Page 193 - Water and wastewater engineering

4-48 WATER AND WASTEWATER ENGINEERING

c. Well protection requirements
(1) Casing
(2) Grouting
(3) Disinfection
(4) Well house specifications

d. Pump details
(1) Capacity
(2) Select a candidate pump
(3) Specify the number of stages and NPSH

4-23. Your firm has been retained to develop plans for a well system for the village of
Waffle. Using the design elements listed above Problem 4-23 and the following data,
design the well system.
a. Population: 250
b. Demand: 570 Lpcd
c. Water is to be supplied from wells. No treatment will be provided.
d. Top of reservoir is 66.0 m above ground level
e. Friction losses minor losses in piping from well to top of reservoir 0.5 m
f. Water supply is to be chlorinated, but no other treatment will be provided.

TEST BORING RESULTS, WAFFLE

Bore hole no. 2 (surface elevation: 335 m)
Strata Thickness, m Depth to bottom of strata, m
Soil (Rubicon) 1.2 1.2
Sand 13.1 14.3
Clay, red 6.1 20.4
Galena dolomite 44.8 65.2
Maquoketa shale 39.0 104.2
Someko sand 41.9 146.1
Eau Claire shale Boring terminated at 146.1 m

An analysis of the water indicates that it is not corrosive.
Grain size analysis of Someko sand

U.S. sieve no. Wt. % retained
8 2
12 1
16 2
20 15
30 35
40 33
50 6
70 2
100 2
PAN 2