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Cleanup in Vulnerable Communities'Initiative Discovery Project Reference:Favorite Cleaners and Enforcement Discovery Investigation Work Plan Project Number:60688620 AECOM Risk Assessor Responsible for data evaluation and development of the HHRA conducted in accordance with DTSC Human and Ecological Risk Office Note 4(DTSC 2022a) and any additional applicable risk management standards. AECOM Health and Safety Responsible for coordinating and ensuring compliance of occupational health and Manager safety standards. Laboratory Representative Responsible for receiving samples at the laboratory facility, applying appropriate analytical methodologies,following QA/QC procedures, and ensuring that the data are accurate. 1.2.2 Contact Information The list below provides the contact information for various representatives involved with this project: Role Name Telephone Number DTSC CVCI D&E Coordinator Julian Grijalva, CA PE (559)578-8174 DTSC Project Manager Stacy Mann (279)895-5016 DTSC Geologist Andrew Leavitt, PG (818)717-6507 DTSC Toxicologist Weiying Jiang, Ph.D (916)255-3665 AECOM Program Manager* Edmund Tarter, CAPE (916)216-6125 AECOM Project Manager Wanda Farmer (843)209-1534 AECOM Quality Assurance Manager Stacy Louie (916)414-5810 AECOM Risk Assessor Catherine Schwach (415)816-2778 AECOM Health and Safety Manager Shannon Couch (510)277-5369 Laboratory Representative Monica Tran (916)605-3408 Laboratory Quality Assurance Officer Christopher Davis (650)219-6399 *The work performed pursuant to this CVCI D&E Discovery Investigation Work Plan will be under the direction and supervision of the consultant's program manager who is a qualified California-registered Professional Engineer(PE)and/or Professional Geologist(PG)in compliance with the requirements of the Professional Engineers Act, Business and Professions Code Sections 6700-6899 and 7838, and the Geologist and Geophysicists Act, Business and Professions Code Sections 7800-7887. 1.3 Work Plan Organization This Work Plan is organized as follows. • Section 1 presents an introduction and the overall objectives of the Discovery Investigation process. • Section 2 presents a discussion of the Subject Property background research conducted in the preparation of the Work Plan. • The Sampling and Analysis Plan, included as Section 3, presents a discussion of planned field data collection activities and laboratory analytical techniques that will be used to evaluate environmental conditions at the Subject Property. • The QAPP, presented in Section 4, describes the QA/QC measures to be used during project execution to provide an appropriate level of assurance that the data collected during the CVCI Discovery Investigation meet the project DQOs to support risk-based decisions regarding the Subject Property acceptability. • The procedure for dealing with potential field variances is described in Section 5. • Field health and safety procedures are discussed in Section 6. • The planned screening risk evaluations are described in Section 7. Prepared for: California Department of Toxic Substances Control AECOM 3