Execution Of Public Works Called: 1) "Construction Of Pilot Project Of Sustainable Urban Drainage System (Suds) And Monitoring Equipment, In The Metropolitan Area Of San Salvador, Colonia Médica-Municipality Of San Salvador" 2) "Construction Of Pilot Project Environmental Protection And Sanitation Of The Spring And Monitoring Equipment, In La Ermita Park, Located In The 4Th Extension Of Avenida Norte, End Of Canjura Street, Beginning Of Quebrada Parque La Ermita, Between The Boundary Of Colonia San Emigdio And Colonia Santa Maria, Municipality Of Apopa ". (EXPIRED)