I need some kind of air valve. I need the valve to cycle through 10 different outlets from one inlet that comes from a conventional air compressor. So, it would work with air like a hydrotech valve works for water.
The project is a sewage treatment plant handling flows of about 10k gpd.
My...
We are to install new manholes over an existing waterline that presently has sufficient soil frost-depth. The manhole will be vented to air that can reach -30c. Since we are now losing the insulating value of the soil cover by installing the manhole, do we now need to be concerned about...
If the percentage of oversize varies in the field from the proctor value, it makes sense to correct the field densities. It is more labour intensive to dig up each test location and assess the percentage oversize. Most techs I know use a graph of oversize values. We also developed a quick...
Absolutely you would. If the soil underlying the proposed foundation has insufficient strength or bearing properties that deems it unacceptable for supporting the foundation, it needs to be dug out and replaced with structural fill, that means you dig out as well as down (per above).
Don't put the drain down-gradient of the septic field or it will be taking on effluent from the field. Above gradient it is a good idea, and I would go one step further and line the down-side of the interceptor (side of the interceptor trench closer to the field) with a 6mil poly barrier. Make...
Probably. Cash talks. You should be compensated for the potential lessened life of the pavement. There is unlikely anything will happen in five or ten years. But a 30 year life might be reduced to 25 (just pulling a number out)
It depends. If it is strictly information or for QC, then it should be fine, if it is for QA purposes, potential litigation or comparison testing, then the results can't be used. Tank temperature is more important. Was the temperature of the water monitored?
Be really careful though that there is not any intended elasticity for the anchors. I have seen marine applications (dolphins specifically) where stressing the bolt is intended to provide some elasticity. In that case, grout would defeat that purpose.
If it was higher permeability than I would be more inclined to question the result, but low permeability would more easily be explained by the mere over-consolidation of the deposit. I have seen gravelly till soils that have much lower permeabilites than the above numbers just due to the...
I would be pulling the trigger. It is most likely that the specs read 4000psi at 28 days, not 256 or whenever the supplier is comfortable. As a result, the concrete should be considered failed. Should it be ripped out? Probably not, but certainly either a performance bond or significant...
fattdad: I have to admit that I have a real problem with that. I can understand your reasoning, but why place that burden on the local consultants? There is lots of available software out there (we use Golden Strater for instance). I have a problem with government agencies in essence...
f-d...I'm really not certain. The request came down from significantly higher up the food chain. My only additional information is that it is related to the hydrogeology on the site and that SPT information is insufficient. It wouldn't be appropriate to discuss more of the particulars on an...
Thanks Mike. By California sampler, I am thinking a large-diameter SPT sampler? I agree and and am going to source a mud rotary rig. The o-rings I assume are to seal up the tip of the sampler. Would you just use the weight of soil recovered and the measured volume of the sampler to determine...
Does anyone have a methodology for determining the density of non-cohesive sand at a depth up to 50m? There will be groundwater. I am considering either a hollow stem auger or sonic drilling apparatus and drilling to just above the test zone. I would then need to either use a clamshell or...
The biggest problem I've encountered with doing and reviewing Atterbergs (and I have done many) is that the tech is not really diligent about making sure that ALL of the material that is chosen for the test that CAN be broken down IS broken down for the test. What happens is, the tech gets...
