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<br /> NOVEMBER 2021 | 7 <br />Task 3.3 – Utility Investigation and Field Locating <br />LCC will submit records requests to agencies that own utilities within the project area to verify utility location <br />under Task 3.1. <br />Arrow Construction will conduct field locating services of critical utilities along the pipeline alignment, at well <br />sites, and/or at the CTF site, as identified by Carollo after completion of utility records requests. This task <br />includes an allowance of $60,000 for the field locating services. Carollo will submit a detailed utility location <br />plan with cost estimates during design for the City’s approval prior to moving forward with this task. Arrow <br />Construction’s services include marking of the site for USA, traffic control, and obtaining encroachment permits <br />with the City. <br />Task 3.4 – Existing Facility Hazardous Materials Testing <br />Essel Environmental will perform hazardous material testing at existing facilities to be demolished or <br />modified. The hazardous material testing scope of work is included in Attachment D. <br />Task 3.5 – Well 8 Rehabilitation Investigation <br />LSCE will lead the Well 8 Rehabilitation Investigation. The Well 8 Rehabilitation Investigation scope of work is <br />included in Attachment E Task 3.5. <br />Task 3 Deliverables: <br />· Topographic survey of the existing Wells 5 and 6 sites, new Well 9 site, pipeline alignments, and CTF <br />site in PDF and AutoCAD format. <br />· Draft and Final Geotechnical Reports. <br />· Potholing plan and logs. <br />· LSCE will summarize well and field investigation and rehabilitation recommendations in a TM. <br />· Title reports for the existing Well 5 and 6 area. <br />· Soil and groundwater hazardous assessment reports. <br />· Existing facilities hazardous materials testing report. <br />· Refer to Attachments B, C, D and E for additional deliverables. <br />Task 3 Assumptions: <br />· Refer to Attachments B, C, D and E for assumptions. <br />Task 4.0 – PFAS Treatment Media Procurement <br />PFAS treatment media rapid small-scale column tests (RSSCT) conducted during the Basis of Design included <br />multiple types of granular activated carbons (GAC) and strong based anion-ion exchange (SBA-IX) resins. <br />The test results showed that GAC media had lower life-cycle costs and offered more operational flexibility than <br />IX resins. GAC was recommended as the PFAS treatment media for the project. <br />Carollo will test a wider range of GAC media as part of the procurement process and to demonstrate <br />performance to DDW. The task includes pre-purchase of PFAS treatment media separate from the main <br />construction contract to enable vendor selection based on an evaluated low life-cycle cost, supported by <br />vendor media testing.