| SL# | Item Code | Item Description | Unit |
Rate for ZoneA Dhaka & Mymensingh Division |
Rate for ZoneB Chattogram & Sylhet Division |
Rate for ZoneC Rajshahi & Rangpur Division |
Rate for ZoneD Khulna & Barishal Division |
|---|---|---|---|---|---|---|---|
| DIVISION 26 : SANITARY & WATER SUPPLY WORKS | |||||||
| 1731. | 26.77.4 | Consumption Quantity: 10,00,000 to 50,000,000 liter | per liter | 1.54 | 1.54 | 1.54 | 1.54 |
| 1732. | 26.77.5 | Consumption Quantity: 50,000,000 liter and above | per liter | 1.23 | 1.23 | 1.23 | 1.23 |
| DIVISION 27 : DEEP TUBE-WELL | |||||||
| 1733. | Note: Tender for test & observation well must be called before hand. Tender for main production well will then be called on the basis of required data obtained from the test well. Requirements of water must be the guiding factor for dimensioning the main well. | ||||||
| 1734. | SINKING OF 38 mm DIA TEST AND OBSERVATION WELL | ||||||
| 1735. | "Furnishing design of a production well by testing of water and soil samples from test bores up to 350 m depth collecting samples of water from the best suitable aquifer, filling in sterilized air-tight glass bottles having no air space inside; collecting soil (sand, solids etc) at every 3 m interval and at each change of soil strata from the bores, arranging them in the cell of a box in an orderly manner. Carrying out test of water for (1) pH, (2) CO2 (3) Chloride, (4) Fluoride, (5) Iron, (6) Manganese, (7) Nitrate-Nitrogen, (8)Total alkalinity, (9) Total hardness, (10) Arsenic, (11) Turbidity, followed by test reports along with Bangladesh Standards of potable water and (12) sieve analysis on soils throughout a bore, leading to ascertain the best suitable sustained aquifers, depths and slot sizes of strainer, types and dia of tube well for specific yield, thickness of shrouding around strainer, fineness modulus of shrouding materials, mechanical units (pumps, compressor) for testing and operation of the tube well, maintaining test bore functional till tube well installation, testing etc. is finished, finally filling and sealing the left over test bore permanently, including carrying water and soil samples under direct responsibility of Engineer-in-charge to BRTC, BUET or other reputed laboratory, approved by the authority, submitting the report and design details all complete and accepted by the Engineer-in-charge and maintaining the mobilized tools and plants at site till satisfactory test results are found (if not, next test bore may be executed with the approval of concern S.E. / Design Office) | ||||||
| 1736. | Total No. of test on water: 11 types of test x 1 test bore x one set sample (3 specimen) = 11 Nos. test (each specimen 1.5 liter of water) | ||||||
| 1737. | Sieve analysis: min 9 Nos. Sample x one test x One bore = 9 Nos. test (Samples are of 1 kg dry wt. each)" | ||||||
| 1738. | There are about 55 (fifty-five) tests for potable water quality standard according to Bangladesh Environment Conservation Rules-12 (Schedule-3), 1997, under ECA 1995 of Ministry of Environment and Forest. Therefore, additional test/ tests on water or sieve analysis of soil if required, other than the above specified 12 (twelve) tests, may be carried out for public interest as per direction of the design engineer on actual payment including profit, VAT and all other charges. | ||||||
| 1739. | Disinfections of the well by using minimum 3 kg of bleaching powder of 33% strength or any other disinfectant as per standard specification and accepted by the Engineer-in-charge. | each | 454 | 454 | 454 | 454 | |
| 1740. | PRODUCTION WELL | ||||||
