440 E. Huntington Drive, Suite 425
Arcadia, CA 91006
PH 626.449-0664
www.geosyntec.com
17 March 2023
Ms. Kelly Kacmar
Environmental Services Project Technician
City of Santa Clarita
23920 Valencia Blvd., Suite 200
Santa Clarita, CA 91355-2196
Subject: Investigation of Drainage Benefit Assessment Areas (DBAA) 24 Well Repair/Replacement Evaluation – Proposal
Dear Ms. Kacmar,
The City of Santa Clarita (“City”) is interested in an assessment of the current status of the wells included in the DB AA24 with respect to well st ructure condition and possible repairs or replacements. Geosyntec has prepared this proposal to conduct a well condition investigation, recommendations for well rehabilitation, re pairs, or replacements and provide technical specifica tions to support the bidding process for the recommended scopes of work.
Background
In late 2022 and early 2023, Ge osyntec Consultants Inc. (Geosyntec) provided evaluation of groundwater monitoring well s for DBAA 24, including a review of historical construction records, water level, and well depth measurements for each well collected between 1993 and 2022, based on data provided by the City. Each of the wells displayed a significant fluctuation (>10 feet) in measured depth to the bottom of the well casing, with exception of MW-25. Based on that analysis Geosyntec proposed further investigation to understand the integrity of the wells including conducting downhole video surveys in selected wells.
Five wells were recommended based on inco nsistencies in measured well depths. In addition, one to two wells that show less variation in measured well depths were recommended for video surveys to evaluate the intact well construction.
Proposed Scope of Work
Geosyntec’s strategy will be to conduct video logs on fi ve wells – MW-10, MW-11, MW-13, MW-20 and MW-23 – to understand the current st ate of casing structural integrity, as well as two wells expected to be intact – MW-2 and MW-14 – to evaluate typical well construction.
Geosyntec DBAA24 Proposal 202303
Ms. Kelly Kacmar
Proposal – DBAA Well Repair/Replacement Evaluation
March 17, 2023
Tasks in this proposal include the following:
Task 1. Conduct Video Survey
Geosyntec will subcontract Pacific Surveys, LLC, to conduct video surveys within the seven recommended wells. Video surveys would be conducted using a downhole camera with downhole and side-scan color cameras. Th is proposal includes one Geosyntec staff present during the video surveys. At the City’s request, less oversight by Geosyntec can be conducted.
Task 2. Review Results of Video Survey and Recommendations Upon receipt of the video surveys from either Pacific Surveys or City of Santa Clarita, Geosyntec will review the video logs and cons truct a summary table of the key findings for each of the surveyed wells. The video surv eys will be reviewed for 1) integrity of the bottom of the wells and 2) the possible need for redevelopmen t, as indicated by features such as clogging of the well screens or buil dup of material inside the wells that would cover the well screens.
Task 3. Review Pump Records from Flow Services, Inc.
Geosyntec will review the past four events co nducted by Flow Services, Inc. to identify pumps that are no longer functioning and the potential reas ons for the pump status. This task may include a teleconferen ce with Flow Services, Inc. st aff to clarify the status of various sites.
Task 4. Technical Memorandum
Geosyntec will prepare a short technical memorandum summarizing the findings and recommendations to repair or replace each of the evaluated wells and pumps and provide planning-level costs to conduct the recommended work. Geosyntec will convene a meeting to review the informa tion and prioritize the work at the sites so that documents can be prepared for Task 5.
Task 5. Prepare Technical Specifications for Bidding
Based on the meeting conducted in Task 4 w ith City staff, Geosyntec will prepare technical specifications for recommended repairs to the top five sites selected in the meeting conducted as part of Task 4. The deliverable for Task 5 will include:
A description of the work needed at each of the selected sites Details on processes and parts that are required to complete the work Geosyntec DBAA24 Proposal 202303
Ms. Kelly Kacmar
Proposal – DBAA Well Repair/Replacement Evaluation
March 17, 2023
Engineer’s estimate for the work included in the document The technical specifications will be provided to the City for incorporation into standard RFP documents. A draft version of the tech nical specifications will be prepared.
Following review by the City, Geosyntec will address the City’s comments and prepare a final version.
Assumptions:
Task 1 assumes the City will remove the water pumps from the seven selected wells prior to the video surveys.
The City or their subcontractor(s) will evaluate the pump discharge tubing, electrical and other features for potential repairs. Geosyntec will incorporate these recommendations into the technical memorandum described in Task 3. Field investigations to evaluate the status of the well pumps or electrical facilities at the wells are not included in this proposal.
If applicable, the City will be responsib le for reinstalling the well pumps upon completion of each video survey.
Project Schedule
This project is proposed to take approxi mately eight weeks fro m Notice to Proceed (NTP). This schedule assumes the video surveys are conducted within two weeks of the NTP.
Project Budget
The proposed fee for this project is below presented below.
Task Estimated Cost
Task 1: Video Surveys $11,500
Task 2: Review Video Survey Results $5,500
Task 3: Review Pump Records from FSI $2,600
Task 4: Technical Memorandum $7,100
Task 5: Prepare Technical Specifications for Bidding $19,300 Totals $45,800
The project will be billed on time and materi als basis according to the attached rate schedule up to the not-to-exceed budget total.
Geosyntec DBAA24 Proposal 202303
Ms. Kelly Kacmar
Proposal – DBAA Well Repair/Replacement Evaluation
March 17, 2023
If you have any questions regarding this pr oposal, feel free to c ontact David (206-496- 1446) or Tara (323-533-2571) at your convenience. We look forward to continuing to work with you on this project.
Sincerely,
David L. Parkinson, PhD., L.G. (WA) Tara Rolfe, PG, CHG (CA) Principal Senior Hydrogeologist
CONFIDENTIAL
RATE2023
GEOSYNTEC CONSULTANTS
2023 U.S. R ATE SCHEDULE
Staff Professional $154
Senior Staff Professional $178
Professional $198
Project Professional $224
Senior Professional $254
Principal $274
Senior Principal $294
Technician I $ 83
Technician II $ 89
Senior Technician I $ 99
Senior Technician II $106
Site Manager I $116
Site Manager II $128
Construction Manager I $142
Construction Manager II $152
Senior Designer
Designer
$190
$160
Senior Drafter/Senior CADD Operator $ 145
Drafter/CADD Operator/Artist $ 130
Project Administrator $ 85
Clerical $ 65
Direct Expenses Cost plus 12%
Subcontract Services Cost plus 12%
Technology/Communications Fee 3% of Professional Fees
Specialized Computer Applications (per hour) $ 15
Personal Automobile (per mile) Current Gov’t Rate
Photocopies (per page) $ .09
Rates are provided on a confidential basis and are client and project specific.
Unless otherwise agreed, rates will be adjusted annually based on a minimum of the Producer Price Index for Engineering Services.
Rates for field equipment, health and safety equipment, and graphical supplies presented upon request.
Construction management fee presented upon request.