Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 1 Pounds of Total OSHA Carcinogen Emissions per 1000 Barrels per Calendar Day 2005 OSHA carcinogens = 188 compounds known or likely to cause cancer

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 2 Percent of Total US Refining Capacity and Total US OSHA Carcinogen Emissions Related to Petroleum Refining (SIC 29) 2005

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 3 Shell Pounds of OSHA Carcinogen Emissions per 1000 Barrels per Calendar Day 2005 (by State)

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 4

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 5 Valero Pounds of OSHA Carcinogen Emissions per 1000 Barrels per Calendar Day 2005 (by State)

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 6

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 7 ExxonMobil Pounds of OSHA Carcinogen Emissions per 1000 Barrels per Calendar Day 2005 (by State)

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 8

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 9 ConocoPhillips Pounds OSHA Carcinogen Emissions per 1000 Barrels per Calendar Day 2005 (by State)

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 10

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 11 Citgo OSHA Carcinogen Emissions per 1000 Barrels per Calendar Day 2005 (by State)

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 12

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 13 Pounds of Total Benzene Emissions per 1000 Barrels per Calendar Day 2005

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 14 Percent of Total US Refining Capacity and Total US Benzene Emissions Related to Petroleum Refining (SIC 29) 2005

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA Benzene Emissions (lbs) per 1000 Barrels Refined per Day by Firm and State

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 16

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 17

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA Largest US Benzene Emitters (SIC 29) Petroleum (2005)

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 19

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA Largest US Benzene Emitters (SIC 28) Chemical (2005)

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA. 21

Source: Energy Information Administration (EIA), Form EIA-820, “Annual Refinery Report.” 2005 and Environmental Protection Agency (EPA), Toxics Release Inventory (TRI), TRI-Explorer SIC 29 Benzene EPA, TRI, TRI-Explorer SIC 29 OSHA Carcinogens, 2004 and EPA, TRI, TRI-Explorer SIC 28 Benzene, TRI OSHA Carcinogens are defined as carcinogenic or probably carcinogenic by the IARC; a known or reasonably anticipated carcinogen by the NTP; or part of 29 CFR part 1910 Subpart Z under OSHA Largest US Benzene Emitters (SIC 28) Chemical (2005)