605 THIRD STREET
ENCINITAS, CALIFORNIA 92024
T 760.942.5147 F 760.632.0164
September 21, 2022
Masoud Sepahi, PE
City Engineer
City of Placentia
401 E. Chapman Ave
Placentia, CA 92870
Subject: Proposal for Construction Support Services for the Crowther Sewer Project Amendment 2 Dear Mr. Sepahi:
Dudek and the City of Placentia (City) entered into a contract November 2021 for engineering and construction support services for the Crowther Sewer Project. The original contract value was $32,255.
As part of the early stages of the project, a large number of submittals and resubmittals necessitated additional Dudek labor to process these submittals. As a result, Dudek submitted Amendment #1 in April 2022 to request additional budget of $40,000 to support the construction phase.
Since April 2022, a large number of challenges have been supported in the process of moving the project forward.
The following bullet list provides a list of focused efforts conducted by Dudek to support the project moving forward. • Realignment option at State College. OCSan completed construction of the new trunk sewer in State College in 2017. Due to the proximity of existing utilities in the intersection of State College and Orangethorpe Avenue, realignment was considered for this portion of the new sewer. The Contractor conducted approximability 12 potholes in the intersection to support investigating the realignment. Dudek developed two alignment alternatives based on the potholing data. Following the analysis, Dudek confirmed the recommended approach is to construct the new sewer in the original alignment. • In April 2022, Dudek coordinated with Golden State Water and Department of Drinking Water (DDW) to update the DDW variance.
• Weekly Meetings: Dudek has attended most weekly construction meetings from April through August. • Due to work being conducted by City of Fullerton at Orangethrope and State College, the City requested consideration to start the project upstream from the furthest downstream connection point at OCSan.
Dudek investigated options and identified the location along the alignment at the Caltrans crossing as appropriate for beginning the project construction. Potholing information was requested and reviewed to support this recommended alternative starting point. Sheet C-6 of the construction plans was updated to designate the new starting point. This plan also provides direction on connecting the new sewer to the existing sewer at Industrial Way to allow for connecting existing laterals to the new sewer without having 24-hour bypassing.
DUDEK
1 September 2022
Mr. Sepahi
Subject: Crowther Sewer Pipeline - Construction Support Services Proposal Amendment 2 • In June 2022, the contractor confirmed that they did not intend to fuse the HDPE pipe for the project and expected to obtain a change order to address the additional cost for fusion. Dudek had numerous calls with the City and construction manager providing supporting information that fusion of HDPE is required as part of the construction documents. Following a meeting with the Contractor in early July, they confirmed they purposely bid the project without fusion to achieve a lower cost bid and securing the Contract with the City. Dudek assisted with evaluating the option of using a pressure rated coupling as an alternative to fusion. We coordinated directly with Golden State Water and organized a team meeting with GSW to discuss options. Dudek was successful in obtaining acceptance from GSW to allow push -on C900 PVC pipe with internal thrust restraint where the new sewer pipeline has a vertical separation from the existing water pipe of greater than 5 -ft. We were able to have GSW write an acceptance letter and coordinate the resubmittal of the City of Placentia variance letter to DDW, which was approved a week after submittal. • The project started construction in mid-June 2022. The contractor immediately identified an undocumented pipeline and stopped work. Dudek assisted in investigating this pipeline and provided direction for identifying ownership. The pipeline was ultimately found to be abandoned. • Submittals 32 through 41 were processed between April and August 2022. • Dudek has been supporting both the City and Construction management firm by averaging two (2) meetings/calls weekly with the Team for the past 3 months. • In Early August, the Contractor discovered the 6" high pressure gas pipeline was very near the new sewer pipeline alignment. Work was stopped to address this issue. Dudek assisted the team in developing a detail and variance letter to SoCal Gas to allow the new sewer pipeline to be constructed under the existing gas pipeline. SoCal Gas accepted the detail and allowed completion of the work. • In Mid -August, the Contractor submitted CCTV information and requested a change order for reconnection of additional sewer laterals. Dudek reviewed this information and concluded that the "additional" laterals were for the JPI development, and that ultimately, there is one less lateral to connect. • In late August, potholing along Crowther at Melrose identified that an existing 4" gas pipeline followed the alignment of the new sewer pipeline. A series of potholes were completed in early September to allow the redesign of the sewer through the Melrose intersection. This work is currently being evaluated and designed.
The above items have been completed by Dudek between the months of April through August 2022 and have exhausted the full amount of the Amendment request submitted in April 2022. Therefore, we are submitting this Amendment request #2 to continue to support the construction phase of the project.
Anticipated steps to include in this amendment are listed below, with an estimated level of effort:
1. Realignment of Crowther through Melrose Ave. This effort will utilize pothole information to evaluate the feasibility of a new pipeline alignment through Melrose Ave that ideally negotiates above/below existing storm drain, water pipes and utilities. Based on information received over the past 2 days, this realignment is unlikely to be feasible. Therefore Dudek anticipates the project length to be shortened to just before Melrose. Coordination of this design change is ongoing. Level of Effort estimated: $5,000.
DUDEK
2 September 2022
Mr. Sepahi
Subject: Crowther Sewer Pipeline - Construction Support Services Proposal Amendment 2
2. Additional CCTV information was provided to evaluate which laterals to reconnect. Dudek will assist the City in validating lateral reconnections. Level of Effort estimated: $1,500.
3. There are potentially two (2) additional SoCalGas pipeline crossings along Placentia Avenue. Depending on forthcoming pothole information, the proposed sewer pipelines in these areas may require realignment.
Coordination with SoCalGas may also be necessary to address separation requirements and protection of the existing utility. Level of Effort estimated: $2,500.
4. Crowther Avenue east of Melrose: There are numerous existing utilizes along this end reach of the pipeline, including a newly installed underground electrical duct bank. While realignment of the sewer is not anticipated, there is a potential that conflicts may arise in this congested area necessitating Dudek assistance in a solution and direction to the team. Leve of Effort estimated: $2,000
5. Weekly construction meetings: Construction is anticipated to continue for the next five (5) months, with Dudek attendance in weekly construction meetings. Level of Effort estimated: $8,000.
6. Submittal and/or RFIs: Most submittals have been processed. But additional submittals and/or RFI's are likely as the project continues. Level of Effort estimated: $3,000
7. Approximately 10+ construction change orders have been submitted to the City. Dudek is expecting to support the City in evaluating and justifying or refuting the claims or dollar amounts of multiple change orders. Level of Effort estimated: $7,500.
8. Record Drawing Preparation: Preparation of record drawings based on CM and contractor provided redline markups. Level of Effort estimate: $6,000.
9. Contingency Budget: Additional as -need budget to assist the City. Level of Effort estimate: $7,100 (20% of amendment request #2)
DUDEK
3 September 2022
Mr. Sepahi
Subject: Crowther Sewer Pipeline - Construction Support Services Proposal Amendment 2 Summary of above bullet items:
1. Melrose Realignment: $5,000
2. Lateral CCTV/Research: $1,500
3. Gas Line Crossing Coordination: $2,500
4. Crowther East of Melrose: $2,000
5. Weekly Construction Meetings: $8,000
6. Submittal and/or RFIs: $3,000
7. Change Order Support: $7,500
8. Record Drawing Preparation: $6,000
9. Contingency Budget: $7.100
Total: $42,600
Dudek requests consideration of an amendment for additional $42,600 to continue the tasks for construction support services for the Crowther Sewer Project, including meetings, coordination, submittals, RFIs, and production of record drawings. All labor effort is provided on an as -needed basis and billed on a time and materials basis.
Please feel free to call or email me at 760-479-4107/[email protected] if you have questions regarding our proposal. We look forward to continuing to support the project through completion.
Sincerely,
Russ Bergholz, P 'M
Principal
DUDEK
4 September 2022