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;P Samples and evidence from enforcement actions <br /> 0- Asbestos <br /> 0- Polychlorinated biphenyls (PCBs) <br /> 0, Formation fluids and solids from oil,gas,and geothermal exploration and field development <br /> 0, Geothermal drilling waste generated from the exploration,development,or production of geothermal <br /> energy <br /> i Demolition waste/major renovation waste <br /> 0- Waste generated from emergency response actions <br /> 0- Waste generated from laboratory scale research <br /> 0- Medical waste <br /> 3.3. DESCRIPTION OF MAJOR WASTE STEAMS <br /> As shown on Table 1 in Appendix B,this site location generated approximately 4289 tons of Category B <br /> hazardous waste in the Reporting Year,which includes waste description,applicable California Waste Codes, <br /> and total amount generated. This waste was generated through two processes,both occurring in the boiler <br /> when woody biomass goes through the combustion process and produces bed ash and fly ash.A block flow <br /> diagram for this process can be found in Figure 4 in Appendix A. The following are general descriptions of each <br /> of the major waste streams for this SB 14 Plan: <br /> 3.3.1. Bed Ash (CWC #571) <br /> Bed Ash hazardous waste is produced by the combustion of woody biomass.In 2018,DTE Stockton generated <br /> approximately 6272 tons of hazardous bed ash.DTE Stockton Ash Management Plan dictates the procedure& <br /> frequency of ash analysis.Resulting data is then compared to thresholds for lead,arsenic,and pH.Depending on <br /> the analysis and its'relationship to such thresholds,some bed ash may be reused in the combustion process.The <br /> amount of bed ash generated in the combustion process is heavily influenced by the quality of woody biomass. <br /> Screening biomass for metal impurities such as nails assists with lowering the amount of bed ash that is hauled <br /> off-site as hazardous waste. <br /> 3.3.2. Fly Ash (CWC #571) <br /> Like bed ash,fly ash hazardous waste is produced by the combustion of woody biomass.In 2018,DTE Stockton <br /> generated approximately 1769 tons of hazardous fly ash.DTE Stockton's Ash Management Plan dictates the <br /> procedure&frequency of bed ash analysis.Resulting data is then compared to thresholds for lead,arsenic,and <br /> pH.Depending on the analysis and its'relationship to such thresholds,some fly ash may be considered not <br /> hazardous,contributing to the reduction of hazardous waste from the facility.The amount of bed ash generated <br /> in the combustion process is heavily influenced by the quality of woody biomass,and thus,can be improved by <br /> better screening of the fuel material for size and impurities. <br /> 3.4. ADDITIONAL CONSIDERATIONS <br /> )P, When determining applicability of SB 14,the weight of all aqueous"hazardous"waste streams before <br /> pretreatment and discharge to a sewer must be included in the calculation. <br /> i When determining the applicability of SB 14,hazardous waste streams must be evaluated separately from <br /> extremely hazardous waste streams when comparing these waste streams to their respective applicability <br /> thresholds. If a generator is above the 12,000 kg threshold for hazardous waste,and above the 12 kg <br /> DTE Stockton, LLC I SB 14 Source Reduction Evaluation and Review Trinity <br /> Consultants 3-2 <br />