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2 2 'Hazardous Wastes' <br /> A waste may be classified as 'hazardous' by any of several means. Article 9,§66680(d) and <br /> 0' )' ),of the hazardous waste management regulatons' provides lists of wastes and waste <br /> nstituents {List of Common Names and List of Chemical Names). Any waste listed in the <br /> List of Common Names or any waste containing constituents listed in the List of Chemical <br /> Names is presumed to be a 'hazardous waste' unless shown to be otherwise by means of - <br /> criteria contained in Article 11. ['Restricted hazardous wastes' and 'extremely hazardous <br /> wastes' are subsets of 'hazardous wastes' under these regulations. `Extremely hazardous <br /> wastes' are not discussed further in this report.] <br /> Article 11 of the hazardous waste management regulations,beginning with §66693, <br /> establishes criteria in four areas--toxicity, ignitability,reactivity, and corrosivity. A waste <br /> meeting any of these criteria is considered to be 'hazardous"by DHS The toxicity criteria, <br /> summarized in Figure 4,include acute oral, dermal,inhalation and fish toxicity, <br /> carcinogenicity, and compound specific toxicity. The carcinogenicity criteria include a list <br /> of compounds for which the combined concentration in a waste exceeding 0 001 percent by <br /> weight (10 mg/kg or 10 ppm) makes the waste hazardous'. These compounds are: <br /> 2-Acetylaminofluorene (2-AAF) 4-amethylaminoazobenzene(DAB) <br /> Acrylonitrile Ethyleneirrune (EL) <br /> 4-Aminodiphenyl a-Naphthylamine(1-NA) <br /> Benzidine and its salts b-Naphthylamine (2-NA) <br /> bis (Chloromethyl) ether (BCME) 4-Nitrobiphenyl (4-NBP) <br /> Methyl chloromethyl ether N Nitrosodimethylamine (DMN) <br /> 1,2 Dibromo-3-chloropropane(DBCP) b-Propiolactone (BPL) <br /> 3,3'-Dichlorobenzidine and its salts (DCB) Vinyl Chloride(VCM) <br /> The regulations include other carcinogenicity criteria in addition to this list of compounds. <br /> The compound-specific toxicity criteria include concentration limits for several "persistent <br /> and bioaccumulative" toxic substances The limits are called Soluble Threshold Limit <br /> Concentrations (STLCs) and Total Threshold Limit Concentrations (TTLCs) shown in <br /> Figures 5 and 6. A solid waste is 'hazardous' if any of the extractable concentrations of its <br /> toxic constituents (in mg/l of extract) equals or exceeds the STLC and/or any of the total <br /> concentrations of its toxic constituents (in mg/kg of waste) equals or exceeds the TTLC. <br /> The Waste Extraction Test (WET) is used to determine extractable concentrations of toxic <br /> constituents in a waste,expressed in milligrams per liter (mg/1) of extract. The full WET Y <br /> procedure (§66700 of Title 22,CCR) may be found in Appendix I to this report. A liquid <br /> waste is hazardous if any of the total concentrations of its toxic constituents (in mg/i of -- <br /> waste)exceeds the STLC. All concentrations are expressed on a wet-weight basis (as the <br /> waste is to be discharged). <br /> Once a waste is classified as 'hazardous' under the Title 22 regulations,it must be managed . <br />_ aa 'hazardous waste' —discharged only to a Class I waste management unit--unless <br /> waste generator or handler is able to demonstrate to DHS that Class I containment is not <br /> necessary to protect public health from the particular waste. The Alternative Technology <br /> Page 12 Designated Level Methodology <br /> r <br />