, in the opinion of the Engineer, any of the equipment is not suitable for redevelopment operations, either because of mechanical problems, excessive noise, deviation from the specifications, or the build-up of substances which could cause contamination (i.e., from oil, diesel, hydraulic leaks or exhaust residue, etc.), the Contractor shall adjust, decontaminate, or replace or it with suitable equipment at its own expense.

B. Submittals

1. NOT USED
C. Related Work Specified Elsewhere

1. Special Provisions: Temporary Facilities

2. Special Provisions: Legal Responsibilities

3. Technical Specifications: Mobilization, Demobilization, and Site Clean-up
D. Measurement and Payment

1. NOT USED
PART 2 – MATERIALS
A. Redevelopment Rig
The redevelopment unit and associated equipment used during redevelopment operations shall be in good condition and have sufficient capacity to complete the redevelopment tasks specified herein to a depth of 1,300 feet. The mast and all running gear (hoists, cables, etc.) of the redevelopment rig shall have a proven, sufficient and demonstrated capacity to lift three times the buoyant weight of the pipe and tools used during redevelopment activities.

B. Holding Tanks
Development fluids and solids shall be containerized at the work site then disposed by the Contractor. Containers and tanks must be preapproved by the Engineer before they are brought to the well site. It is anticipated that flow rates will be 100 to 300 gpm while airlifting and 500 to 4,500 gpm while pumping. The Contractor shall provide adequate containment of all discharge waters to permit settlement of suspended solids to an acceptable level for discharge to the local storm drain system or approved discharge point. The Contractor shall anticipate/provide adequate containment volume (e.g., number of tanks) to maintain effective operations.

C. Discharge Piping
The Contractor shall provide and install all temporary discharge piping required to convey well redevelopment fluids to the appropriate holding tanks and the nearest storm drain catch basin. The discharge piping at the wellhead shall include a Rossum Sand Tester, butterfly valve for controlling flow rates, sample port for collecting groundwater samples, and an in-line flow meter and totalizer.

At all locations where discharge piping crosses a sidewalk, driveway, or street, the Contractor shall provide and install suitable sidewalk and/or road crossings rated for vehicular traffic. The sidewalk and road crossings shall be ADA approved.

D. Air Compressor, Airline, and Eductor Pipe
The Contractor shall furnish an air compressor with airline, eductor pipe and appropriate fittings shall be on-site during the airlifting phase of well redevelopment. The compressor shall be of ample size for maximum airlifting capabilities with a minimum rating of 900 CFM and 250 psi, and shall include an effective external air-oil separator. The size of the airline shall have an appropriate inner diameter to ensure good flow rates through the eductor pipe, and shall be fitted with a dump valve capable of discharging “downhole” air to the atmosphere. Eductor pipe used during open-ended and double- swab airlifting shall be minimum 5-inch nominal diameter. The bottom of the open-ended pipe shall be cut at a 45 degree angle to facilitate clean-out of all fill from the bottom of the well
E. Site Runoff Containment
In order to contain any spills of any kind or rainwater or other runoff from the Site, the Contractor shall be required to place and maintain the redevelopment unit and associated equipment within a bermed containment area constructed with plastic sheeting and sand bags or earthen berms. Sand bags will also be required to be placed around the Site where fluids can be collected and immediately transferred to containers. No fluids or sediment shall be allowed to leave the Site or reach the nearest storm drain inlet. Potentially hazardous materials (e.g., diesel fuel or oils) shall be required to be contained separately.

If necessary, the contractor shall employ sufficient staff on the Work in order to maintain an orderly Site as desired by the District and local ordinances.

PART 3 – EXECUTION
A. Site Security
In addition to a fully enclosed perimeter fence, a security guard (s) or other security measures, provided at the contractor’s expense, may be necessary to protect the Site from unauthorized entry and/or vandalism during times when no activity is occurring at the Site (e.g. night time or days off), as specified in the Special Provisions.

B. Noise Attenuation/Suppression
All on-site mobilization, airlifting, pumping, swabbing, bailing, demobilization, cleanup, and restoration must be conducted within the guidelines of the City of Anaheim.

If, at any time during any phase of the Work, the noise limits are exceeded or disturbances cited, immediate corrective action shall be taken through equipment modifications, addition of noise abatement equipment, addition of noise barrier walls or change in operating procedures. Once the corrective action has been taken, the Contractor shall be responsible to demonstrate through actual noise level measurements, that they are in compliance.

END OF SECTION

SECTION 5

DISINFECTION
PART 1 - GENERAL
A. Description
This section includes disinfection of the well casing and water column via chlorinating using the basket-strainer method prior to brushing and after aquifer testing.

B. Submittals

1. SDS sheets for all chemicals to be used during disinfection.

C. Measurement and Payment

1. Payment for disinfection shall be made at the unit price for each application.

PART 2 – PRODUCTS
A. Chlorine Disinfectant
The disinfectant shall be calcium hypochlorite dry powder (granular), 70% free chlorine, added to the well at a dosage of 16 ounces (1 pound) per 100 feet of wetted 20-inch diameter casing and 10 ounces per 100 feet of 16-inch diameter casing per the State of California Water Well Standards.

PART 3 - EXECUTION
A. A doubly-capped, perforated pipe container filled with the granular chlorine compound shall be moved up and down the entire water-filled casing and screen section until all of the chlorine has dissolved.

B. The chlorinated water shall remain in the well.

END OF SECTION
SECTION 6

WIRE BRUSHING
PART 1 - GENERAL
A. Description
This section includes wire brushing of the blank well casing and louvered well screen to remove biofouling and scale.

B. Related Work Specified Elsewhere

1. Technical Specifications: Temporary Facilities and Noise Control C. Submittals NOT USED.

D. Measurement and Payment

1. Payment for wire brushing shall be made at unit bid price per hour. No payment will be made for setting up equipment, assembling the brush, changing the brush or lowering the brush into the well.

PART 2 - MATERIALS
A. Wire Brush
The wire brush shall be constructed of steel wire rope drawn through holes in a section of pipe 5 to 10-foot long and approximately 8 inches smaller in diameter than the well casing. The wire brush shall fit tightly in the well casing to facilitate the brushing action. The wire brush shall be fitted with a swivel at the top to improve cleaning action.

PART 3 - EXECUTION
A. The Contractor shall perform wire brushing of the 20-inch blank well casing by running the brush up and down through the entire interval for 2 hours.

B. The Contractor shall perform wire brushing of the 16-inch blank casing and screen by using short strokes (1 to 2 feet) using a cable tool rig or rig with similar capabilities. Brushing shall continue for approximately 5 to 10 minutes (or more) for each 10-foot long interval of blank well casing and screen (16 hours total). Brushing shall be accomplished with experienced personnel and care shall be taken to not damage the well.

END OF SECTION
SECTION 7

WELL FILL REMOVAL
PART 1 - GENERAL
A. Scope of Work
This section covers removal of accumulated fill at the bottom of the well via open-ended airlifting or suction bailing. Fill removal may be required at any time during the redevelopment work.

B. Related Work Specified Elsewhere

1. Technical Specifications: Temporary Facilities and Noise Control C. Submittals:

1. Detailed description and pictures of the bailer to be used prior to mobilization.

2. The Contractor shall submit its NPDES dewatering permit to the Engineer prior to mobilization.

3. The Contractor shall submit all NPDES discharge compliance laboratory testing results a minimum of two days after receipt of these results from its laboratory.

4. The Contractor shall maintain a daily record of the static water level, pumping water level, discharge rate, time, sand content, electrical conductivity, settleable solids, and airline depth to be submitted to the Engineer daily.

C. Measurement and Payment

1. Payment for open-ended airlifting shall be made at the unit price per hour.

2. Payment for bailing shall be made at the unit price per hour.

3. The time required for well redevelopment will be recorded by the hour with 15-minute intervals as the smallest unit of recorded time. The time recorded for payment shall commence when the equipment installed in the well is placed in operation and shall end when redevelopment, airlifting, pumping or bailing are stopped at the direction of the Engineer.

No payment will be made for running equipment into or out of the well.

4. No payment will be made for delays resulting from (1) equipment stuck in the hole; (2) equipment breakdown; (3) arranging major drilling, pumping or testing apparatus; or (4) failure to conduct the operations in a diligent and workmanlike manner by which the desired results could ordinarily be expected.

PART 2 - MATERIALS
A. Sand or Suction Bailer
A sand or suction bailer which is capable of drawing material into the bailer for removal of sediment shall be provided. Skow bailers shall not be used.

B. Airlifting Pipe
See Temporary Facilities and Noise Control.

PART 3 - EXECUTION
A. At any time during the redevelopment, the Contractor may be required to remove accumulated well fill via open-ended airlifting or bailing.

B. If requested by the Engineer, the Contractor shall install the minimum 4-inch diameter eductor pipe to the bottom of the well and remove fill.

C. The Contractor shall maintain a minimum of 50% airline submergence during airlifting.

D. Alternatively, the Contractor may be requested to remove fill via a suction bailer.

E. Airlifting or Bailing shall continue until there is no measurable amount of fill at the bottom of the well.

END OF SECTION
SECTION 8

CHEMICAL TREATMENT
PART 1 - GENERAL
A. Scope of Work
The Work to be performed under this section includes furnishing, application, and removal of chemical treatment. Chemical treatment shall include acid and chlorine treatments. Application and removal techniques for both acid and chlorine treatments are the same.

B. Submittals

1. Contractor shall provide a submittal addressing the types of chemicals that will be used and the mixing and application techniques anticipated.

2. Contractor shall submit SDS sheets for all chemicals to be used during chemical treatment.

3. The Contractor shall submit its NPDES dewatering permit to the Engineer prior to mobilization.

4. The Contractor shall submit all NPDES discharge compliance laboratory testing results a minimum of two days after receipt of these results from its laboratory.

5. The Contractor shall maintain a daily record of the static water level, pumping water level, discharge rate, time, sand content, electrical conductivity, settleable solids, and airline depth to be submitted to the Engineer daily.

C. Measurement and Payment

1. Payment for application of acid chemical treatment shall be made at the lump sum price.

2. Payment for application of chlorine chemical treatment shall be made at the lump sum price.

3. Payment for double-swab airlifting to remove emplaced chemicals shall be made at the unit price per hour.

4. The time required for redevelopment will be recorded by the hour with 15-minute intervals as the smallest unit of recorded time. The time recorded for payment shall commence when the equipment installed in the well is placed in operation and shall end when redevelopment, airlifting, pumping or bailing are stopped at the direction of the Engineer.

No payment will be made for running equipment into or out of the well.

6. Payment for neutralization of redevelopment chemicals prior to offsite discharge shall be included in the lump sum price for mobilization.

PART 2 - MATERIALS
A. Acid and Bio-Dispersant
The acid used for chemical treatment shall be food grade 75% active phosphoric acid mixed with NW-310 bio-dispersant. Approximately 5,500 gallons of potable water should be used for blending a total of 1,000 gallons of phosphoric acid and 440 gallons of NW-310 (add acid to water and blend, then add biodispersant and blend).

B. Chlorine and Enhancer
The chlorine used for chemical treatment shall be sodium hypochlorite (liquid) with 12% available chlorine. A concentrated liquid non-ionic surface agent (surfactant) formulated to improve wetting and penetration of the disinfectant such as Johnson Screens NW-410 shall be used in conjunction with the chlorine.

The Contractor shall mix a 300 ppm chlorine solution. The Contractor shall mix 100 gallons of sodium hypochlorite, 100 gallons of NW-410, and 28,000 gallons of potable water (3.5 gallons chlorine and 3.5 gallons NW-410 per 1,000 gallons of treatment solution)
C. General
Chemicals shall be delivered in original containers provided by the manufacturer and properly labeled. Containers shall not be leaking or damaged.

D. Double-Swab Tool
The double-swab tool shall have close fitting surge blocks (rubber discs) whose outside diameter is no more than 1/8-inch smaller than the inside diameter of the screen section. The surge blocks for the double-swab tool shall be separated by a 15- to 20-foot perforated section piece of pipe or screen. The cross sectional area of the perforated section of the swab tool shall not exceed the cross sectional area of the drop pipe. Sufficient perforations shall be drilled or cut between the surge blocks to allow a flow of at least 300 gallons per minute.

PART 3 - EXECUTION
A. The Contractor shall install the double-swab tool to the top-most screen interval in preparation for chemical treatment.

B. After installation of the double-swab tool, the Contractor shall mix all chemicals in a tank at the well site prior to use in the well. Mixing shall be accomplished with pumps to circulate and thoroughly blend each chemical with potable water. The tank shall be clean and have markings to determine fluid volume or be of a shape to readily measure and calculate volumes.

C. The chemical shall be pumped through the perforated double-swab tool into a 15- to 20-foot section of screen. After pumping the chemical into the screen interval, the Contractor shall swab the interval for a minimum of 15 minutes to disperse the chemical. The double swab tool will then be moved to the next deeper screen interval and the chemical application shall be repeated. The contractor shall place chemical from top screen to bottom screen, then swab each screen interval for a minimum of 1 hour per 60 feet, from bottom to top screen.

D. After swabbing of acid into the screen interval, the Contractor shall wait a minimum of 12 hours before proceeding with further redevelopment. The acid should then be swabbed again working from top to bottom for an additional 8 hours. After swabbing the chlorine from top to bottom for 1 hour per 60 feet, the Contractor shall wait a minimum of 12 hours before proceeding with further redevelopment. No standby time will be paid during the 12-hour waiting period.

E. Following the 12-hour waiting period after the second chemical treatment (chlorine treatment), the Contractor shall use the specified double-swab airlifting tool installed on drill pipe or eductor pipe to redevelop the entire screen interval. Double-swab airlifting shall proceed from the top of the screen downward or as otherwise directed by the Engineer. Payment for double-swab airlift redevelopment shall be paid at the hourly bid price.

F. The Contractor shall contain discharge fluids above-ground on-site and neutralize the chemicals before discharging to the storm drain. At no time shall chemicals be neutralized within the well.

G. Upon completion of each chemical treatment, The Contract may be required to remove well fill via open-ended airlifting or bailing.

END OF SECTION
SECTION 9

PUMP REDEVELOPMENT
PART 1 - GENERAL
A. Description
This section covers the redevelopment of the well employing pumping and surging. The actual redevelopment procedure may vary depending on actual characteristics of the well.

B. Submittals

3. The Contractor shall submit its NPDES dewatering permit to the Engineer prior to mobilization.

4. The Contractor shall submit all NPDES discharge compliance field and laboratory testing results no more than two days after receipt of laboratory test results (if any).

5. The Contractor shall maintain a daily record of the static water level, pumping water level, discharge rate, time, sand content, electrical conductivity, and settleable solids to be submitted to the Engineer daily.

6. The Contractor shall submit a recent calibration certificate for the flow meter to be used during development and aquifer testing.

C. Related Work Specified Elsewhere
Technical Specifications: Temporary Facilities and Noise Control D. Measurement and Payment

1. Payment for test pump installation and removal shall be made at the lump sum price.

2. Payment for well redevelopment will be made at the unit bid price per hour.

3. The time required for well redevelopment will be recorded by the hour with 15-minute intervals as the smallest unit of recorded time. The time recorded for payment shall commence when the equipment installed in the well is placed in operation and shall end when development, pumping, or bailing are stopped at the direction of the Engineer. No payment will be made for running equipment into or out of the well.

4. No payment will be made for delays resulting from (1) equipment stuck in the borehole; (2) equipment breakdown; (3) arranging drilling, pumping or testing apparatus; or (4) failure to conduct the operations in a diligent and workmanlike manner by which the desired results could ordinarily be expected.

PART 2 – MATERIALS
A. Test Pump
The pump furnished shall be of the deep well turbine type capable of pumping up to 4,000 gpm at an estimated pumping water level of 240 feet. The bowl setting shall be approximately 265 feet unless otherwise specified by the Engineer. The prime mover shall be of variable-speed type and be equipped with sound-deadening devices as appropriate. The pump shall not be equipped with a foot valve which would prevent back spin and interfere with surging. A satisfactory throttling device shall be provided so that the discharge can be reduced to 500 gpm. The pump bowls and column shall be disinfected prior to installation into the well.

B. Discharge Line and Meter
The Contractor shall provide the temporary discharge piping required to convey well testing water to the appropriate discharge location. The discharge line for the well shall include an in-line flow meter with 6-digit, straight reading totalizer, register in units of 100 gallons, together with a rate of flow indicator dial which reads in gallons per minute, and is suitable for a flow range from 500 to 5,000 gpm. The Contractor shall provide the certification of recent (calibration prior to first use on this project) calibration for the totalizer. The discharge line shall also include a tap with a valve for taking water samples not more than 20 feet from the well and a Rossum-type tester for measuring sand content fitted with a ½-gallon/minute flow restrictor (Dole valve). A valving device shall be provided downstream of the flow meter to ensure an adequate water level for meter accuracy at low flow rates. A check valve and air/vac system shall be required on the surface discharge line to minimize water back-flow into the well.

A recently calibrated 5 to 100 psi pressure gauge shall be installed on the discharge side of the pump.

PART 3 – EXECUTION
A. Upon completion of chemical treatment, the Contractor shall commence redevelopment via test pump surging.

B. The quantity of water being pumped from the well at commencement of redevelopment pumping shall be limited and gradually increased as the water clears. From time to time, the pump shall be stopped and the water in the pump column allowed to flow back through the pump bowls and through the screened sections into the aquifers. This procedure, with increasing pumping rates, shall be repeated as redevelopment of the well continues and shall be done in a manner satisfactory to the Owner's Representative.

C. Development of the well shall be continued until the well produces not more than 2 parts per million of sand by volume and the specific capacity is not changing approximately 15 to 20 minutes after surging at a pumping rate of 150% of the design flow.

D. During the redevelopment, the rate of sand production shall be measured by the Contractor using a centrifugal sand separating meter as described in the Journal of American Water Works Association, Volume 46, No. 2, February, 1954. The centrifugal sand-separating meter shall be furnished by the Contractor. The results of all sand production tests shall be expressed in parts per million at 5 minute intervals and shall be provided to the Owner's Representative immediately. The final sand production test shall be conducted in the Owner's Representative's presence.

E. During redevelopment pumping the Contractor shall measure and record pumping parameters including static water levels, pumping water levels, drawdown, totalizer readings, pumping rates, specific capacity, and sand production (as described above).

F. At all times during redevelopment pumping, the Contractor shall measure and record the filter pack level in the gravel feed tube and run fresh potable water continuously down the gravel feed tube and add gravel as needed.

G. If, during redevelopment operations, there is any indication of settlement of the gravel envelope, more gravel shall be added as needed and the quantity recorded and reported to Owner's Representative.

H. After completion of redevelopment pumping, the Contractor shall measure the depth of the well to determine the amount of sediment deposited in the bottom and complete fill removal if requested by the Engineer.

END OF SECTION
SECTION 10

AQUIFER TESTS
PART 1 - GENERAL
A. Description
This section covers the aquifer pumping tests including the step drawdown test with increasing discharge rates, a 12-hour continuous constant rate pumping test, and recovery test.

B. Submittals
The Contractor shall maintain a daily record of the static water level, pumping water level, discharge rate, time, and sand content, to be submitted to the Engineer daily C. Related Work Specified Elsewhere
Technical Specifications: Temporary Facilities and Noise Control Technical Specifications: Pump Redevelopment
D. Measurement and Payment

1. Payment for well testing will be made at the unit bid price per hour.

2. The time required for well redevelopment will be recorded by the hour with 15-minute intervals as the smallest unit of recorded time. The time recorded for payment shall commence when the equipment installed in the well is placed in operation and shall end when development, pumping, or bailing are stopped at the direction of the Engineer. No payment will be made for running equipment into or out of the well.

3. No payment will be made for delays resulting from (1) equipment stuck in the borehole; (2) equipment breakdown; (3) arranging drilling, pumping or testing apparatus; or (4) failure to conduct the operations in a diligent and workmanlike manner by which the desired results could ordinarily be expected.

4. No payment will be made for a 48-hour period following the constant rate test while the water levels are recovering.

PART 2 – MATERIALS

NOT USED
PART 3 – EXECUTION
A. Upon completion of redevelopment via test pump surging, the Contractor shall complete aquifer testing.

B. The well shall be “step” tested for 3 hours each (12 hours total) at rates of ½, ¾, 1 and 1-1/2 times the design capacity of the well. The estimated design capacity for the well is 2,800 gpm. The actual discharge rate will be determined by the Engineer based on the results of the pumping development.

C. Following the step test, a long-term, continuous, constant rate, time-drawdown test shall commence not less than 12 hours and not more than 48 hours after completion of the step drawdown test. The anticipated rate of pumping shall range from 3,000 to 3,500 gpm and shall be determined by the Engineer. The Contractor shall ensure that the pumping rate selected remains constant throughout the test. The test duration shall be approximately 12 hours. When the test is completed and the pump stopped, the Engineer will measure recovery of the water level in the well for a period of approximately 12 hours.

The Contractor shall provide whatever assistance may be required by the Engineer.

D. During the drawdown and recovery tests, the Engineer will record the time and measure the water level in the pumped well on the following schedule.

First 10 minutes - once each minute
10 – 20 minutes - once each 2 minutes
20 – 60 minutes - once each 5 minutes
60 – 120 minutes - once each 10 minutes
120 – 720 minutes - once each 30 minutes
E. The Contactor shall provide qualified personnel during testing to operate the pump and change discharge as directed by the Engineer.

F. Discharge rate from the pump shall be controlled by both a gate valve and engine throttle. The discharge shall be controlled and maintained at approximately the desired discharge for each step with an accuracy of at least plus or minus 5 percent.

G. During aquifer testing, the engineer will record the time, pumping level, discharge rate, and rate of sand production.

H. The rate of sand production will be measured by the Engineer using a centrifugal sand separating meter (Rossum Sand Test) as described in the Journal of American Water Works Associate, Volume 46, No. 2, February, 1954. The rate of sand production will be determined at 5 minute intervals.

The results of all sand production tests will be expressed in parts per million at 5 minute intervals. The centrifugal sand separating meter shall be furnished and installed by the Contractor.

I. After completion of aquifer testing, the Contractor shall measure the depth of the well to determine the amount of sediment deposited in the bottom and complete fill removal if requested by the Engineer.

END OF SECTION
SECTION 11

VIDEO CAMERA SURVEY
PART 1 – GENERAL
A. Description
This section describes the performance of a color video camera survey, over the full depth of each well casing. The camera survey shall be run by a firm retained by the Contractor and approved by the Engineer. A video survey may be required at any time during the redevelopment work.

B. Submittals

1. The Contractor shall submit the name and qualifications of the firm retained to perform the video camera survey.

2. Two copies of the DVD and the video log report shall be provided to the Engineer within 48 hours after the survey is complete.

C. Measurement and Payment

1. The payment for the video camera survey shall be made at the unit price per survey.

2. There will be no additional payment for rig time or idle time while the survey is being run.

PART 2 – MATERIALS
A. Camera
The equipment used by the firm for the video survey shall produce a recording with an automatic depth indication.

B. Recording Media
The Contractor shall provide the Engineer with one DVD of the camera survey.

PART 3 – EXECUTION
A. Prior to conducting the camera survey, the Contractor may be required to run fresh water down the well casings to allow for turbidity to clear. The camera survey shall be run for the full depth of each well casing. During the camera survey, the well casing, casing sections, perforations, and casing splices must be clearly visible for the entire length of the well to the satisfaction of the Engineer. The video survey shall be run in the presence of the Engineer.

The depth counter shall be set at zero when the camera is located at the top of each casing. The operator shall lower the camera no faster than 20 feet per minute, and shall log the following:

1. Depth of the static water level

2. Depth of the top and bottom of each screened interval

3. Debris

4. Bottom of the well

5. Any irregular joints

6. Amount of fill in each well
B. The Contractor shall be required to provide the assistance necessary to accomplish the video camera survey.

C. The video camera survey shall become the property of the Engineer at the time the survey is completed.

END OF SECTION
SECTION 12

SWAGE PATCHING
PART 1 – GENERAL
A. Description
This section describes the installation of a swage patch to seal off screen intervals producing sand.

B. Submittals

1. The Contractor shall submit the name and qualifications of the firm retained to perform the swage patching, and estimated lead time to manufacture the patches and to be on site to complete the work.

2. The Contractor shall provide a submittal identifying the steel type, length, and thickness (gage) used to manufacture each swage patch.

C. Measurement and Payment

1. The payment for swage patching shall be made at the unit price per foot of patch installed.

PART 2 – MATERIALS
A. Swage Patch
Mild steel patches of suitable gage to allow complete swaging shall be used and formed to tightly fit the interior diameter of the well. Generally, installation of a double thick corrugated patch is anticipated.

PART 3 – EXECUTION
A. The Contractor shall install 5 to 20 foot long corrugated patches to cover the casing defects identified by the Engineer. Each patch shall be completely swaged to fit tightly inside the well casing. The combined thickness of a double patch shall not exceed ¼ inch and reduce the inner diameter by more than ½ inch. Overlapping patches may be required.

B. The Contractor shall complete a post-swaging video survey to verify the location of the swage patches and that each casing or screen defect is completely covered. If swage patching is not completed at the designed depth as specified by the Engineer, additional patches shall be installed to correct the error. Additional swage patching shall be installed at Contractor’s cost.

END OF SECTION
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City Council - Successor Agency - Housing AuthorityApril 18, 2023

City Council - Successor Agency - Housing Authority
April 18, 2023