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Appendix C: National Seepage of Crude Oil into the Marine Enviornment
Pages 191-192

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From page 191...
... Estimating the amount of natural seepage of crude oil into the marine environment involves broad extrapolations from minimal data. The National Research Council (1975,1985)
From page 192...
... Nevertheless, recent and improved data from the northern Gulf of Mexico and from offshore southern California indicate that oil seepage rates were likely underestimated in 1985 (National Research Council, 1985~. Based on the above information and using the methods of Kvenvolden and Harbaugh (1983)

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