12.1.7 Record of the piezometer installation

The record of the piezometer installation shall be attached to the summary log and include the following essential information, if applicable (see also B.6).

a) General information:

  • 1) name of the enterprise installing the piezometer;
  • 2) name of the client or representative;
  • 3) date of the piezometer installation;
  • 4) identification of the project;
  • 5) identification of the borehole or groundwater measuring station;
  • 6) position and elevation of borehole or groundwater measuring station;
  • 7) whenever possible the depth of the free groundwater surface;
  • 8) installation level (filter or perforated part of pipe).

b) Information on the used equipment:

  • 1) type and manufacturer of the equipment;
  • 2) method of installation (e.g. in a borehole, pushed, rammed);
  • 3) type of filter and tube (inside diameter filter, percentage, length and width of the slots, wall thickness, filter material, pushed or drilled, etc.);
  • 4) type and depths of the filter pack;
  • 5) type and depths of sealing;
  • 6) number of the equipment for closed systems.

c) Information on the installation:

  • 1) level of the ground surface and the upper end of the extension pipe;
  • 2) depth from the upper end of the pipe to the midpoint of the filter or perforated part of pipe;
  • 3) level of sensor in read-out device (i.e. level of manometer or transducer in hydraulic systems and level of measuring membrane in pneumatic and electrical systems).

d) Other information:

  • 1) observations and readings during installation;
  • 2) observations and readings before, during and after function control;
  • 3) date and result of first relevant reading;
  • 4) name and signature of the qualified operator.

For all measuring stations, a graphical presentation of the installation (with the corresponding soil and rock strata, if possible) should be prepared for documentation of the entire measuring system. In particular, the height level of the built-in filters should be recorded; for hydraulic systems, the height level of the transducer on the ground should also be recorded.

Dimensions in metres
Example of the configuration of an open groundwater measuring system

Key

1 street cap
2 top cap
3 borehole material
4 borehole (diameter 178 mm )
5 clay sealing
6 plastic casing tube
  7 counter-filter
8 plastic screen (0,50 mm)
9 filter gravel (grain size 1,0 mm to 2,0 mm)
10 borehole (diameter 146 mm)
11 bottom cap
  12 clay sealing
13 sand
14 silt
15 clay
16 limestone
GW ground water surface
Figure 10 — Example of the configuration of an open groundwater measuring system

12.1.8 Record of groundwater measurements

12.1.8.1 The record of groundwater measurements shall be attached to the summary log and include the following essential information, if applicable (see B.7).

a) General information:

  • 1) name of enterprise performing the groundwater measurements;
  • 2) name of client or representative;
  • 3) date of groundwater measurements;
  • 4) identification of the project;
  • 5) identification of the borehole or piezometer.

b) Information on the measurement:

  • 1) time for each separate groundwater measurement;
  • 2) measured values;
  • 3) measured atmospheric pressure;
  • 4) calculated pressures;
  • 5)comments on observations or performed checks of importance for the interpretation.

c) Other information:

  • 1) name and signature of the qualified operator.

12.1.8.2 Further, a record of the calibration of groundwater measuring systems shall be supplied to the record of the groundwater measurements. The record of the calibration of groundwater measuring systems shall include the following essential information, if applicable (see B.8):

  • a) date and place of calibration;
  • b) the manufacturer and number of the calibrated device;
  • c) the type, number and precision of the reference instrument;
  • d) latest calibration;
  • e) any information relevant for the application of the calibration;
  • f) name and signature of the person who is responsible for the calibration.

12.2 Report of the results

The report of the results shall include the following essential information, if applicable:

  • a) The field report (in original and/or computerised form);
  • b) a final record of the identification and description of soil and rock, according to ISO 14688-1 and ISO 14689-1;
  • c) a graphical presentation of the record of the drilling parameters;
  • d) a graphical presentation of the final record of the identification and description of soil and rock;
  • e) a graphical presentation of the backfilling;
  • f) a graphical presentation of the piezometer;
  • g) a graphical or numerical presentation of the results of the groundwater measurements;
  • h) name and signature of the responsible expert.

ISO 22475-1 Sampling by drilling and excavation and groundwater measurements. Part 1: Technical principles of execution