How much benzene is allowed in gasoline?

The EPA limits the percentage of benzene allowed in gasoline to an average of 0.62% by volume (with a maximum of 1.3%). The EPA limits concentrations of benzene in drinking water to 5 ppb (parts per billion). Some states may have lower limits.

Is benzene still in gasoline?

Benzene is also a natural part of crude oil, gasoline, and cigarette smoke. Benzene is widely used in the United States.

Is there a safe level of benzene?

OSHA: The legal airborne permissible exposure limit (PEL) is 1 ppm averaged over an 8-hour workshift and 5 ppm, not to be exceeded during any 15-minute work period.

What is benzene gasoline?

Benzene is a highly flammable, often colorless chemical that, at room temperature, is liquid, but evaporates quickly. Benzene occurs naturally in crude oil. Benzene is a component of petroleum products including diesel fuel and gasoline. Benzene is among the twenty most utilized chemicals in the United States.

Where is benzene found in the home?

Benzene is produced naturally by volcanoes and forest fires. In homes, benzene may be found in glues, adhesives, cleaning products, paint strippers, tobacco smoke and gasoline. Most benzene in the environment comes from our use of petroleum products. Benzene quickly evaporates from water or soil.

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Why does gas smell so good?

Benzene is added to the gasoline to increase octane levels, which improves engine performance and fuel efficiency. Benzene has a naturally sweet smell that most noses are particularly sensitive to. It’s so pungent that the human nose can detect it if there’s just 1 part per million in the air that we breathe.

How long does benzene stay in your system?

Some of the harmful effects of benzene exposure are caused by these metabolites. Most of the metabolites of benzene leave the body in the urine within 48 hours after exposure.

At what level can you smell benzene?

Most individuals can begin to smell benzene in air at 1.5 to 4.7 ppm. The odor threshold generally provides adequate warning for acutely hazardous exposure concentrations but is inadequate for more chronic exposures.

What is a high level of benzene?

OSHA limits exposure to benzene in the air in most workplaces to 1 ppm (part per million) during an average workday and a maximum of 5 ppm over any 15-minute period. When working at potentially higher exposure levels, OSHA requires employers to provide personal protective equipment such as respirators.

What foods contain benzene?

4. Analysis of Benzene in Foods

Food Benzene concentration Reference
Organ meats Fruit-based products, chicken, fish, peanuts, potatoes, vegetable oils 18 ppb <1 ppb [43]
Fruits, cheese, eggs, others Roasted peanuts Pickled olives <1 ppb 1,85 ppb 2,19 ppb [6]
Carbonated soda beverages (118 samples) 1.1–3.67 ppb [44]
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