Potential influences of common well casings on metal concentrations in well water with low dissolved oxygen

Technical Report · Mon Jul 01 04:00:00 EDT 1991

OSTI ID:6263432

Hewitt, A D

Representativeness of analyte concentrations collected from ground water monitoring wells has come into question. The focus of this issue is the selection of well encasement material, stemming from recommendation for only stainless steel and poly(tetrafluoroethylene) (PTFE). Accurate determination of the presence and concentrations of hazardous waste transported with ground water is jeopardized if the materials used in monitoring wells influence the solution chemistry. Recent studies of rigid PVC and PTFE examining the rate at which these two materials sorb organic compounds from aqueous solution, concluded that rigid PVC was superior to PTFE. The other recommended material, stainless steel is composed of iron, chromium and nickel. Metal versus polymeric casings has been questioned. Studies of ground water collected from wells encased with steel indicate that the leaching of metals from these materials is a continuous process. Laboratory experiments have shown stainless steels to have the greatest potential to leach barium, cadmium, lead, and copper or sorb arsenic, chromium and lead in comparison to PVC and PTFE. These studies attributed release or sorption of metal analytes by stainless steel and steel to be associated with corrosion.

• Research Organization: Cold Regions Research and Engineering Lab., Hanover, NH (United States)
• OSTI ID: 6263432
• Report Number(s): AD-A-241014/0/XAB; CRREL--91-13
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ALKALINE EARTH METALS
ARSENIC
BARIUM
CADMIUM
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMIUM
CONTAMINATION
COPPER
CORROSION
DISSOLUTION
DISSOLVED GASES
ECOLOGICAL CONCENTRATION
ELEMENTS
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
GASES
GROUND WATER
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
IRON
LEACHING
LEAD
METALS
MONITORING
NICKEL
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN
OXYGEN COMPOUNDS
PIPES
POLLUTION
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
SEMIMETALS
SEPARATION PROCESSES
SOLUTES
SORPTION
TRANSITION ELEMENTS
WATER
WATER POLLUTION
WATER WELLS
WELL CASINGS
WELLS