CONSULTANCY ACTIVITIES FOR IMPROVEMENT TO SEWAGE SYSTEM INCLUDING CONSTRUCTION OF STP AND INFRASTRUCTURE FOR UTILIZATION OF TREATED WATER AT AF STN SULUR

Amount

SCHEDULE 'A'

Consultancy report for the following ground datas from AF Stn Sulur for design the suitable STP by E-inC’s Branch :- (a) Location / Latitude and Longitude of Station in degrees. (b) Elevation of the Station from MSL in Mtrs. (c) Metrological data :- (i) Rain fall (Maximum intensity in a year and average rainfall in mm) and HFL for 50 years at STP site (ii) Temperature(Maximum, minimum and average temperature in summer/winter ) (iii) Wind direction during different months/season (iv) Sesmic zone of region (d) Depth of Ground Water Table in Summer / Monsoon/Winter and soil characteristics includindg SBC up to 10 mtr depth or till hard strata is achieved at a grid of 500 SM with at least one point at location of STP. (e) Demographic Population :- (i) Total Population details(pocketwise breakdown with accommodation statement duly signed by station HQ) (ii) Futurisitic population details. (iii) Population data as per DU wise / Bldg wise and scale and Consumption of water details in format as given in scope of work. (f) Details requirement of STP :- (i) Total land requirement, availability of land, pocket wise details of land, bldgs and population for decentralised sewage disposal system (3 Nos) and preparation of Master Plan and Identifying the location based on population, density/ pockets. (ii) Distance of STP from the nearest building. (iii) Preparation of percolator test report as per Appx ‘A’ of IS-2470 (Para 2) – 1985 at 4-5 sites including 3 Nos STP location.

(iv) Physical and chemical properties of Raw Sewage as per Appx ‘A’ to ascertain the sewage characteristics to conduct the composite sampling once in a week for diurnal variation on hourly basis from the existing sewage outfall. Considering four week month, three samples are to be taken on weekdays and the fourth sample on off day i.e. sunday.Sampling should be done for at least one month during lean flow season . (g) Disposal of Treatment waste water :- (i) Methods of final disposal of treated water from plant with brief reasons (Over land / in stream / reuse etc.,)(with qty to be disposal) (ii) Distance of nearest stream / nallah from the proposed STP to be marked in the Master Plan. (iii) Any requirement of acquisition of land to be clarified. (iv) Any restriction of state PCB to be explained and solution to be derived. (v) If the disposal proposed on land, confirm the availabilities of land and marked in Master Plan. (vi) Any requirement of obtaining permission from TN State PCB is to be clarified and procedure for obtaining the same shall be explained in detail. (vii) Proposed location of STP and reuse of treated waste water (h) Master Plan / Zonal Plan : Master Plan / Zonal Plan to be prepared in the scale of 1:2000 and showing the following details :-(aa) Layout Plan of Station: Buildings, roads and other structures presently existing and those envisaged in future expansion (including phase wise growth time frame of completion of carious phases) marked in different colours. Buildings/ Structures shown must be serially numbered and contributing population from each building (living and non living OTM) alongwith sewage load should be furnished as a separate appendix also. (ab) Contour levels (0.5m interval) to be superimposed on the plan.

(ac) In the master/zonal plan the water distribution network , underground cables, and other UG services in the station has to be shown (ad) Proposed / Recommended sewer network alignment (if any) to be marked with the reasons / justification, it should be super imposed on contour plan of the area in addition the proposed sewerage network plan should indicate the followings :- (i) Node number at each manhole junction. (ii) GL at each node. (iii) Contributory population both existing and anticipated in future at each node. (iv) Length of sewer between nodes. (ae) Drawings of the proposed scheme / layout plan, as given above, should be in A0 size. If all the entries given in the drawings are not legible then separate section wise blow up in A0 size should be provided. Four copies of all drawings and one set of drawings without levels to be provided. Soft copies of the drawings and level sheets (in AutoCAD) should also be provided. Notes:-. 1. Permission from the State Pollution Control Board is a per-requisite for disposal of effluents. The same must, therefore be obtained from the Board by the consultant. Pollution Control Board generally specified that BOD and suspended solid contents of treated effluent must not exceed 20.0 mg/L or 30.0 mg/L, based on location. In case any other condition / restrictions are placed by the board, the same must be intimated. 2. In case the Sewage Treatment Plant is to treat any toxic liquid waste, in addition to domestic sewage, the volume and characteristics of such wastes may be intimated. 3. Characteristics of toxic waste can be determined only by laboratory analysis in case laboratory facilities are not available locally, values of the same adopted by the local municipalities may be obtained and forwarded. 4. Area of the station to be surveyed is approx 245 acres of land.

Total of Schedule 'A'

Hydro Therm Engineers