Hewitt, A.D. 1992. Potential of Common Well Casing Materials to Influence

Aqueous Metal Concentrations. Ground Water Monitoring Review, Vol. 12,

No. 2, pp. 131 136.

Jones, J.N. and G.D. Miller. 1988. Adsorption of Selected Organic

Contaminants onto Possible Well Casing Materials, in A.G. Collins and A.I.

Johnson, eds., Ground Water Contamination: Field Methods, ASTM STP 963,

American Society for Testing and Materials, Philadelphia, PA, pp. 185 198.

Parker, L.V. 1991. Discussion of "The Effects of Latex Gloves and Nylon

Cord on Ground Water Sample Quality" by J.L. Canova & M.G. Muthig.

Ground Water Monitoring Review, Vol. 11, No. 4, pp. 167 168.

Parker, L.V., A.D. Hewitt, and T.F. Jenkins. 1990. Influence of Casing

Material on Trace Level Chemicals in Well Water. Ground Water Monitoring

Review, Vol. 10, No. 2, pp. 146 156.

Reynolds, G.W., J.T. Hoff, and R.W. Gillham. 1990. Sampling Bias Caused

by Materials Used to Monitor Halocarbons in Groundwater. Environmental

Science Technology, Vol. 24, No. 1, pp. 135 142.

Laboratory studies of the effects of well casing materials on either inorganic or

organic dissolved constituents in ground water are still relatively inconclusive and incomplete;

they serve solely to demonstrate the potential for well casing related alteration of ground 

water samples. The manipulation of raw data may allow investigators to reach conclusions

that are unsupported given further evaluation of the raw data and test conditions.

Construction materials for piezometers that will be used solely for measuring water

levels are not the focus of this section. For the purposes of water level monitoring during

detection monitoring, thermoplastic materials are usually adequate. However, in compliance

(or assessment) monitoring and corrective action, care should be taken to construct

piezometers of materials that will not degrade or react with contaminated ground water.

6.2.1

General Casing and Screen Material Characteristics

Historically, well casings and screens were produced predominantly for water supply

wells, and the selection of a well casing or screen material focused on structural strength,

durability in long term exposure to natural ground water environments, and ease of handling.

The selection of the most suitable well casing and screen materials should consider site 

specific factors, including:

November 1992

6 19