I work for the Forest Service, and am working on developing plans to install new signage on approximately 45-miles of unpaved Forest road.
The speed limit is posted at 35-mph. There are about ten of the old style Forest Facility signs, that are installed in raised mortared rock platforms...
What gases would be expected to off gas from a vault toilet.
For those who may not know: A vault toilet consists of a reinforced concrete vault, with an epoxy lining, with a toilet seat assembly bolted to the top slab of vault. Typically a precast concrete building is placed on top for...
I'm working on developing an electric heater to be inserted into a 10-inch id polyethylene pipe, that is the vent for the vault on a vault toilet.
The vault is normally vented by the convection generated in the black pipe as it heats in the sun. Which warms the air and causes air to flow in...
I'm working with a Design Consultant, to solve a problem with a low head dam in a wilderness area.
He is proposing to reline a stilling basin, at the diversion to a micro-hydro power plant with welded mild steel. (Long ugly story of multiple, un-engineered band-aid fixes over the last hundred...
Not sure if this is the right group to ask, but I think you will know either the answer or who to ask:
One of the hydrologists working on a mine tailings environmental study just walked in and asked if I had a table that shows the solubility of various metals as a function of the pH.
I found...
The current and last several versions of NFPA 10, require a maximum travel distance of 75-feet to fire extinguishers in commercial builings.
Does anyone have a copy of the code in force in 1992, that can tell me what it was then?
I have a leased building that has two hall ways with fire...
I am designing a fish screening system for a gravity irrigation deiversion from a natural stream.
It is basically a wedge wire drum, 6-ft long, 18-in diameter, with 0.0675 wires and gaps. It is similar to a well screen, with a pvc diffuser inside of it with a bunch of 7/8-inch diameter holes...
Does anyone know of a NEC requirement for horizontal seperation on direct bury conductor?
I am installing a 240V, 3-phase, 20-amp, direct buried feed from a pump to a subpanel at the pump inlet screen. The screen is a mesh drum that rotates, and has a pump to feed a spray bar, that rinses...
