CONSTRUCTION OF RECHARGE TANK WITH RCC DESILTING CHAMBER AT ALWAR BY PASS T-POINT

Amount

Providing and Lowering of ISI mark PVC-U casing and screen pipe as per IS : 12818 : 2010 or amended up to date having pipe thickness as per IS code suitable for TW and DCB with threading , winding with superior quality of plastic mesh & rope in three layers with end cap complete as per technical specification and direction of Engineer In charge. Shallow well casing pipe (CS) suitable for depth up to 80 mtr.150 mm nominal dia ( internal dia ).

Polymer based Rainwater Harvesting Modules (Honeycomb design on each plate) made up of 100% recycled polypropylene capable of taking light vehicular movement upto atleast 40 tonnes / sqm with adequate backfilling & 4 small plates combination creating 3 spans inside the module. These modules are made from combination of large (683*410 mm) and small (369*410 mm) plates along with external locks Each large plate should have atleast fourteen external locking slots inorder to give stability to tank. These tank should have optimum connection & block stability using double lock stability. Each single tank is made of four large and four small plates in case of single tank and 10 large & 12 small plates for triple tank. Capacity of single tank is (.683*.410*.450) equals to 0.126 CUM. Weight of each large plate should be atleast 1050 gms and each small plate should be atleast 550 gm. Make - Wavin, Aco, Retas, Graf, etc.

Providing and Fixing of PP Non woven geotextile having thickness of 400 GSM, having minimum tear strength of 250 ASTM D4533, Width wise atleast 215 ASTM D4533 having puncture strength of 1550 plus asper ASTM D6241 Having elongation at Break of 57% plus as per ASTM D 4595 in single layer made out of long fibres to hold the modules including cutting, sizing, Heat welding and needle punched for high porosity and proper percolation.

Supply of FRP Filter having SS 304 mesh bracket with dia 750mm and height 1000mm capable of removing particles from infllow water. FRP filter should be Griha certified under criterions 21& 18 and SVAGRIHA criterion 9. Certificate should be valid on date of installation.