We are staying at a medium-sized residential/air BNB type place in Nashville. It is near downtown so obviously connected to municipal sewer. Why do they have what appears to be sewage collection tanks in the lower parking garage under the building?
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Looks like these Proceptor Grease Interceptors.
700-032-Proceptor-Grease-Sell-Sheet-LOW.pdf (350.7 KB)
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That’s what I thought, too, JR.
Scroll to the bottom…( Fiberglass and Plastic alternatives Lack of adequate location has resulted in special plastic tanks being installed in basements or parking garages.)
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They do. But there is no restaurant in this building, and they were clearly collecting sewage. You could smell it when you got nearby. That’s actually why I went to check it out, lol.
When near them, you could hear the constant flow of water going into them.
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I guess you could’ve had those lids off fast with a cordless and sockets for a proper inspection, Ryan…LOL!
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With all the Tennessee BBQ and beer I’ve been consuming here, most of what’s in there might be mine. 
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Was there a parking garage?
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He stated that there WAS:
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My wag is one of two scenarios.
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Septic is a backup system in the event of a power outage; provided the municipal sewer system relies on a lift or pump station.
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Water treatment consists of several stages. The local treatment plant may require stage one (separation) to take place at the point of origin.
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Good possibilities. Thanks Brian!
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Thank Google, lol.
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Maybe the city sewer is higher and these are septic lift tanks with grinder pumps. I see smaller discharge pipes commonly out the top.
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That’s exactly what I thought as soon as I saw them as well.
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Are you gonna casually ask management if there’s a checkout?
Hey! What’s with the poop barrels in the garage… … … . …
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So, I have been involved in many of the new builds in the downtown area of Nashville for the past 12 or so years working for the banks doing progress inspections. Since that is in the lower part of an underground parking garage it is very possible that those are water detention tanks. Storm and groundwater(lots of groundwater in underground areas of Nashville) is collected and put into those tanks and it is then pumped into the storm water sewer in a controlled fashion.
I do not think those are sewage ejection collection tanks due to the way the discharge(output) pipes are connected. I’m also pretty sure it would also be against city ordinances to have a multi-family housing complex system like that. I have no clue why it had an odor, perhaps it was a bad connection somewhere, maybe an open tank. What’s that address to the building?
All of the PVC pipes coming into the tanks had traps where they came through the parking garage ceiling. The whole level where these tanks were smelled like sewage.
Address is 1620 21st Avenue South, Nashville, TN 37212.
I should have taken more pictures. We aren’t there anymore.
I definitely would have. Nobody around though. All contactless operations.
In my street, half of the street is gravity fed sewer system, the other half is lower so the water company installs grinder tanks with 3/4 pvc outlet to pump the sewage to the gravity side. Just my 2 cents.
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So that is Village 21 or V21, I was at that project for 18 months about every 3-4 weeks for the lender and owner! Those tanks are grease traps for the restaurants on the 21st Ave side of the building. That property had such a small footprint that they had not place to put the grease traps except above ground in the parking garage. I think there should have been six of them from what I can recall.
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There were a couple restaurants next door, but not directly in this building as far as I could tell. But then my question is, why we’re all the PVC pipes going into the tanks trapped where they came out of the parking garage ceiling?
Is the idea to catch grease and food scraps that might go down the sanitary drains?