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Revised Workplan-Additional Site Investigation for PFAS BSK Project E20-016-01F Stockton Metropolitan Airport(SCK) March 1, 2023 Stockton, California Page 28 6.7 Report of Findings(First and Second Phases of the Investigation Combined) Once the additional investigation activities are complete, a report will be prepared that will include the following: 1) Documentation of field activities. 2) Description of any deviation from sample collection, preparation and analysis procedures described in this Workplan. 3) Site plan showing pertinent site features. 4) Analytical laboratory results. 5) Data evaluation and presentation of findings. 6) Recommendations concerning further action, if necessary. The Report will bearthe signature,stamp,and contact information for the California-licensed Professional Geologist (PG) and/or Professional Engineer (PE) who directed the investigation and/or prepared the Report. The Report will be submitted in a searchable electronic format and will include a transmittal letter, text, tables, figures, and appendices (laboratory analytical data, copies of drilling logs and field records) in Portable Document Format(PDF) and Electronic Data Deliverable (EDD)format. 7 PROJECT SCHEDULE Permitting, USA marking, and subcontractor coordination will commence upon receipt of the CVRWQCB's approval of this Workplan and SCK's authorization to proceed. Depending on the time required for permit approval and subcontractor availability, it is anticipated that the field activities for the First Phase of investigation will be commenced within approximately 90-180 days of CVRWQCB's approval of this Workplan. The starting date is dependent on the ability to procure FAA Form 7460-1,"Notice of Proposed Construction or Alteration" in a timely manner. The overall schedule for the proposed work will be approximately 6-12 months,which includes, pre-field activities, field activities, and reporting. 8 LIMITATIONS Any statements and conclusions in this Workplan are based upon the scope of work described above. Our work will be performed using a degree of skill consistent with that of competent environmental consulting firms currently performing similar work in the area,and we have attempted to obtain as much information regarding the Site as possible, given what we consider to be a reasonable amount of research. Additional research or receipt of information regarding the property that was not disclosed or available to us during our assessment may result in revision of any conclusions or recommendations.