PERI: Toxic 100 Index

Exelon Corp.

Rank in Toxic 100: 75
Rank among all TRI companies: 217
Air releases 2010 (lbs): 2,395,803
Incineration transfers 2010 (lbs): 40
Total Air and Incineration Toxic Score 2010: 193,356
Percentage of national total 2010 toxic air and incineration score: 0.050%
EJ: Poor Share: 14.3%
EJ: Minority Share: 42.7%

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Chemical	Air releases (lbs)	Incineration transfers (lbs)	Toxicity Weight	Toxic Score (quantity x exposure x toxicity x population)	Percent of total company score	EJ: Poor Share	EJ: Near Poor Share	EJ: Minority Share	EJ: Black Share	EJ: Hispanic Share	Rv
Arsenic and arsenic compounds	407	0	15,000,000	103,568	53.56%	15.1%	30.5%	42.4%	27.1%	8.7%
Chromium and chromium compounds	390	0	43,000,000	43,843	22.67%	14.2%	29.2%	42.7%	27.8%	8.3%
Sulfuric acid	441,166	0	3,500	15,843	8.19%	13.2%	27.9%	44.8%	29.8%	8.2%
Nickel and nickel compounds	1,174	0	930,000	14,772	7.64%	14.5%	29.7%	43.5%	28.2%	8.6%
Cobalt and cobalt compounds	58	0	17,000,000	10,849	5.61%	10.5%	24.2%	42.0%	29.2%	6.3%
Hydrochloric acid	1,683,214	0	180	2,273	1.18%	11.1%	25.1%	46.8%	32.7%	7.2%
Manganese and manganese compounds	843	0	70,000	869	0.45%	13.3%	28.2%	40.7%	27.2%	7.4%
Polycyclic aromatic compounds	55	0	1,300,000	667	0.35%	11.1%	25.1%	36.4%	22.2%	7.5%
Hydrogen fluoride	159,146	0	250	298	0.15%	11.2%	25.3%	46.2%	32.7%	6.8%
Ammonia	102,065	40	35	116	0.06%	12.2%	26.2%	35.6%	17.2%	10.1%
Lead and lead compounds	367	0	18,000	112	0.06%	13.3%	27.8%	36.3%	17.4%	10.8%	**
Barium and barium compounds	870	0	7,000	104	0.05%	9.4%	23.1%	34.3%	25.2%	4.4%
Mercury and mercury compounds	175	0	12,000	26	0.01%	13.9%	28.7%	42.9%	27.9%	8.3%
Naphthalene	27	0	12,000	6	0.00%	14.1%	29.1%	40.7%	24.7%	9.1%
Selenium and selenium compounds	4,202	0	180	4	0.00%	10.7%	24.6%	46.5%	32.8%	6.9%
Copper and copper compounds	183	0	1,500	3	0.00%	10.5%	24.1%	41.5%	28.9%	6.2%
Zinc and zinc compounds	972	0	100	1	0.00%	13.0%	27.7%	44.3%	29.6%	8.0%
Vanadium and vanadium compounds	490	0	140	1	0.00%	12.9%	27.5%	41.8%	27.8%	7.5%
Benzo(g,h,i)perylene	1	0	0	0	0.00%	0.0%	0.0%	0.0%	0.0%	0.0%

For explanations of most columns above, including the EJ Shares, see the technical notes.

For the Rv (revisions) column,
* indicates that the record contains one or more chemicals at facilities whose TRI air releases or incineration transfers for 2010 were revised downwards since 2010, and whose hazard and score have been adjusted accordingly.
** indicates one or more chemicals at facilities whose quantities were revised upwards, or both upwards and downwards. Chemicals revised upwards had their pounds adjusted, but not their score.
*** indicates that the RSEI microdata do not match the public RSEI data.

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