Page 105 - Water Engineering Hydraulics, Distribution and Treatment

Example of sanitary and field survey report for hydrogeologic assessment
Table 3.6
Well location and characteristics
Water system name/address/Fed ID#
Name of site
Description of device
Name and description of nearby surface source(s)
Describe datum for elevations
Is there a USGS gauging station nearby, or are other flow records available?
Static water level 3.20 Groundwater Under the Direct Influence of Surface Water 83
As a depth Date
As an elevation Date
Pumping water level
As a depth Date
As an elevation Date
Characterize pumping practices or spring flow (rates, seasonally, etc.)
Describe the vertical distance between the aquifer and the surface water under pumping conditions

Describe the horizontal distance between the aquifer and the surface-water source under pumping conditions
Well construction
Construction date
Does construction conform to the current standards (i.e., Ten State)?
Construction methods/materials
Casing
Grouting
Screening
Well house
Other information
Is a detailed plan/drawing available?
Hydrogeology
Is a geologic log for this well available?
What is the thickness of the unsaturated zone?
What is the hydraulic conductivity of the unsaturated zone and the aquifer?
Is there a confining layer? At what elevation(s)?
Describe
Does the surface-water body penetrate the aquifer?
Draw the aquifer(s), confining unit(s), and water table using one or more cross-sections with at least one cross-section parallel to the
flow direction
Summary of sanitary conditions
Describe the results of past sanitary surveys and give the location of written reports

in Fig. 3.18. Information collected as part of the charac- worst-case conditions, when maximum potential recharge
terization of hydraulic communication and time of travel from the nearby surface water is taking place (usually during
will be very important in determining the correct timing of extremely wet or dry periods).
MPA sample collection. MPA samples must be collected Basically, the use of MPA in a GWUDI determination
at least twice, and the dates of sampling should represent involves the careful enumeration of microscopic organisms