My maintenance people are asking for a way to estimate the amount of water they are using while slow flushing hydrants to clear up red water complaints. The hydrant will run at a half-barrel for several hours until the water clears. This isnt hard flushing where we'd use a pitot to estimate...
I'm looking for a mixer that can be inserted into an existing raw water line thru a tap. I dont necessarily need to do it live, as I can power down the wells and bleed pressure, but I dont want to cut out a section of the 30" iron main. I've looked at Hayward-gordon and napier-reid, but they...
Does anyone have experience with demolition of below grade concrete water storage tanks? We are abandoning a plant with old clearwells and we want to make some greenspace.
There are two lines of thought: #1. Remove the roof piece by piece, haul off, cut the walls down to 3ft below grade, haul...
I have an elevated storage tank that will have an antenna mast installed on it. The engineer has designed nelson studs, 3/8"dia, for the attachment. the roof is 1/4" plate. How much heat rise locally is expected and does anyone know or have experience on how that can affect an interior...
I have an elevated storage tank that will have an antenna mast installed on it. The engineer has designed nelson studs, 3/8"dia, for the attachment. the roof is 1/4" plate. Does anyone know or have experience on how that can affect an interior paint/coating? thanks
Anyone have any experience with the use of nelson stud welding to attach antenna mounts to elevated water storage tanks? The structural part is OK, but I'm trying to determine the extent of damage, if any, to expect on the interior coating of the tank. The proposed studs are 3/8" dia and the...
Anyone out there hear of damage to bronze impellers in water wells due to chlorinated pre-lube water? Or leaking check valves allowing chlorinated distribution water to enter the well and corrode the impeller?
Any tips on what can cause water in an internal distribution system to color a yellow green? The fixtures have been stained the color of mountaindew/mello-yello and when the pool was filled it also had the tint. These pictures are not after sitting inthe sun, it has just been filled. Water...
2MG hydropillar style water tank will be blasted and recoated inside and out. Two containment systems have been proposed: the totally enclosed painting environment (TEPE) system with outriggers, rings and curtain, limited to deployment in winds 20mph or lower, and a scaffolding/shrink wrap...
I am looking for resources on estimating costs of off-stream reservoir construction. I have been tasked with doing an order-of-magnitude estimate to construct a 10000 ac-ft reservoir. Having never done anything with reservoirs (we're primarily groundwater), I need to educate myself on the issues...
What is causing this and is it a cause for concern? (See pic) We have 304 stainless pipe, bolts, nuts, & washers (per submittal) submerged in a storage tank holding treated, chlorinated drinking water. pH is 7.7. Chlorine residual is 1.7ppm. Pipe was installed about 6 months ago. Tank was...
What is causing this and is it a cause for concern? (See pic) We have 304 stainless pipe, bolts, nuts, & washers (per submittal) submerged in a storage tank holding treated, chlorinated drinking water. pH is 7.7. Chlorine residual is 1.7ppm. Pipe was installed about 6 months ago. Tank was...
Any ideas why I now have screens, columns and shafts scaling in a raw water supply well? When the initial water testing was done less than five years ago, none of the parameters were out of the ordinary. Is it possible for groundwater chemistry to change that quickly? These are 400-600ft wells...
We need to install a large standby generator. 800kw. Not sure of the amp rating. The most convenient location is just outside our building next to the computer services offices. The walls are brick, approx 1 ft thick with windows. The genset might be as close as 20ft from the wall. Will the...
I'm looking for formulas, research papers, nomographs, etc. that can be used to help predict the pH on concrete manhole walls due to microbially induced corrosion from thiobacillus reduction of h2s to H2SO4. I presume the resultant pH and corrosion effects can be or have been correlated to...
I'm looking for formulas, research papers, nomographs, etc. that can be used to help predict the pH on concrete manhole walls due to microbially induced corrosion from thiobacillus reduction of h2s to H2SO4. I presume the resultant pH and corrosion effects can be or have been correlated to H2S...
Historically, we've used coal-tar epoxy to coat new concrete manholes in the collection system where we expect to get lots of H2S production. I hear this material is listed as a carcinogen and the industry is moving away from it. Regardless, I am less than happy with its performance and am not...
Historically, we've used coal-tar epoxy to coat new concrete manholes in the collection system where we expect to get lots of H2S production. I hear this material is listed as a carcinogen and the industry is moving away from it. Regardless, I am less than happy with its performance and am not...
I have a newly installed 24" Ribbed PVC pipe that is not yet in service. It has about 15' of cover. In the pipe zone it has clean washed sand to 1 ft above the crown. The backfill above the pipe zone is a sandy clay compacted pretty tight, say 95% proctor, all the way up. The pipe was air tested...
