The length of septic trenches should be determined by the type of ground you have, long trenches are used when the ground doesn't adsorb well and as you are on a hillside, so you may need longer trenches. Although 3 x 19m trenches seem a pretty long to me and may be unnecessary unless you have a big family. The builder may also be building the septic system according to the size of your home and the number of waste outlets you have, 2 or more toilets will increase the technical load on the septic. What is the fall on the block, as that will also determine the type and size of septic outfall installed.
If you were building a passive sustainable home, you could use a different type of septic outfall disposal, like a deep filter pit, or a wide shallow pit. Which way is your site orientated, as that can be important for a number of reasons when building.
You also mention you have no power and will need to get it brought to the block, that may cost you tens of thousands of dollars and then you are faced with power bills and many blackouts, as they are common in Tas. Do you have access to a line transformer, what will that cost to connect to and if you don't have access to a transformer, you will have to have one installed and that will run into big dollars. If you need just one pole from the transformer, it will be expensive, then you may need at least one pole on your property, which will double the expense. Unless it has changed, you will need hydro to install the road poles and an electrician to install any poles on you property. I know many people who have had quotes of $25000 to $120000 to connect the hydro to their properties.
It may be wise to look at going off grid, you could save yourself a fortune and set yourself up for a viable sustainable future, instead of relying on rising power bills and unreliable supply. This will all depends on who you are getting to build your home, most builders won't touch alternative approaches because they don't have a clue and want as much profit as they can get. Rather than provide a home that will give the customer long term satisfaction, energy security and safety.
It's important you have a locked in building contract, which doesn't include or allow for over run costs, as they give the builder the opportunity to add things later they left off the original contract, but the council or conditions require. Is the power connection included in the building cost, if not has the builder built in their estimated cost of providing power for the build until power is connected This is very common on the industry, especially with big building companies who tend to focus on profit growth using the cheapest junk materials and approach possible. So provide an estimated build cost, then add everything they left out, so it becomes a much more expensive build and as they use junk chemically saturated materials, costly to maintain. Do you have a set contract time line for the build and builder penalties for time and cost over runs, without those, you have an open ended contract the builder can manipulate, which can increase your costs dramatically.
This link is to just one article on what you get in a modern chemical home, which most people don't have a clue about and the article only covers a very small sample of the dept of chemically saturated homes and work places people live in today. Basically modern homes and work places are killing people slowly and painfully, hence the rise in allergies, asthma, viral infections and depressive illness.
https://www.theguardian.com/science/2016/sep/14/toxic-chemicals-household-dust-health-cancer-infertility
Posted Sunday 25 Sep 2016 @ 10:32:20 pm from IP
# 
