Celatom Mine Plan of Operations
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Biogenic Composite Filaments Based on Polylactide and Diatomaceous Earth for 3D Printing
materials Article Biogenic Composite Filaments Based on Polylactide and Diatomaceous Earth for 3D Printing Marta Dobrosielska 1, Robert Edward Przekop 2,*, Bogna Sztorch 2, Dariusz Brz ˛akalski 3, Izabela Zgłobicka 4 , Magdalena ٞepicka 4, Romuald Dobosz 1 and Krzysztof Jan Kurzydłowski 4 1 Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska, 02-507 Warsaw, Poland; [email protected] (M.D.); [email protected] (R.D.) 2 Centre for Advanced Technologies, Adam Mickiewicz University in Pozna´n,10 Uniwersytetu Pozna´nskiego, 61-614 Pozna´n,Poland; [email protected] 3 Faculty of Chemistry, Adam Mickiewicz University in Pozna´n,8 Uniwersytetu Pozna´nskiego, 61-614 Pozna´n,Poland; [email protected] 4 Faculty of Mechanical Engineering, Bialystok University of Technology, 45C Wiejska, 15-351 Bialystok, Poland; [email protected] (I.Z.); [email protected] (M.Ł.); [email protected] (K.J.K.) * Correspondence: [email protected] Received: 11 September 2020; Accepted: 13 October 2020; Published: 16 October 2020 Abstract: New composites containing a natural filler made of diatom shells (frustules), permitting the modification of polylactide matrix, were produced by Fused Deposition Modelling (3D printing) and were thoroughly examined. Two mesh fractions of the filler were used, one of <40 µm and the other of 40 63 µm, in order to check the effect of the filler particle size on the composite − properties. The composites obtained contained diatom shells in the concentrations from 0% to 5% wt. (0 27.5% vol.) and were subjected to rheological analysis. -
Dhamori Village Development Plan
This presentation premiered at WaterSmart Innovations watersmartinnovations.com Translating Historical Water Wisdom to Contemporary Challenges Leslie A. Johnson, 2018 MLA Capstone Chair: Professor John Koepke Department of Landscape Architecture, University of Minnesota Project Advisor: Alpa Nawre, University of Florida Agenda 1. Contemporary Issues in India & the Relationship to Traditional Water Management 2. Site Visit to Dhamori, India & Project Background 3. Water Wisdom: Capstone Research & Design 4. Lessons Learned & Broader Applications Image Credit: Dhamori Village - Leslie A. Johnson Part I. Contemporary Issues in India & the Relationship to Traditional Water Management India today faces a wide variety of social, environmental, and cultural issues related to water issues. • Conflicts between domestic and productive water use • Farmer suicides in rural communities Image Credit: Maharashtra Farmer during Drought - Jagadeesh NV, European Press Photo Agency / Relocated Workers - “Drought in Maharashtra,” Mumbai Mirror / Farmer Suicides - India You, 2011 Part I. Contemporary Issues in India & the Relationship to Traditional Water Management • Threats to food security • Seasonal migration to cities • During the monsoon, there can be too much water, but during the dry season, there can be too little Challenges stem from water mismanagement as much, or more so, as from water scarcity. Yet India has a rich history of water conservation strategies, so how is it that these current issues came to be? Image Credit: In wait for water - Mumbai Mirror / Stepwell – Atlas Obscura Part I. Contemporary Issues in India & the Relationship to Traditional Water Management What is ”traditional water management?” Broadly, water systems present prior to industrialization, specifically those systems derived from the vernacular of their landscapes and needs of a particular group of people. -
Full Document (Pdf 1196
Final Report GeoEngineers On-Call Agreement Y-7717 Task Order AU AN APPROACH FOR ESTIMATING INFILTRATION RATES FOR STORMWATER INFILTRATION DRY WELLS by Joel Massmann, Ph.D., P.E. Washington State Department of Transportation Technical Monitor Glorilyn Maw Washington State Transportation Commission Department of Transportation and in cooperation with U.S. Department of Transportation Federal Highway Administration April 2004 TECHNICAL REPORT STANDARD TITLE PAGE 1. REPORT NO. 2. GOVERNMENT ACCESSION NO. 3. RECIPIENT'S CATALOG NO. WA-RD 589.1 4. TITLE AND SUBTITLE 5. REPORT DATE AN APPROACH FOR ESTIMATING INFILTRATION April 2004 RATES FOR STORMWATER INFILTRATION DRY WELLS 6. PERFORMING ORGANIZATION CODE 7. AUTHOR(S) 8. PERFORMING ORGANIZATION REPORT NO. Joel Massmann, Ph.D., P.E. 9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT NO. 11. CONTRACT OR GRANT NO. Agreement Y7717, Task AU 12. SPONSORING AGENCY NAME AND ADDRESS 13. TYPE OF REPORT AND PERIOD COVERED Research Office Final Research Report Washington State Department of Transportation Transportation Building, MS 47372 Olympia, Washington 98504-7372 14. SPONSORING AGENCY CODE Keith Anderson, Project Manager, 360-709-5405 15. SUPPLEMENTARY NOTES This study was conducted in cooperation with the U.S. Department of Transportation, Federal Highway Administration. 16. ABSTRACT This report describes an approach for estimating infiltration rates for dry wells that are constructed using standard configurations developed by the Washington State Department of Transportation. The approach was developed recognizing that the performance of these dry wells depends upon a combination of subsurface geology, groundwater conditions, and dry well geometry. The report focuses on dry wells located in unconsolidated geologic materials. -
City of Bend Oregon Standards and Specifications
CITY OF BEND OREGON STANDARDS AND SPECIFICATIONS TABLE OF CONTENTS Division Title Page Contents ......................................................................................................i DEVELOPMENT PROVISIONS ................................................................ 1-22 DESIGN STANDARDS ............................................................................. 1-52 GENERAL CONDITIONS ......................................................................... 1-32 CONSTRUCTION INSPECTION SERVICES ................................................ 1-3 STANDARD SPECIFICATIONS II STREETS AND RELATED WORK ................................................................ 1-27 Grading Ordinance Drawings 1-1 to 1-5 Additional Street-related Drawings 2-1 to 2-15 III SEWER FACILITIES ................................................................................. 1-24 Drawings 3-1 to 3-15 IV WATER FACILITIES ................................................................................. 1-24 Drawings 4-1 to 4-21 V STRUCTURES .......................................................................................... 1-5 VI LANDSCAPE AND IRRIGATION ................................................................... 1-40 Drawings 6-1 to 6-9 i DEVELOPMENT PROVISIONS September 2004 CONTENTS Section Title Page 01 INTRODUCTION ................................................................................... 1 02 RULES ............................................................................................... 1 03 PLAN & SPECIFICATIONS -
Diatomite in 1998
DIATOMITE By Lloyd E. Antonides1 Domestic survey data and tables were prepared by Shantae Hawkins, statistical assistant, and the world production table was prepared by Glenn J. Wallace, international data coordinator. Diatomite is a chalk-like, soft, friable, earthy, very fine- called tests); but mention of such deposits is not very common grained, siliceous sedimentary rock, usually light in color in the literature. Tripoli is often also confused with tripolite (white if pure, commonly buff to gray, and rarely black). It is (i.e., diatomite) because it is also a lightweight, light-colored, very finely porous, very low in density (floating on water at very friable, very porous sedimentary rock that is a weakly least until saturated), and essentially chemically inert in most consolidated aggregate of particles, but the particles are liquids and gases. It also has low thermal conductivity and a individual microcrystals of quartz rather than diatom shells. rather high fusion point. Diatomaceous earth and simply Also, tripoli is heavier and less absorbent than diatomite. “D.E.” are common alternate names but they are more Known U.S. deposits of tripoli (and the very similar appropriate for the unconsolidated or less lithified sediment; “microcrystalline silica”) occur in Paleozoic or older (more many sediments and sedimentary rocks are somewhat than 240 million years old) limestones that contain chert layers diatomaceous. The deposits result from an accumulation in obviously related to tripoli (Berg and Steuart, 1994, p. 1091- oceans or freshwater of amorphous silica (opal, SiO2··nH2O) 1095) and may have originally been diatomite deposits comprising the cell walls of dead diatoms, which are (Thurston, 1978, p. -
Diatomaceous Earth: Advantages and Limitations
Proceedings of the 7 th Iniernaiumal Working Conference on Stored-product Protection, - Volume 1 Diatomaceous earth: Advantages and limitations Paul G. Flelds1 Abstract into one of two categones. One, msecncides have negatrve effects on non-target orgamsms Insect parasites and The gram industry needs to reduce Its reliance on synthetic predators, which would normally keep pest insect pesticides because of insecticide deregulation, resistant populations in check, can be killed by insecticides. Also populations and consumer concerns over msecticide insecticides can be tOXICto fish, birds, or mammals. Some residues, DIatomaceous earth (DE )-based msecticides are msecncides (eg. malatluon, chlorpynfos-methyl, fmdmg increased use as stored commodity protectants pmmrphos-methyl or deltamethnn; Snelson, 1987; Whrte, because of these concerns DE IS obtained from geological and Leesch, 1995) used to control stored-product insects deposits of diatomite, which are fossihzed sedimentary must be applied directly to the gram, and therefore residues layers of rmcroscopic algae called diatoms, DE, made up can be mgested by consumers. GIven that the effects mainly of SI~, works as an msecticrde through physical consuming low levels of msecticide residues for many years mechamsms. The fme DE dust absorbs wax from the insect cuticle, causing death due to desiccation. are unknown and effects may only appear after years of exposure, there IS a desire to have foods free of pesticide The main advantages of DE are ItS lOw-tOXICIty to mammals and ItS stability. However, several problems hmrt residues. Two, the WIdespread use of a single insecticide or Its WIdespread use: reduction of the bulk densrty and a class of msecticide can lead to resistance with the pest flowabhty of grain, dusty to apply, low efficacy against populations (Subramanyam, 1995) some msects and reduction m efficacy at high moisture These two factors have caused a reducnon m the number contents. -
WALLY THARP and the DIATOMACEOUS EARTH SCENE INTERVIEW: Diatomaceous Earth Has Been Around - Commercially Speaking - at Least As Long As the Eco- Farming Movement
Page 1 of 13 ACRES, U.S.A. - A VOTE FOR ECO-AGRICULTURE - JANUARY 1990 WALLY THARP AND THE DIATOMACEOUS EARTH SCENE INTERVIEW: Diatomaceous earth has been around - commercially speaking - at least as long as the eco- farming movement. In this interview, Wally Tharp tells about the background of this fantastic gift of nature. He also covers his own biography, hence a paucity of notes in this introduction. When people ask Wally Tharp where they can find him, he tells them to look it up in Acres U.S.A., where he always carries a commercial message. His phone is 505-247-3999, and he is willing to send literature, products or talk, the last as long as anyone is there to listen. With these things in mind, here was our opening question. ACRES U.S.A. Mr. Tharp, we reported on diatomaceous earth in ACRES U.S.A. maybe 18 or 20 years ago. The product comes and goes. One company after another tries to make a go of it, and you seem to be the first one to look like you have some staying power. Are you a Svengali? Is this an illusion? Will diatomaceous earth go away again? Tharp. It so happens that this is the second time I have successfully marketed the product. I went to work as an independent contractor with the original produce of DE - Phoenix Gems - which was having a rough financial time. The record will show that within 90 days, things began to turn around and within three years we were moving over a million and a half dollars worth per month and had distributors in 44 states. -
Single Family Residential Stormwater Management Plan Dry Well (Infiltration) Construction Inspections
Single Family Residential Stormwater Management Plan DRY WELL (INFILTRATION) Definition : A dry well is an excavated pit filled with gravel and sand that provides temporary storage of runoff from roofs and allows for infiltration of that runoff over a 48 hour period. Constraints : • Dry wells should not be used in areas where their operation may create a risk for basement flooding, interfere with septic sewage disposal systems, or cause downslope seepage problems • May not be installed on slopes greater than 20% • Drainage area to each dry well shall not exceed 1000 square feet • Dry wells may not be used in HSG D or if the infiltration rate of the soil is less than 0.27 inches per hour • Dry wells are intended to capture rooftop runoff only Design Guidance: • Dry wells must be installed in accordance with the attached detail • Dry wells should not intercept water table, bedrock, fragipan or other confining layer • Dry wells must be located down gradient of building structures and set back at least 10 feet from buildings, 50 feet from water supply wells and 25 feet from septic systems • Dry wells must be set back at least 50 feet from fill slopes of 25% or steeper • Soils will be evaluated during excavation by ASCD representative to evaluate soil suitability assumed in original design which may alter type of practice to be constructed Installation: • Minimize compaction of dry well bottom and sidewalls • Collection pipes from downspouts shall be 4”-6” PVC installed at min. slope of 1% • The bottom of the dry well excavation should be -
Part 629 – Glossary of Landform and Geologic Terms
Title 430 – National Soil Survey Handbook Part 629 – Glossary of Landform and Geologic Terms Subpart A – General Information 629.0 Definition and Purpose This glossary provides the NCSS soil survey program, soil scientists, and natural resource specialists with landform, geologic, and related terms and their definitions to— (1) Improve soil landscape description with a standard, single source landform and geologic glossary. (2) Enhance geomorphic content and clarity of soil map unit descriptions by use of accurate, defined terms. (3) Establish consistent geomorphic term usage in soil science and the National Cooperative Soil Survey (NCSS). (4) Provide standard geomorphic definitions for databases and soil survey technical publications. (5) Train soil scientists and related professionals in soils as landscape and geomorphic entities. 629.1 Responsibilities This glossary serves as the official NCSS reference for landform, geologic, and related terms. The staff of the National Soil Survey Center, located in Lincoln, NE, is responsible for maintaining and updating this glossary. Soil Science Division staff and NCSS participants are encouraged to propose additions and changes to the glossary for use in pedon descriptions, soil map unit descriptions, and soil survey publications. The Glossary of Geology (GG, 2005) serves as a major source for many glossary terms. The American Geologic Institute (AGI) granted the USDA Natural Resources Conservation Service (formerly the Soil Conservation Service) permission (in letters dated September 11, 1985, and September 22, 1993) to use existing definitions. Sources of, and modifications to, original definitions are explained immediately below. 629.2 Definitions A. Reference Codes Sources from which definitions were taken, whole or in part, are identified by a code (e.g., GG) following each definition. -
Infiltration Trench & Soakaway
An Infiltration Trench System includes an inlet pipe or water source, catch basin sump, perforated DESIGN PRINCIPLES distribution pipe, infiltration trench and overflow to the storm drainage system. ■ Infiltration Trench System: A Soakaway Manhole (Sump, or Dry Well) System includes an inlet pipe, a sedimentation manhole, and one or more infiltration shafts with connecting pipes. Use of Infiltration Shaft will be limited by hydro- a) Locate infiltration trench at least 3m geotechnical conditions in much of GVRD. from any building, 1.5m from Limitations of Infiltration Trench or Soakaway Manholes: property lines, and 6m from adjacent a) To avoid groundwater pollution, do not direct un-treated polluted runoff to Infiltration Trench or Shaft: infiltration facilities (or as recommended by a geotechnical ▪ Direct clean runoff (roof, non-automobile paving) to Infiltration Trench or Shaft. engineer). ▪ For polluted runoff (roads > 1000 vehicles / day, parking areas, other pollution sources), provide upstream source control for pollutant reduction prior to release to Infiltration Trench or Shaft. b) Sump: Provide a lid for periodic b) Use infiltration trench or shaft only in areas with footing drains. inspection and cleanout. Include a 1. Grass or Other Planting T-inlet pipe to trap oils, sediments 2. Finish Grade and debris. 3. Growing Medium Backfill 4. 100mm Dia PVC DR28 Perforated 19 c) Infiltration Trench: installation of Pipe distribution pipe and bottom of 5. Light Non-woven Polyester drainrock to be level. If more than Geotextile c/w Min. 400mm Laps one section of infiltration trench is 9 1 required, design so that underground 6. 50mm Drain Rock or Rock of water is temporarily ‘ponded’ in each Equal Porosity infiltration section. -
Philadelphia Stormwater Manual V2.1 Philadelphia Stormwater Manual V2.1 This Pageintentionallyleftblank Simplified Approach Design Criteria Rooftop Systems
7 Stormwater Management Practice Design Guidelines 7.1 Green Roofs 7.2 Rain Barrels and Cisterns 7.3 Filter Strips 7.4 Filters 7.5 Bioinfiltration / Bioretention 7.6 Detention Basins 7.7 Berms and Retentive Grading 7.8 Swales 7.9 Constructed Wetlands (see PA Stormwater BMP Manual) 7.10 Ponds & Wet Basins (see PA Stormwater BMP Manual) 7.11 Subsurface Vaults 7.12 Subsurface Infiltration 7.13 Porous Pavement 7.14 Pre-fabricated and Proprietary Designs (see PA Stormwater BMP Manual) 7.15 Inlet and Outlet Controls Philadelphia Stormwater Manual v2.1 This Page Intentionally Left Blank Philadelphia Stormwater Manual v2.1 Simplified Approach Design Criteria Rooftop Systems This section provides the following information about eco-roofs and roof gardens: S Typical cross section S Description S General specifications S Checklist of minimal information to be shown on the permit drawings S Construction inspection requirements and schedule S Link to landscaping requirements S Link to example landscaping plans S Link to operation and maintenance requirements S Link to photos 7.1 S Link to drawings 7.1 S Eco-roof Central City F.A.R. bonus guidelines Green roofs (vegetated roof/eco roof/roof garden) consist of a layer of vegetation that completely covers an otherwise conventional flat or pitched roof. The hydrologic response of a green roof bears closer resemblance to a lawn or meadow than impervious surface. The green roof system is composed of multiple layers including waterproofing, a drainage City of Portland, OR layer, engineered planting media, and specially selected plants. Vegetated roof covers can be optimized to achieve water quantity and quality benefits. -
City of Elk Grove Dry Well Project Guidance and Lessons
City of Elk Grove Dry Well Project Guidance and Lessons Learned Document 2/28/2017 CITY OF ELK GROVE DRY WELL PROJECT Guidance Document Guidance and Lesson Learned from the Elk Grove Dry Well Project The Elk Grove Dry Well Project (project) was a four-year study to investigate the risk of groundwater contamination associated with the use of infiltrating stormwater through dry wells. The project involved a large field component that included the installation of two dry wells with pretreatment and a network of groundwater monitoring wells. The project has two study sites located in Elk Grove, California. The first site was the City of Elk Grove’s Corporation Yard, a 0.6-acre parking facility that is a bus fleet servicing area and maintenance yard, and the second site was the Strawberry Detention Basin, a water quality basin that collects stormwater from a 168-acre residential neighborhood. As part of the project study, stormwater and groundwater samples were collected for two years and analyzed for over 200 contaminants. Estimates of infiltration rates were also made. A companion modeling study of the fate and transport of contaminants through the vadose zone was performed. Scientific and government reports evaluating the risk to groundwater quality associated with dry well use were reviewed and compiled in a literature review (annotated bibliography). Lastly, information from other states with developed dry well programs, often known as underground injection control systems, was summarized in fact sheets with the goal of understanding the regulations, permitting, siting, and design guidelines used elsewhere. This guidance document summarizes some of the key lessons learned from this work.