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Re: Containment Area

This company has two major problems:
     1.  As Thomas Barron pointed out, the slab was not properly designed,
at least for the purpose to which it is now being put.  Properly
reinforced, cured and dimensioned concrete should not behave that way.
     2.  Under no circumstances should a concrete containment area be a
receptacle for wastewater on a regular basis.  I'd ask why it was occurring
-- frequent wastewater system upsets? power outages? improper capacity
system? and try and overcome them first, as well as looking at potential
reductions in influent volume as a way of preventing future overflows.  If
none of these things work, the company needs to install automatic shut-off
valves and install more tankage.
Bill Wilson, EPA Region 9 Pollution Prevention Coordinator
75 Hawthorne Street, San Francisco CA 94105
phone 415.744.2192 fax 415.744.1796 email wilson.bill@epamail.epa.gov

John_Burke@owr.ehnr.state.nc.us on 11/21/97 09:59:24 AM

Please respond to p2tech@great-lakes.net

To:   p2tech@great-lakes.net
cc:    (bcc: Bill Wilson)
Subject:  Containment Area

There is a company having problems with cracking on the floor of their
cement containment area.  There are two large (50,000 gallon) holding
vessels in this containment area which feed wastewater to a treatment
system.  Occasionally there with be a overfl
ow from these tanks which is captured in the containment area and pumped
back into the system but there has been some leakage on occasion,
potentially from the cracks.  The facility repairs the cracks but they
continue to appear.  The company is currrentl
y looking at a membrane to cover the surface of the containment area but
fear this too may crack.  Does anyone have information on techniques to
resolve containment problems like this?
John Burke