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Meeting Minutes Stockton Army Aviation Support Facility (AASF) — Site Inspection (SI) Technical Project Planning (TPP) — Meeting 1 and 2 Preliminary Assessments and Site Inspections (PA/Sls) for Perfluorooctanesulfonic Acid (PFOS) and Perfluorooctanoic Acid (PFOA) Impacted Sites Contract No. W912DR-1 2-D-001 4, DO W912DR17F0192 Wednesday, 24 February 2021 1100-1230 * Notes: ARNG-G9 - Army National Guard -G9; CAARNG-California Army National Guard; RWQCB California Regional Water Quality Control Board Ms. Sarah Stinger (AECOM) welcomed participants and reviewed the purpose of the meeting, outlined the agenda, and led a roundtable of introductions for everyone on the virtual Technical Project Planning (TPP) meeting. The meeting was a combination of TPP1 and TPP2 with the purpose of discussing the Army National Guard (ARNG) Per- and Polyfluoroalkyl Substance (PFAS) Preliminary Assessment (PA)/Site Inspection (SI) program, the Stockton Army Aviation Support Facility (AASF) PA findings, and proposed SI approach. Presentation slides and additional data were provided to participants prior to the meeting and are included in Attachment A. Key points that supplement the presentation are summarized below. A safety moment was provided to the participants which covered the safety procedures established in the United States Army Corps of Engineers (USACE) Engineering Manual (EM) 385-1-1. A Programmatic Accident Prevention Plan (APP) and Site Safety and Health Plan (SSHP) have been prepared in accordance with EM 385-1-1. The site-specific SSHP was developed concurrently with the Uniform Federal Policy -Quality Assurance Project Plan (UFP-QAPP) so that as risks related to the proposed sampling approach were identified, mitigation strategies were developed and documented in the SSHP. Additionally, pandemic awareness and safety protocols will be been incorporated into the SSHP to address field work being completed during the Coronavirus Disease 2019 (COVID-19) pandemic. Programmatic Discussion (Slides 5-8): • TPP Meeting Goals • The ARNG PA/SI program is contracted through the Baltimore District of the United States Army Corps of Engineers (USACE) with support from other districts but is managed by the ARNG. • The program follows the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) progress. • The first step in the CERCLA process is the PA, which has been finalized for this facility. The ARNG has performed PAs at approximately 200 facilities across the country to determine the likelihood of release and whether any complete pathways to drinking water receptors exist. The final results of the PAs determine whether a specific site would move to the SI -phase or be recommended for No Further Action, per the CERCLA process. • The primary goal of the SI is to determine the presence or absence of PFAS at the source areas and facility boundary; nature and extent would be determined during a Remedial Investigation (RI). • Participants for TPP1 and TPP2 introduced themselves and included representatives from ARNG, CAARNG, California Water Board, and AECOM. A USACE representative was not available for the ARNG PA/SI, Stockton AASF CA 1 24 February 2021 Participants Name Affiliation* Phone E -Mail Bonnie Packer ARNG G9 703-607-7977 bonnie.m. acker.ctr mail.mil Reuben Sende'as ARNG G9 919-369-4388 reuben.r.sendemas.ctr mail.mil Col CA John Oberg CAARNG 916-854-1480 iohn.c.ober .nf mail.mil Brian Pierskalla CAARNG 916-854-1487 brian.a.pierskalla.nfg@cvr.mil John Murphy RWQCB John. Mur h waterboards.ca. ov Marcus Pierce RWQCB 209-543-1693 Marcus. Pierce waterboards.ca. ov Sarah Stinger AECOM 703-431-1058 sarah.stin er aecom.com Holly Holbrook AECOM 714-689-7215 Holl .Holbrook aecom.com Claire Mitchell AECOM 716-698-5705 claire.mitchell aecom.com Stephanie Tan AECOM 317-379-6792 1 Stephan ie.tian CcDaecom.com * Notes: ARNG-G9 - Army National Guard -G9; CAARNG-California Army National Guard; RWQCB California Regional Water Quality Control Board Ms. Sarah Stinger (AECOM) welcomed participants and reviewed the purpose of the meeting, outlined the agenda, and led a roundtable of introductions for everyone on the virtual Technical Project Planning (TPP) meeting. The meeting was a combination of TPP1 and TPP2 with the purpose of discussing the Army National Guard (ARNG) Per- and Polyfluoroalkyl Substance (PFAS) Preliminary Assessment (PA)/Site Inspection (SI) program, the Stockton Army Aviation Support Facility (AASF) PA findings, and proposed SI approach. Presentation slides and additional data were provided to participants prior to the meeting and are included in Attachment A. Key points that supplement the presentation are summarized below. A safety moment was provided to the participants which covered the safety procedures established in the United States Army Corps of Engineers (USACE) Engineering Manual (EM) 385-1-1. A Programmatic Accident Prevention Plan (APP) and Site Safety and Health Plan (SSHP) have been prepared in accordance with EM 385-1-1. The site-specific SSHP was developed concurrently with the Uniform Federal Policy -Quality Assurance Project Plan (UFP-QAPP) so that as risks related to the proposed sampling approach were identified, mitigation strategies were developed and documented in the SSHP. Additionally, pandemic awareness and safety protocols will be been incorporated into the SSHP to address field work being completed during the Coronavirus Disease 2019 (COVID-19) pandemic. Programmatic Discussion (Slides 5-8): • TPP Meeting Goals • The ARNG PA/SI program is contracted through the Baltimore District of the United States Army Corps of Engineers (USACE) with support from other districts but is managed by the ARNG. • The program follows the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) progress. • The first step in the CERCLA process is the PA, which has been finalized for this facility. The ARNG has performed PAs at approximately 200 facilities across the country to determine the likelihood of release and whether any complete pathways to drinking water receptors exist. The final results of the PAs determine whether a specific site would move to the SI -phase or be recommended for No Further Action, per the CERCLA process. • The primary goal of the SI is to determine the presence or absence of PFAS at the source areas and facility boundary; nature and extent would be determined during a Remedial Investigation (RI). • Participants for TPP1 and TPP2 introduced themselves and included representatives from ARNG, CAARNG, California Water Board, and AECOM. A USACE representative was not available for the ARNG PA/SI, Stockton AASF CA 1 24 February 2021