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TABLE B-2
<br />Threshold Volume for Acute Toxicity for Aromatics (Hexane, Octane, Decane) and Acute and
<br />Chronic Toxicity For Benzene'
<br /> Large Spill (1,815 bbl) Threshold Volume for
<br /> Toxicity
<br /> Acute Flow Rate Flow Rate 2.2% (gal) Toxicity Gallon (gal) Acre feet (aj)
<br /> Toxicity (bbl) (gal) Multiplier
<br />Hexane 3.9 1,815 76,230 1,677 256.41 430,015 1.32
<br />Octane 0.37 1,815 76,230 1,677 2,702.70 4,532,595 13.91
<br />Decane 0.028 1,815 76,230 1,677 35,714.29 59,895,000 183.81
<br />Benzene 7.4 1,815 76,230 1,677 135.14 226,630 0.70
<br />(acute)
<br />Benzene 1.4 1,815 76,230 1,677 714.29 1,197,900 3.68
<br />(chronic)
<br />Threshold Volume for
<br />Detection Limit (67 bbl) Toxicity
<br />Acute Flow Rate Flow Rate 2.2% (gal) Toxicity gal of
<br />Toxicity (bbl) (gal) Multiplier
<br />Hexane 3.9 67 2,814 62 256.41 15,874 0.05
<br />Octane 0.37 67 2,814 62 2,702.70 167,319 0.51
<br />Decane 0.028 67 2,814 62 35,714.29 2,211,000 6.79
<br />Benzene 7.4 67 2,814 62 135.14 8,366 0.03
<br />(acute)
<br />Benzene 1.4 67 2,814 62 714.29 44,220 0.14
<br />(chronic)
<br />Threshold Volume for
<br />Below Detection (744 bbl) Toxicity
<br />Acute Flow Rate Flow Rate 22% (gal) Toxicity gal of
<br />Toxicity (bbl) (gal) Multiplier
<br />Hexane 3.9 744 31,248 687 256.41 176,271 0.54
<br />Octane 0.37 744 31,248 687 2,702.70 1,857,989 5.70
<br />Decane 0.028 744 31,248 687 35,714.29 24,552,000 75.35
<br />Benzene 7.4 744 31,248 687 135.14 92,899 0.29
<br />(acute)
<br />Benzene 1.4 744 31,248 687 714.29 491,040 1.51
<br />(chronic)
<br />Toxicity for Hexane, Octane, and Decane is 48-H LC5o for Freshwater Cladocera, and Acute and Chronic Toxicity for Benzene
<br />is for Rainbow Trout. EPA AQUIRE Database (1998). Data Summarize Conventional Acute Toxicity Endpoints (LC50 and
<br />EC5o); Geometric Mean is Reported when Several Results were Available for a Given Species.
<br />Petroleum product residue (i.e., heavy hydrocarbons) could persist in the reservoir with uptake into the
<br />food chain and ingestion by bald eagles. The concentration of residue in the reservoir is not expected to
<br />be high even with a large spill because of the relatively large fraction of evaporates and small fraction of
<br />residues. Conservation measures for rapid response and clean-up of spills or leaks would minimize the
<br />volume of material that could affect the environment and bald eagles.
<br />The fraction of polycyclic aromatic hydrocarbons (PAHs), also known as polynuclear aromatic
<br />hydrocarbons (PNAs), is small in refined petroleum product. However, some residual of PAHs would be
<br />expected following a petroleum product spill. Polycyclic aromatic hydrocarbons are compounds
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<br />P.O. Lox AA - Towaoc, CO 54334
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