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PGSF WMVD Storm and Combined Sewer Design Scope of Work 08-25-2023 <br /> <br />34 of 41 <br /> <br />Category 2: Sensitive information <br />Category 2: For official use only / disclosure permissible by law. <br />supplement the standard specifications. <br />• STC will review the specifications for temporary excavation and shoring (prepared by others) <br />to ensure requirements for the launch and retrieval pits are included in that specification. <br />STC will review the dewatering specification (developed by others) to ensure that dewatering <br />requirements for trenchless construction (including shafts) are adequately addressed. STC <br />will not be responsible for the design of the product pipe that will be installed within the <br />casing. STC will not be responsible for casing spacer design for pipelines within the casing. <br />Any additional information for inclusion in referenced specifications will be recommended for <br />consideration by B&C. STC will stamp the trenchless and casing pipe specifications or special <br />provisions developed for the trenchless installation. <br />Everett Responsibilities <br />• Review design documents (within Tasks 410 and 610) <br />Meetings <br />• STC will participate in project meetings and technical design meetings during the <br />development of the design to coordinate trenchless design components with other elements <br />of design. This will include attendance in the B&C kick-off planning meeting, the City of <br />Everett kick-off meeting, monthly project meetings, up to four (2) technical workshops <br />(including workshops for permitting), and two trenchless design coordination meetings. <br />Work Products <br />• Plans showing trenchless alignment and design at the preliminary, 60% and final design <br />levels. Specifications for trenchless methods in format to be supplied by B&C. All plans and <br />specifications will be subject to internal QA/QC review prior to distribution to B&C for review. <br />Draft and final products will be presented to B&C, incorporating any comments from the <br />Draft deliverables into the Final deliverables. A comment tracking and response log will be <br />maintained to document changes to the deliverables based on review comments. <br />Phase 530 – BNSF permit and Supporting TM <br />Objective: One of the primary concerns on this project is acquiring the BNSF permit such that receipt <br />of the permit is not on the critical path. <br />Activities/Approach: <br />Once the most appropriate trenchless technology has been determined for the installation of the <br />new casing beneath the BNSF tracks, STC will perform analyses necessary to facilitate ease in <br />permitting. These tasks will include: <br />• Collaboratively working with B&C pipeline designers and Permitting Sub-Consultants to <br />ensure that the design of the new casing meets the project needs while satisfying all BNSF <br />requirements. This includes review of crossing location and elevation and comparing the <br />design constraints to those of the standard permit. The goal is to provide feedback to avoid <br />the need to obtain a permit variance. <br />• Perform preliminary systematic settlement analysis to demonstrate that the pipeline <br />elevation and method selection will protect the BNSF asset. <br />• Develop criteria for grouting the product pipe within the casing to satisfy BNSF requirements. <br />• Develop layout drawings for the construction pits (jacking and receiving) with details on any