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Thatcher Company of California, Stockton The Samples exceed the Soluble Threshold Limit Concentration (STLC) or Total threshold Limit Concentration (TTLC) and thus exhibit the Characteristic of Toxicity (non-RCRA). Pursuant to California Code of Regulations (Cal. Code Regs.), title 22, § 66261.24. Characteristic of Toxicity. (a) A waste exhibits the characteristic of toxicity if representative samples of the waste have any of the following properties: (2) it contains a substance listed in subsection (a)(2)(A) or (a)(2)(B) of this section at a concentration in milligrams per liter of waste extract, as determined using the Waste Extraction Test (WET)described in Appendix II of this chapter, which equals or exceeds its listed soluble limit threshold concentration (STLC) or at a concentration in milligrams per kilogram in the waste which equals or exceeds its listed total threshold limit concentration (TTLC). (6) it has an acute aquatic 96-hour LC50 less than 500 milligrams per liter when measured in soft water (total hardness 40 to 48 milligrams per liter of calcium carbonate) with fathead minnows (Pimephales promelas), rainbow trout (Salmo gairdnen) or golden shiners(Notemigonus crysoleucas) according to procedures described in Part 800 of the "Standard Methods for the Examination of Water and Wastewater(16th Edition)," American Public Health Association, 1985 and "Static Acute Bioassay Procedures for Hazardous Waste Samples," California Department of Fish and Game, Water Pollution Control Laboratory, revised November 1988 (incorporated by reference, see section 66260.11), or by other test methods or test fish approved by the Department, using test samples prepared or meeting the conditions for testing as prescribed in subdivisions (c) and (d) of Appendix II of this chapter, and solubilized, suspended, dispersed or emulsified by the cited procedures or by other methods approved by the Department; (8) it has been shown through experience and testing to pose a hazard to human health or environment because of its carcinogenicity, acute toxicity, chronic toxicity, bioaccumulative properties or persistence in the environment. Characteristic of Corrosivity. (a) A waste exhibits the characteristic of corrosivity if representative samples of the waste have any of the following properties: (1) It is aqueous and has a pH less than or equal to 2 or greater than or equal to 12.5, as determined by a pH meter using either the EPA test method for pH or an equivalent test method approved by the Department. (b) A waste that exhibits the characteristic of corrosivity specified in subsection (a)(1) or(a)(2) of this section has the EPA Hazardous Waste Number of D002. 2of4 RF\/•1N1Q/9MR