ENVIRONMENTAL MANAGEMENT PLAN

Transcription

1 ENVIRONMENTAL MANAGEMENT PLAN For SOWPARNIKA SAMETHANA M/s SOWPARNIKA PROJECTS AND INFRASTRUCTURE PVT LTD Sy No.57/1,57/2 & 277 of Anugondanahalli hobli, Samethanahalli village,hoskote Taluk, Bangalore Rural District. MAHESH & DEV 17/1, Venkataswamy Naidu Road Tasker Town Bangalore

2 INFORMATION: PROJECT: - CONFIGURATION: - PURPOSE: - PROMOTERS: - Residential of 784 Apartments Basement+Stilt+8Upper floors floors Residential M/s. SOWPARNIKA PROJECTS AND INFRASTRUCTURE PVT LTD LOCATION: - Sy No.57/1,57/2 & 277 of Anugondanahalli hobli, Samethanahalli village,hoskote Taluk, Bangalore Rural District. CLUSTER: - 2 blocks STATUS: - M O E F clearance sought for construction ESTIMATED COST: crores AREA STATEMENT AREA OF PLOT : Sq.M

3 ALLOWABLE F A R : 2.25 ACHIEVED F A R : 2.24 COVERAGE PERMITTED : 55% COVERAGE ACHIEVED : 33.3% BUA : Sq.M HEIGHT OF THE BUILDING : 26.95M TOTAL NUMBER OF UNITS: 784 CAR PARKING PROVIDED : 480 Nos. AREA EARMARKED FOR GREENERY : Sq.M PERCENTAGE GREENARY : 47.8% 1 Introduction

4 The Environmental management plan (EMP) is necessary to ensure sustainable development in the area of the proposed project. Hence it needs to be an all encompassing plan for which the Industry, Government, Regulating agencies likes pollution control board working in the region and more importantly the population of the area need to extend their co-operation and contribution. It has been evaluated that the project area will not be affected significantly with the proposed project. Mitigation measures at the source level and an overall management plan at the site level are elicited so as to improve the surrounding environment. The following mitigation measures are recommended in order to synchronize the economic development of the project area with the environmental protection of the region. The construction phase impacts are mostly short term, restricted to the plot area and not envisaged on the larger scale. In the operational phase the environmental impacts are due to continuous operation of the project, hence, the emphasis in the environment management plan (EMP) is to minimize such impacts. The emphasis on the EMP development is on the following: Mitigation measures for each of the activities causing the environmental impact Monitoring plans for checking activities and environmental parameters and monitoring responsibilities. Role responsibilities and resources allocation for monitoring. Following sections describes the environment management plan proposed for construction and operation phases. 1.1 Management during Construction Phase In the impact assessments following four activities have been identified as causing impact of different degrees on the environment during construction phase: 1. Site clearance 2. Transportation of construction materials 3. Construction activity 4. Labour camps of construction workers 1.2 Mitigation measures Each of the above activities during construction phase is critically reviewed for suggestion of mitigation measures. Based on this, the Table 1.1 to 1.4 gives the mitigation measures for the activities considered to be causing significant environmental impacts during construction phase. In general the best housekeeping practices are incorporated in the design as well as construction phase to reduce the short terms impacts due to construction activities. TABLE : 1.1 EMP FOR CONSTRUTION PHASE IMPACTS SITE CLEARING

5 Environmental Mitigation Impacts Soil erosion Extent of vegetation removal shall be minimized to prevent extent of soil erosion. Vegetative cover shall be reprojected /rehabilitated at the earliest practicable time to minimize duration & extent of soil erosion. Noise generation Selection of equipment with less noise generation to be used. The earth moving equipment shall be periodically checked and maintained for noise levels. Since the site is more or less even use of these earth moving equipments may not be necessary. The workers shall be provided with adequate PPE such as earplugs to reduce impact of high noise levels. Dust generation The site cleared shall be periodically watered to reduce emission of dust particles. The workers shall be provided with PPE such as nose marks and goggles to reduce impact on health. Remarks Implementation Responsibility: Contractor Project consultants M/s. SPIPL Implementation Responsibility: Contractor Project consultants. M/s. SPIPL Implementation Responsibility: Contractor Project Consultants M/s SPIPL. TABLE : 1.2 EMP FOR CONSTRUCTION PHASE IMPACTS TRANSPORTATION OF CONSTRUCTION MATERIALS

6 Environmental Impacts Noise generation Mitigation Periodic maintenance vehicles are required. Silencers to be clog free condition & noise free Remarks Implementation Responsibility: Contractor Project consultants M/s SPIPL Dust generation Construction materials will be covered with tarpaulin sheets to prevent the material from being air borne. Vehicular Emission The vehicle speed shall be regulated The workers transporting materials shall be provided with PPE such as nose asks to reduce impact of air borne dust on their health Periodic emission check for vehicles is required. Clean fuel shall be used for vehicles Vintage vehicles to be banned Implementation Responsibility: Contractor Project consultants M/s SPIPL Implementation Responsibility: Contractor Project consultants M/s SPIPL. TABLE: 1.3 EMP FOR CONSTRUCTION PHASE IMPACTS CONSTRUCTION ACTIVITIES

7 Environmental Mitigation Impacts Noise generation Personnel protective Equipment (PPE) such as ear plugs and helmets shall be provided for construction workers. The working hours shall be imposed on construction workers. Dust generation PPE in the form of nose masks shall be provided for construction workers. Use of water sprays to prevent the dust contractor from being air borne. Remarks Implementation Responsibility: Contractor Project consultants M/s SPIPL. Implementation Responsibility: Contractor Project consultants M/s SPIPL Air Emissions From construction machinery Periodic check and regular maintenance of construction machinery for emissions clean fuel shall be used in equipments Implementation Responsibility: Contractor Project consultants M/s SPIPL TABLE: 1.4 EMP FOR CONSTRUCTION PHASE IMPACTS

8 Environmental Mitigation Impacts Usage of water Water for Labour shall be supplied in required quantities (5 KLD) and from SGWSS. Remarks Implementation Responsibility: Contractor Project consultants M/s SPIPL. Domestic Wastewater generation Provision of adequate sanitary facilities, Mobile toilets with 5oo Lts sewage storage facility. Periodically the tank is cleaned by grey water tanker cleaners and disposed off without causing any harm to the environment. (can be used as manure for agricultural fields) or sent to the CETP Implementation Responsibility: Contractor Project consultants M/s SPIPL. Solid waste generation Adequate facilities to handle solidwastes shall be provided. Organic waste of 56.4 kgs generated & is composted. Used as manure. Implementation Responsibility: Contractor Project consultants M/s SPIPL 1.3 Management during Operation Phase

9 Following are the identified operational phase activities which may have impact on the environment. Air Quality Water Quality Noise Quality Solid waste disposal Green belt development Air Quality Management The Pollutants envisaged from the proposed project are SPM SO2, NOx, HC and CO mainly due to burning of liquid fuel (HSD) in DG. Exhaust from DG set will be emitted from stack of adequate height for dispersion of gaseous pollutants. The green belt development is also proposed on the plot area. Following Table 1.5 presents the EMP for air quality management during operation phase. TABLE: 1.5 MANAGEMNT OF AIR QUALITY DURING OPERATION PHASE Environmental Impacts DG Set Ambient air Quality Mitigation Equipment selected will ensure the exhaust emission standards as prescribed as per the latest amendments from the ministry of environment & forest, Government of India. DG will be used as stand by unit. Periodic check and maintenance Ambient air quality monitoring as per the prescribed norms at regular interval Water Quality Management

10 TOTAL NO OF PERSONS Number of abodes planned Water requirement per capita per day 784Apartment units = 784x5x135 = 529.2KLD Total Water requirement based on standard needs = KLD Total quantity of domestic sewage generated = KLD Sewage Treatment plant designed for the proposed Site cum...

11 TECHNICAL PROPOSAL FOR PROPOSED 480KL SEWAGE TREATMENT PLANT CONTENTS. Introduction. Objective of the report. Proposed water supply system. Proposed Drainage system. Quantity and Quality of Raw Domestic Sewage. Treatment Methodology adopted. Treatment Process Overview. Desire Quality of Treated Sewage. Utility of Treated Sewage. Design details of the Proposed Sewage Treatment Plant. Flow Chart of Sewage Treatment Plant for the apartment. Hydraulic Load Calculation 1. OBJECTIVE OF THE REPORT The Primary Objective of preparing this report is to identify sources of pollution from the proposed residential apartment so as to evolve a technically feasible and comprehensive treatment and disposal option for the domestic sewage generated from all the residential units and other sources of the apartment and its utility after the treatment. 2. PROPOSED WATER SUPPLY SYSTEM: The total water demand of the apartment is worked out by considering that the apartment is fully occupied. As per IS specifications, the domestic water demand is considered as 135 LPD, however since it is a residential apartment water utilized for public use and fire fighting is also considered. Therefore, the total water demand of the Lay out works out as below. Water for domestic demand 135 LPD The total quantity of water required for the apartment is worked as below Total population of the apartment considering

12 Average 5 persons per family : 5 x 784 = Total water demand of the apartment: 3920 x 135 = 529.2kld The above requirement of water is intended to meet by the supply from Samethanahalli Grama Panchayath Water from the sump will be pumped to an elevated tank of 100,000.lts. Capacity and to a ground level reservoir of 100,000 liters capacity from where it will be supplied to the apartment through a Piped distribution systems (PWS) 3. PROPOSED DRAINAGE SYSTEM: The raw domestic sewage generated from the apartment is proposed to be conveyed to the sewage treatment Plant with a network of sewers originating from lateral sewers of the individual households, where it is lead to the treatment plant. The underground drainage system is proposed to be provided with manholes provided at an interval of not exceeding 60 Mts. 4. QUANTITY OF RAW DOMESTIC SEWAGE: The total quantity of raw sewage generated from the residential units and other sources of the apartment is worked out taking into consideration, that the apartment is fully occupied and the residential units of the apartment are fully occupied. The Number of residential units in the apartment: Anticipated population of the apartment considering Average of 5 persons per family : 784 x 5 = 3920 As per IS : Domestic water demand is assumed as :135 LPD Assuming that about LPD of sewage is generated The sewage treatment plant is designed for 480 KLD 1. QUALITY OF RAW SEWAGE AND TREATED WATER: Parameters Before Treatment After Treatment ph 6.5 to to 7.5

13 Suspended Solids 250 To 400 <20 BOD mg/l 200 TO 300 <10 COD mg/l 400 to 425 <50 NH4-N 25 <5 N Total - <10 Fecal Coli-form - < TREATMENT METHODLOGY ADOPTED: The treatment methodology adopted for treatment or raw sewage generated from the apartment is based on SBR extended aeration activated sludge process followed by pressure sand filtration and disinfection. The proposed sewage treatment will consist of the following treatment units. 1. Bar screens (coarse and fine) 2. Grit channel. 3. Equalization Tank. 4. S B R Aeration Tank. 5. Decanting tank. 6. Sludge holding tank. 7. Pressure sand filter. 8. Chlorine dozer. 9. Sludge drying beds. 10. Treated water tank. 7. TREATMENT PROCESS OVERVIEW: The raw sewage generated from the apartment is initially led to the coarse bar screen chamber of the treatment plant where coarse organic matter, rags etc are screened. The outlet of the coarse screen is led to a fine screen chamber where finer matter is screened, the screening of both coarse and fine screens are removed and disposed of by land filling. The prescreened sewage is lead to equalization tank, which are provided with Air Agitation Grids, the operation of the Air agitators will keep the contents of the

14 equalization tank in suspension and so that the variation in the characteristics of the raw sewage is dampened. The equalized sewage is pumped with raw sewage transfer pumps to the SBR aeration tank provided with Membrane Diffused Aeration System operation of this System will supply the oxygen required for the growth of bacteria. The Aeration is done on batch process, the sewage is pumped to the SBR Tank, aerated for Four hours and allowed for settling for two hours, the top water is decanted to the pre filtered and excess sludge to the sludge holding tank and excess sludge is diverted to sludge drying beds, where it is dried and used as manure. The water from the pre filtered tank is pumped through sand filter and carbon filter for further removal of suspended solids and bacteria and collected in the treated water tank for secondary usages 8. UTILITY OF TREATED SEWAGE: The treated sewage after the proposed treatment conforming to the urban reuse standards stipulated by KSPCB Shall be utilized for gardening, developing of vegetation and lush greenery in the apartment premises and for other miscellaneous utilities like toilet flushing etc. The design details for the various unit processes and operation of the proposed treatment facility is appended subsequently. DESIGN DETAILS Total quantity of Raw Sewage = 476 m 3 /Day ~ 19.8 m 3 /Hr BOD 20 C = 250 mg./ ltr. TSS = 300mg./ ltr. DESIGN OF TREATMENT UNITS: 1. BAR SCREENS (COARSE AND FINE)

15 Provide two bar screen chambers (coarse and fine) each of size along with top tray for collection of screenings, also provide bar screens (coarse and fine) each of size 0.5 m x 1.0 m. 2. EQUALIZATION TANK. Average Flow Rate : 476 m 3 /Day ~ 19.8 m 3 /Hr. Provide Detention time : 8 hrs. Therefore volume of Equalization Tank required: 19.8 x 8 = m 3 Assume SW Depth : 2.5 m. Area of the tank : M 2 Therefore size of the Equalization Tank required : 5.8 m x 12.0 m x 2.5 m SWD, NOTE: provide Air agitation Grids to keep the contents of the Equalization Tank in suspension. 3. AERATION TANK Flow Rate : 476 m 3 /Day ~ 19.8 m 3 /Hr Inlet BOD 20 C : 250 mg/ltr. Organic Load : 476x 250/1000 = 119Kgs / Day Total oxygen required Assuming that 2.2 Kgs of O 2 /kg of BOD Removal : Kgs/day.

16 F/M : 0.15 MLSS : 4000mg/liter Volume of the Tank required : 250 x 476/ 0.15 x m 3 Total Volume Including 30 % Extra Volume for Sludge Recirculation : m 3 Size of Aeration Tank Required: 8 m x 8 x 16 m SWD Air required for aeration : 250 m 3 /Hr Type of aeration : Membrane Fine pore diffused Aeration system. No. of membrane required : 16 Nos. of 1.2 m long. Function : To aerate the contents of the aeration tank and to sustain the biological activity so as reduces the organic load. 4. DECANTING TANK Size of the unit : 8 m x 8 m x 16 m SWD Volume : 1031 m 3 Detention time available : 5.01 Hours. Function : To separate the biological flocs

17 From the over flow of the aeration tank. 5. SLUDGE HOLDING TANK Size of unit : 12 m x 8 m x 2.5 m SWD Volume of the unit : 240m3 Detention time available: 150.4/ Hours.=10 Function : To collect & store the excess sludge from the aeration tank before it is pumped to sludge drying beds. 6. SLUDGE DRYING BEDS (SDB)/FILTER PRESS Filter Press Type : Rail slider Plate Size : 18 x 18 No. of Plates : 22 Nos No. of chambers : 21 Nos Area of Filtration : 4.5 M² Cake holding capacity : 45 Litres Operating pressure : 7 kg/cm2 7. PRESSURE SAND & CARBON FILTER Total Flow : 476 m 3 /day Duration of Pumping considered: 10 Hr./day Rate of Pumping : 47.6 m 3 /hr. Surface loading considered : 10 m 3 /m 2 /hr. Area of proposed Sand media filter Required : 4.76 m 2 Therefore size of proposed sand

18 Filter : 2.4 m dia. 8. FINAL TREATED WATER TANK Size of unit : 16 m x 5.0 m x 8 m SWD Volume of the unit : 640 m3 Detention time available: 2.00 Hours. Function : To collect & store the filtered water from the sand and carbon filters.

19 FLOW CHART OF PROPOSED SEWAGE TREATMENT PLANT Flow 476 m 3 /day Bar Screen (1.0 m x 1.0 m x1. 2 m long) Equalization/Pre-aeration Tank Aeration Tank cum settling Air Blower (1200 m 3 /hr.). Sludge holding tank Filter Press Excess Sludge Decanting Tank Sand & Carbon Media Filter Treated Water Tank To Garden and recycling.

20 1.3.4 SOLID WASTE MANAGEMENT A. Solid waste consist of 1. Garbage 2. Ashes 3. Rubbish 4. Dust Etc. Solid waste is broadly divided into 1) Organic or combustible matter. 2) Inorganic or mineral or non- combustible matter. The solid waste generated during operation phase can be categorized under three types : Domestic/Residential waste Wet Garbage: Dry Garbage: Food waste, Lawn mowing wastes etc. Paper, plastic, Bottles, etc. Sludge from sewage Treatment Plant (STP) The solid waste generated in the premises is estimated to be about 1764kg/d, which will be sent to proposed composting unit for further processing, Reusable items such as plastic bottles, cold drinks, Meta/Glass containers, etc are sold to Recyclers. The various mitigation measures to be adopted during collection and disposal of wastes are as follows: It is preferable that the container and bins used for collection of waste should be of closed type of that the waste is not expected and thus the possibility of spreading of disease through flies and mosquitoes is minimized. Collection system should be properly supervised so that quick and regular removal of waste from the dustbin is practiced. Door to door collection will be arranged in each residential unit to collect the solid wastes. The biodegradable wastes will be segregated and sent to the proposed composting unit. Non-biodegradable wastes such as plastic materials, glass & metal wastes will be handed over to the waste recyclers. Quantity of Domestic Solid Waste

21 Quantity of domestic solid waste Generated per day from the proposed Project Total No of Persons = 3920 = 3920X 0.45 = 1764 Total quantity from the establishment = 1764Kg/day Disposal of solid waste generated Solid waste generated in the premises to the following agencies for safe disposal. Table 1.7 : Solid waste Generation Sl. No. Waste Quantity Treatment & Disposal 1. Total solid waste 1764 Kgs/Day Organic waste will be Organic Kgs/Day composted using 2 no.s 200 kg OWC at the project site and inorganic waste will be handed Inorganic Kgs/Day over to the Municipal authorities door to door collection facility. 2 STP Sludge Kgs/Day STP Sludge will be used for green belt development in the project site. 3.. E- Wastes 98Kgs/day Will be stored in designated area and disposed to the Authorized reclaimers by the KSPCB

22 B. Hazardous Waste Management Waste oil from D.G Sets. About 600Liters of waste oil per year will be generated from standby DG sets. This will be stored in leak-proof sealed barrels and will be given to KSPCB authorized waste oil reprocessors Noise Level Management High noise generated units such as DG set will be provided with acoustic enclosures. Green belt on the project boundary will further act as noise barrier and helps in attention of noise. Following Table 1.8 Presents the EMP for noise levels. D G Sets provided are 1 nos X500 & 1X 200 KVA Capacity. Table: 1.8 MANAGEMENT OF NOISE LEVELS DURING OPERATIONAL PHASE Environmental Impacts Noise from DG set area Mitigation DG set will be installed in an area (Utility section ) where the access will be restricted The use of PPD ( ear plugs) will be mandatory is this area selection of equipment to ensure that the residual noise level of 75 db ( A ) Noise levels will be checked periodically using a noise pressure level meter 1.4 Green Belt Development Green belt development ( Sq m) within the premises will reduce noise levels and dust levels. To make the green belt effective for this purpose, it is essential to select proper plant species and design the plant and row spacing that result in lowering the sheltering effect. In the development of green belts multipurpose plant species should be selected. This will satisfy the ecological requirement for species diversity. 1.5 Storm Water Disposal through Rain Water Harvesting Rain water from roof tops, balconies etc. is allowed to flow through down take pipes that are sloped to the concealed storm water collection tanks. This water can be used for house gardening and for other domestic purpose for washing vehicles, etc.

23 Rain water from other sections of the site is led to catchments pit at each change in flow direction and at each change in pipe diameter with horizontal & vertical grating depending upon the road section. Design of piping network is done on the basis of: Site Topography & Effective Area Sizing by Rationale s Formula with full running pipe Run-off Coefficient Rain water from all the roads is routed to the side drains on either side of the road which is designed as per the Metrological report, intensity of rainfall is taken as 75mm 100mm per hour. Percolation pits can be provided below the tank bed of the collection tanks, thereby recharging the ground water table as well. Rain water harvesting will be done by both collection for reuse and ground water recharge. For assessing the available quantum of water it is assumed that incidental rain fall less than 10 mm will not yield any collectable yield and such rain fall account for 50% of the total rainfall. The runoff coefficient 0.55 is considered, duly accounting for evaporation, seepage etc. Rain Water Harvesting: The project site can be categorized as terrace and paved area for storm water collection. As per the norms each sqmts of terrace area yields 20 ltrs of water, and un paved area yields 10 ltrs of water, based on the above the volume of rain water collected will be as follows. Terrace area = sqmts Volume of rain water collected = X 0.9 X 0.85 = CUM Volume of rain water collected from the paved area Total volume of the rain water collected = X0.7X0.85= CUM Volume of rain water collected from the green area Total volume of rain water collected = X0.5X0.85 = CUM Rain water potential in the project = CUM

24 Rain water from the roof will be conveyed to storm water drain interconnected with storm water recharge pits, over flow from saturated rain water pits will further traverse in the drain and collect in storm water storage tank. Water thus collected in the storage tank will be provided with partition, to accommodated rain water from roof & collection, after collection water in passed through sand filters via pumps to remove any suspended particles and outlet from filter will be collected in treated water tank which will be used for non potable applications. Their will be two piping systems which will be implemented in the project, 1 for domestic application leading to washbasin, health faucet and kitchen. 2 for non domestic application connecting only to EWC and landscape area. Water will be in regular use in monsoon, and will be consumed to the best of the domestic needs, overflow if any from the tank will lead in to external storm water drain. Hence effective rain water harvesting plan will be implement at the project site. Mode of Usage of rain water: The Ground water will be recharged through 16 No. of percolation pits. Each pit has a capacity to absorb in excess of water. The balance water will be collected in two tanks of 0.1ML capacity each. The water collected in rainwater collection sump will be used for car washing purposes after passing through the pressure sand and the activated carbon filter of diameter 650-mm each. Mode of usage of water incase of sudden flash floods / continuous rains: though the rainy days are considered as 120 days in Bangalore and the total rain is divided by the no. of rainy days, practically the intensity of rain is not the same every day. It varies from day to day. Incase when there is a heavy and flash rain, the excessive rainwater is led into the existing municipal storm water drain.

25 1.6 Monitoring Strategy The monitoring of various environmental parameters is necessary which is a part and parcel of the environmental protection measures. A comprehensive monitoring programme is suggested below: TABLE 1.9 MONITORING SCHEDULE FOR ENVIRONMENTAL PARAMETERS Sr. No. Particulars Monitoring Frequency Duration of monitoring Important Parameters for Monitoring I Air Quality 1 Ambient Air monitoring Once in a month 24 hrly sample TSPM, RPM, project premises SO2, Nox. 2 Stack Monitoring Once in a month Grab SO2, SPM, Nox HC, CO II Water and wastewater Quality 1 Water Quality i Ground water at two Once in a month Grab As per KSPCB locations ( up-gradient & requirements down-gradient) of treated effluent discharge area/ land 2 Waste Water Quality i Inlet to STP Daily Composite - ii Treated effluent prior to Daily Composite - discharge III Soil Quality 1 Within project premises at 1 Once in a month Composite location on effluent sample discharging area land 2 Ecological preservation and Seasonal Visual Up gradation Observations IV Noise Quality Once in a month 24 Hrs Monitoring As per KSPCB requirements Survival rate Noise levels in Db(A)

26 FINANCIAL ALLOCATION/ BUDGETORY PROVISIONS FOR ENVIRONMENTAL MANAGEMENT ASPECTS DURING OPERATION PHASE (per annum) Sl.No Financial provisions (Rs In Lakhs) Description Capital Cost Recurring cost 01 Construction of Sewage Treatment Plant Operation of Sewage Treatment Plant per annum Rain Water Harvesting Tanks and its facilities Rain Water Recharging pits and its management DG Maintenance Landscaping, Top soil conservation Solid Waste Management Environment Monitoring Plan (Air, Noise, Water and Solid Waste) TOTAL ANNEXURE 1 WATER BALANCE DETAILS:

27 WATER QUANTITY BALANCE Total Qty of Water Consumption : 3920 x 135 = KLD Total Qty of Waste water generated : 529.2x0.9 = KLD TREATED WATER CONSUMPTION: Total treated water available : kld Toilet flushing : L/D Gardening Secondary uses : L/D : L/D