Good point, Jared, regarding confined space protocols. When I was in industry, the rule was “two people on any confined space job.” The second person stays outside and watches. If the first person runs into trouble, the second raises the alarm but does NOT enter the space until help is on the scene.
On Mon, Sep 13, 2021 at 3:24 PM Jared Cabot via time-nuts < [email protected]> wrote: > Also, don't forget about ventilation if you will be entering the > underground space. > This sort of thing is classed as a 'confined space' and there should be > oxygen monitoring in place while inside to prevent asphyxiation. > Ventilation may work against the thermal isolation goals, but it's better > than being found laying at the bottom of a pit.. > > > Jared. > > > > > > > \-------- Original Message -------- > On Sep 9, 2021, 9:38 PM, Dana Whitlow < [email protected]> wrote: > > > > > > > > > Tom, > > > > Andy brings up good points, especially about water leaks. > > Are you familiar with "Whitlow's 5th law" (which can be summarized > > as "everything leaks")? > > > > Dana Whitlow > > > > > > On Thu, Sep 9, 2021 at 7:29 AM Andy Gardner, ZL3AG via time-nuts < > > [email protected]> wrote: > > > > > > > > > > > So the 2 things you're after are thermal insulation and vibration > > > insulation? > > > > > > Digging can be expensive, and you have to worry about water table in > many > > > locations. > > > > > > How about the thickest concrete water tank you can find, plonk it in a > > > nice location, spray layers of polyurethane foam over the top and > sides for > > > thermal insulation, then build a wind shield ("shed") around it. The > shed > > > could be an old coolstore, adding more insulation. > > > > > > Concrete water tanks are out of fashion these days due to plastics, so > if > > > you shop around you can find a cheap used one, and then it's just the > > > trucking/crane charges. > > > > > > > > > > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > > > time-nuts mailing list -- [email protected] -- To unsubscribe > send > > > an email to [email protected] > > > To unsubscribe, go to and follow the instructions there. > > > > > > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > > time-nuts mailing list -- [email protected] -- To unsubscribe > send an email to [email protected] > > To unsubscribe, go to and follow the instructions there. > >_______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send > an email to [email protected] > To unsubscribe, go to and follow the instructions there. -- Jeremy Nichols Sent from my iPad 6. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
