Question

In: Civil Engineering

A community’s groundwater has been contaminated by perchloroethylene after years of operation of a dry-cleaning business....

A community’s groundwater has been contaminated by perchloroethylene after years of operation of a dry-cleaning business. Groundwater supplies a spring that feeds a pond and stream and is also the source for a well. A local family relies on the well for their drinking water and regularly eats fish caught in the stream and pond. The concentration of perchloroethylene in the groundwater is found to be 80 mg/L, and the chronic oral RfD is 0.006 mg/kg/day.

a.) Assuming all exposure to perchloroethylene comes from consumption of fish and water, and that children and adults eat the same amount of fish on average per day, calculate the Estimated Exposure Dose (EED) for an adult and a child.

b.) What are the adult and child hazard ratios (HR) for this scenario? Interpret the results.

The average body weight of an adult is 70kg, the average body weight of a child is 10kg, and the amount of fish consumed is 6.5g/day.

Solutions

Expert Solution


Related Solutions

For several years, Anne Schippel has been the business banker for the company, Dry Supply. After...
For several years, Anne Schippel has been the business banker for the company, Dry Supply. After reviewing the company balance sheet, she makes the following observations. Three major asset accounts are on the books of Dry Supply: accounts receivable, inventory, and fixed assets. the amount of accounts receivable and inventory are characteristic of a wholesaler. Please Review the Dry Supply Income Statement Spread and Balance Sheet Spread on the next two pages and follow the instructions below: INSTRUCTIONS: For each...
AM Enterprise, a merchandising business, has been in operation for a few years. The business used...
AM Enterprise, a merchandising business, has been in operation for a few years. The business used the perpetual inventory system in its transaction recording. Below is the business’s Trial Balance as at 31 December 2019: AM Enterprise Trial Balance as at 31 December 2019 Debit Credit RM RM Cash 17,500 Account Receivable 6,200 Merchandise Inventory 8,000 Office Equipment 24,000 Accumulated Depreciation - Office Equipment 7,200 Account Payable 6,500 Capital 42,000 55,700 55,700 The transactions occurred during the month of January...
Acme Dry cleaning has an on-campus location with 5 years to go on its lease. An...
Acme Dry cleaning has an on-campus location with 5 years to go on its lease. An existing dry cleaning machine will last for the 5-year duration of the lease, at which time it will be worn out and worthless. A machine will be more efficient and will allow the company to handle a broader range of fabrics. As a result, the new machine will increase revenues by $1,500 a year and decrease operating costs (other than depreciation) by $600 per...
Cleaning and Disinfecting Surfaces and Equipment Reusable equipment and surfaces that have been contaminated by blood...
Cleaning and Disinfecting Surfaces and Equipment Reusable equipment and surfaces that have been contaminated by blood or other potentially infectious materials need to be properly cleaned and disinfected before the equipment is put back into service or the area is reopened. Clean and disinfect surfaces and equipment as soon as possible after the incident occurs. Remember to wear appropriate PPE. If blood or other potentially infectious materials have spilled on the floor or another surface, prevent others from accessing the...
Cleaning and Disinfecting Surfaces and Equipment Reusable equipment and surfaces that have been contaminated by blood...
Cleaning and Disinfecting Surfaces and Equipment Reusable equipment and surfaces that have been contaminated by blood or other potentially infectious materials need to be properly cleaned and disinfected before the equipment is put back into service or the area is reopened. Clean and disinfect surfaces and equipment as soon as possible after the incident occurs. Remember to wear appropriate PPE. If blood or other potentially infectious materials have spilled on the floor or another surface, prevent others from accessing the...
Difend Cleaners has been considering the purchase of an industrial dry-cleaning machine. The existing machine may...
Difend Cleaners has been considering the purchase of an industrial dry-cleaning machine. The existing machine may be sold for $100,000. The new machine will cost $350,000 and an additional cash investment in working capital of $100,000 will be required. The investment is expected to net $110,000 in additional cash inflows during the first year of acquisition and $250,000 each additional year of use. The new machine has a three-year life, and zero disposal value. Income taxes are not considered in...
Speedy Dry Cleaning, like many dry cleaners, has a standard offer for dress shirts. If you...
Speedy Dry Cleaning, like many dry cleaners, has a standard offer for dress shirts. If you drop your shirt off by noon, they will have it back the next day for a price of $3.50 per shirt. Because they offer the fast service, they have special contracts with their cleaning suppliers just for the shirt service. They pay $1.50 per shirt, plus a weekly fee of $80.00. 1. How many shirts does Speedy need to dry clean per week in...
1. Carlos plans to start a new dry cleaning business. For that he purchased a space...
1. Carlos plans to start a new dry cleaning business. For that he purchased a space which costed him $100,000. For that he withdrew his savings worth $50,000 and borrowed the remaining $50,000 from a bank. His savings was earning him 3% interest per annum and the banks charges him 6% interest per annum. Based on this what would be Carlos opportunity cost of purchasing the space? a. $3,000 b. $1,500 c. $3,000 d. $4,500 2. Which of the following...
Max, Nat and Roberta formed a partnership to operate a dry-cleaning business. They agreed to share...
Max, Nat and Roberta formed a partnership to operate a dry-cleaning business. They agreed to share initial capital and subsequent income in a 5:3:2 ratio. Each partner’s contributions to the new venture are listed next. Max: $25,000 cash, dry-cleaning equipment worth $180,000 and the ability to keep the equipment in good operating condition. Nat: $15,000 cash and extensive experience in the dry-cleaning business. Roberta: $20,000 cash and a 2-year $75,000 note, payable to the firm, with 3 percent interest on...
Dougherty Corporation purchased a new delivery van for use in its dry cleaning business. As part...
Dougherty Corporation purchased a new delivery van for use in its dry cleaning business. As part of the purchase of the van the following costs were incurred: Acquisition cost 30,000, Sales tax 1,800, Title transfer 250, and two year service contract 1,600. What would be the capitalized cost of the van in Dougherty’s financial statements? $30,000 $32,050 $30,250 $33,650 When is goodwill recognized and reported as an intangible asset in a company’s balance sheet? The market value of a firm’s...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT