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SUBSURFACE LANDFILL FIRE
SUPPRESSION AND MONITORING
A Case Study at the Campbell
Mountain Landfill, Penticton, British Columbia
Thermistor
Installation.
In order to measure the temperature gradient around each of the
boreholes, Thermistor "strings" were installed in the
deep standpipes at each location. The Thermistor strings, supplied
by RST Instruments, consisted of a series of temperature sensors
connected at approximately 5 metre intervals to a cable. Insulated
baffles were installed between each of the sensors to minimize
the possibility of convective movement of gas within the standpipe
tubing. The up-hole end of the Thermistor cable was secured to
a terminal box within which a military coupler was installed for
easy connection to the monitoring equipment. A summery of the
Thermistor depths is presented in Table1.
Temperature
readings were obtained by connecting a digital thermometer (Omega
Model 866) to the Thermistor terminal box. The Thermistors were
numbered sequentially down the hole, with #1 always being the
shallowest Thermistor.
The digital Thermistor unit was arranged
such that the temperatures at each level would be measured sequentially
by turning a dial.
| Table1
THERMISTOR
INFORMATION |
| Number |
Length
(m) |
Number
of Sensors |
Spacing
(M) |
| GVM98-1 |
29 |
6 |
5,10,15,20,25,29 |
| GVM98-2
|
24 |
4 |
6,12,18,24 |
| GVM98-3
|
16.8 |
3 |
5,11.5,16.8 |
| GVM98-4
|
10.1 |
2 |
5,10.1 |
| GVM98-5
|
16.2 |
3 |
5,10.5,16.2 |
| GVM98-6
|
21.4 |
4 |
6,11,16,20.4 |
| GVM98-7
|
20.2 |
4 |
5,10,15,20.2 |
| GVM98-8
|
9.5 |
2 |
5,9.5 |
          
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initial
monitoring results
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