Updated – January 2017: In October 2016, Squamish Nation Chiefs and Council voted to select air cooling as the cooling technique Woodfibre LNG Limited will use to cool its LNG facility. Find out more: woodfibrelng.ca/squamish-nation-announces-decision-on-woodfibre-lng-plant-cooling-technology/.
Thanks for getting in touch Don.
The Woodfibre Project team has taken a very close look at the potential effects of using a seawater cooling system. Our proposal will not cause a negative effect on ocean temperatures. Within 10 metres of the seawater diffuser, water temperatures will be just 1°C above the ambient temperature.
The specific studies undertaken to reach this conclusion can be found in Section 5.10 of our Environmental Assessment Certificate Application.
We also wanted to address your question regarding chlorination. To prevent clogging of the seawater cooling system intake lines, a bio-fouling agent such as sodium hypochlorite may be required. Prior to discharge, the seawater will pass through a de-aeration tank and, if required, a de-chlorination agent will be added to the water so the concentration of residual chlorine will meet or exceed the Canadian water quality guideline.
Finally, we wanted to make sure you have seen the information sheet we put together on our proposed seawater cooling system.