In December of 2012 under Stewart Weir (ZALIG Team) completed a geotechnical site investigation & report for a proposed expansion of 700S Bonnyville Substation on the behalf of ATCO Electric Ltd. The substation was live energized station and required the supervision of a qualified ATCO Electric Ltd. fieldwork representative in order to monitor safe limits of approach.
The purpose of the site investigation was to address the following issues:
Ground surface elevation at each borehole location
Obtaining soil samples (as per ASTM D1587) at 0.75 m interval
Pocket penetrometers readings on soil samples
Standard Penetration Tests (SPT) at 1.5 m intervals
Groundwater and sloughing level at completion of field drilling
Installation of standpipe piezometer to monitor the stabilized groundwater level
Laboratory testing to permit the development of geotechnical design parameters
Development of design parameters of earthwork
Recommendations for cement type in concrete
Laboratory materials testing included:
Moisture Content ASTM D2216
Consolidation Test ASTM D2435-90
Sulphate Analysis ASTM C1580
Atterberg Limits ASTM D4318
,
