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RECORD NUMBER: 492 OF 1150

OLS Field Name OLS Field Data
Main Title Investigation of Techniques to Provide Advance Warning of Ground-Water Pollution Hazards with Special Reference to Aquifers in Glacial Outwash.
Author Crosby, II, James W. ; Johnston, Donald L. ; Fento, Robert L. ; Drak, Charles H. ; Purve, William J. ;
CORP Author Washington State Univ., Pullman. Coll. of Engineering Research Div.
Year Published 1971
Report Number OWRR-B-005-WASH; 00358,; B-005-WASH(5)
Stock Number PB-203 748
Additional Subjects ( Aquifers ; Water pollution) ; ( Water pollution ; Sewage) ; ( Ground water ; Water quality) ; ( Septic tanks ; Hydrogeology) ; Washington(State) ; Sewage treatment ; Irrigation ; Pesticides ; Herbicides ; Agricultural wastes ; Sampling ; Fertilizers ; Fluid infiltration ; Spokane(Washington)
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Library Call Number Additional Info Location Last
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Status
NTIS  PB-203 748 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 208p
Abstract
Findings are recorded of a six-year investigation of pollution hazards involved with the use of septic tanks and drainfields in the Spokane Valley of eastern Washington. The geological setting of the study area was investigated by gravimetric and refraction seismic methods. The results of these studies indicated a generally simple, U-shaped valley incised in ancient granitic and metamorphic rocks. Valley fill materials appear to be almost entirely glaciofluvial sands and gravels. Previously postulated basalt flows and Latah clays are probably not present in significant amounts. Drilling and sampling of local drainfields revealed that the upper moist and wet valley fill materials pass into dry sands and gravels at depth. This phenomenon prompted a postulate that drainfield fluids must be moving laterally rather than vertically. Confirmatory laboratory measurements of soil moisture tension showed all of the soils, at depth, to be in a state of high moisture deficiency. Routine geophysical logging of monitor wells indicated that moisture movement and variations were confined to upper soil layers. Infiltration tests substantiated other findings concerning the movement of soil moisture. Extensive sampling and analysis of surface and ground waters revealed no evidence of ground-water contamination. Surface waters are generally of good quality east of Spokane but are seriously degraded in the immediate Spokane area. (Author)