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384 Waste Management Practices: Municipal, Hazardous, and Industrial

TABLE 11.7
Top 20 Chemicals with the Largest Total Production-Related Waste, 2001

CAS Number Chemical Total Production-Related
Waste Managed (lb)
67-56-1 Methanol 2,331,011,667
108-88-3 Toluene 1,787,944,977
7647-01-0 Hydrochloric acid 1,504,105,058
— Zinc compounds 1,355,504,817
— Copper compounds 1,263,772,355
74-85-1 Ethylene 1,256,806,620
7440-50-8 Copper 1,088,001,030
110-54-3 n-Hexane 970,193,833
— Lead compounds 965,794,108
98-82-8 Cumene 832,570,075
7664-41-7 Ammonia 800,432,076
115-07-1 Propylene 797,566,959
— Nitrate compounds 701,130,070
7664-93-9 Sulfuric acid 583,305,201
107-21-1 Ethylene glycol 565,972,276
107-06-2 1,2-Dichloroethane 561,860,469
7782-50-5 Chlorine 552,091,471
1330-20-7 Xylene (mixed isomers) 479,477,559
— Manganese compounds 477,625,043
7697-37-2 Nitric acid 411,681,261
Subtotal (top 20 chemicals) 19,286,846,925
Total (all chemicals) 26,735,591,638
U.S. EPA, 2001. Data are from Section 8 of Form R.

industries in 2001. Electric utilities reported the fourth largest amount of toxic chemicals in 2001
with 1.56 billion pounds, representing 6% of the total managed. This industry reported the second
largest amount released on- and off-site, with 1.06 billion pounds or 17% of the quantity released
by all industries in 2001.

11.4.2 QUANTITIES OF TRI CHEMICALS IN WASTE BY CHEMICAL
Table 11.7 lists the 20 TRI chemicals managed in production-related waste in 2001 in the largest
quantities. Production-related waste managed from the top 20 TRI chemicals totaled 19.29 billion
pounds, i.e., 72% of all toxic chemicals in production-related waste.
The TRI chemical with the largest quantity released on- and off-site was copper compounds
(1.01 billion pounds), accounting for 16% of all releases on- and off-site in 2001. Copper com-
pounds ranked fifth for total toxic chemicals managed in production-related waste. Zinc compounds
were released on- and off-site in the second largest amounts (982.9 million pounds), and ranked
fourth for total toxic chemicals managed in production-related waste. Hydrochloric acid was
released on- and off-site in the third largest amount (587.6 million pounds) and ranked third for total
toxic chemicals managed in production-related waste and second for on-site treatment.

REFERENCES
Code of Federal Regulations, Vol. 40, Part 261, Identification and Listing of Hazardous Waste, U.S.
Government Printing Office, Washington, DC, 2004.