PRELIMINARY REPORT ON REQUIREMENT FOR WATER SUPPLYSEWERAGE AND DRAINAGE FOR THE PROPOSED OF SPECIFICELECTRONIC /IT /ITES SPECIAL ECONOMIC ZONE VILLAGESIKOHPUR TEHSIL SOHNA DISTT. GURGAON.GENERAL:Total Plot Area : 70 Acres. The It is proposed to develop Residential, Commercial, Institutional, Electronic IT Centre etc. in theabove area approximate proposed area of various activities is as under:Sl. Type of Area in Built up Basis of TotalNo. Development Acres Area in Sqft. Population Population 1. Residential 50% of 17.50 13,22,000 Considering 880x5= 35 acres average unit area of 1500 4400 Sqft. With 5 occupants2. Commercial 15% of 5025 4,00,000 Table 20 of 6196 35 acres NBC Occupant load 6 Say: 6200 Sqm/person or (64.55 Sqft) 3. Institutional 5% of 1075 1,40,000 Table 20 of 836 35 acres NBC Occupant load 15 Say: 6200 Sqm/person or (167.4 Sqft.)4. IT Park etc. 10.50 7,73,000 NBC Occupant 7184 load 10 30% of 35 acres Sqm/person or Say: 7200 (107.6 Sqft)5. Processing 35 Acres 38,11,500 Table 20 of 30,000 NBC Occupant load 12 Say: 30,000 Sqm/person or (129.1 Sqft.) TOTAL 70 Acres 64,46,500
WATER SUPPLY:Domestic water required per head per day as per National Building Code 2005, Table 1, Part 9, and P19, Plumbing services:a) Residential : 150 Litresb) Commercial : 45 Litresc) Institutional : 45 Litresd) Factories/IT parksWith no Bathroom : 30 LitresTotal Water requirement:a) Residential : 4400x150 = 6, 60,000 Litres or 660 KLb) Commercial & Institutional(6200+840+30000=37040) : 37000X45 = 16, 65,000 Litres or 1665 KLSay: 37,000c) IT parksWith no Bathroom : 7200X30 = 2, 16,000 Litres or 216 KL_____________2541 KLSay : 2550 KLIn addition to daily domestic requirement water will be required for Horticultural proposes considering20% green area – 14 acresWater required for Horticultural : 14 X 28000 = 3,92,000 Litres or 392 KLGrand Total : 2550+392 = 2942 KL Say: 2950 KLSources of water : Three Sources of water are considered as under:City Supply from Govt./Local Authority.Development of deep Tube wells at site.Recirculation of treated sewerage effluent after Tertiary treatment of Horticultural & Flushing proposesfor urinals and water closets.
City supply will be supplying water to the complex when it is available from the local authorities.Development or Tube well : A detail Geophysical survey of the site was got5 done through M/s Thereliable water supply Service of India (P) Ltd. new Delhi at there different point. The water / Aquifer isavailable 27-65 Mtr. Depth with expected field of 1000-12000 LPH (Report Attach). Considering adischarge of 10,000 – 12,000 Litres/hr and working for 12 hr. per day. Expected discharge for one tube well : 12000 x 12 = 1,44,000 Litres or 180 KL Number of tube well of required : 2950 / 144 = 20.48 Nos.Available water from Horticultural & flushing purpose. C) Recirculation of Sewerage Effluent : 80% of water supply will flow as Sewerage. = 0.80 x 2550 KL = 2040 KL Say : 2040 KL Horticultural water required per day Flushing water required per day: a) Residential flushing requirement = 4400 x 50 Litres/head/day = 220 KL b) Commercial Flushing requirement = 42465 x 15 Litres/head/day = 637 KL c) IT Park flushing requirement = 7200 x 15 Litres/head/day = 108 KL _________________ 1357 KL _____________________ Say : 1360 KLBalance treated sewage effluent will be recharge to Ground= 2040 - 1360 = 680 KLTherefore actual no. of Tube wells required = (2250-1360) = 1190 Nos. 1190 say 8.26 Nos.________ 144Provide 20% as stand by = 8.26 + 1.65 = 9.81 say : 10 Nos.Total No. of Tube wells required: 10 Nos. Till city supply 9s available at full development of site.STORM WATER DRAINAGE:
The total rainfall in the area as per table 1 rainfall data from major cities by Indian metrologicalDevelopment is 794 mm as per Rain Water Harvesting and Conservation manual.Total rain water based on anove basis per year considering 80% of rainfall recharging the ground watertable.X 40000 X 0.794 X 0.90 = 2,00,088 KL per yearThis rain water is completely recharged to ground water by providing 20-25 rain water harvesting well,each rain water harvesting well will cover an area of approximately 3 acres.Total recharge from rain water per year = 2, 00,088 KLSewerage treatment plant effluentRecharged to ground water per year = 365 X 680 = 2, 48,200 KL________________________4, 48,288 KL__________________________Say : 4, 50,000 KLTotal water withdrawal from ground water by developing tube wells per year= 1190 X 365 = 4, 34,350 KLThus there is no effect on Ground water table in the area as water recharge and withdrawal are almostequal. Detail of Rain Harvesting well and sewage treatment plant are attached.RAIN HARVESTING WELLSThe total site of 70 acres will be divided into small pockets varying from 2.5-4 acres depending uponlayout. Each pocket will have independent harvesting well. The rain water from roofs will be takendown through vertical stacks. The sizing will be as per national Building Code Table No. 28 part -9Section 2 Pages -70. The vertical drain pipe will be connected to manhole at ground level. Manholewill be interconnected and finally taken to harvesting well. A desilting chamber will be provided todesilt and remove floating material through bar screen. The overflow will lead to chamber having filtermedia of coarse sand 1.5 to 2mm. Gravel 5-10 mm and boulders 5-20mm with minimum 300mm thickeach layer/ One deep bore up to sub soil water table will be drilled and 160mm PVC 3mm perforatedpipe will be installed up to sub soil water table with P – Gravel around the pipe. The solid pipe will beprovided between filtering media and ground level to clean in case of blockage through AirCompressor etc. The schematic diagram is attached.Working of Sewerage Treatment Plant:
The complex will be decided into four – five zones and sewage under ground plants will be on 80% ofwater supply rate. . Incoming sewage is at a level of 4-5m depth from ground. This is collected in anincoming sump which has a screen fixed at the entry of the sump. A cat ladder and manhole is providedfor maintenance point of view. Two automatic sewage submersible pumps are provided to lift the liquidto grease chamber and then to tube settler system with level control or ensuring automatic operation.And than to aeration tank the sewage undergoes aeration and subsequent attached growth. This resultsin increased aerobic suspended growth and attached growth systems. From aeration tank the effluentover floors to clarifier for setting solid & the tanked effluent to tank and than pumped to filter.Sewerage is collected in an incoming sump which has a screen fixed at the entry of the sump. A catladder and manhcle is provided for maintenance point of view. Two automatic sewage submersiblepumps are provided to transport liquid to the bio-reactor system with level control for ensuringautomatic operation. The incoming sewage is lifted to the bio- reactor system.Further treatment in the form of Tertiary treatment through Filter Vessels is done. Before feeding waterto Filter vessels, slight dose of chlorine is added to stream and water is passed on the twin set offaesthetically designed Pressure sand filter and Activated Carbon filter.Whereas Pressure Sand filter removes very fine suspended particles in the Discharge Stream, ActivatedCarbon Filter removes traces of any impurity as well as any dour or colour inherent in the stream. BODand COD of water is further reduced during filtration. Water after Tertiary Treatment is fit for use forflushing water for water closets, irrigation in kitchen gardens, lawns for Horticulture purposes. Proposed Plotted Development at SEZ at Village Sikohpur, Tehsil Sohna Dist. Gurgaon, Haryana. Design Concept Report1. Objective:- The design concept report aims to highlight the design parameters adopted along with scheme for power distribution for 70 Acres SEZ at Village Sikohpur, Tehsil Sohna, and District. Gurgaon, Haryana.2. Load Criteria:- An overall diversity of 80% has been considered. These have been considered on the basis of norms given by Local Electricity Board.3. Source of Power.- It has been assumed that multi point supply connection shall be taken from Local Power Supply Company.
As per the load calculations enclosed in the report, the total demand load envisaged is 21.50 MW. Power shall be received from DHBVNL at 66KV depending upon the availability of line in the near by area. The 66KV power received shall be stepped down to 11 KV at one location based on load pattern of site. The 11 KV power shall then be distributed with 11 KV overhead lines in all the areas. The total power required for immediate construction shall be 500 KW.Street LightingDistribution Proposed Plotted Development at SEZ at Village Sikohpur, Tehsil Sohna Dist. Gurgaon, Haryana. The power for street-lighting shall be distributed through distribution pillar which shall be located in various load centers. From the distribution pillars, the street- lighting shall be connected through XLPE insulated Aluminium conductor armoured cables laid in ground of required size, considering voltage drop and current carrying capacity.Illumination LevelsSL. Road Mounting Level of Type of FixtureNo. Width Height Lighting1. 18.0 Meters 10 Meters 15 Lux 1 Nos. 250 W HPMV fix/ 150W SON fixture2. 12.0 Meters 10 Meters 15 Lux 1 Nos. 250 W HPMV fix/ 150W SON fixture.3. 9.0 Meters 10 Meters 15 Lux 1 Nos. 250 W HPMV fix/ 150W SON fixture.4.3 Pole Design 18 Meter wide roads shall be provided with one single arm pole with 2 meters overhang installed on either side of the road in staggered manner.
Plotted Development at SEZ at Village Sikohpur, Tehsil Sohna Dist. Gurgaon, Haryana. 12 Meter wide roads shall be provided with single arm pole with 1.5 meters overhang installed on one side of the road. 9 Meter wide roads shall be provided with single arm pole with 1.5 meters overhang on one side of the road .Operation & Maintenance The street-lighting is proposed to be operated with timers located in the distribution pillars and shall be operated as follows: 6 PM to 10 PM - 100% Lights on 10 PM to 2AM - 66% Lights on 2 AM to 6 AM - 33% Lights on This system shall facilitate in energy saving as well there is no need to switch on the lights throughout the night. This shall also facilitate control of level of illumination with reference to the density of traffic. The distribution o street- lighting shall be done on 3 phase system. For designing conventional poles shall be considered.