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3.2 Characteristic of Corrosivity <br />Per CFR 40, Part 20, Subpart C, Section 261.22, the Characteris- <br />tic of corrosivity is defined as follows: <br />261.11 Characteristic of corr.o!-: vitt' <br />(a) A solid waste exhibits the charac- <br />teristic of corrosivity if a repre- <br />sentative sample of the waste has either <br />of the following properties: <br />(1) It `is aqueous and has a pli less than <br />or equal to 2 or greater than or equal <br />to 12:5, as determined by a 1,11 meter <br />using either an EPA test method or an <br />equivalent test method approved by the <br />Administrator under the procedures set <br />forth in 260.20 and 260.21. The EPA <br />test method for pH is specified as <br />Method 5.2 in "Test Methods for the <br />Evaluation of Solid Waste, Physi- <br />cal/Chemical Methods" (incorporated by <br />reference,.see 260.11). <br />.(2) It is a liquid and corrodes steel <br />(SAE 1020) at a rate greater than 6.35 <br />mm (0:250 inch) per year at-. a test <br />temperature of 55oC (1.300F) as deter- <br />mined by the test method specified in <br />NACE (National Association of Corrosion <br />Engineers) Standard TM -01-69 as stan- <br />dardized in "Test Methods for the <br />Evaluation of Solid Waste, Physi- <br />cal/Chemical Methods01 (incorporated by <br />reference, see 260.11) or an equivalent <br />test method approved by the Administra- <br />tor under the procedures set forth in <br />260.20 and 260.21. <br />(b) A solid waste that exhibits the <br />characteristic of corrosivity, but is <br />not listed as a hazardous waste in <br />Subpart D, has the EPA Hazardous Waste <br />Number of D002. <br />[45 FR 33119, May 19, 1980, as amended <br />at 46 FR 35247, July 7, 1981] <br />For the Cal Cedar fly ash, the corrosivity, as measured by pH, <br />was determined to be 10.0 and 10.4 for samples Bin 1 and Bin 2 <br />