00450682

Component

http://onlinepubs.trb.org...s/trr/1984/995/995-002.pdf

https://scholar.google.co...rson&publication_year=1984

Septic tank systems are used at 50 percent of roadside rest areas in the United States for onsite disposal of wastewater generated from restrooms and from recreational vehicle waste holding-tank dump stations. The percolation test aids the sizing of septic tank leach fields by determining the percolation value for the soil, an index of the rate of seepage of water into the soil. The widely used Public Health Service percolation test procedure defines many aspects of the test, though some details are either discretionary or broadly defined. Comparative percolation tests were conducted to determine whether factors permitted to vary in the Public Health Service procedure could affect test results. Such factors investigated were: (a) test hole cross-sectional size; (b) method of excavation of test hole; (c) surface preparation of test hole; and (d) protection of interior surface of test hole. Based on findings of these comparative tests, certain precautions during testing are recommended to eliminate some causes of variation in test results, and a calculation is developed for adjusting raw data from percolation tests for the particular size of the test hole used. An improved percolation test method is proposed.

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. Publication of this paper sponsored by Committee on Hydrology, Hydraulics, and Water Quality.

00450954

HS-038 995

pp 11-19

1984

Transportation Research Record

0309038049

Print

Figures (4) ; Maps (1) ; Photos (17) ; References (10) ; Tables (4)

Leaching; Percolation; Seepage; Septic tanks; Soil tests; Test procedures; Wastewater

Design; Environment; Highways; Hydraulics and Hydrology; Planning and Forecasting; I21: Planning of Transport Infrastructure

TRIS, TRB

Feb 28 1986 12:00AM

• ICE JAMS AT HIGHWAYS AND BRIDGES--CAUSES AND REMEDIAL MEASURES
• IOWA DESIGN MANUAL FOR LOW WATER STREAM CROSSINGS
• ONSITE DISPOSAL OF RESTROOM AND RECREATIONAL VEHICLE WASTES
• SEMI-ARID STORM HYETOGRAPH PROPERTIES IN WYOMING
• THE EFFECTIVENESS OF STORMWATER DETENTION
• TREATABILITY OF RECREATIONAL VEHICLE WASTEWATER IN SEPTIC SYSTEMS AT HIGHWAY REST AREAS