Standard Practice for Design and Installation of Groundwater Monitoring Wells

Importancia y uso:

4.1 This practice for the design and installation of groundwater monitoring wells will promote (1) efficient and effective site hydrogeological characterization; (2) durable and reliable well construction; and (3) acquisition of representative groundwater quality samples, groundwater levels, and hydraulic conductivity testing data from monitoring wells. The practices established herein are affected by governmental regulations and by site-specific geological, hydrogeological, climatological, topographical, and subsurface geochemical conditions. To meet these geoenvironmental challenges, this practice promotes the development of a conceptual hydrogeologic model prior to monitoring well design and installation.

Note 1: This practice presents a design for monitoring wells that will be effective in the majority of formations. This practice is in general accordance with other national and state guidance documents on well construction (ANSI/NGWA-01-14 (1)4 and California EPA (2)) however; national, state, or local design regulations may control design and installation.

4.2 A properly designed and installed groundwater monitoring well provides essential information on one or more of the following subjects:

4.2.1 Formation geologic and hydraulic properties;

4.2.2 Potentiometric surface of a particular hydrologic unit(s);

4.2.3 Water quality with respect to various indicator parameters; and

4.2.4 Water chemistry with respect to a contaminant release.

Note 2: The quality of the result produced by this standard is dependent on the competence of the personnel performing it and the suitability of the equipment and facility used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some, but not all, of those factors.

Practice D3740 was developed for agencies engaged in the laboratory testing and/or inspection of soils and rock. As such, it is not totally applicable to agencies performing this practice. However, user of this practice should recognize that the framework of Practice D3740 is appropriate for evaluating the quality of an agency performing this practice. Currently there is no known qualifying national authority that inspects agencies that perform this practice. Use of certified water well drillers are recommended. There are national and state agencies that certify water well drillers.

Subcomité:

D18.21

Referida por:

D6564_D6564M-17R24, F0480-14R22, D4716_D4716M-22, D5783-18, D6771-21, D6452-18R23, D6574_D6574M-13R21, D6286_D6286M-20, D0653-24A, D6725_D6725M-16R24E01, D6914_D6914M-16R24, D0420-18, D8571-24, D7663-12R24, D6724_D6724M-16R24E01, D6067_D6067M-17, D6001_D6001M-20, D6391-11R20, D5980-16R24, D7929-20, D5876_D5876M-17R24, D5978_D5978M-16R24

Volúmen:

04.08

Número ICS:

13.060.10 (Water of natural resources)

Palabras clave:

aquifer; borehole drilling; geophysical exploration; groundwater; monitoring well; site investigation;