Log in
Chemistry
2
answers
3
watching
745
views

Types of analysis The residents in a neighborhood near a hazardous-waste disposal site are concerned that it is leaking contaminants into their groundwater.

Watch
2
answers
3
watching
745
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Avatar image
Read by 5 people
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions


A tank farm at a local chemical distribution facility is leaking and is contaminating the groundwater, causing a concentration directly beneath the site of 14.5 milligrams per liter (mg/L). The groundwater is flowing at the rate of 0.25 meters per day toward a public drinking water well one kilometer away. Preliminary measurements indicate that the chemical is subject to degradation in the aquifer with a half -life of 11 years. It also appears that there is a retardation factor in effect, whereby the rate at which the chemical flows is only half the rate of groundwater flow. To be conservative, assume the pollutant does not disperse within the aquifer, but merely flows along with it. The public well pumps 75,000 gallons of water per day, delivered to 50,000 customers.

How do you set this problem up?

What is given in the problem?

How do these factors relate to one another?

Estimate the steady-state pollutant concentration expected at the well.

Estimate daily dose for a 70-kg adult ingesting 2 L/day of this water. USEPA default of 30 years

If the carcinogenic potency of the contaminant is 0.02 (mg/kg/day)-1, estimate the excess cancers per year in this population if they were to drink this water for 70 years.

Predict the impact of contaminated water on an infant ingesting 1L/day and with a mass of 5 kg.

2) For a typical sand and gravel aquifer, estimate the one-year travel distance for water when the hydraulic gradient is 0.0004 m/m.

3)You are interested in the travel time for benzene that has contaminated an aquifer due to its leaking from an underground storage tank at a gasoline station. Here is what you know. The aquifer is sandy, the water table drops by 0.2 m over a horizontal distance of 600 m in the direction of groundwater flow, and benzene has a retardation factor of 4. How long will it take the water and the benzene to travel 600m? (two answers)

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in