Download or read book Suitability of Limestone derived Soils for On site Wastewater Disposal written by John Joseph Simon and published by . This book was released on 1986 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Limestone-derived soils comprises large partes of the Great Valley of Virginia as well as other parts of the United States and world. Previous researchers proposed relatively low application rates for septic tank effluent (STE) to clayey subsoils of glacial origin but much higher rates of applicatio have been noted to be suitable in some but not all clayey soils developed in limestone residuum. Additional questions heve also been reised about the potential for pollution of groundwaters by nitrate (NO3 -N) formation from de ammonium by the Virginia State Board of Health in 1982 provided for effluent loading rates to be determined either by the soil texture or the percolation rate but did not take into account soil structure or the protential for leaching of NO3 -N to groundwaters. The porpuse of this work was to (1) test the hypothesis that clayey, well drained soils are suitable for septic tank subsurface absorption systems (ST -SAS) if low pressure distribution (LPD) of STE is used; (2) determine approximate loading rates for soils with different grade, size, and type of structure, and depths to restrictive layers; (3) determine the extent of nitrification in clayey limestone-derived soils below ST -SAS in which effluent was (a) ponded and (b) not ponded. Results of this study indicate that clayey soils developed in limestone residuum are suitable for disposal of STE. Where the soil structure is weak blocky to massive but soil colors indicate god drainage, flux densities of 0,5 cm d-1 may be suitable with LPD. ST -SAS installed in fine textured soils with 15 to 30 cm of soil with moderate to strong blocky structure beneath them may be dosed at 1 cm d -1. Where more than 60 cm of soil with strong structure but no other apparent restrictions underlies a ST -SAS, loading rates of 2 to 3 cm -1 may be suitable. Presence of>25% coarse fragments in otherwise well structured soils may result in lower effluent acceptance rates, hence a maximun rate of 1 to 2 cm c -1 may be suitable iln these soils depending on other soil properties. If effluent is continually ponded in ST -SAS, nitrification may be minimal. However, nitrification was predominant below sT -SAS which were not continously ponded and below trenches which were rested. Concentrations>60 mg L -1 of NO-3 may be present in water leaving the immediate trench bottom area below ST -SAS. The density of ST -SAS placement and loading rate should be determined in part by the area required to dilute NO3 concentrations to de U.S. Public Health Service standards of 10 mg L-1.
Download or read book Site Characterization and Design of On site Septic Systems written by M. S. Bedinger and published by ASTM International. This book was released on 1997 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On site Wastewater Treatment written by American Society of Agricultural Engineers and published by . This book was released on 1994 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Denitrification in Onsite Wastewater Treatment and Disposal Systems written by and published by . This book was released on 1991 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Operation of Small Wastewater Treatment Plants written by Hallvard Ødegaard and published by Elsevier Science & Technology. This book was released on 1994 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of papers on the various technologies that may be used in the design and operation of small wastewater treatment plants. The topics covered include: activated sludge and biofilm reactors, constructed wetlands and ponds, infiltration and soil filter systems.
Download or read book Sand Mountain Region On site Sewage Pollution Wastewater Disposal Site Dekalb County written by and published by . This book was released on 1998 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Check list of Virginia State Publications written by and published by . This book was released on 1987 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1989 with total page 1130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1987 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Checklist of State Publications written by Library of Congress. Exchange and Gift Division and published by . This book was released on 1987-05 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt: June and Dec. issues contain listings of periodicals.
Download or read book Sewage Facilities Plan written by Bucks County Planning Commission and published by . This book was released on 1978 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Research written by and published by . This book was released on 1993 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cahaba River Wastewater Facilities Jefferson County written by and published by . This book was released on 1979 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance and Upgrading of Wastewater Stabilization Ponds written by E. Joe Middlebrooks and published by . This book was released on 1979 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
