Hi
Phil/Eva,
I just sent a record of conversation
over to Phyllis to take a look at of our meeting this morning before it goes out
to you both. While I was preparing it, I was thinking more about the
discussion we had about the sewage lagoon.
The NWB requires an engineer’s
signature and stamp so that the design is qualified to meet the design
objectives, discharge criteria etc. Without a measurable qualifier, there
is no way to ensure that the wastewater will be held in the sewage lagoon and
treated to meet effluent quality requirements. If there is a way within
the process you described this morning (Contractor proposes a design and then
the site engineer approves it before construction) for the site engineer to take
responsibility for the design and qualify the design? If there is, then I
think we can work within the process you have been using, otherwise we will have
to talk again about how to solve this.
Further to our discussion about
liners for the sewage lagoon, I did agree with Colette Spanguolo’s general
statement that a liner is probably not required for a lagoon to treat wastewater
from a seasonal camp. To further elaborate on that, depending on the
granular material and construction methods a liner may or may not be
required. Again we are looking for a lagoon that will meet the effluent
quality requirements, it is up to the engineer if a liner is required or
not.
I’m looking forward to hearing your
thoughts.
Regards,
Sarah
Sarah Gagné, EIT
Technical Advisor
ph. 867-873-8948
fx. 867-873-8952
Gjoa Haven, NU X0B
1J0