||Mineralogical study of borehole MW-206 Asarco Smelter Site Tacoma, Washington
||Environmental Protection Agency, Seattle, WA. Region X.
||U.S. Environmental Protection Agency, Office of Environmental Assessment,
||PB99-112138 ; EPA 910-R-98-009
Chemical analysis ;
X-ray diffraction ;
Scanning electron microscopy ;
Optical microscopy ;
Iron oxides ;
Remedial action ;
Fierce County(Washington) ;
||Region 10 Library/Seattle,WA
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||v, 146 p. : ill. ; 28 cm.
The mobility of metals in ground water is an important consideration for evaluating remedial options at the Asarco smelter site. Tacoma, Washington. One factor in assessing metal mobility is the degree of secondary mineralization in a slag-fill aquifer extending into the intertidal zone along the Puget Sound shoreline. Samples of aquifer material were collected for mineralogical analysis from borehole MW-206 at five-foot intervals within the slag fill from 5 to 25 feet below the ground surface, and in the underlying marine sand and gravel at 27 feet. Grab samples of slag fragments with visually apparent secondary minerals were also collected at five intermediate depths between 12 and 19 feet. Samples were analyzed by a variety of of techniques including hydride generation/atomic absorption for arsenic concentration, scanning electron microscopy/electron microprobe for mineralogical texture and microanalysis, powder x-ray diffraction for mineral identification, and optical microscopy for textural observations.
"EPA 910-R-98-009." "October 1, 1998." Bibliographic references included.