Abstract:
Survey conducted on 26/02/2011 to map pertinent features for the Casey biopile project (bioremediation of the MPH fuel spill) for the Contaminated Sites Group (Terrestrial and Nearshore Ecosystems) (Project 1163 (ASAC_1163) - Remediation of petroleum contaminants).
Current position of quarry face also mapped at the same time at the request of Henk Brolsma (AAD Mapping Officer).
Description of
... feature tables in 26 February combined.mdb
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Database is compiled from 3 rover files collected consecutively on 26/02/2011 (Biopile-26-02-11.ssf, Biopile-26-02-11-2.ssf, Biopile 3.ssf). Rover files collected with a Trimble ProXH receiver on a 1.5m ranging pole, and post-processed in GPS Pathfinder Office v4.20 with a base station file provided by Arko Lucieer (School of Geography and Environmental Studies, University of Tasmania) from a Leica unit mounted in the science building (with external antenna on north wall).
When the quarry face was surveyed the ranging pole was held directly over the lip of the quarry.
The file "BASE26-02-11.SSF" is a second base station file collected from a second ProXH receiver, mounted on a tripod over survey mark BM5, with ITRF 2000 co-ordinates as obtained from the data centre (-66 degrees 16' 55.68615", 110 degrees 31' 40.7862", 38.55 m (ITRF 2000 datum)), and an antenna height of 0.75 m. The second base station file was used in the differential correction for those points collected towards the end of the session.
Lengths are in metres, Areas are in square metres and Heights are in metres above mean sea level.
Bedrock
These 15 points are spot heights of exposed bedrock at the base of the open excavation (areas uncovered as of the 26/02/2011). These points have since been covered with clean fill and are no longer exposed. The height of the bedrock is variable, with high unweathered ridges and lower more weathered 'leads' following a north-east/south-west orientation.
Biopile - area
These polygons mark the position of the berms used to form Biopiles 1,2 and 4.
Datalogger
These two points indicate the position of two dt80 dataloggers collecting data for the Contaminated Sites Group from the upper PRB and the biopiles. The upper PRB datalogger is located on the northern wall of the concrete bund surrounding the MPH settling tank, to the west of the access stairs. The biopile datalogger is positioned on the western wall of a grey sea container positioned between Biopile 1 and the lower PRB
Excavation pit - area
This polygon marks the position of the excavated area as of 2pm on 26/02/2011. Most areas of the excavation had been backfilled with clean fill. In most cases, it was clear where the edge of the excavation was. In some areas, the boundary of the excavation was less distinct, particularly to the south near the access stairs to the MPH settling tank. The accuracy of this line will need to be verified by reference to a rover file collected on the day this area was excavated.
Impermeable liner
These two line features mark the position of impermeable HDPE liner placed adjacent to the concrete conduit (site services) after the surrounding contaminated material had been excavated. Clean fill had been placed in the excavated area to hold the HDPE liner in place.
Line_generic
This line marks the 'ridgeline' running along the top of biopile 4 during construction (biopile built up to 1 m height marker at the time of data collection).
Other line feature
Line features in this table indicate the finished ridgelines at the top of biopile 1 and 2 (circa 1.5m height). Other line features indicate the break of slope for the flattened 'pad' created for the biopiles to sit on, the edge of the rock berm on biopile 3, the 1m ridgeline on biopile 3, the mid line of the access road between the piles (known by the moniker "Golden Lane"), and the quarry face.
Other point feature
Point features in this table indicate the position of 50 mm pvc valves used to switch aeration to different zones in each biopile, sumps used to pump water from each biopile, access buckets built into the rock berms which house sensors and sample access tubes, and temperature sensors buried at the nominal 1 m biopile height.
Piezometer
These point features mark the position of piezometers emplaced upstream and around the lower PRB. The name attribute indicates the piezometer name (where known in the field), and whether the ranging pole had reached the base of the piezometer or was positioned at an unknown height above the base of the piezometer.
PRB wing
These line features indicate the position of the impermeable 'wings' of the upper and lower PRB. The upper PRB was mapped as a distinct 'west' and 'east' wings - the gap in between is where the cage pallet (which forms the housing for the PRB) is buried. The lower PRB was mapped as one line (to save time). It is clear from the shape of the line feature where the 'east' and 'west' wings of the lower PRB are. The cages constituting the lower PRB occupy the space in between the two (the line feature travels around the downstream (northern) side of the cages).
Sample access tube
Point features in this table mark the position of sample access tubes, temperature and oxygen sensors, moisture sensor tubes, and access buckets for these features. Heights refer to the depth in the biopile (0.5, or 1 m above liner base), 'edge' refers to where the relevant feature was exposed on the edge of the pile. 
