Ethylene dibromide (ETB) has been found in some wells in State College, PA. ETB

Question

Ethylene dibromide (ETB) has been found in some wells in State College, PA. ETB has a specific gravity of 2.2. and has a solubility of 0.4 g/100 g of water. The oral potency factor is 85 (mg/kg-day)^1 and the RfD is 9.3 times 10^3 mg/kg day. What is the solubility of ETB in mg/L? Calculate the safe concentration of ETB m the water considering both the Rf D and the oral potency factor. You decide to use pump and treat to remove the ETB from the groundwater. You are told that the aquifer is contaminated for 1000 ft. The groundwater has a concentration of 1 ppb and you need to remove it down to 0.05 ppb The aquifer has a hydraulic conductivity of 1000 gal/ft^7 day, a hydraulic gradient of 0.003 and an area of 50 ft^2. Calculate how long it will take to remove the ETB to acceptable levels if you pump the water at the same rate as the flow m the aquifer.

Explanation / Answer

Please Note: The main sources of information for this fact sheet are EPA's Integrated Risk Information System (IRIS), which contains information on the carcinogenic effects of ethylene dibromide including the unit cancer risk for inhalation exposure, and the Agency for Toxic Substances and Disease Registry's (ATSDR's) Toxicological Profile for 1,2-Dibromoethane.

Uses

Sources and Potential Exposure

Assessing Personal Exposure

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.