Using the table below, can you help me or show me how I would answer the following question. A confined aquifer with the top of the aquifer about 13.5 m below the surface. The aquifer is 5.5 m thick and is bounded by impervious rock below (forming the datum for the hydraulic head measurements) and a clay aquitard above. Analysis of the aquifer material reveals a bulk density of 1.75 g/cm3, porosity of 0.35 and 0.55% organic carbon. After a pumping test, you calculate that the transmissivity of the aquifer is 0.00025 m2/s and the storativity is 0.000055. What monitoring well(s) would you next expect to see toluene found in and in approximately how long? State any assumptions. UTM 10U Coordinates (m) Well # Hydraulic Head Toluene Conc E N (m) (ppm) 446800 5360000 1 12.43 ND[1] 446800 5359900 2 12.57 ND 446800 5359800 3 12.71 ND 446800 5359700 4 12.86 ND 446800 5359600 5 13.00 ND 446900 5360000 6 12.57 ND 446900 5359900 7 12.71 ND 446900 5359800 8 12.86 6.7 446900 5359700 9 13.00 110.6 446900 5359600 10 13.14 ND 447000 5360000 11 12.71 ND 447000 5359900 12 12.86 ND 447000 5359800 13 13.00 115.9 447000 5359700 14 13.14 121.7 447000 5359600 15 13.29 111.1 447100 5360000 16 12.86 ND 447100 5359900 17 13.00 ND 447100 5359800 18 13.14 ND 447100 5359700 19 13.29 113.3 447100 5359600 20 13.43 122.1
Using the table below, can you help me or show me how I would answer the following question.
A confined aquifer with the top of the aquifer about 13.5 m below the surface. The aquifer is 5.5 m thick and is bounded by impervious rock below (forming the datum for the hydraulic head measurements) and a clay aquitard above. Analysis of the aquifer material reveals a bulk density of 1.75 g/cm3, porosity of 0.35 and 0.55% organic carbon. After a pumping test, you calculate that the transmissivity of the aquifer is 0.00025 m2/s and the storativity is 0.000055. What monitoring well(s) would you next expect to see toluene found in and in approximately how long? State any assumptions.
|
UTM 10U Coordinates (m) |
Well # |
Hydraulic Head |
Toluene Conc |
|
|
E |
N |
(m) |
(ppm) |
|
|
446800 |
5360000 |
1 |
12.43 |
ND[1] |
|
446800 |
5359900 |
2 |
12.57 |
ND |
|
446800 |
5359800 |
3 |
12.71 |
ND |
|
446800 |
5359700 |
4 |
12.86 |
ND |
|
446800 |
5359600 |
5 |
13.00 |
ND |
|
446900 |
5360000 |
6 |
12.57 |
ND |
|
446900 |
5359900 |
7 |
12.71 |
ND |
|
446900 |
5359800 |
8 |
12.86 |
6.7 |
|
446900 |
5359700 |
9 |
13.00 |
110.6 |
|
446900 |
5359600 |
10 |
13.14 |
ND |
|
447000 |
5360000 |
11 |
12.71 |
ND |
|
447000 |
5359900 |
12 |
12.86 |
ND |
|
447000 |
5359800 |
13 |
13.00 |
115.9 |
|
447000 |
5359700 |
14 |
13.14 |
121.7 |
|
447000 |
5359600 |
15 |
13.29 |
111.1 |
|
447100 |
5360000 |
16 |
12.86 |
ND |
|
447100 |
5359900 |
17 |
13.00 |
ND |
|
447100 |
5359800 |
18 |
13.14 |
ND |
|
447100 |
5359700 |
19 |
13.29 |
113.3 |
|
447100 |
5359600 |
20 |
13.43 |
122.1 |
[1] Not detected
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