identify the most likely leakage source within a toxic waste site. In a toxic waste disposal...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
identify the most likely leakage source within a toxic waste site. In a toxic waste disposal site, contaminants are stored in barrels that are designed to be resistant to leakage for a long period of time. However, failure of the containers is eventually possible, so additional measures are in place to detect any leakage that might occur. Specifically, below the dump site is a layer of sand, and if a toxin reaches this layer it will diffuse through the water in the sand layer and then be detected at the monitoring wells adjacent to the site. Clean Water Monitoring Well Toxic Waste Disposal Site Sand layer Monitoring Well Clean Water 2000 m Side view of the waste site. The pollutant concentration in the sand layer, C(x), is dictated by where -DAC" (x) + vAC'(x) = f(x) A is the cross-sectional area of the sand layer, vis the interstitial velocity of water through the sand layer, and D is the diffusion coefficient of the sand layer. For this particular sand layer: The cross-section of the sand layer is A = 10 m, and the sand has a diffusion coefficient of D = 10-8 m/s. Interstitial velocity in the sand layer v is so low its direction is difficult to determine. It could be anywhere between -10-13 and +10-13 m/s. I.e. very low, and directed either to the right or the left on the diagram. The pollutant at the ends of the sand layer is maintained at C = 0 ppm by the action of clean surface water. Mathematically, C(0) C(2000) = 0. Chromium, a toxic pollutant, has now been detected in both monitoring wells. After an initial increase, the concentration at each well site has stabilized at: Well Location Conc. (ppm) = 200 = 1800 120 70 In the dump site, there are five locations where chromium is stored. Your task is to identify the most likely site for the source of the chromium in the groundwater, to minimize the cost and risk of the subsequent barrel-by-barrel search for the leak source. Monitoring Well 200 m B Site 2000 m- Monitoring Well 200 m- D E A B C D E Location (m) 450-550 600-700 800-900 1100-1200 1600-1700 General Report Specification The intended audience for this report is a work supervisor, not a fellow student or professor. This means that the focus should be on the results and the evidence and less on the method of arriving at the results. For this style of report, usually little or no mathematical derivation of your results should be included, as your boss assumes you know what you are doing. (Yes, you will need to do a fair bit of math, but it should not play a prominent role in the report itself.) The report must: restate the problem to be solved, but only briefly; you can assume that your supervisor is familiar with the general problem; must state your preferred solution to the problem clearly and concisely, along with your rationale; be limited to 1 page of raw text, though up to 2 pages total are allowed when graphs and tables are included. Possible Questions to Address How did you quantify or rank the possible pollutant sites? Are there any pollutant sources that yield similar results to your choice? How did you address the uncertainties inherent in the problem? How large, small, significant, important, negligible, etc. is the difference between possible site sources? What future analysis or monitoring options might be interesting to explore? identify the most likely leakage source within a toxic waste site. In a toxic waste disposal site, contaminants are stored in barrels that are designed to be resistant to leakage for a long period of time. However, failure of the containers is eventually possible, so additional measures are in place to detect any leakage that might occur. Specifically, below the dump site is a layer of sand, and if a toxin reaches this layer it will diffuse through the water in the sand layer and then be detected at the monitoring wells adjacent to the site. Clean Water Monitoring Well Toxic Waste Disposal Site Sand layer Monitoring Well Clean Water 2000 m Side view of the waste site. The pollutant concentration in the sand layer, C(x), is dictated by where -DAC" (x) + vAC'(x) = f(x) A is the cross-sectional area of the sand layer, vis the interstitial velocity of water through the sand layer, and D is the diffusion coefficient of the sand layer. For this particular sand layer: The cross-section of the sand layer is A = 10 m, and the sand has a diffusion coefficient of D = 10-8 m/s. Interstitial velocity in the sand layer v is so low its direction is difficult to determine. It could be anywhere between -10-13 and +10-13 m/s. I.e. very low, and directed either to the right or the left on the diagram. The pollutant at the ends of the sand layer is maintained at C = 0 ppm by the action of clean surface water. Mathematically, C(0) C(2000) = 0. Chromium, a toxic pollutant, has now been detected in both monitoring wells. After an initial increase, the concentration at each well site has stabilized at: Well Location Conc. (ppm) = 200 = 1800 120 70 In the dump site, there are five locations where chromium is stored. Your task is to identify the most likely site for the source of the chromium in the groundwater, to minimize the cost and risk of the subsequent barrel-by-barrel search for the leak source. Monitoring Well 200 m B Site 2000 m- Monitoring Well 200 m- D E A B C D E Location (m) 450-550 600-700 800-900 1100-1200 1600-1700 General Report Specification The intended audience for this report is a work supervisor, not a fellow student or professor. This means that the focus should be on the results and the evidence and less on the method of arriving at the results. For this style of report, usually little or no mathematical derivation of your results should be included, as your boss assumes you know what you are doing. (Yes, you will need to do a fair bit of math, but it should not play a prominent role in the report itself.) The report must: restate the problem to be solved, but only briefly; you can assume that your supervisor is familiar with the general problem; must state your preferred solution to the problem clearly and concisely, along with your rationale; be limited to 1 page of raw text, though up to 2 pages total are allowed when graphs and tables are included. Possible Questions to Address How did you quantify or rank the possible pollutant sites? Are there any pollutant sources that yield similar results to your choice? How did you address the uncertainties inherent in the problem? How large, small, significant, important, negligible, etc. is the difference between possible site sources? What future analysis or monitoring options might be interesting to explore?
Expert Answer:
Related Book For
Intermediate Accounting
ISBN: 978-0324592375
17th Edition
Authors: James D. Stice, Earl K. Stice, Fred Skousen
Posted Date:
Students also viewed these mathematics questions
-
Supply chains of the Roman Empire had much in common with modern supply chains. Supply chains then and now require development of good mental models to understand them and keep them working well....
-
"internet radios" for streaming audio, and personal video recorders and players. Describe design and evaluation processes that could be used by a start-up company to improve the usability of such...
-
12. For a piece of material, the steady state flow of material across its thickness is 0.250 x 10 kg/m-hr. If the concentrationon the high side of the material is 1.85 kg/m and is 0.06 kg/m on the...
-
Refer to the allocation of dividends for Pinecraft Industries Inc. on page 485 . Answer these questions about Pinecraft's cash dividends: 1. How much in dividends must Pinecraft declare each year...
-
On June 1, 2018, Andre Company and Agassi Company merged to form Lancaster Inc. A total of 800,000 shares were issued to complete the merger. The new corporation reports on a calendar-year basis. On...
-
Thomas Rusnack and his then-wife, Analisa Rusnack, opened a home equity line of credit (HELOC) with Cardinal Bank in August 2003. Between 2003 and 2006, the Rusnacks periodically drew on the HELOC...
-
(Amortization of Accumulated OCI (G/L), Corridor Approach, Pension Expense Computation) The actuary for the pension plan of Gustafson Inc. calculated the following net gains and losses. Other...
-
A new university has been built outside a small town in Scotland, which has resulted in a mass influx of workers and their families to the area. As a result of this, the town has been suffering from...
-
On January 1, 2023, Pulaski, Incorporated, acquired a 60 percent interest in the common stock of Sheridan, Incorporated, for $392,400. Sheridan's book value on that date consisted of common stock of...
-
If the magnetic field in a traveling EM wave has a peak magnitude of 8,872 pT, what is the peak magnitude of the electric field (in V/m)?
-
Use the information below to find the percentage that the loan and bond issue contribute to this company's total debt. Market value, $30,000,000 loan Market value, 35,000,000 bonds Loan interest...
-
What areas of financial analysis might be impacted by a negative shock? What effect might this have on the financial analysis sector? Will negative shocks impact at the same level for all industries?...
-
How do you define wealth? explain the factors affecting wealth in details?
-
How is wealth created in the first place?
-
Discuss the design principles underlying modern networking subsystems in operating systems, including protocol stack implementations, socket abstraction layers, and packet processing techniques....
-
The titration technique is used to do the reaction because the 0.1 M NaOH can be added sequentially and the pH is monitored as the moles of HA react to form NaA. The Ka is calculated at the three...
-
Suppose that a business sells 6-month subscriptions to its monthly magazine. On January 1, the company receives a total of $600 for 10 subscriptions. To record this transaction, the company debits...
-
International Inc. owns companies or the stock of companies in countries all over the world. International is reviewing its methods of accounting for those companies and has asked you to provide...
-
Refer to Practice 9-6. Assume that the sales occurred as follows: Units Sold January 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 July 15 . . . . . . . . . . . . ....
-
Bicknel Technologies Inc. purchased the following securities during 2010: At the beginning of 2010, Bicknel Technologies had a zero balance in each of its market adjustment accounts. During 2011,...
-
Which of the following is a discrete probability distribution? Approach In a discrete probability distribution, the sum of the probabilities must equal 1, and all probabilities must be between 0 and...
-
Graph the discrete probability distribution given in Table 1 from Example 2. Approach In the graph of a discrete probability distribution, the horizontal axis represents the values of the discrete...
-
Compute the mean of the discrete random variable given in Table 1 from Example 2. Approach Find the mean of a discrete random variable by multiplying each value of the random variable by its...
Study smarter with the SolutionInn App