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Chemical Waste Disposal

Chemical Waste Disposal. At Purdue. The chemical waste in the US is regulated differently depending on. where it comes from. how much waste is produced. Definition Compatibility Collection Tracking Labeling. Segregation Satellites (!?) Getting rid of it Quickly.

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Chemical Waste Disposal

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  1. Chemical Waste Disposal At Purdue

  2. The chemical waste in the US is regulated differently depending on • where it comes from. • how much waste is produced.

  3. Definition Compatibility Collection Tracking Labeling Segregation Satellites (!?) Getting rid of it Quickly (Not thatkind of satellite!) Topics

  4. Define “Hazardous Waste” • ignitable • corrosive • reactive • toxic • First it has to be waste. • Then it has to be either • hazardous by characteristic • or a “listed” waste material (listed by name or by source) in the regulations

  5. Repeat: 1st -- it has to be waste. • If it’s not a waste, • then it can’t be a hazardous waste! (simplified) Waste = material intended for disposal

  6. Listed waste examples • any waste mixture containing 10% or more xylene, acetone, ethyl acetate, ethylbenzene, ethyl ether, methyl isobutyl ketone, n-butyl alcohol, cyclohexanone, methanol, or any combination…(F003 waste) • unused p-Nitroaniline… (P077 waste)

  7. Characteristic HW is either • Corrosive: pH >12 or pH < 2.5 • Ignitable: 4-part definition which includes most strong oxidizers! • Reactive: 8-part definition focuses on reactivity with air or water producing high energy or toxic gas. • Toxic: leachate contains toxins in EPA D004 – D043 list, handout p. 24.

  8. Evaluate compatibility of wastes BEFORE mixing them together. Where possible, neutralize strong acids/bases, react reactives, reduce oxidizers, oxidize reducing agents…. Chemical Compatibility

  9. Collecting Waste Mixtures Collect in appropriate containers; segregate hazards • Acids typically dissolve metals. • Some solvents dissolve some plastics. • HF and strong caustic etch glass • Don’t mix radioisotope and chemical waste. • Keep all mercury separate.

  10. Chemical “Tracking” On log sheet of every waste container: • All ingredients are to be listed. • EPA-regulated items will be named, waste “characteristics” made clear. • Compatibility questions answered. • Your group waste manager will be able to do the job well.

  11. Toxic characteristic chemicals names must always be noted. • See your handout p. 24

  12. Toxic characteristic chemicals names must be includedon label and pickup request. • Any trace of any of those chemicals must be mentioned in the waste name(the “chemical description” on the pickup form and “contents” on the waste label.) • Other characteristics must also be made obvious in the name – ignitability, corrosivity, reactivity.

  13. Container Labeling • Manufacturer’s label is fine for unwanted “store-bought” chemicals. • For all chemicals & mixtures not in manu-facturers’ container: • Contents - no abbreviations,no symbols, no formulae. • Percentages must add to 100%. • This orange label not required, but widely recognized and used.

  14. Segregation of containers Segregate as regular chemical storage: • Acids separatefrom Bases • Oxidizers notcloseto Organics • Water-Reactives awayfrom water. (And carefully consider waste mixing, also container compatibility!)

  15. Satellite Accumulation Areas (it’s the jargon of the business; know it) Container(s) must be • at/near point of generation of the waste, under “generator’s” control, • marked with words “Hazardous Waste,” and contents identified, • in good condition, • compatible with the waste, • kept closed securely, • handled to avoid rupture or leakage, And….

  16. Satellite Accumulation Areas continued • If more than 55 gallons, or more that 1 qt of “acute” hazardous waste • it must be moved to the permitted waste facility (LMSB) within three (3) days. • Generator (person generating waste) • must demonstrate • “a good faith effort to minimize waste”

  17. Ensuring That Your Waste Leaves Quickly On Pickup Form • Fill out correctly, neatly, legibly. • Questions? Call 40121. • Labels must match pickup request names. In the Lab • Sealed, clean, correct containers. • Area and waste are safe for REM people.

  18. Exercise 1 This one gallon jaris about 25% full of broken thermometers. Write a waste pickup request for it. http://www.purdue.edu/rem/home/forms/pickupfm.htm

  19. Exercise 2 There are three 1 lb bottles of unused sodium thiosulfate. Write a second line on your waste pickup for these.

  20. Exercise 3 Waste container (4 L) log sheet says: Write a third line on your waste pickup for this.

  21. Answer to Ex 1

  22. Answer to Ex 2

  23. Answer to Ex 3

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