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a. Label as "UNKNOWN." Waste containers will be classified as "unknown" <br /> whenever there is a reasonable doubt regarding the contents due to illegible, missing, <br /> or apparently incorrect labels. The procedure is to fingerprint these small quantities <br /> and determine their characteristics so that a hazard class and shipping description may <br /> be designated. The results of the fingerprinting tests are recorded directly on the <br /> container in question. <br /> b. Initial Observations. The first step in screening material is to observe distinguishing <br /> properties such as physical state, color and other characteristics. <br /> c. Crystals. If crystals are observed in or around the lid of any unidentified material, <br /> then a peroxide screen will be performed. If the material tests positive for peroxide, <br /> this container will not be opened to prevent imminent danger and the PM will decide <br /> the best course of action to take for proper packaging and disposal. If the material <br /> tests negative, then the HazCat process will continue. <br /> d. Fingerprinting Testing. Once a container has been opened a small representative <br /> sample is extracted and the testing procedure shown below shall be performed. <br /> e. Recording of Data. The recording of data on the waste container with an indelible <br /> marker will be done concurrently with the actual testing. All waste products <br /> produced from the testing procedures will be consolidated into a drum for proper <br /> disposal. <br /> Test 1- Corrosivity (40 DFR 261.22 {I}) <br /> Twenty ml. sample (or 20 gins. if waste is solid) will be added to 5 mis of <br /> water. A pH indicator will be used to determine the pH of the waste sample. <br /> • If the pH of the solution is less than or equal to 2,the chemical will be <br /> classified as an acid. <br /> • If the pH of the solution is greater than or equal to 12, the chemical <br /> will be classified as an alkaline substance. <br /> Test 2 - Oxidizer Screen <br /> Potassium iodide test strips will be used to test all liquid and solid compounds <br /> for oxidizer characteristics or oxidizer information upon solvation. After <br /> acidifying the test strip (adding 1 drop of hydrochloric acid), any chemical <br /> causing a change in color of the strip from white to blue/black will be classed <br /> as an oxidizer and packaged accordingly. <br /> Test 3 -Water Reactivity (40 CFR 261.23 {2} {3} {41) <br /> A waste will be considered water reactive if a representative sample of the <br /> waste has any of the following properties when mixed with water: <br /> • Generates any gas <br /> • Generates excess heat <br /> Page 13 of 41 <br />