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5.4 Subtotaling Similar Waste Streams into one Major Waste Stream For similar process waste streams sharing the same California Waste Code, the wastes might be subtotaled into a single major waste stream when making the 5% calculation. This subsection clarifies CCR 67100.5(h) regarding when and how to subtotal waste streams from similar processes for making a major waste stream calculation. Some individual waste streams might be identified with the same California Waste Code number (CWC) in industrial processes or institutional operations. The SB 14 provision of 22 CCR Section 67100.5 (h) stated below applies only to individual waste streams sharing the same CWC and originating from similar ongoing processes or operations: 22 CCR Section 67100.5 (h) states: (") "Similar industrial processes or institutional activities generating similar wastes (with the same California Waste Codes) shall be considered a single waste stream for purposes of this subsection." rD Accordingly, when a generator is identifying its major waste streams, only those individual waste streams having the same CWC and being from similar processes or —I operations can be grouped and subtotaled as a single major waste stream having that _ rD CWC. However, individual waste streams sharing the same CWC but not originating from similar processes or operations cannot be grouped and subtotaled as a single major waste stream having that CWC. For example, a facility generates CWC 214 spent organic solvents from both its equipment cleaning and from its extraction processes. The facility should not group the spent solvents together as one waste stream under CWC 214. Instead, all the CWC 214 spent solvents from similar cleaning operations should be grouped together; and all the CWC 214 spent solvents from similar extraction procedures should be grouped together. 33