Details of Project. 2 nos kva each & 2 nos. 500 kva each. Parking required 444 nos. (Car Parking 435, Bus Parking 9)

Transcription

1 Details of Project The project proponent wants to develop a Office building at Plot No. CBD 4, Street MAR, AA II, New Town, P.S. Rajarhat, North 24 Parganas, West Bengal. The project site is a flat land of Land Area = sqm There will be construction of a Office building with sqm total built up area. Total Land Area Total Built Up Area Ground Coverage No. of Block & Story Source of Water Total Quantum of Water required Quantity of Wastewater Generation Quantity of treated wastewater recycled Quantity of treated wastewater Discharge Quantum of Fresh Water required Quantity of Solid Waste Generation Constructional Phase Water Demand Total Population During Construction Total Population During Operation Electricity Load Electricity Supplied By D.G.Sets Fuel (diesel) Required for D.G.Sets Stack Height for D.G.Sets sqm sqm sqm Office building LB+UB+G+15 WBHIDCO 218 kld 83 kld 83 kld Zero Discharge 135 kld 400 kg/day 20 kld (Construction work 5 kld, Workers 15 kld) 215 persons 2425 persons (Office 1864, Service Persons 375, Floating Population 186) 3000 KVA (2.4 MW) NTESC 2 nos kva each & 2 nos. 500 kva each 480 litre/hr. 6.3 mt. for each 1000 kva & 4.5 mt. for each 500 kva Parking required 444 nos. (Car Parking 435, Bus Parking 9) Parking provided 482 nos. (Car Parking 472, Bus Parking 10) No. of trees provided 260 Nos. Water Supply, Wastewater Generation, Recycling and Discharge Daily water demand of the proposed project during operation phase will be 218 kld. Out of the total water demand 135 kld will be the fresh water demand and rest 83 kld (Landscaping - 33 Kld; HVAC 23 kld & Dual Flushing 27 kld) will be recycled from treated wastewater. The total wastewater generated from this project during operational phase is around 83 kld. The wastewater will be collected through a well designed sewer network leading to STP. The STP will be based on SBR technology and treated water is fully used within project. Page 1 of 9

2 Occu. Rate Total popu. Lpcd Total litre/day Office Area Service persons Floating Population Sub Total Landscaping 33 HVAC 80 Losses 1 Sub Total TOTAL WATER REQUIREMENT 218 Total Wastewater Generation 83 Total Wastewater discharge 0 Total Recycling 83 Landscaping 33 Car washing 0 HVAC 23 Flushing 27 Fresh Water Requirement 135 OCCUPANCY RATE NBC 2005, PAGE 21, BUILDING SERVICES-SECTION 3 kld WATER BALANCE DIAGRAM FRESH INPUT 135 kld Office Area 84 kld (Fresh water 57 kld, Recycled 27 kld) Service Persons 17 kld Floating Population 3 kld HVAC 80 Kld (Fresh water 57 kld, Recycled 23 kld) Losses 1 kld WASTEWATER GENERATED 83 kld Recycled Dual Flushing 27 Kld TREATED WASTEWATER GENERATED 83 kld Recycled 23 Kld Recycled 33 Kld LANDSCAPING 33 kld ZERO DISCHARGE Page 2 of 9

3 Municipal Solid Waste Generation and Its Management Garbage will be segregated at source for biodegradable, in-organic recyclables and in-organic inert material during construction (43 kg/day) ( kg/day) and operational phase (400 kg/day). The garbage (solid waste) generated within the project site will be biodegradable, recyclables and inert material in nature. Organic portion (50%) will be treated in-house by installing mechanical composter, In-organic recyclables (15%) will be sold to the vendor and in-organic inert material (35%) will be disposed off in SLF by Project proponent in association with WBHIDCO, as per the guideline given by SEAC/SEIAA/WBPCB for management of Municipal solid waste. Person Rate Total kg/day kg/day Flats Service persons Floating Population STREET SWEEPING GRAND TOTAL SAY 400 Solid Waste Management proposal for the Project Solid waste to be generated in the project = 400 kg/day Storage and Segregation of waste Biodegradable solid waste generated will be segregated at site. Biodegradable part will be treated by installing mechanical composter to produce manure. Non biodegradable recycles will be sold to the vendor. Inert material will be disposed off through the Municipal system. The general characteristics of solid waste generated from the complex indicate organic part as 50%, inorganic recyclables as 15% & inorganic inert material as 35%. Volume required for Solid Waste segregation for the entire 200 kg / cum = 2.0 cum Considering Storage depth = 0.5 m Area required for Solid Waste segregation for the entire project = (2.0/0.5) = 4.0 sqm Say total segregation area = 2.0 times of 4.0 sqm = 8 sqm Adding additional 20% area for movement, etc. Total area for storage and segregation of waste = 9.6 sqm Page 3 of 9

4 Organic waste management We will install package plant for converting organic solid waste to compost (technology approved by WBPCB) Organic waste generated = 200 kg/day Requirement of area for composting (50 kg/day/sqm) = 4.0 sqm Storage area for compost (50%) = 2.0 sqm Adding additional 20% area for pathway etc, Total area requirement for organic waste composting = % X ( ) = 7.2 sqm Inorganic waste management The inorganic recyclable waste generated = 15% of 400 kg/day = 60 kg/day The recyclable waste will be disposed off in regular manner. Secured Landfilling The non-recyclable inorganic (inert material) and rejects from compost unit will be transported for disposal in secured land filling site which will be operated and maintained by WBHIDCO in association with project authorities. Quantity of non-recyclable inorganic and rejects from composting = 35% of 400 kg/day+ 10% of 200 kg/day = ( ) kg/day = 160 kg/day. The inorganic inert waste transported to secured landfill site of the WBHIDCO = 160 kg/day Sl. No. Component Area (sqm) 1 Storage and Segregation Organic waste Composting 7.2 TOTAL 16.8 SAY 20 Total inorganic Inert waste to be disposed of in secured landfill site of WBHIDCO = 160 kg /day Page 4 of 9

5 Storm Water Management The surrounding area is predominantly residential and commercial area. The total land area of the proposed project is sqm. By applying rational formula the peak rate of storm runoff considering 12 mm/hr rainfall is given below. Total land area = sqm = 1.82 ha. By applying rational method, the peak rate of run-off = 10 x 0.60 x 12 x 1.82 cum/hr. = cum/hr. = 0.03 cum/sec. Velocity through pipe is 1.0 m/sec (non-scouring and non-silting). The required diameter of pipe is 240 mm. The storm drains of the complex will collect and convey the rainwater into the adjacent WBHIDCO drain. The internal drainage system will be designed considering the invert level of the WBHIDCO drain (outfall) in-front of the project site to avoid any flooding or water logging in the site. RAIN WATER HARVESTING The total roof area is about sqm. As per SEAC proposed guidelines the rain water harvesting potential is calculated in the following Table: DETAILS NO. OF STORY ROOF AREA, SQM TOTAL RAIN WATER POTENTIAL, lakh litre MINIMUM PERCENTAGE OF RAIN WATER WHICH SHOULD HARVESTED BY SURFACE STORAGE (%) SUB- SURFACE RECHARGE (%) RAIN WATER HARVESTING POTENTIAL AS PER SEAC GUIDELINES SURFACE STORAGE, lakh litre SUB- SURFACE RECHARGE, lakh litre Office Building LB+UB+G TOTAL TOTAL As per SEAC proposed guidelines of storage facilities and sub-surface recharging facilities required will be lakh liters and lakh liters respectively. Total volume of rooftop rainwater to be harvested as per SEAC guideline is lakh litres i.e cum. We are proposing 1 nos. storage tank of 100 cum capacity each i.e. 100 cum (total) for rooftop rainwater storage. Rest (30.61 lakh litre i.e cum) will be recharged through 1nos. recharge tubewell of each 150 mm diameter. Considering 81 days rainfall in a year, per day average rain water available is cum/day. Per day average rainfall available for recharge for each recharge structure = 37.79/1 = cum/day. All rooftop rain water will be diverted to the rainwater storage tank of 100 cum capacity (100 cum * 1 nos.) and overflow of the tank will be diverted to recharge structure and overflow of the recharge structure will be diverted to storm water drain within the campus. From the local survey/the agencies working for doing borewells, it is observed that there are prominent sand layers (aquifer) in the 65.0 to 90.0 meter zone. We are proposing to install our strainer in between 70 to 82 meter zone. Page 5 of 9

6 The quantity of Recharge, Q can be calculated through the following formula for Aquifer: Q = [2(22/7) * T *(H-h)] /[2.3 log 10(R/r)] Where, K= Permeability Coefficient is 5 cum/day/sqm, considering fine sand b = Average height of Aquifer = 12 meter, T= Tansmissibility of the aquifer = K * b H=Initial artesian pressure at the bottom of the aquifer h=artesian pressure in the well, (H-h) = Draw down =1.0 meter, R = 200 meter r =Radius of well = 150mm = 0.15 M Therefore, Total recharging capacity from 1 nos. 150 mm diameter tubewells is given below Q= [2X (22/7) X 5 X 12] / [{2.3 Log 10 (200/0.15)}] = ( / 7.2) Cum/Day = cum /Day We are proposing 1 nos. of 150 mm diameter tubewell for recharging. Average Capacity of recharging through 1 no. tubewell is = cum/day, whereas average requirement for each recharge structure is cum/day. Hence OK 1 NO.

7 R.C.C. SLAB 500 Ø COVER PLUG 500 Ø COVER GROUND LEVEL INPUT STEP 300 OVERFLOW 300 GROUND LEVEL PIT LENGTH - E WIDTH - F 2000 LEGEND MESH MESH COARSE SAND GRAVEL GRAVEL 3-5 mm SLOTTED PIPE mm 5-10 mm mm A : 12 Mt. B : 82 Mt. C : 1 Mt. D : 0.15 Mt. E : 4 Mt. F : 2 Mt. EFFECTIVE DEPTH : 2 Mt. EFFECTIVE VOLUME = 4*2*2 = 16 CUM PIPE DIAMETER "D" "B" STRAINER "A" PLUG "C" RECHARGE STRUCTURE Page 7 of 9

8 Electricity, DG sets, Stack height Electricity will be supplied by NTESC. The connected load will be about 3000 KVA (2.4 MW). DG sets 2 nos KVA each & 2 nos. 500 KVA are proposed. The emission from DG sets will be discharged through 6.3 m for each 1000 KVA DG sets & 4.5 m for each 500 KVA DG sets above the roof of the building. Fuel required for DG sets will be about 480 litre/hr. TREE PLANTATION DETAILS SL. NO. BOTANICAL NAME COMMON NAME QUANTITY 1 Alstonia scholaris DEVIL'S TREE 10 2 Ampherstia nobilis TREE OF HEAVEN 8 3 Bauhinia purpurea KACHNAR 10 4 Brassia actinophylla UMBRAELLA TREE 10 5 Cassia fistula AMALTAS 5 6 Delonix regia GULMOHAR 5 7 Grevillea robusta SILVER OAK 5 8 Gardenia jasminoides CAPE JASMINE 12 9 Ixora coccinea RUGMINI 5 10 Jacaranda mimosifolia NILI GULMOHAR Michelia champaca GOLDEN CHAMPA 5 12 Nyctanthes arborv tiris CORAL JASMINE Plumeria alba WHITE CHAMPA 9 14 Plumeria rubra RED CHAMPA 8 15 Spathodea companulata TULIP TREE Thevetia peruviana YELLOW OLEANDER 8 17 Azadirachta indica NEEM TREE 7 18 Dillenia indica ELEPHANT APPLE 5 19 Ficus benjamina JAVA FIG TREE 5 20 Ficus reginold GOLDEN FIG TREE 8 21 Schleichera trijuga KUSUM 5 22 Terminalia arjuna ARJUN TREE 7 23 Aegle marmelos BAEL 7 24 Mangifera indica var. 'AMARPALLI' MANGO Mangifera indica var. 'MULLICA' MANGO 5 26 Artocarpus heterophyllus JACKFRUIT TREE 7 27 Areca catechu BETELNUT PALM 7 28 Bambusa vulgaris GOLDEN BAMBOO PALM Cocos nucifera 'NARIEL'(tall variety) COCONUT PALM 8 30 Latania lantroides RED LATAN PALM Latania loddigesii BLUE LATAN PALM Borassus flabellifer PALMYRA PALM 8 Total 260 Page 8 of 9

9 Fire Fighting There will be all provisions as per NBC-2005 and other norms of fire fighting for the given height of the building. Clearance from WBFES will be obtained. Others There will be adequate car parking for the owners and provision for visitor s car park. Page 9 of 9