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Stockton Propeller, Inc., OCI Case #15242 <br />Date Samples Collected: June 3, 2021 <br />Mike Belmont <br />Service Manager <br />Stockton Propeller, Inc. <br />2478 North Wilcox Road <br />Stockton, California 95215 <br />Phone: (209) 601-0363 <br />Email: mike0stocktonpropeller.com <br />Jason Boone <br />EHS Manager <br />VRC Metal Systems <br />600 North Ellsworth Road <br />Box Elder, South Dakota, 57719 <br />Phone: (605) 716-0061 ext. 3311 <br />Jason. booneCcDvrcmetalsystem. com <br />Consent given by: Mike Belmont the Service Manager and Jason Boone the EHS Manager. <br />III. Sampling Activities <br />Summary: <br />DTSC staff collected a total of 13 samples from the Site. Samples were delivered to DTSC's <br />Environmental Chemistry Lab (ECL) and were analyzed for total metals [total threshold limit <br />concentration (TTLC)], WET [soluble threshold limit concentration (STLC)], toxicity characteristic <br />leaching procedure (TCLP) Metals, pH, chromium VI, cyanides, and Fish Bioassay. Sample <br />Locations are identified on the Site and Sample Map (Attachment 1: Site and Sample Maps). <br />All photographs taken during this sampling event are summarized in the Photographic Log <br />(Attachment 2: Photographic Log). The original photos are saved in electronic format on the <br />DTSC drives. A disc, thumb drive, OneDrive or drop box can be used to transfer the original <br />photographs to anyone needing a copy. Duplicate samples were offered to M. Belmont and J. <br />Boone but were turned down as they would have their own samples taken at a later time. <br />Sampling Teams) and Roles: <br />Trevor Anderson — Lead, Notetaker, & Assistant Sampler <br />Bonny Lew— Primary Lead Sampler <br />Faith Friend — Assistant Sampler <br />Lee Myers — Safety Monitoring / Assistant Sampler / Rescue <br />Marco Salas— Photography / Rescue <br />Sampling Equipment, and OA Procedures: <br />Sample containers used: New 32 -ounce certified clean clear glass jars, new16-ounce certified <br />clean amber glass jars, and new plastic bags. <br />Sample devices used: New disposable glass COLIWASA, new disposable 50 ml Bellows Sample <br />Bulbs, new disposable plastic scoop, and gloved hand. <br />Page:3 <br />