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Stockton Propeller Sampling and Analysis Plan found 21 violations (2 Class I, 19 Class II, 2 repeat, & 1 corrected on site).They also were made aware that SPI was disposing of some hazardous waste into their septic tank which led to a Sewage Disposal Notice to Abate on May 27, 2021. SJCEHD generated a Small Quantity Hazardous Waste Generator Compliance Review Report on August 9, 2021 and performed a Sewage Disposal Notice to Abate: Reinspection on August 18, 2021 and found the facility to be compliant. 2.3.2 City of Stockton On January 6, 2021, City of Stockton, Bryan Toledo inspected the SPI facility and found that potentially hazardous industrial waste was being washed down a sink in the Etching Room of the SPI Main Building to their septic tank.Toledo notified SJCEHD of his findings for further investigation. 2.3.3 California Department of Toxic Substances Control On June 3, 2021,the California Department of Toxic Substances Control (DTSC) Office of Criminal Investigations inspected the SPI facility and released a report with their findings on August 6, 2021 with an Addendum on December 7, 2021.The report details the sampling activities and photos taken during the inspection. DTSC collected 13 samples from 10 various containers and machines within the Etching Room (SPI Main Building) and Warehouse at the facility, which were delivered to DTSC's Environmental Chemistry Laboratory.Ten (10) samples were analyzed for total metals [total threshold limit concentration (TTLC)], Waste Extraction Test (WET) soluble threshold limit concentration (STLC),toxicity characteristic leaching procedure (TCLP) Metals, and pH. One (1) sample was analyzed for cyanide, two (2) samples were analyzed for chromium VI, and three (3) samples were assessed using a Fish Bioassay. Refer to Table 2. Results, except cyanide and Fish Bioassay,were presented in the August 2021 report, and results for cyanide and Fish Bioassay were presented in the December 2021 Addendum. Highlighted cells in Table 2. Blankinship&Associates, Inc. Page 8 of 20 September 23, 2022 NES, Inc.