By Chris Landau (Geologist/meteorologist)
Please open the link to see a map of benzene locations I have plotted, for 114 points using data from the EPA web site. I have used values above 4 parts per billion for data gathered by the mobile testing stations for the period June 24-29.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_yZ0Y-U2zpsqL_doJxepfTM7GVJC4Nzi3UEqQCYaPCleIPUMtRqDfz4rvTfvbMDEvZz78peoP_YtdU-GHBJWD4dCgrb7jKJPt8k7Mm9tiZdxP_u8EjzcR41QaJ9Bnq3TiQHHYmkrRN1uP/s400/Gulf_Benzene.gif)
EPA has a table that makes recommendations for levels of certain volatile organic compounds in micrograms/m3. At code yellow, they express a level of health concern for the public.
Benzene levels have risen in some places to EPA Code yellow or 20 micro grams/m3. 1000 ppb= 3.19 micro grams per cubic meter or1 ppm benzene = 3.19 mg/m3. The highest level recorded for the few days, I took the data was about 72.831 ppb. That translates to 232.33 micro grams/m3. I wonder what code red is?
232.33micro grams/m3 is more than 10 times higher (emphasis mine) than the code yellow concern level of 20 micro grams/m3.
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