what is the specification of fabric filter for drainage pipe trench?
91533
you use mirifi 140-n filter fabric
622897
You'll have to look up ASTM standards for exfiltration or pressure testing for manholes (structures) and for pipes.  Pricing usually comes with installation & cost of materials.  Pricing can depend on depth of pipe, material of pipe, and size of pipe.
565548
Right here:\n\nhttp://www.phila.gov/li/codes/PlumbingCode.pdf\n\nHappy reading.
290493
Hole \nThe “hole’’ must be 41/4 inches (108 mm) in diameter and at least 4 inches (101.6 mm) deep. If a lining is used, it must be sunk at least 1 inch (25.4 mm) below the putting green surface unless the nature of the soil makes it impracticable to do so; its outer diameter must not exceed 41/4 inches (108 mm).
1141215
Here are a couple of resources for you:\nMetyx makes high quality Woven fabrics and Univar should be able to supply the resins etc.
668853
Stages\n1+2 Carbon block filter\n3+4 Reverse Osmosis 1st purifier \n5+6 Deionization 2nd + 3rd purifier\n7   Stainless stell ultraviolet light\n9+10 Reprogramming erasing memoery\n11- reprogramming adding natural mineral properties\n12- reprogramming adding natural earth properties\n13- reprogramming natural flow form, surface tension lowered\n14, 15,16- Calcium, magnesium Re-mineralization
248113
They don't say what they are because you are suppose to get a copy of B31.9 and follow its requirements. \n\nB31.9 can change from time to time and this way the specification is always current. If the specification spelled out B31.9 and then quoted the requirements and they had changed in the mean time there would be a conflict.\n\nI have written many specifications for piping and this is the only way to be sure B31.9 or other industry standards are met.
612146
Some info at http://www.aquapurefilters.com/contaminates/165/toc.html and at http://www.stateoftheart.it/toc-2.htm
767516
http://envfor.nic.in/divisions/ic/wssd/doc1/chap6/da_page_6_5.htm
876422
First layer should be polypropylene then the next layer should be wool the polypropylene will repel water away from your feet the wool will act like an insulator
152308
Without more information; such as the size of the job and what type of trenching. I can only give you two words; TIME & MATERIALS
1040513
To keep our used water from spoiling our water resources, we have to remove the pollutants before the water gets back into the environment. In urban areas in most developed countries, the wastewater from homes, businesses and factories is collected by a system of underground pipes-- sewers-- which carry it to one or more central treatment facilites. Most of these are located near bodies of water into which the treated wastewater is discharged. \n\nIn the U.S., all such facilites must have a permit issued by the federal and/or state government, describing limits on the amounts of various pollutants which may be discharged. The U.S. EPA (Environmental Protection Agency) refers to these as NPDES (National Pollutant Discharge Elimination System) permits. Industries located in areas where they are not connected to a sewer can discharge directly into a waterway, but will need a permit, and will probably have to have their own treatment plants. Even industries which are connected to sewers may have to pretreat their wastewaters before discharging them into the sewers, because they may contain materials which will harm the sewers or the treatment plants-- or may be a danger to the people who work in maintaining the sewer system.\n[If you are some one who works in an industrial pretreatment program, you may be aware that the USEPA has recently (July 22, 1999) proposed a series of changes to the current regulations. I have prepared a summary of the proposals which you may find helpful before reading the entire document.] \n\nHomes in non-urban areas that are not connected to a sewer are usually required by their town to have on-site treatment systems. Most common for single homes are septic systems, which consist of a buried tank connected to a set of perforated pipes, embedded in gravel, which distribute the water into the soil. (The "Links" page has several references on this subject.) Larger housing complexes may have treatment systems based on the principles used in full-scale sewage treatment plants. \n\n\nA Word About Sewers: Besides having a set of sewer pipes-- called, strangely enough, sanitary sewers-- which carry wastewater to a treatment plant, cities and towns also need pipes to collect stormwater. These are needed to prevent street flooding and usually lead directly to a waterway without any treatment. The runoff of pollutants from streets and yards into these storm sewers contain oil and other automotive wastes, which may contain toxic metals and organic compounds-- as well as pesticides and nutrient-containing fertilizers from lawns and gardens, and pathogenic microorganisms from animal wastes. The problem of pollution from storm sewers is currently being addressed by the USEPA. Further complicating the situation is the fact that while some cities and towns have completely separate sanitary and storm sewer systems, many others have combined systems. During rainy periods, combined sewers cause two problems: overloading of the treatment plant with extra water and contaminating waterways with untreated sewage from overflows. Even in cities with separate sewer systems, the flows to the treatment plants often increase greatly when it rains because of cracks or separations in the pipes, which allow groundwater or stormwater from broken storm sewer pipes to infiltrate into the sanitary sewer-- or from direct inflow of stormwater into manholes and from illegal connections of roof drains and sump pumps in buildings.*
194795
it keeps water away from the contact with the ground
346249
A catch basin or concrete structure underground with a steel grate on top that is used for draining and transporting storm water
488410
You can describe different types:\n\nhttp://www.aecom.yu.edu/ehs/Industrial%20Hygiene/Fs_Fibergls.htm\n\nhttp://www.clarkcraft.com/fiberglasscovering.php3
916755
Here you go\nhttp://www.pcguide.com/proc/physinst/sink-c.html\n\n///
195474
A number of stages is necessary:\n\n1. Filtration - To remove particles, can be any filter.\n2. Odor removal - Use charcoal\n3. Ultraviolet treatment - To kill most germs\n4. Reverse osmosis