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Commonly Used Isotopes & Maximum Allowable Concentration

Use the following tables as a guide for mixed waste minimization:

This is only a list of the most commonly used chemicals if you have any questions call 625-1682 or 624-1604.

Table - Prohibited Chemical Use List


Chemical Name Formula MAC
Acetone C3H6O 0%
Acetonitrile CH3CN 0%
Benzene C6H6 0%
Chloroform CHCl3 0%
Dichloromethane CH2Cl2 0%
Ether C4H10O 0%
Ethyl Acetate C4H8O2 0%
Heptane C7H16 0%
Hexane C6H14 0%
HPLC Varies 0%
Isopropanol C3H8O 0%
Mercury Hg 0%
Pesticides Varies 0%
Xylene C8H14 0%

Generation of a mixed waste with the chemicals listed above Significantly increases the cost of mixed waste disposal. If you cannot avoid use of the chemicals in the table listed above you must contact the RPD and discuss procedures for minimization of mixed waste.

Table III - Maximum Allowable Concentration


Chemical Name Formula MAC
Acids and Bases N/A pH 7-10
Bleach OclNa pH 7-10
Ethanol (EtOH) C2H5OH 5%
Formaldehyde CH2O 4%
Formalin CH2O 4%
Formamide CH3NO 100%
Methanol (MeOH) CH3OH 10%
Phenol C6H6O 50%
Polychlorinated biphenyls PCB'S <50ppm
Sodium Azide N3Na 1%

If you cannot avoid use of the chemicals that are listed in the tables above and have concentrations that are greater than the MAC you must contact the RPD and discuss procedures for minimization of mixed waste

Important: If your chemical concentration is less than the MAC you are required to fill out a Hazardous Waste Manifest.

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