PERI: Toxic 100 Index

HollyFrontier Corp.

Rank in Toxic 100: 96
Rank among all TRI companies: 320
Air releases 2010 (lbs): 1,163,747
Incineration transfers 2010 (lbs): 27,883
Total Air and Incineration Toxic Score 2010: 97,558
Percentage of national total 2010 toxic air and incineration score: 0.025%
EJ: Poor Share: 19.1%
EJ: Minority Share: 32.1%

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Chemical	Air releases (lbs)	Incineration transfers (lbs)	Toxic Score (quantity x exposure x toxicity x population)	Percent of total company score	EJ: Poor Share	EJ: Minority Share	Rv
Zinc and zinc compounds	9,408	0	59	0.06%	39.4%	51.9%
Styrene	548	0	0	0.00%	30.2%	45.4%
Biphenyl	459	0	0	0.00%	29.7%	45.1%
Anthracene	7	0	0	0.00%	28.7%	46.2%
Tetrachloroethylene (Perchloroethylene)	291	0	145	0.15%	28.6%	45.7%
Carbonyl sulfide	2,910	0	23	0.02%	28.5%	45.2%
Carbon disulfide	770	0	0	0.00%	28.0%	44.4%
Hydrochloric acid	25,058	0	49	0.05%	27.9%	46.7%
Ethylbenzene	43,103	154	814	0.83%	26.4%	42.2%
Cumene	4,522	1	0	0.00%	26.2%	49.0%
Sulfuric acid	241,895	0	12,609	12.92%	26.2%	47.5%
Polycyclic aromatic compounds	106	0	2,749	2.82%	24.3%	42.0%
Ammonia	108,353	0	104	0.11%	22.5%	35.4%
Mercury and mercury compounds	55	0	15	0.01%	22.3%	38.4%
Toluene	154,186	441	2	0.00%	19.7%	32.4%
Xylene (mixed isomers)	97,559	2,828	74	0.08%	19.0%	34.1%
Lead and lead compounds	65	0	40	0.04%	19.0%	31.7%
Benzene	87,993	266	75,228	77.11%	18.3%	30.0%
Naphthalene	5,311	10,994	1,652	1.69%	16.2%	29.1%
Cyclohexane	43,288	42	1	0.00%	15.4%	29.1%
n-Hexane	172,074	15	20	0.02%	15.4%	28.5%
Cresol (mixed isomers)	530	13,000	0	0.00%	12.8%	13.5%
1,2,4-Trimethylbenzene	18,094	73	199	0.20%	12.7%	29.8%
Ethylene	46,568	0	1	0.00%	12.5%	22.8%
Trichloroethylene	140	0	48	0.05%	12.0%	11.3%
Propylene (Propene)	94,611	0	4	0.00%	10.9%	20.9%
Methanol	3,373	0	0	0.00%	10.4%	16.9%
Hydrogen fluoride	915	0	17	0.02%	9.2%	20.8%
1,3-Butadiene	516	0	3,707	3.80%	6.6%	14.0%
Phenanthrene	355	0	0	0.00%	0.0%	0.0%
Phenol	680	0	0	0.00%	0.0%	0.0%
Benzo(g,h,i)perylene	3	0	0	0.00%	0.0%	0.0%
Molybdenum trioxide	0	69	0	0.00%	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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