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Remedial Investigation QAPP <br /> Stockton Army Aviation Support Facility,California <br /> WORKSHEET #14 & 16: PROJECT TASKS AND <br /> SCHEDULE <br /> Worksheets#14& 16 provide the project schedule and detail the general project tasks that are expected to be <br /> completed as part of the RI.The RI program will include tasks as detailed in the following sections: <br /> Section 14.1 - Mobilization. <br /> Section 14.2 - Field Investigation Activities. <br /> Section 14.3 - Laboratory Analysis. <br /> Section 14.4 - Data Management, Review,and Validation. <br /> Section 14.5 - Human Health and Ecological Risk Assessment. <br /> Section 14.6 - Report Preparation. <br /> The RI field activities for Stockton AASF will consist of multiple mobilizations. During Mobilization 1,soil samples <br /> will be collected for PFAS from multiple depth intervals within the vadose zone within suspected potential release <br /> areas. Additionally, VAP will be utilized to determine nature and extent of PFAS in groundwater and to provide <br /> additional information on the geology and hydrogeology of the aquifer underlying the Facility.Shallow monitoring <br /> wells will be installed across the Facility and sampled to confirm VAP results.Soil(or surface water and sediment <br /> if water and ecological habitat are found) samples will be collected from locations along the adjacent Rydberg <br /> Creek. RI Mobilization 2 will be conducted at a yet to be determined date to address data gaps from the RI <br /> Mobilization 1, install additional permanent groundwater monitoring wells,and perform any additional sampling <br /> required for completion of the risk assessment. <br /> This RI QAPP specifically addresses the activities to be performed during the RI Mobilization 1. The specific <br /> details and rationale for the environmental sampling design, in addition to sampling locations and methods, are <br /> presented in Worksheets#17 &#18. Field activities will be completed per the Parsons SOPs in Appendix D.The <br /> schedule for the RI is presented below in Table 14-1. <br /> Table 14-1 RI Schedule <br /> RI QAPP July 2023 July 2024 <br /> Pre-Mobilization (Mobilization 1) May 2024 July 2024 <br /> Mobilization (Mobilization 1) July 2024 July 2024 <br /> Field Work(Mobilization 1) August 2024 September 2024 <br /> Demobilization (Mobilization 1) September 2024 September 2024 <br /> Data Review/Validation (Mobilization 1) October 2024 November 2024 <br /> Data Analysis/Modeling(Mobilization 1) November 2024 December 2024 <br /> Pre-Mobilization (Mobilization 2) TBD TBD <br /> Field Work(Mobilization 2) TBD TBD <br /> Demobilization (Mobilization 2) TBD TBD <br /> Data Review/Validation (Mobilization 2) TBD TBD <br /> PARSONS Worksheet#14&16: Project Tasks and Schedule <br /> Page 60 <br />