tender for rco for supply of isi mark geo membrane for pond lining- is 15351:2015 (reaffirmed 2019 agro textiles laminated high density polyethylene (hdpe) woven geo membranes for water proof lining (with up to date amendments) , isi mark geo membrane for pond lining- is 15351:2008 textiles laminated high density polyethylene (hdpe) woven fabric lining (geo membranes) (with up to date amendments), , type i - ( model) thickness in micron (+/-7.5%)(250), mass , gm/sq meter (gsm) min (250) , type ii - (model) thickness in micron (+/-7.5%)(500), mass , gm/sq meter (gsm) min (420) , type iii- (model) thickness in micron (+/-7.5%)(750), mass , gm/sq meter (gsm) min (650) , type iv- (model) thickness in micron (+/-7.5%)(1000), mass , gm/sq meter (gsm) min (950)