Annual Rate Contract of cleaning of CWRs and OHSRs by Mechanized system including dewatering, removal of all silt scrapping of wall high pressure cleaning followed by vacuum cleaning and disinfection of reservoir with antibacterial spray and Ultra vi Annual Rate Contract of cleaning of CWRs and OHSRs by Mechanized system including dewatering, removal of all silt scrapping of wall high pressure cleaning followed by vacuum cleaning and disinfection of reservoir with antibacterial spray and Ultra vi