Well No. 4

Church and Parsonage at Colonia Guaraní

 Technical Details

Sponsor:    Rotary International

Drilling date: Feb 16-18, 2003

Location:   Latitude -  S 24°59.40 '     Longitude - W 54° 32.44'

Elevation:   258 meters above mean sea level

Total cost:    $ 2,871

Drill depth:    22 meters

Soil types encountered:    Clayey sand, clay, basalt basement rock

Static groundwater level:     12.3 meters below ground surface

Dynamic groundwater level:       14.75 meters below ground surface

Installed well depth:   19.6 meters

Length of screened section:   12 meters

Length of gravel packed section:   17.5 meters

Length and type of sealed section:  1.5 meters cement/bentonite grout

Pump description:    Electric submersible, 1 HP, 1 phase 220 volt, with flow restrictor

Depth to base of pump:    18.9 meters

Flow rate: 1,045 liters per hour, with flow restrictor (the smallest pump available in Paraguay is 1 hp, and without the flow

                            restrictor the well was pumped dry in 2 minutes.  With a 4 mm orifice flow restrictor the flow rate is maintained

                            indefinitely with only a 2.4 m drawdown)

Water analysis results: Microbiologic - no bacteria after 72 hour incubation

                                            Microscopic - no disease causing  materials found on sediment