CITY OF PRINCE GEORGE WELLS PROTECTION PLAN
Attch_February%2026%202016%20CPG%20wells%20protection%20report%20FINAL%20DRAFT%20V3
Attch_February%2026%202016%20CPG%20wells%20protection%20report%20FINAL%20DRAFT%20V3
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
March 2015<br />
City of Prince George Well Protection Plan<br />
Table 9: Contaminant risk summary<br />
Source<br />
Potential<br />
Source<br />
Potential Contaminants of<br />
Concern<br />
Likelihood of Occurrence<br />
(fromTable 6) and rationale<br />
D (Unlikely).<br />
Magnitude of<br />
Consequence<br />
(from Table 7)<br />
Risk to<br />
Drinking Water<br />
(from Table 8)<br />
1<br />
Derailments<br />
in CN yard<br />
Hydrofluorisilicic Acid, Sodium<br />
Hypochlorite, Liquefied<br />
Petroleum Gasoline, Diesel Fuel<br />
and / or Fuel Oil, Sodium<br />
Hydroxide Solution, Methanol,<br />
Ethanol, Perchloryl Fluoride,<br />
Aluminum Smelting By-<br />
Products, Sulphuric Acid and<br />
Sodium Chlorate*<br />
In 2012 and 2013, there were 11 and<br />
eight derailments in the CN yard,<br />
respectively. The following is a list of<br />
the contaminants that were spilled 2012<br />
and 2013: Petroleum Gas, Diesel Fuel,<br />
Sodium Hydroxide Solution, Methanol,<br />
Fuel Oil, Ethanol, Environmentally<br />
Hazardous Substances, Aluminum<br />
Smelting By-products, Sulphuric Acid<br />
and Sodium Chlorate.<br />
The geology in the area is permeable<br />
(sand and gravel), no low permeability<br />
layer (silt or clay) is present above the<br />
water-bearing sands and gravels. The<br />
aquifer in the vicinity of the CN Yard is<br />
thus vulnerable to contamination. The<br />
CN yard is between 1.8 and 3.8 km<br />
away and downstream from the existing<br />
wells. There are no immediate plans for<br />
new wells; however, in future (>10<br />
years), the City may decide to install a<br />
well closer to the CN yard.<br />
2 (Minor).<br />
Future wells<br />
would need to<br />
avoid CN yard.<br />
Low<br />
2<br />
Derailments<br />
on railway<br />
track and<br />
train<br />
collisions<br />
Hydrofluorisilicic Acid, Sodium<br />
Hypochlorite, Liquefied<br />
Petroleum Gasoline, Diesel Fuel<br />
and / or Fuel Oil, Sodium<br />
Hydroxide Solution, Methanol,<br />
Ethanol, Perchloryl Fluoride,<br />
Aluminum Smelting By-<br />
Products, Sulphuric Acid and<br />
Sodium Chlorate*<br />
C (Possible).<br />
The last known derailment in Prince<br />
George was in 2007, eight years ago.<br />
The nearest railway to an existing<br />
production well is 24m (to Well 602).<br />
The geology in the area is permeable<br />
(sand and gravel), no low permeability<br />
layer (silt or clay) is present above the<br />
water-bearing sands and gravels.<br />
4 (Major). The<br />
City has four<br />
wells; therefore,<br />
loss of all wells<br />
with one<br />
derailment is<br />
unlikely.<br />
Very High<br />
(within 60<br />
days**)<br />
3<br />
4<br />
5<br />
Grade<br />
crossing<br />
accidents<br />
Well houses<br />
(train<br />
collision)<br />
Track<br />
maintenance<br />
chemicals<br />
Hydrofluorisilicic Acid, Sodium<br />
Hypochlorite, Liquefied<br />
Petroleum Gasoline, Diesel Fuel<br />
and / or Fuel Oil, Sodium<br />
Hydroxide Solution, Methanol,<br />
Ethanol, Perchloryl Fluoride,<br />
Aluminum Smelting By-<br />
Products, Sulphuric Acid and<br />
Sodium Chlorate*<br />
Hydrofluorisilicic Acid, Sodium<br />
Hypochlorite, Liquefied<br />
Petroleum Gasoline, Diesel Fuel<br />
and / or Fuel Oil, Sodium<br />
Hydroxide Solution, Methanol,<br />
Ethanol, Perchloryl Fluoride,<br />
Aluminum Smelting By-<br />
Products, Sulphuric Acid and<br />
Sodium Chlorate* and<br />
Hydrofluorisilicic Acid, and<br />
Sodium Hypochlorite<br />
Unknown Herbicides and<br />
Pesticides<br />
C (Possible).<br />
In Prince George in 2012 and 2013,<br />
there were two and three collisions,<br />
respectively. The nearest grade<br />
crossing is 138 m to Well 605. The<br />
geology in the area is permeable (sand<br />
and gravel), no low permeability layer<br />
(silt or clay) is present above the waterbearing<br />
sands and gravels.<br />
E (rare).<br />
In Prince George in 2012 and 2013,<br />
there eight and five dangerous goods<br />
incidences, respectively. The nearest<br />
railway to a well house is 24 m (PW<br />
602), and the well houses have not<br />
been hit by a railroad (the most recent<br />
well was installed in 2005, or 10 years<br />
ago. Therefore, the likelihood of a<br />
railroad moving 24 m off a rail is rare.<br />
4 (Major). The<br />
City has four<br />
wells; therefore,<br />
loss of all wells<br />
with one<br />
derailment is<br />
unlikely.<br />
4 (Major). The<br />
City has four<br />
wells; therefore,<br />
loss of all wells<br />
with one<br />
derailment is<br />
unlikely.<br />
Very High<br />
(within 60<br />
days**)<br />
High (within 1<br />
day**)<br />
D (Unlikely) 2 (Minor) Low<br />
Page | 50