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Department of Toxic Substances Control <br />Jared Blumenfeld Meredith Williams, Ph.D. Gavin Newsom <br />Secretary for Director Governor <br />Environmental Protection <br />8800 Cal Center Drive <br />Sacramento, CA 95826 <br />Office of Criminal Investigations <br />Addendum to Sampling Report Dated August 6, 2021 <br />OCI Case # 15242-48 <br />Facility/Site Name: <br />Stockton Propeller, Inc. <br />Facility/Site Address: <br />2478 North Wilcox Road, Stockton, California 95215 <br />EPA ID: <br />None <br />Date Samples Collected: <br />June 3, 2021 <br />Date of Initial Report: <br />August 6, 2021 <br />Date of Addendum: <br />December 7, 2021 <br />Report Completed by: <br />Trevor Anderson <br />I. Summary of Additional Findings <br />On November 18, 2021, OCI received additional sample results not received in time to include in <br />the Stockton Propeller Sampling Report dated August 6, 2021. This Addendum is a summary of <br />the results received. <br />II. Laboratory Results and Waste Determination <br />Sample SP -04B was analyzed using EPA approved SW -846 Test Methods for Evaluating Solid <br />Waste, Physical/Chemical Methods (SM 4500/EPA 9014). Samples SP -0413, SP -0513, and SP - <br />10B were analyzed using the Title 22 Hazardous Waste Fish Bioassay screen testing <br />CDFG/DHS 1988. These additional analytical results are summarized in Table 1 on page 3 and <br />discussed below. The complete analytical laboratory report is included as Attachment 1, <br />Analytical Laboratory Reports. <br />Discussion of Additional Sample Results <br />Sample SP -0413: <br />This sample was tested for Fish Bioassay and cyanide. This sample contains 25.0 mg/L of <br />cyanide. The pH was measure as 2.0 and discussed in the August 6, 2021 report. As such the <br />sample can generate toxic gases, vapors or fumes in a quantity sufficient to present a danger to <br />human health or the environment. Therefore, pursuant to California Code of Regulations, title 22, <br />Page: 1 <br />